# HazComFast reference text > The full text of HazComFast's OSHA reference corpora, from the same data the pages render: 182 OSHA standard pages and 222 glossary terms, then the list of every guide. The curated map is at https://hazcomfast.com/llms.txt. Regulation quotes are labeled. "Verbatim" is the Code of Federal Regulations' own text; "summary" is a paraphrase. Each entry links to its page, which carries the sources. ## Key dates and amounts - HCS 2024 (29 CFR 1910.1200(j)): substances, manufacturers May 19, 2026, employers November 20, 2026; mixtures, manufacturers November 19, 2027, employers May 19, 2028. - OSHA civil penalty maximums, 2026 (29 CFR 1903.15(d)), per violation: serious $16,550; willful $165,514; repeated $165,514. ## OSHA standards (182) ### 29 CFR 1910.22: General Requirements for Walking-Working Surfaces URL: https://hazcomfast.com/osha-standard/1910-22-general-walking-working-surfaces 29 CFR 1910.22 sets the general requirements for walking-working surfaces in general industry: all surfaces must be kept clean, orderly, and sanitary, maintained in good repair, and kept free of hazards such as spills, protruding objects, and debris, so that slip, trip, and fall hazards are controlled. Regulation text (summary, 29 CFR 1910.22(a)(1)): All places of employment, passageways, storerooms, service rooms, and walking-working surfaces are kept in a clean, orderly, and sanitary condition. ### 29 CFR 1910.23: Ladders (General Industry) URL: https://hazcomfast.com/osha-standard/1910-23-ladders 29 CFR 1910.23 sets the requirements for portable and fixed ladders in general industry: ladders must be inspected before use, used only for their designed purpose, kept on stable footing, and removed from service when defective. It pairs with the construction ladder standard (1926.1053) as the general-industry rulebook for safe ladder use. Regulation text (verbatim, 29 CFR 1910.23(b)(1)): The employer must ensure: (1) Ladder rungs, steps, and cleats are parallel, level, and uniformly spaced when the ladder is in position for use; ### 29 CFR 1910.25: Stairways (General Industry) URL: https://hazcomfast.com/osha-standard/1910-25-stairways 29 CFR 1910.25 sets the requirements for stairways in general industry: stairs must have uniform riser heights and tread depths between landings, adequate strength to carry their loads, minimum clearances, and handrails and stair rail systems, so workers can use them without tripping or falling. Regulation text (summary, 29 CFR 1910.25(b)(3)): Stairs have uniform riser heights and tread depths between landings; ### 29 CFR 1910.26: Dockboards URL: https://hazcomfast.com/osha-standard/1910-26-docking-facilities 29 CFR 1910.26 is the dockboards standard. Dockboards, bridge plates or dock plates, span the gap between a loading dock and a truck or railcar so material-handling equipment can cross. The standard requires each dockboard to have enough capacity for the load, to be secured or equipped so it does not move out of position while in use, and to have measures (such as run-off guards or curbs) that keep powered trucks from running off the edge. Regulation text (verbatim, 29 CFR 1910.26(a)): The employer must ensure that each dockboard used meets the requirements of this section. ### 29 CFR 1910.27: Scaffolds and Rope Descent Systems (GI) URL: https://hazcomfast.com/osha-standard/1910-27-scaffolds-rope-descent-systems 29 CFR 1910.27 covers scaffolds and rope descent systems (RDS) in general industry: used for building maintenance such as window washing. Before a rope descent system is used, the building owner must inform the employer in writing that each anchorage has been identified, tested, certified, and maintained to support at least 5,000 pounds per worker, and RDS use is capped at 300 feet. Regulation text (verbatim, 29 CFR 1910.27(b)(1)(i)): Before any rope descent system is used, the building owner must inform the employer, in writing that the building owner has identified, tested, certified, and maintained each anchorage so it is capable of supporting at least 5,000 pounds (2,268 kg), in any direction, for each employee attached. ### 29 CFR 1910.28: Duty to Have Fall Protection (GI) URL: https://hazcomfast.com/osha-standard/1910-28-duty-fall-protection 29 CFR 1910.28 is the general-industry duty to provide fall protection: employers must protect each worker on a walking-working surface with an unprotected edge 4 feet or more above a lower level, using guardrails, safety nets, or a personal fall protection system. The 4-foot trigger is lower than construction's 6 feet: the point most often confused. Regulation text (verbatim, 29 CFR 1910.28(b)(1)(i)): Except as provided elsewhere in this section, the employer must ensure that each employee on a walking-working surface with an unprotected side or edge that is 4 feet (1.2 m) or more above a lower level is protected from falling by one or more of the following: (A) Guardrail systems; (B) Safety net systems; or (C) Personal fall protection systems, such as personal fall arrest, travel restraint, or positioning systems. ### 29 CFR 1910.29: Fall Protection Systems and Falling Object Protection URL: https://hazcomfast.com/osha-standard/1910-29-fall-protection-systems 29 CFR 1910.29 sets the criteria that general-industry fall-protection systems must meet: guardrail top rails at 42 inches (plus or minus 3) able to withstand a 200-pound force, safety nets no more than 30 feet below the surface, and personal fall arrest anchorages rated for 5,000 pounds per worker, or designed to a safety factor of at least two under a qualified person, 1910.140(c)(13) allows either. It is the 'how' to the 1910.28 duty. Regulation text (summary, 29 CFR 1910.29(b)(1)): The top edge height of top rails, or equivalent guardrail system members, are 42 inches (107 cm), plus or minus 3 inches (8 cm), above the walking-working surface. ### 29 CFR 1910.30: Training Requirements for Fall Protection (GI) URL: https://hazcomfast.com/osha-standard/1910-30-fall-protection-training 29 CFR 1910.30 requires a qualified person to train general-industry workers, before they are exposed to a fall hazard, on the nature of the hazards and the correct use, inspection, and limitations of fall-protection systems, plus the hazards of equipment such as dockboards and rope descent systems. Retraining is required when skills lapse. It mirrors construction's 1926.503. Regulation text (verbatim, 29 CFR 1910.30(a)(1)): Before any employee is exposed to a fall hazard, the employer must provide training for each employee who uses personal fall protection systems or who is required to be trained as specified elsewhere in this subpart. ### 29 CFR 1910.36: Design and Construction Requirements for Exit Routes URL: https://hazcomfast.com/osha-standard/1910-36-exit-routes-design 29 CFR 1910.36 sets how exit routes must be designed and built: they must be permanent parts of the building, normally at least two separate exits located far enough apart to stay usable if one is blocked, of adequate width and height, fire-resistance-rated, and discharging to a safe area outside. Regulation text (verbatim, 29 CFR 1910.36(b)(1)): At least two exit routes must be available in a workplace to permit prompt evacuation of employees and other building occupants during an emergency, except as allowed in paragraph (b)(3) of this section. The exit routes must be located as far away as practical from each other so that if one exit route is blocked by fire or smoke, employees can evacuate using the second exit route. ### 29 CFR 1910.37: Maintenance, Safeguards, and Operational Features for Exit Routes URL: https://hazcomfast.com/osha-standard/1910-37-exit-route-maintenance 29 CFR 1910.37 requires employers to keep exit routes usable at all times: free of obstructions and combustibles, adequately lit, and marked with illuminated EXIT signs, so workers can evacuate quickly in an emergency. The companion rule that exit doors open from the inside is 1910.36(d), not this section. Regulation text (verbatim, 29 CFR 1910.37(a)(3)): Exit routes must be free and unobstructed. No materials or equipment may be placed, either permanently or temporarily, within the exit route. The exit access must not go through a room that can be locked, such as a bathroom, to reach an exit or exit discharge, nor may it lead into a dead-end corridor. ### 29 CFR 1910.38: Emergency Action Plans URL: https://hazcomfast.com/osha-standard/1910-38-emergency-action-plans 29 CFR 1910.38 requires an emergency action plan wherever another OSHA standard mandates one: it must cover evacuation procedures and routes, how employees are accounted for after evacuation, the alarm system, and the rescue and medical duties of assigned employees. Employers with 10 or fewer employees may communicate it orally. Regulation text (verbatim, 29 CFR 1910.38(b)): An emergency action plan must be in writing, kept in the workplace, and available to employees for review. However, an employer with 10 or fewer employees may communicate the plan orally to employees. ### 29 CFR 1910.39: Fire Prevention Plans URL: https://hazcomfast.com/osha-standard/1910-39-fire-prevention-plans 29 CFR 1910.39 requires a fire prevention plan where another standard mandates one: it must list the major fire hazards, the procedures for handling and storing flammable materials, the controls on ignition sources, and who maintains the fire-prevention equipment. It focuses on stopping fires before they start, complementing the emergency action plan. Regulation text (verbatim, 29 CFR 1910.39(b)): A fire prevention plan must be in writing, be kept in the workplace, and be made available to employees for review. However, an employer with 10 or fewer employees may communicate the plan orally to employees. ### 29 CFR 1910.101: Compressed Gases (General Requirements) URL: https://hazcomfast.com/osha-standard/1910-101-compressed-gases 29 CFR 1910.101 sets the general requirements for compressed gases in general industry: each employer must determine that cylinders under its control are in safe condition by visual inspection, and follow the Compressed Gas Association practices for safe handling, cylinders secured upright, valve caps in place, and oxygen separated from fuel gases. Regulation text (verbatim, 29 CFR 1910.101(a)): Each employer shall determine that compressed gas cylinders under his control are in a safe condition to the extent that this can be determined by visual inspection. ### 29 CFR 1910.106: Flammable Liquids URL: https://hazcomfast.com/osha-standard/1910-106-flammable-liquids 29 CFR 1910.106 governs the storage and handling of flammable liquids in general industry: liquids are classified by flash point, stored in approved containers and flammable-storage cabinets with quantity limits, kept away from ignition sources, and bonded and grounded during transfer to prevent static ignition. It is the core standard for solvents, fuels, and paints. Regulation text (summary, 29 CFR 1910.106(d)(3)(i)): Not more than 60 gallons of Category 1, 2 or 3 flammable liquids, nor more than 120 gallons of Category 4 flammable liquids may be stored in a storage cabinet. ### 29 CFR 1910.107: Spray Finishing Using Flammable and Combustible Materials URL: https://hazcomfast.com/osha-standard/1910-107-spray-finishing 29 CFR 1910.107 governs spray finishing using flammable and combustible materials: spraying must be done in approved, adequately ventilated spray booths, electrical equipment in the spray area must be explosion-proof, ignition sources are prohibited, and fire protection must be provided. It controls the explosive atmosphere that spray painting creates. Regulation text (verbatim, 29 CFR 1910.107(c)(2)): There shall be no open flame or spark producing equipment in any spraying area nor within 20 feet thereof, unless separated by a partition. ### 29 CFR 1910.109: Explosives and Blasting Agents URL: https://hazcomfast.com/osha-standard/1910-109-explosives-blasting-agents 29 CFR 1910.109 governs explosives and blasting agents in general industry. It requires that explosives be stored in approved magazines that meet the standard's construction and location requirements, and it sets rules for the safe handling, transportation, and use of explosives, blasting agents, and related materials, with the goal of preventing the accidental initiation, fire, and detonation hazards these materials present. Regulation text (verbatim, 29 CFR 1910.109(c)(1)(i)): All Class A, Class B, Class C explosives, and special industrial explosives, and any newly developed and unclassified explosives, shall be kept in magazines which meet the requirements of this paragraph. ### 29 CFR 1910.110: Storage and Handling of Liquefied Petroleum Gases URL: https://hazcomfast.com/osha-standard/1910-110-lp-gas-storage 29 CFR 1910.110 governs the storage and handling of liquefied petroleum gases (propane and similar fuels): LP-gas must be effectively odorized so a leak is detectable by smell, and containers, valves, regulators, and piping must be approved, properly located, and protected against overpressure, leaks, and ignition sources. Regulation text (verbatim, 29 CFR 1910.110(b)(1)(i)): All liquefied petroleum gases shall be effectively odorized by an approved agent of such character as to indicate positively, by distinct odor, the presence of gas down to concentration in air of not over one-fifth the lower limit of flammability. ### 29 CFR 1910.119: Process Safety Management of Highly Hazardous Chemicals URL: https://hazcomfast.com/osha-standard/1910-119-process-safety-management 29 CFR 1910.119, Process Safety Management (PSM), is OSHA's rule for preventing catastrophic chemical releases: it applies when a process holds a listed highly hazardous chemical at or above its threshold, or 10,000 pounds of a flammable, and requires a 14-element program including process hazard analysis, mechanical integrity, and management of change. Regulation text (verbatim, 29 CFR 1910.119(e)(1)): The employer shall perform an initial process hazard analysis (hazard evaluation) on processes covered by this standard. The process hazard analysis shall be appropriate to the complexity of the process and shall identify, evaluate, and control the hazards involved in the process. ### 29 CFR 1910.120: Hazardous Waste Operations and Emergency Response (HAZWOPER) URL: https://hazcomfast.com/osha-standard/1910-120-hazwoper 29 CFR 1910.120, HAZWOPER, protects workers in hazardous waste cleanup, at treatment, storage and disposal (TSD) facilities, and in emergency response to releases of hazardous substances. Construction work falls under its twin, 29 CFR 1926.65, which repeats it paragraph for paragraph and points to the construction standards instead. Both require a written safety and health program, training set by the job, medical surveillance and decontamination. Regulation text (verbatim, 29 CFR 1910.120(b)(1)(i)): Employers shall develop and implement a written safety and health program for their employees involved in hazardous waste operations. The program shall be designed to identify, evaluate, and control safety and health hazards, and provide for emergency response for hazardous waste operations. Texts re-read against the eCFR on September 30, 2026. ### 29 CFR 1910.132: General Requirements for PPE URL: https://hazcomfast.com/osha-standard/1910-132-ppe-general-requirements 29 CFR 1910.132 is OSHA's general PPE standard for general industry: employers must assess the workplace for hazards in writing, select and provide appropriate PPE at no cost to workers, and train them on its use. PPE is the last line of defense, applied after engineering and work-practice controls. Regulation text (verbatim, 29 CFR 1910.132(d)(1)): The employer shall assess the workplace to determine if hazards are present, or are likely to be present, which necessitate the use of personal protective equipment (PPE). If such hazards are present, or likely to be present, the employer shall: (i) Select, and have each affected employee use, the types of PPE that will protect the affected employee from the hazards identified in the hazard assessment; (ii) Communicate selection decisions to each affected employee; and, (iii) Select PPE that properly fits each affected employee. ### 29 CFR 1910.133: Eye and Face Protection URL: https://hazcomfast.com/osha-standard/1910-133-eye-face-protection 29 CFR 1910.133 requires ANSI Z87.1-compliant eye and face protection for general-industry workers exposed to flying particles, molten metal, liquid chemicals, gases or vapors, or injurious light. The specific hazard picks the device (safety glasses with side shields, chemical goggles, or a face shield with the correct filter shade) not one universal pair. Regulation text (verbatim, 29 CFR 1910.133(a)(1)): The employer shall ensure that each affected employee uses appropriate eye or face protection when exposed to eye or face hazards from flying particles, molten metal, liquid chemicals, acids or caustic liquids, chemical gases or vapors, or potentially injurious light radiation. ### 29 CFR 1910.135: Head Protection URL: https://hazcomfast.com/osha-standard/1910-135-head-protection 29 CFR 1910.135 requires general-industry workers to wear ANSI Z89.1-compliant head protection wherever falling objects or exposed electrical conductors could injure the head. The helmet's electrical class must match the hazard: Class G to 2,200 volts, Class E to 20,000 volts, and Class C offering no electrical protection at all. Regulation text (verbatim, 29 CFR 1910.135(a)(1)): The employer shall ensure that each affected employee wears a protective helmet when working in areas where there is a potential for injury to the head from falling objects. ### 29 CFR 1910.136: Foot Protection URL: https://hazcomfast.com/osha-standard/1910-136-foot-protection 29 CFR 1910.136 requires general-industry workers to use ASTM F2412/F2413-rated protective footwear where there is a danger of foot injury from falling or rolling objects, sole punctures, or residual electrical hazards. The electrical ratings are opposites (electrical-hazard footwear insulates, while conductive footwear drains static) so the rating must match the hazard. Regulation text (verbatim, 29 CFR 1910.136(a)): The employer shall ensure that each affected employee uses protective footwear when working in areas where there is a danger of foot injuries due to falling or rolling objects, or objects piercing the sole, or when the use of protective footwear will protect the affected employee from an electrical hazard, such as a static-discharge or electric-shock hazard, that remains after the employer takes other necessary protective measures. ### 29 CFR 1910.137: Electrical Protective Equipment URL: https://hazcomfast.com/osha-standard/1910-137-electrical-protective-equipment 29 CFR 1910.137 sets the design, testing, and in-service care requirements for electrical protective equipment: the rubber insulating gloves, sleeves, blankets, and covers that guard against shock. Equipment is classed by voltage, must be inspected for damage before each day's use, and rubber gloves must be electrically retested at least every six months. Regulation text (verbatim, 29 CFR 1910.137(c)(2)(ii)): Insulating equipment shall be inspected for damage before each day's use and immediately following any incident that can reasonably be suspected of causing damage. ### 29 CFR 1910.138: Hand Protection URL: https://hazcomfast.com/osha-standard/1910-138-hand-protection 29 CFR 1910.138 requires employers to select and require hand protection matched to the specific hazard: skin absorption, cuts, punctures, chemical or thermal burns, or temperature extremes. Because no glove does everything, chemical gloves are chosen by permeation breakthrough time (from SDS Section 8) and cut gloves by their ANSI/ISEA 105 level. Regulation text (verbatim, 29 CFR 1910.138(a)): Employers shall select and require employees to use appropriate hand protection when employees' hands are exposed to hazards such as those from skin absorption of harmful substances; severe cuts or lacerations; severe abrasions; punctures; chemical burns; thermal burns; and harmful temperature extremes. ### 29 CFR 1910.141: Sanitation URL: https://hazcomfast.com/osha-standard/1910-141-sanitation 29 CFR 1910.141 sets basic workplace sanitation requirements: employers must provide potable drinking water, toilet facilities scaled to the number of employees, washing facilities, and clean areas for eating, and must control vermin and dispose of waste properly. It protects the everyday health of the workforce. Regulation text (verbatim, 29 CFR 1910.141(b)(1)(i)): Potable water shall be provided in all places of employment, for drinking, washing of the person, cooking, washing of foods, washing of cooking or eating utensils, washing of food preparation or processing premises, and personal service rooms. ### 29 CFR 1910.142: Temporary Labor Camps URL: https://hazcomfast.com/osha-standard/1910-142-temporary-labor-camps 29 CFR 1910.142 sets the basic health and sanitation standards for temporary labor camps: employer-provided housing for workers, common in agriculture and some remote operations. It covers site selection and drainage, adequate shelter, a safe drinking-water supply, toilet and washing facilities, sewage disposal, garbage handling, food service, and insect and rodent control, so that housing provided to workers does not become a source of disease. Regulation text (verbatim, 29 CFR 1910.142(a)(1)): All sites used for camps shall be adequately drained. They shall not be subject to periodic flooding, nor located within 200 feet of swamps, pools, sink holes, or other surface collections of water unless such quiescent water surfaces can be subjected to mosquito control measures. ### 29 CFR 1910.144: Safety Color Code for Marking Physical Hazards URL: https://hazcomfast.com/osha-standard/1910-144-safety-color-code 29 CFR 1910.144 establishes the OSHA safety color code for marking physical hazards. Red is the basic color for identifying fire-protection equipment, danger, and stop (including emergency stop devices); yellow is the basic color for designating caution and marking physical hazards such as striking against, stumbling, falling, tripping, and caught-in-between. Consistent colors let workers instantly recognize hazards and safety equipment. Regulation text (verbatim, 29 CFR 1910.144(a)(3)): Yellow shall be the basic color for designating caution and for marking physical hazards such as: Striking against, stumbling, falling, tripping, and "caught in between." ### 29 CFR 1910.145: Specifications for Accident Prevention Signs and Tags URL: https://hazcomfast.com/osha-standard/1910-145-accident-prevention-signs 29 CFR 1910.145 standardizes the design and use of workplace safety signs and tags so their color and signal word carry a consistent meaning: DANGER signs (red) for immediate hazards, CAUTION signs (yellow) for potential hazards, safety-instruction signs for general guidance, and accident-prevention tags for temporary hazards such as out-of-service equipment. Regulation text (verbatim, 29 CFR 1910.145(c)(1)(ii)): All employees shall be instructed that danger signs indicate immediate danger and that special precautions are necessary. ### 29 CFR 1910.146: Permit-Required Confined Spaces URL: https://hazcomfast.com/osha-standard/1910-146-confined-spaces 29 CFR 1910.146 governs permit-required confined spaces in general industry: employers must evaluate their spaces, and for those with atmospheric or other serious hazards, use a permit system with atmospheric testing, an attendant, an entry supervisor, and rescue arrangements before anyone enters. Not every confined space is permit-required, but every one must be evaluated. Regulation text (verbatim, 29 CFR 1910.146(c)(1)): The employer shall evaluate the workplace to determine if any spaces are permit-required confined spaces. ### 29 CFR 1910.147: The Control of Hazardous Energy (Lockout/Tagout) URL: https://hazcomfast.com/osha-standard/1910-147-lockout-tagout 29 CFR 1910.147, the Control of Hazardous Energy (Lockout/Tagout), requires an energy-control program (machine-specific written procedures, employee training, and at-least-annual periodic inspections) so machines are isolated and their stored energy released and verified before servicing. It covers every energy form, not just electricity, and excludes construction. Regulation text (verbatim, 29 CFR 1910.147(c)(1)): The employer shall establish a program consisting of energy control procedures, employee training and periodic inspections to ensure that before any employee performs any servicing or maintenance on a machine or equipment where the unexpected energizing, start up or release of stored energy could occur and cause injury, the machine or equipment shall be isolated from the energy source, and rendered inoperative. ### 29 CFR 1910.151: Medical Services and First Aid URL: https://hazcomfast.com/osha-standard/1910-151-medical-first-aid 29 CFR 1910.151 requires that, where no infirmary, clinic, or hospital is in near proximity, a trained first-aid provider and adequate first-aid supplies be available, and that quick-drenching or flushing facilities (eyewash and safety showers) be provided wherever workers may be exposed to injurious corrosive materials. Regulation text (verbatim, 29 CFR 1910.151(b)): In the absence of an infirmary, clinic, or hospital in near proximity to the workplace which is used for the treatment of all injured employees, a person or persons shall be adequately trained to render first aid. Adequate first aid supplies shall be readily available. ### 29 CFR 1910.155: Fire Protection – Scope, Application, and Definitions URL: https://hazcomfast.com/osha-standard/1910-155-fire-protection-scope 29 CFR 1910.155 is the scope, application, and definitions section for Subpart L: OSHA's general-industry fire-protection standards. Subpart L contains requirements for fire brigades and for all portable and fixed fire-suppression equipment, fire-detection systems, and fire or employee alarm systems installed to meet the fire-protection requirements of 29 CFR 1910. This section defines the terms used across those requirements. Regulation text (summary, 29 CFR 1910.155(a)): This subpart contains requirements for fire brigades, and all portable and fixed fire suppression equipment, fire detection systems, and fire or employee alarm systems installed to meet the fire protection requirements of 29 CFR part 1910. ### 29 CFR 1910.157: Portable Fire Extinguishers URL: https://hazcomfast.com/osha-standard/1910-157-portable-fire-extinguishers 29 CFR 1910.157 governs portable fire extinguishers provided for employee use: they must be the right type for the hazard, mounted and accessible, visually inspected monthly, and maintained annually. Crucially, the moment an employer provides extinguishers for employees to use, it must train those employees on their use and on the hazards of early-stage firefighting. Regulation text (verbatim, 29 CFR 1910.157(c)(1)): The employer shall provide portable fire extinguishers and shall mount, locate and identify them so that they are readily accessible to employees without subjecting the employees to possible injury. ### 29 CFR 1910.160: Fixed Extinguishing Systems – General URL: https://hazcomfast.com/osha-standard/1910-160-fixed-suppression-systems 29 CFR 1910.160 sets the general requirements for fixed extinguishing systems: the built-in fire-suppression systems (such as CO2, dry chemical, foam, and gaseous agent systems) installed to protect specific hazards or areas. It applies to all fixed extinguishing systems installed to meet a particular OSHA standard, except automatic sprinkler systems (which are covered by 1910.159), and requires alarms, discharge warnings where the agent is hazardous, inspection, and maintenance. Regulation text (summary, 29 CFR 1910.160(a)(1)): This section applies to all fixed extinguishing systems installed to meet a particular OSHA standard except for automatic sprinkler systems which are covered by § 1910.159. ### 29 CFR 1910.176: Handling Materials – General URL: https://hazcomfast.com/osha-standard/1910-176-materials-handling 29 CFR 1910.176 governs the handling and storage of materials in general industry: aisles and passageways must be kept clear and in good repair, stored materials must be stacked, blocked, or interlocked so they cannot slide or collapse, and mechanical handling must keep safe clearances. It addresses the everyday hazards of warehouses and storage areas. Regulation text (verbatim, 29 CFR 1910.176(b)): Storage of material shall not create a hazard. Bags, containers, bundles, etc., stored in tiers shall be stacked, blocked, interlocked and limited in height so that they are stable and secure against sliding or collapse. ### 29 CFR 1910.178: Powered Industrial Trucks (Forklifts) URL: https://hazcomfast.com/osha-standard/1910-178-powered-industrial-trucks 29 CFR 1910.178 governs powered industrial trucks (forklifts): operators must be trained, evaluated, and certified for the specific truck and workplace before operating, with a re-evaluation at least every three years. There is no portable 'forklift license': certification is tied to the employer and the equipment. Regulation text (verbatim, 29 CFR 1910.178(l)(1)(i)): The employer shall ensure that each powered industrial truck operator is competent to operate a powered industrial truck safely, as demonstrated by the successful completion of the training and evaluation specified in this paragraph (l). ### 29 CFR 1910.212: General Requirements for All Machines URL: https://hazcomfast.com/osha-standard/1910-212-machine-guarding 29 CFR 1910.212 is OSHA's general machine-guarding standard: employers must guard machine hazards (points of operation, ingoing nip points, rotating parts, and flying chips or sparks) to protect the operator and other workers in the area. It is one of OSHA's most-cited standards and a leading source of amputation citations. Regulation text (verbatim, 29 CFR 1910.212(a)(1)): One or more methods of machine guarding shall be provided to protect the operator and other employees in the machine area from hazards such as those created by point of operation, ingoing nip points, rotating parts, flying chips and sparks. ### 29 CFR 1910.213: Woodworking Machinery Requirements URL: https://hazcomfast.com/osha-standard/1910-213-woodworking-machinery 29 CFR 1910.213 governs woodworking machinery such as table saws, band saws, and jointers: circular saws must be guarded by a hood that completely encloses the blade above the table and equipped with a spreader and anti-kickback fingers, so operators are protected from blade contact and from kickback of the workpiece. Regulation text (verbatim, 29 CFR 1910.213(c)(1)): Each circular hand-fed ripsaw shall be guarded by a hood which shall completely enclose that portion of the saw above the table and that portion of the saw above the material being cut. ### 29 CFR 1910.215: Abrasive Wheel Machinery URL: https://hazcomfast.com/osha-standard/1910-215-abrasive-wheel-machinery 29 CFR 1910.215 governs abrasive-wheel machinery such as bench and pedestal grinders: wheels must have a safety guard, the work rest must stay within 1/8 inch of the wheel, the adjustable tongue guard within 1/4 inch, and wheels must be ring-tested for cracks before mounting. Those two small clearances are what OSHA actually cites. Regulation text (verbatim, 29 CFR 1910.215(a)(4)): Work rests shall be kept adjusted closely to the wheel with a maximum opening of one-eighth inch to prevent the work from being jammed between the wheel and the rest, which may cause wheel breakage. ### 29 CFR 1910.217: Mechanical Power Presses URL: https://hazcomfast.com/osha-standard/1910-217-mechanical-power-presses 29 CFR 1910.217 governs mechanical power presses: the employer must provide and ensure the use of a point-of-operation guard or a properly applied point-of-operation device on every press operation, so a worker's hands cannot enter the die. It also requires safeguarding of the controls, brake monitoring, and reporting of point-of-operation injuries to OSHA. Regulation text (verbatim, 29 CFR 1910.217(c)(1)(i)): It shall be the responsibility of the employer to provide and insure the usage of "point of operation guards" or properly applied and adjusted point of operation devices on every operation performed on a mechanical power press. ### 29 CFR 1910.219: Mechanical Power-Transmission Apparatus URL: https://hazcomfast.com/osha-standard/1910-219-mechanical-power-transmission 29 CFR 1910.219 requires guarding of mechanical power-transmission apparatus: belts, pulleys, shafts, couplings, gears, sprockets, chains and flywheels must be enclosed or guarded. The trigger differs by component: pulleys and horizontal shafting are caught when any part sits seven feet or less from the floor or working platform (1910.219(d)(1) and (c)(2)(i)), while gears must be guarded whatever their height (1910.219(f)(1)); sprockets and chains, by contrast, are enclosed under (f)(3) unless they sit more than seven feet above the floor or platform. Regulation text (verbatim, 29 CFR 1910.219(c)(2)(i)): All exposed parts of horizontal shafting seven (7) feet or less from floor or working platform, excepting runways used exclusively for oiling, or running adjustments, shall be protected by a stationary casing enclosing shafting completely or by a trough enclosing sides and top or sides and bottom of shafting as location requires. ### 29 CFR 1910.242: Hand and Portable Powered Tools and Equipment – General URL: https://hazcomfast.com/osha-standard/1910-242-hand-portable-tools 29 CFR 1910.242 sets the general requirements for hand and portable powered tools in general industry: the employer is responsible for the safe condition of all tools used by employees, including those the employees furnish, and compressed air used for cleaning must be reduced to less than 30 psi and used with chip guarding and PPE. Regulation text (verbatim, 29 CFR 1910.242(a)): Each employer shall be responsible for the safe condition of tools and equipment used by employees, including tools and equipment which may be furnished by employees. ### 29 CFR 1910.243: Guarding of Portable Powered Tools URL: https://hazcomfast.com/osha-standard/1910-243-guarding-portable-power-tools 29 CFR 1910.243 sets guarding requirements for portable powered tools in general industry. It requires guards on the hazardous parts of handheld tools, for example, portable circular saws with a blade over 2 inches must have guards above and below the base plate, abrasive grinders need wheel guards, and belt sanders must be guarded, so the moving blade, wheel, or belt cannot contact the operator. Regulation text (verbatim, 29 CFR 1910.243(a)(1)(i)): All portable, power-driven circular saws having a blade diameter greater than 2 in. shall be equipped with guards above and below the base plate or shoe. ### 29 CFR 1910.244: Other Portable Tools and Equipment URL: https://hazcomfast.com/osha-standard/1910-244-other-portable-tools 29 CFR 1910.244 covers "other portable tools and equipment" not addressed by the portable-power-tool guarding standard: principally jacks (lever, ratchet, screw, and hydraulic) and abrasive blasting operations. For jacks, it requires that the operator ensure the jack has a rating sufficient for the load, that the rated load be marked on the jack, and that jacks be used and maintained safely; it also addresses abrasive blasting equipment. Regulation text (verbatim, 29 CFR 1910.244(a)(1)(i)): The operator shall make sure that the jack used has a rating sufficient to lift and sustain the load. ### 29 CFR 1910.252: General Requirements for Welding, Cutting, and Brazing URL: https://hazcomfast.com/osha-standard/1910-252-welding-general 29 CFR 1910.252 sets the general requirements for welding, cutting, and brazing: fire prevention and hot-work precautions (a fire watch, moving or shielding combustibles), ventilation or respiratory protection against fumes, and protection from arc radiation and hot metal. It underlies the process-specific arc and gas welding standards. Regulation text (verbatim, 29 CFR 1910.252(a)(2)(iii)(A)–(B): Fire watch): Fire watchers shall be required whenever welding or cutting is performed in locations where other than a minor fire might develop, or any of the following conditions exist: … A fire watch shall be maintained for at least a half hour after completion of welding or cutting operations to detect and extinguish possible smoldering fires. ### 29 CFR 1910.253: Oxygen-Fuel Gas Welding and Cutting URL: https://hazcomfast.com/osha-standard/1910-253-oxygen-fuel-gas-welding 29 CFR 1910.253 governs oxygen-fuel gas welding and cutting: compressed-gas cylinders must be stored upright and secured, oxygen and fuel-gas cylinders kept separated (by 20 feet or a firewall), regulators and hoses maintained, and cylinders handled to prevent leaks and impact. It controls the storage and handling hazards of oxy-acetylene work. Regulation text (verbatim, 29 CFR 1910.253(b)(4)(iii)): Oxygen cylinders in storage shall be separated from fuel-gas cylinders or combustible materials (especially oil or grease), a minimum distance of 20 feet (6.1 m) or by a noncombustible barrier at least 5 feet (1.5 m) high having a fire-resistance rating of at least one-half hour. ### 29 CFR 1910.254: Arc Welding and Cutting URL: https://hazcomfast.com/osha-standard/1910-254-arc-welding 29 CFR 1910.254 sets the safety requirements for arc welding and cutting in general industry. It covers selecting welding equipment of a safe, approved design, installing and grounding it safely, maintaining electrode holders and cables in good condition, and operating safely, with the operator required to report any equipment defect or safety hazard and stop using the equipment until it is made safe. Regulation text (verbatim, 29 CFR 1910.254(d)): The operator should report any equipment defect or safety hazard to his supervisor and the use of the equipment shall be discontinued until its safety has been assured. ### 29 CFR 1910.261: Pulp, Paper, and Paperboard Mills URL: https://hazcomfast.com/osha-standard/1910-261-pulp-paper-mills 29 CFR 1910.261 is the vertical safety standard for pulp, paper, and paperboard mills. It applies to establishments where pulp, paper, and paperboard are manufactured and converted, and it covers the industry's characteristic hazards: machine guarding on rolls and calenders, chemical exposures (chlorine, chlorine dioxide, digester liquors), steam and pressure, and confined spaces like digesters and tanks. Regulation text (summary, 29 CFR 1910.261(a)(1)): This section applies to establishments where pulp, paper, and paperboard are manufactured and converted. This section does not apply to logging and the transportation of logs to pulp, paper, and paperboard mills. ### 29 CFR 1910.263: Bakery Equipment URL: https://hazcomfast.com/osha-standard/1910-263-bakery-equipment 29 CFR 1910.263 is the special-industry standard for bakery equipment. It applies to the design, installation, operation, and maintenance of machinery and equipment used within a bakery (including mixers, dough brakes and sheeters, dividers, moulders, and ovens) and requires guarding and safeguards to protect workers from the amputation, burn, and caught-in hazards of that machinery. Regulation text (verbatim, 29 CFR 1910.263(a)(1)): The requirements of this section shall apply to the design, installation, operation and maintenance of machinery and equipment used within a bakery. ### 29 CFR 1910.265: Sawmills URL: https://hazcomfast.com/osha-standard/1910-265-sawmills 29 CFR 1910.265 is the special-industry standard for sawmills. It requires that buildings, docks, tramways, walkways, log dumps, and other structures be designed and maintained to carry their loads with a safety factor, and it sets requirements for guarding saws and machinery, safe log and lumber handling, and the layout of the mill: addressing the crushing, struck-by, and amputation hazards of sawmill work. Regulation text (verbatim, 29 CFR 1910.265(c)(1)): All buildings, docks, tramways, walkways, log dumps, and other structures shall be designed, constructed and maintained so as to support the imposed load in accordance with a safety factor. ### 29 CFR 1910.266: Logging Operations URL: https://hazcomfast.com/osha-standard/1910-266-logging-operations 29 CFR 1910.266 is the logging standard, establishing safety practices, means, methods, and operations for all types of logging regardless of the end use of the wood. It covers manual and mechanical felling, limbing, bucking, and yarding, and requires personal protective equipment (including leg protection and head, eye, and hearing protection for chainsaw operators), first-aid provisions, and training for a job that is consistently among the most dangerous in the country. Regulation text (verbatim, 29 CFR 1910.266(b)(1)): This standard establishes safety practices, means, methods and operations for all types of logging, regardless of the end use of the wood. ### 29 CFR 1910.268: Telecommunications URL: https://hazcomfast.com/osha-standard/1910-268-telecommunications 29 CFR 1910.268 sets the safety and health standards for telecommunications work: the conditions, practices, methods, and operations at telecommunications centers and field installations. It covers the industry's characteristic hazards: climbing and working aloft on poles and structures, entering manholes and other confined spaces, working with cables and pressurized lines, and electrical hazards including contact with power lines. Regulation text (verbatim, 29 CFR 1910.268(a)(1)): This section sets forth safety and health standards that apply to the work conditions, practices, means, methods, operations, installations and processes performed at telecommunications centers and at telecommunications field installations, which are located outdoors or in building spaces used for such field installations. ### 29 CFR 1910.269: Electric Power Generation, Transmission, and Distribution URL: https://hazcomfast.com/osha-standard/1910-269-electric-power-generation 29 CFR 1910.269 covers the operation and maintenance of electric power generation, control, transformation, transmission, and distribution lines and equipment. It sets the safety rules for utility electrical workers: de-energizing and grounding, minimum approach distances to energized parts, protection from electric arcs (arc-flash), work on or near live lines, and the training and procedures for high-voltage work. Regulation text (summary, 29 CFR 1910.269(a)(1)(i)): This section covers the operation and maintenance of electric power generation, control, transformation, transmission, and distribution lines and equipment. ### 29 CFR 1910.303: Electrical – General Requirements URL: https://hazcomfast.com/osha-standard/1910-303-electrical-general 29 CFR 1910.303 sets the general electrical requirements for general industry: electrical equipment must be approved (listed or labeled by a nationally recognized testing laboratory), installed and used per its listing, and live parts operating at 50 volts or more must be guarded against accidental contact. 'Approved' is a term of art, not a judgment call. Regulation text (verbatim, 29 CFR 1910.303(a)): The conductors and equipment required or permitted by this subpart shall be acceptable only if approved, as defined in § 1910.399. ### 29 CFR 1910.304: Wiring Design and Protection URL: https://hazcomfast.com/osha-standard/1910-304-wiring-design 29 CFR 1910.304 sets the wiring design and protection requirements for general industry: the path to ground from circuits, equipment, and enclosures must be permanent, continuous, and effective, receptacles in higher-risk locations such as bathrooms and rooftops must have ground-fault circuit interrupter (GFCI) protection, and circuits must have proper overcurrent protection. Regulation text (verbatim, 29 CFR 1910.304(g)(5)): The path to ground from circuits, equipment, and enclosures shall be permanent, continuous, and effective. ### 29 CFR 1910.305: Wiring Methods, Components, and Equipment URL: https://hazcomfast.com/osha-standard/1910-305-electrical-wiring 29 CFR 1910.305 governs wiring methods, components, and equipment in general industry: flexible cords may not substitute for fixed wiring, conductors must be spliced and enclosed in approved boxes, and equipment must be properly grounded. It is where OSHA cites the everyday extension-cord and open-box hazards. Regulation text (verbatim, 29 CFR 1910.305(g)(1)(iv)): Unless specifically permitted otherwise..., flexible cords and cables may not be used: (A) As a substitute for the fixed wiring of a structure; (B) Where run through holes in walls, ceilings, or floors; (C) Where run through doorways, windows, or similar openings; (D) Where attached to building surfaces; [or] (E) Where concealed behind building walls, ceilings, or floors. ### 29 CFR 1910.331: Electrical Safety-Related Work Practices – Scope URL: https://hazcomfast.com/osha-standard/1910-331-electrical-safety-work-practices 29 CFR 1910.331 is the scope section for OSHA's general-industry electrical safety-related work practices (1910.331 through 1910.335). It establishes that those rules cover both qualified persons (trained to avoid electrical hazards near exposed energized parts) and unqualified persons (with little or no such training) who work on, near, or with electrical installations: the foundation for the de-energizing, lockout, and safe-practice requirements that follow. Regulation text (summary, 29 CFR 1910.331(a)): The provisions of §§1910.331 through 1910.335 cover electrical safety-related work practices for both qualified persons (those who have training in avoiding the electrical hazards of working on or near exposed energized parts) and unqualified persons (those with little or no such training) working on, near, or with the following installations: ### 29 CFR 1910.332: Electrical Safety Training URL: https://hazcomfast.com/osha-standard/1910-332-electrical-training 29 CFR 1910.332 requires employers to train workers who face a risk of electric shock in the safety-related work practices of 1910.331 through 1910.335. Both qualified persons (who work on or near exposed energized parts) and certain unqualified persons must be trained in the practices that pertain to their specific job assignments. Regulation text (verbatim, 29 CFR 1910.332(b)(1)): Employees shall be trained in and familiar with the safety-related work practices required by §§ 1910.331 through 1910.335 that pertain to their respective job assignments. ### 29 CFR 1910.333: Selection and Use of Work Practices URL: https://hazcomfast.com/osha-standard/1910-333-selection-use-work-practices 29 CFR 1910.333 sets the safety-related work practices for electrical work: conductors and parts must be de-energized before work unless de-energizing introduces a greater hazard or is infeasible, and de-energized parts must be locked out and verified dead. Working live is the exception, not the norm, and requires specific precautions. Regulation text (verbatim, 29 CFR 1910.333(a)(1)): Live parts to which an employee may be exposed shall be deenergized before the employee works on or near them, unless the employer can demonstrate that deenergizing introduces additional or increased hazards or is infeasible due to equipment design or operational limitations. ### 29 CFR 1910.334: Use of Equipment URL: https://hazcomfast.com/osha-standard/1910-334-electrical-equipment-use 29 CFR 1910.334 sets safe work practices for using electrical equipment: portable cord-and-plug equipment must be visually inspected for damage before use, defective equipment must be removed from service, and workers must not use damaged cords, overload circuits, or handle energized equipment with wet hands. It covers the everyday use of tools and cords. Regulation text (verbatim, 29 CFR 1910.334(a)(2)(i)): Portable cord- and plug-connected equipment and flexible cord sets (extension cords) shall be visually inspected before use on any shift for external defects (such as loose parts, deformed and missing pins, or damage to outer jacket or insulation) and for evidence of possible internal damage (such as pinched or crushed outer jacket). ### 29 CFR 1910.1000: Air Contaminants (PEL Tables) URL: https://hazcomfast.com/osha-standard/1910-1000-air-contaminants 29 CFR 1910.1000 caps general-industry exposure to hundreds of air contaminants at the permissible exposure limits in its Z-Tables, and requires feasible engineering and work-practice controls to achieve those limits before respirators. Many of these PELs date to 1971 and are the legal floor, not a guarantee of safety. Regulation text (verbatim, 29 CFR 1910.1000(a)): An employee's exposure to any substance listed in Tables Z-1, Z-2, or Z-3 of this section shall be limited in accordance with the requirements of the following paragraphs of this section. ### 29 CFR 1910.1001: Asbestos (General Industry) URL: https://hazcomfast.com/osha-standard/1910-1001-asbestos 29 CFR 1910.1001 protects general-industry workers from asbestos, a confirmed carcinogen, capping exposure at a 0.1 fiber/cc 8-hour TWA with a 1 f/cc 30-minute excursion limit. It requires exposure monitoring, regulated areas, engineering controls, respirators, and medical surveillance, and the PEL is a legal ceiling, not a safe level. Regulation text (verbatim, 29 CFR 1910.1001(c)(1)): The employer shall ensure that no employee is exposed to an airborne concentration of asbestos in excess of 0.1 fiber per cubic centimeter of air as an eight (8)-hour time-weighted average (TWA). ### 29 CFR 1910.1003: 13 Carcinogens (4-Nitrobiphenyl, etc.) URL: https://hazcomfast.com/osha-standard/1910-1003-carcinogens 29 CFR 1910.1003 regulates 13 specific chemical carcinogens (including 4-nitrobiphenyl, alpha- and beta-naphthylamine, benzidine, and bis-chloromethyl ether) that are so hazardous the standard controls them not with an exposure limit but by confining them to regulated areas, requiring closed systems or strict controls, restricting access, and setting decontamination, labeling, and reporting rules. Regulation text (verbatim, 29 CFR 1910.1003(a)(1)): This section applies to any area in which the 13 carcinogens addressed by this section are manufactured, processed, repackaged, released, handled, or stored, but shall not apply to transshipment in sealed containers, except for the labeling requirements under paragraphs (e)(2), (3) and (4) of this section. ### 29 CFR 1910.1018: Inorganic Arsenic URL: https://hazcomfast.com/osha-standard/1910-1018-inorganic-arsenic 29 CFR 1910.1018 protects general-industry workers from inorganic arsenic, a carcinogen linked to lung and skin cancer found in copper smelting, glass, semiconductor, and pesticide and wood-treating operations. It caps exposure at 10 µg/m³ as an 8-hour TWA with a 5 µg/m³ action level, requiring monitoring, engineering controls, regulated areas, and medical surveillance. Regulation text (verbatim, 29 CFR 1910.1018(c)): The employer shall assure that no employee is exposed to inorganic arsenic at concentrations greater than 10 micrograms per cubic meter of air (10 µg/m3), averaged over any 8-hour period. ### 29 CFR 1910.1020: Access to Employee Exposure and Medical Records URL: https://hazcomfast.com/osha-standard/1910-1020-exposure-records 29 CFR 1910.1020 gives workers and their representatives the right to access their exposure and medical records, and sets how long those records must be kept: employee exposure records for at least 30 years, and medical records for the duration of employment plus 30 years. It is the retention backbone behind every substance-specific health standard. Regulation text (verbatim, 29 CFR 1910.1020(d)(1)(ii)): Each employee exposure record shall be preserved and maintained for at least thirty (30) years... ### 29 CFR 1910.1025: Lead (General Industry) URL: https://hazcomfast.com/osha-standard/1910-1025-lead 29 CFR 1910.1025 protects general-industry workers from lead, capping airborne exposure at a 50 µg/m³ 8-hour TWA with a 30 µg/m³ action level. It requires exposure monitoring, engineering controls, medical surveillance with blood-lead testing, and medical removal protection for workers whose blood-lead rises too high. Regulation text (verbatim, 29 CFR 1910.1025(c)(1)): The employer shall assure that no employee is exposed to lead at concentrations greater than fifty micrograms per cubic meter of air (50 µg/m3) averaged over an 8-hour period. ### 29 CFR 1910.1026: Chromium (VI) (Hexavalent Chromium) URL: https://hazcomfast.com/osha-standard/1910-1026-chromium-vi 29 CFR 1910.1026 protects general-industry workers from hexavalent chromium (Cr(VI)), a lung carcinogen, capping exposure at 5 µg/m³ as an 8-hour TWA with a 2.5 µg/m³ action level. Cr(VI) is often generated by welding or cutting stainless steel, not just handled as a chemical, so process operations must be assessed. Regulation text (verbatim, 29 CFR 1910.1026(c)): The employer shall ensure that no employee is exposed to an airborne concentration of chromium (VI) in excess of 5 micrograms per cubic meter of air (5 µg/m3), calculated as an 8-hour time-weighted average (TWA). ### 29 CFR 1910.1027: Cadmium (General Industry) URL: https://hazcomfast.com/osha-standard/1910-1027-cadmium 29 CFR 1910.1027 protects general-industry workers from cadmium, a kidney toxin and carcinogen, capping exposure at 5 µg/m³ as an 8-hour TWA with a 2.5 µg/m³ action level. Unusually, it tracks the body directly, biological monitoring of cadmium in blood and urine, and removes workers whose levels climb too high. Regulation text (verbatim, 29 CFR 1910.1027(c)): The employer shall assure that no employee is exposed to an airborne concentration of cadmium in excess of five micrograms per cubic meter of air (5 µg/m3), calculated as an eight-hour time-weighted average exposure (TWA). ### 29 CFR 1910.1028: Benzene URL: https://hazcomfast.com/osha-standard/1910-1028-benzene 29 CFR 1910.1028 protects general-industry workers from benzene, a carcinogen that causes leukemia, with three limits: a 1 ppm 8-hour TWA, a 5 ppm 15-minute STEL, and a 0.5 ppm action level. Medical surveillance built around the complete blood count is required above the action level. Regulation text (verbatim, 29 CFR 1910.1028(c)(1)): The employer shall assure that no employee is exposed to an airborne concentration of benzene in excess of one part of benzene per million parts of air (1 ppm) as an 8-hour time-weighted average. ### 29 CFR 1910.1029: Coke Oven Emissions URL: https://hazcomfast.com/osha-standard/1910-1029-coke-oven-emissions 29 CFR 1910.1029 protects steel-industry workers from coke oven emissions: the complex mixture of gases, vapors, and particulates released when coal is baked into coke. The emissions are carcinogenic (lung and kidney cancer). The standard caps exposure at 150 µg/m³ as an 8-hour TWA for workers in the regulated area, requiring engineering controls, monitoring, protective equipment, and medical surveillance. Regulation text (verbatim, 29 CFR 1910.1029(c)): The employer shall assure that no employee in the regulated area is exposed to coke oven emissions at concentrations greater than 150 micrograms per cubic meter of air (150 µg/m3), averaged over any 8-hour period. ### 29 CFR 1910.1030: Bloodborne Pathogens URL: https://hazcomfast.com/osha-standard/1910-1030-bloodborne-pathogens 29 CFR 1910.1030 protects workers with occupational exposure to blood or other potentially infectious material from bloodborne pathogens such as HIV and hepatitis B and C. It requires a written exposure control plan, universal precautions, engineering and work-practice controls, free hepatitis B vaccination, and post-exposure evaluation and follow-up. Regulation text (verbatim, 29 CFR 1910.1030(b): Occupational Exposure): Occupational Exposure means reasonably anticipated skin, eye, mucous membrane, or parenteral contact with blood or other potentially infectious materials that may result from the performance of an employee's duties. ### 29 CFR 1910.1043: Cotton Dust URL: https://hazcomfast.com/osha-standard/1910-1043-cotton-dust 29 CFR 1910.1043 protects textile workers from cotton dust, which causes byssinosis (brown lung): a disabling respiratory disease. For yarn manufacturing it caps exposure at 200 µg/m³ of lint-free respirable cotton dust as an 8-hour TWA (higher limits apply to slashing and weaving and to waste processing), requiring monitoring, engineering controls, respirators, and medical surveillance with pulmonary function testing. Regulation text (verbatim, 29 CFR 1910.1043(c)(1)(i)): The employer shall assure that no employee who is exposed to cotton dust in yarn manufacturing and cotton washing operations is exposed to airborne concentrations of lint-free respirable cotton dust greater than 200 µg/m3 mean concentration, averaged over an eight-hour period, as measured be [sic] a vertical elutriator or an equivalent instrument. ### 29 CFR 1910.1044: 1,2-dibromo-3-chloropropane (DBCP) URL: https://hazcomfast.com/osha-standard/1910-1044-dbcp 29 CFR 1910.1044 protects general-industry workers from 1,2-dibromo-3-chloropropane (DBCP), a former pesticide that is a carcinogen and a reproductive toxin known to cause male sterility. It caps exposure at 1 ppb as an 8-hour TWA, requiring monitoring, engineering controls, regulated areas, protective equipment, and medical surveillance including reproductive evaluation. Regulation text (verbatim, 29 CFR 1910.1044(c)(1)): The employer shall assure that no employee is exposed to an airborne concentration of DBCP in excess of 1 part DBCP per billion parts of air (ppb) as an 8-hour time-weighted average. ### 29 CFR 1910.1045: Acrylonitrile URL: https://hazcomfast.com/osha-standard/1910-1045-acrylonitrile 29 CFR 1910.1045 protects general-industry workers from acrylonitrile (AN, or vinyl cyanide), a carcinogen used to make acrylic fibers, ABS and SAN plastics, and nitrile rubber. It caps exposure at 2 ppm as an 8-hour TWA with a 10 ppm 15-minute ceiling and a 1 ppm action level, requiring monitoring, controls, regulated areas, and medical surveillance. Regulation text (verbatim, 29 CFR 1910.1045(c)(1)): The employer shall assure that no employee is exposed to an airborne concentration of acrylonitrile in excess of two (2) parts acrylonitrile per million parts of air (2 ppm) as an eight (8)-hour time-weighted average. ### 29 CFR 1910.1047: Ethylene Oxide URL: https://hazcomfast.com/osha-standard/1910-1047-ethylene-oxide 29 CFR 1910.1047 protects general-industry workers from ethylene oxide (EtO), a carcinogenic and reproductive-hazard gas used to sterilize medical devices and in chemical manufacturing. It caps exposure at 1 ppm as an 8-hour TWA with a 5 ppm 15-minute excursion limit and a 0.5 ppm action level, requiring monitoring, controls, regulated areas, and medical surveillance. Regulation text (verbatim, 29 CFR 1910.1047(c)(1)): The employer shall ensure that no employee is exposed to an airborne concentration of EtO in excess of one (1) part EtO per million parts of air (1 ppm) as an 8-hour time-weighted average (8-hour TWA). ### 29 CFR 1910.1048: Formaldehyde URL: https://hazcomfast.com/osha-standard/1910-1048-formaldehyde 29 CFR 1910.1048 protects general-industry workers from formaldehyde, both a carcinogen and a respiratory and skin sensitizer, with a 0.75 ppm 8-hour TWA, a 2 ppm STEL, and a 0.5 ppm action level. Exposure often comes from formalin solutions and resins, not just pure gas. Regulation text (verbatim, 29 CFR 1910.1048(c)(1)): The employer shall assure that no employee is exposed to an airborne concentration of formaldehyde which exceeds 0.75 parts formaldehyde per million parts of air (0.75 ppm) as an 8-hour TWA. ### 29 CFR 1910.1050: Methylenedianiline (MDA) URL: https://hazcomfast.com/osha-standard/1910-1050-methylenedianiline 29 CFR 1910.1050 protects general-industry workers from 4,4'-methylenedianiline (MDA), a curing agent in epoxy resins and a carcinogen and liver toxin that is readily absorbed through the skin. It caps exposure at 10 ppb as an 8-hour TWA with a 100 ppb 15-minute STEL and a 5 ppb action level, requiring monitoring, controls, skin protection, and medical surveillance. Regulation text (verbatim, 29 CFR 1910.1050(c)): The employer shall assure that no employee is exposed to an airborne concentration of MDA in excess of ten parts per billion (10 ppb) as an 8-hour time-weighted average or a STEL of 100 ppb. ### 29 CFR 1910.1051: 1,3-Butadiene URL: https://hazcomfast.com/osha-standard/1910-1051-butadiene 29 CFR 1910.1051 protects general-industry workers from 1,3-butadiene (BD), a gas used to make synthetic rubber and plastics and a carcinogen linked to leukemia. It caps exposure at 1 ppm as an 8-hour TWA with a 5 ppm 15-minute STEL and a 0.5 ppm action level, requiring monitoring, controls, regulated areas, and medical surveillance. Regulation text (verbatim, 29 CFR 1910.1051(c)(1)): The employer shall ensure that no employee is exposed to an airborne concentration of BD in excess of one (1) part BD per million parts of air (ppm) measured as an eight (8)-hour time-weighted average. ### 29 CFR 1910.1052: Methylene Chloride URL: https://hazcomfast.com/osha-standard/1910-1052-methylene-chloride 29 CFR 1910.1052 protects general-industry workers from methylene chloride (dichloromethane, or MC), a solvent that is a carcinogen and metabolizes to carbon monoxide, stressing the heart. It caps exposure at 25 ppm as an 8-hour TWA with a 125 ppm 15-minute STEL and a 12.5 ppm action level, requiring monitoring, controls, and medical surveillance. Regulation text (verbatim, 29 CFR 1910.1052(c)(1)): The employer shall ensure that no employee is exposed to an airborne concentration of MC in excess of twenty-five parts of MC per million parts of air (25 ppm) as an 8-hour TWA. ### 29 CFR 1910.1053: Respirable Crystalline Silica (General Industry) URL: https://hazcomfast.com/osha-standard/1910-1053-silica-general-industry 29 CFR 1910.1053 protects general-industry and maritime workers from respirable crystalline silica, capping exposure at 50 µg/m³ as an 8-hour TWA with a 25 µg/m³ action level. Unlike construction, it has no Table 1: employers must assess each worker's exposure and control it to the PEL, with medical surveillance above the action level. Regulation text (verbatim, 29 CFR 1910.1053(c)): The employer shall ensure that no employee is exposed to an airborne concentration of respirable crystalline silica in excess of 50 µg/m3, calculated as an 8-hour TWA. ### 29 CFR 1910.1200: Hazard Communication Standard (HazCom) URL: https://hazcomfast.com/osha-standard/1910-1200-hazard-communication 29 CFR 1910.1200, the Hazard Communication Standard (HazCom), is OSHA's chemical right-to-know rule: employers must classify the hazards of the chemicals they use and communicate them through a written program, GHS-aligned container labels, Safety Data Sheets, and worker training. It was second on OSHA's list of most-cited standards for FY2025. Regulation text (verbatim, 29 CFR 1910.1200(e)(1)): Employers shall develop, implement, and maintain at each workplace, a written hazard communication program which at least describes how the criteria specified in paragraphs (f), (g), and (h) of this section for labels and other forms of warning, safety data sheets, and employee information and training will be met, and which also includes the following: (i) A list of the hazardous chemicals known to be present using a product identifier that is referenced on the appropriate safety data sheet (the list may be compiled for the workplace as a whole or for individual work areas); and, (ii) The methods the employer will use to inform employees of the hazards of non-routine tasks (for example, the cleaning of reactor vessels), and the hazards associated with chemicals contained in unlabeled pipes in their work areas. ### 29 CFR 1910.95: Occupational Noise Exposure URL: https://hazcomfast.com/osha-standard/1910-95-occupational-noise-exposure 29 CFR 1910.95 limits occupational noise to a 90 dBA permissible exposure limit as an 8-hour time-weighted average, and requires a hearing conservation program (noise monitoring, annual audiograms, hearing protectors, and training) for workers exposed at or above an 85 dBA action level. Regulation text (verbatim, 29 CFR 1910.95(a)): Protection against the effects of noise exposure shall be provided when the sound levels exceed those shown in Table G-16 when measured on the A scale of a standard sound level meter at slow response. ### 29 CFR 1904.4: Recording Criteria for Cases URL: https://hazcomfast.com/osha-standard/1904-4-recording-criteria 29 CFR 1904.4 is the gateway rule for OSHA injury and illness recordkeeping: an employer that must keep records has to record every case that is (1) work-related, (2) a new case, and (3) meets the general recording criteria of §1904.7 or the specific-case rules of §§1904.8–1904.12. If all three are true, the case goes on the OSHA 300 Log. Regulation text (verbatim, 29 CFR 1904.4(a)): Each employer required by this part to keep records of fatalities, injuries, and illnesses must record each fatality, injury and illness that: (1) Is work-related; and (2) Is a new case; and (3) Meets one or more of the general recording criteria of §1904.7 or the application to specific cases of §§1904.8 through 1904.12. ### 29 CFR 1904.5: Determination of Work-Relatedness URL: https://hazcomfast.com/osha-standard/1904-5-work-relatedness 29 CFR 1904.5 defines when an injury or illness counts as work-related for OSHA recordkeeping. It is work-related if an event or exposure in the work environment caused or contributed to the condition, or significantly aggravated a pre-existing one. Work-relatedness is presumed for anything arising in the work environment unless one of the specific exceptions in §1904.5(b)(2) applies. Regulation text (verbatim, 29 CFR 1904.5(a)): You must consider an injury or illness to be work-related if an event or exposure in the work environment either caused or contributed to the resulting condition or significantly aggravated a pre-existing injury or illness. Work-relatedness is presumed for injuries and illnesses resulting from events or exposures occurring in the work environment, unless an exception in §1904.5(b)(2) specifically applies. ### 29 CFR 1904.7: General Recording Criteria for Cases URL: https://hazcomfast.com/osha-standard/1904-7-general-recording-criteria 29 CFR 1904.7 sets the general recording criteria: the "what happened?" prong of recordability. A work-related, new case is recordable if it results in death, days away from work, restricted work or transfer to another job, medical treatment beyond first aid, or loss of consciousness, or if it is a significant injury or illness diagnosed by a physician or other licensed health care professional. Regulation text (verbatim, 29 CFR 1904.7(a)): You must consider an injury or illness to meet the general recording criteria, and therefore to be recordable, if it results in any of the following: death, days away from work, restricted work or transfer to another job, medical treatment beyond first aid, or loss of consciousness. You must also consider a case to meet the general recording criteria if it involves a significant injury or illness diagnosed by a physician or other licensed health care professional, even if it does not result in death, days away from work, restricted work or job transfer, medical treatment beyond first aid, or loss of consciousness. ### 29 CFR 1904.29: OSHA Forms 300, 300A, and 301 URL: https://hazcomfast.com/osha-standard/1904-29-forms 29 CFR 1904.29 specifies the forms of the recordkeeping system: employers must use the OSHA 300 Log of Work-Related Injuries and Illnesses, the 300-A annual summary, and the 301 Incident Report, or equivalent forms. It sets a 7-calendar-day deadline to enter a recordable case and creates "privacy concern case" rules that keep certain employees' names off the shared Log. Regulation text (verbatim, 29 CFR 1904.29(a)): You must use OSHA 300, 300-A, and 301 forms, or equivalent forms, for recordable injuries and illnesses. ### 29 CFR 1904.30: Multiple Business Establishments URL: https://hazcomfast.com/osha-standard/1904-30-multiple-business-establishments 29 CFR 1904.30 tells an employer with more than one establishment which OSHA 300 Log each case goes on. An establishment expected to operate for a year or longer keeps its own log. Short-term establishments still keep records but can share one log, and every employee is linked to one establishment so no case falls between logs. Regulation text (verbatim, 29 CFR 1904.30(a)): You must keep a separate OSHA 300 Log for each establishment that is expected to be in operation for one year or longer. Texts re-read against the eCFR on September 30, 2026. ### 29 CFR 1904.32: Annual Summary (OSHA 300A) URL: https://hazcomfast.com/osha-standard/1904-32-annual-summary 29 CFR 1904.32 governs the year-end 300-A summary. At the end of each calendar year an employer must review the OSHA 300 Log for accuracy, create the 300-A annual summary of that year's cases, have a company executive certify it, and post the 300-A where notices are usually posted, from February 1 through April 30 of the following year. Regulation text (verbatim, 29 CFR 1904.32(a)): At the end of each calendar year, you must: (1) Review the OSHA 300 Log to verify that the entries are complete and accurate, and correct any deficiencies identified; (2) Create an annual summary of injuries and illnesses recorded on the OSHA 300 Log; (3) Certify the summary; and (4) Post the annual summary. ### 29 CFR 1904.33: Retention and Updating of Records URL: https://hazcomfast.com/osha-standard/1904-33-employee-retention-records 29 CFR 1904.33 sets how long injury records must be kept and updated. Employers must retain the OSHA 300 Log, the privacy case list, the 300-A annual summary, and the 301 Incident Reports for five years after the end of the calendar year the records cover, and must update the stored 300 Log (though not the 300-A or 301) if they later learn of a new recordable case or a change to a recorded one. Regulation text (verbatim, 29 CFR 1904.33(a)): You must save the OSHA 300 Log, the privacy case list (if one exists), the annual summary, and the OSHA 301 Incident Report forms for five (5) years following the end of the calendar year that these records cover. ### 29 CFR 1904.35: Employee Involvement URL: https://hazcomfast.com/osha-standard/1904-35-employee-involvement 29 CFR 1904.35 brings employees into the injury records in two ways. You must have a reasonable procedure for reporting work-related injuries and illnesses, tell every employee about it and about their right to report, and never retaliate for a report. And employees, former employees and their representatives can get a copy of the OSHA 300 Log by the end of the next business day. Regulation text (verbatim, 29 CFR 1904.35(b)(1)(i)): You must establish a reasonable procedure for employees to report work-related injuries and illnesses promptly and accurately. A procedure is not reasonable if it would deter or discourage a reasonable employee from accurately reporting a workplace injury or illness Texts re-read against the eCFR on September 30, 2026. ### 29 CFR 1904.41: Electronic Submission of Injury and Illness Data (ITA) URL: https://hazcomfast.com/osha-standard/1904-41-electronic-reporting 29 CFR 1904.41 requires certain employers to electronically submit their injury and illness records to OSHA through the Injury Tracking Application (ITA). Establishments with 250 or more employees, and those with 20–249 employees in designated higher-hazard industries, must submit their OSHA Form 300A summary data by March 2 each year; the largest high-hazard establishments must also submit their 300 Log and 301 Incident Report data. Regulation text (verbatim, 29 CFR 1904.41(a)(1)(ii)): If your establishment had 250 or more employees at any time during the previous calendar year, and this part requires your establishment to keep records, then you must electronically submit information from OSHA Form 300A. ### 29 CFR 1904.40: Providing Records to Government Representatives URL: https://hazcomfast.com/osha-standard/1904-40-employee-access 29 CFR 1904.40 requires employers to give an authorized government representative copies of the records they keep under Part 1904 within four business hours of the request. The representatives are OSHA, HHS including NIOSH, and a State Plan agency. Texts re-read against the eCFR on September 30, 2026. ### 29 CFR 1926.20: General Safety and Health Provisions (Construction) URL: https://hazcomfast.com/osha-standard/1926-20-general-safety-health 29 CFR 1926.20 sets the general safety and health provisions for construction: employers must initiate and maintain an accident-prevention program that includes frequent and regular inspections of the jobsite, materials, and equipment by a competent person, and must let only trained, qualified workers operate equipment. It is the umbrella duty behind the specific 1926 standards. Regulation text (verbatim, 29 CFR 1926.20(b)(2)): Such programs shall provide for frequent and regular inspections of the job sites, materials, and equipment to be made by competent persons designated by the employers. ### 29 CFR 1926.21: Safety Training and Education (Construction) URL: https://hazcomfast.com/osha-standard/1926-21-safety-training-education 29 CFR 1926.21 is the general construction safety-training requirement: the employer must instruct each employee in the recognition and avoidance of unsafe conditions and in the regulations applicable to their work environment, and must train workers who handle hazardous substances or enter hazardous areas in the specific precautions involved. Regulation text (verbatim, 29 CFR 1926.21(b)(2)): The employer shall instruct each employee in the recognition and avoidance of unsafe conditions and the regulations applicable to his work environment to control or eliminate any hazards or other exposure to illness or injury. ### 29 CFR 1926.28: Personal Protective Equipment (Construction) URL: https://hazcomfast.com/osha-standard/1926-28-ppe-construction 29 CFR 1926.28 is the general personal protective equipment requirement for construction. It makes the employer responsible for requiring the wearing of appropriate PPE in all operations where there is an exposure to hazardous conditions, or where Part 1926 indicates the need for it to reduce hazards to employees. It is the umbrella duty behind the specific PPE standards in Subpart E. Regulation text (verbatim, 29 CFR 1926.28(a)): The employer is responsible for requiring the wearing of appropriate personal protective equipment in all operations where there is an exposure to hazardous conditions or where this part indicates the need for using such equipment to reduce the hazards to the employees. ### 29 CFR 1926.32: Definitions (Construction) URL: https://hazcomfast.com/osha-standard/1926-32-definitions-construction 29 CFR 1926.32 provides the definitions of terms used throughout OSHA's construction standards (Part 1926). It fixes the meaning of foundational terms (most importantly "competent person" and "qualified person," which trigger specific duties across the construction standards) as well as "employer," "construction work," "authorized person," and others. These definitions determine who must do what across all of Part 1926. Regulation text (verbatim, 29 CFR 1926.32(f)): Competent person means one who is capable of identifying existing and predictable hazards in the surroundings or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them. ### 29 CFR 1926.50: Medical Services and First Aid (Construction) URL: https://hazcomfast.com/osha-standard/1926-50-medical-first-aid-construction 29 CFR 1926.50 requires that, where an infirmary, clinic, hospital, or physician is not reasonably accessible to the construction worksite, a person holding a valid first-aid certificate be available on site to render first aid. It also requires first-aid supplies, provisions for injured-worker transport, and quick-drench facilities where corrosive materials are used. Regulation text (verbatim, 29 CFR 1926.50(c)): In the absence of an infirmary, clinic, hospital, or physician, that is reasonably accessible in terms of time and distance to the worksite, which is available for the treatment of injured employees, a person who has a valid certificate in first-aid training from the U.S. Bureau of Mines, the American Red Cross, or equivalent training that can be verified by documentary evidence, shall be available at the worksite to render first aid. ### 29 CFR 1926.51: Sanitation (Construction) URL: https://hazcomfast.com/osha-standard/1926-51-sanitation-construction 29 CFR 1926.51 sets the sanitation requirements for construction sites: an adequate supply of potable drinking water, toilet facilities scaled to the number of workers, washing facilities, and strict separation of potable from non-potable water, so workers have clean water and hygiene on the jobsite. Regulation text (verbatim, 29 CFR 1926.51(a)(1)): An adequate supply of potable water shall be provided in all places of employment. ### 29 CFR 1926.52: Occupational Noise Exposure (Construction) URL: https://hazcomfast.com/osha-standard/1926-52-noise-construction 29 CFR 1926.52 limits construction workers' noise exposure to a 90 dBA permissible level as an 8-hour time-weighted average (Table D-2). When sound levels exceed the limits, feasible administrative or engineering controls must be used first, and hearing protection provided for the exposure those controls do not eliminate. Regulation text (verbatim, 29 CFR 1926.52(b)): When employees are subjected to sound levels exceeding those listed in Table D-2 of this section, feasible administrative or engineering controls shall be utilized. ### 29 CFR 1926.55: Gases, Vapors, Fumes, Dusts, and Mists (Construction) URL: https://hazcomfast.com/osha-standard/1926-55-gases-vapors-construction 29 CFR 1926.55 caps construction workers' exposure to gases, vapors, fumes, dusts, and mists at the permissible exposure limits in its Table 1 and Table 2, and requires feasible administrative or engineering controls before respirators. It is the construction counterpart to general industry's 1910.1000, and most of its limits date to 1970. Regulation text (verbatim, 29 CFR 1926.55(a)(2)): An employee's exposure, as determined from breathing-zone air samples, to any substance in Table 1 or 2 of this section with a permissible exposure limit not preceded by (C) must not exceed the limit specified for that substance measured as an 8-hour time-weighted average in any work shift. ### 29 CFR 1926.57: Ventilation (Construction) URL: https://hazcomfast.com/osha-standard/1926-57-ventilation-construction 29 CFR 1926.57 sets the ventilation requirements for construction. Whenever hazardous substances (dusts, fumes, mists, vapors, or gases) exist or are produced during construction work, their concentrations must not exceed the exposure limits in 1926.55(a), and where ventilation is used as an engineering control, the system must be properly installed and operated. The standard includes specific requirements for abrasive blasting, grinding, and other high-exposure operations. Regulation text (verbatim, 29 CFR 1926.57(a)): Whenever hazardous substances such as dusts, fumes, mists, vapors, or gases exist or are produced in the course of construction work, their concentrations shall not exceed the limits specified in § 1926.55(a). When ventilation is used as an engineering control method, the system shall be installed and operated according to the requirements of this section. ### 29 CFR 1926.59: Hazard Communication (Construction) URL: https://hazcomfast.com/osha-standard/1926-59-hazcom-construction 29 CFR 1926.59 is a single note: the hazard communication requirements for construction work are identical to those in 29 CFR 1910.1200. There is no separate construction text, and citations follow suit. In federal construction inspections in fiscal year 2025, OSHA cited 1910.1200 698 times and 1926.59 14 times (HazComFast count from Labor Department enforcement data). A jobsite HazCom program is built to 1910.1200. Regulation text (summary, 29 CFR 1926.59): The requirements applicable to construction work under this section are identical to those set forth at § 1910.1200 of this chapter. Texts re-read against the eCFR on September 30, 2026. ### 29 CFR 1926.61: Retention of DOT Markings, Placards and Labels (Construction) URL: https://hazcomfast.com/osha-standard/1926-61-retention-of-dot-markings 29 CFR 1926.61 makes the rule of 1910.1201 apply to construction work. A package, freight container or vehicle that arrives marked, labeled or placarded under the DOT Hazardous Materials Regulations keeps those markings until the hazard is gone. For a non-bulk package that won't be reshipped, a label under the Hazard Communication Standard meets the rule. Regulation text (verbatim, 29 CFR 1910.1201(a)): Any employer who receives a package of hazardous material which is required to be marked, labeled or placarded in accordance with the U. S. Department of Transportation's Hazardous Materials Regulations (49 CFR Parts 171 through 180) shall retain those markings, labels and placards on the package until the packaging is sufficiently cleaned of residue and purged of vapors to remove any potential hazards. Texts re-read against the eCFR on September 30, 2026. ### 29 CFR 1926.62: Lead Exposure in Construction URL: https://hazcomfast.com/osha-standard/1926-62-lead-in-construction 29 CFR 1926.62 protects construction workers from lead, capping airborne exposure at a 50 µg/m³ 8-hour TWA with a 30 µg/m³ action level. Because certain 'trigger tasks' such as abrasive blasting, torch cutting, and welding on coated steel are presumed to overexpose, workers must be protected first and monitored to prove otherwise. Regulation text (verbatim, 29 CFR 1926.62(c)(1)): The employer shall assure that no employee is exposed to lead at concentrations greater than fifty micrograms per cubic meter of air (50 µg/m3) averaged over an 8-hour period. ### 29 CFR 1926.95: Criteria for PPE (Construction) URL: https://hazcomfast.com/osha-standard/1926-95-ppe-criteria 29 CFR 1926.95 is the general PPE standard for construction: protective equipment for the eyes, face, head, extremities, body, and respiratory system must be provided, used, and maintained wherever hazards make it necessary. Since a 2024 amendment, that PPE must also properly fit each affected worker: ill-fitting PPE is now itself a violation. Regulation text (verbatim, 29 CFR 1926.95(a)): Protective equipment, including personal protective equipment for eyes, face, head, and extremities, protective clothing, respiratory devices, and protective shields and barriers, shall be provided, used, and maintained in a sanitary and reliable condition wherever it is necessary by reason of hazards of processes or environment, chemical hazards, radiological hazards, or mechanical irritants encountered in a manner capable of causing injury or impairment in the function of any part of the body through absorption, inhalation or physical contact. ### 29 CFR 1926.100: Head Protection (Construction) URL: https://hazcomfast.com/osha-standard/1926-100-head-protection-construction 29 CFR 1926.100 requires construction workers to wear ANSI Z89.1-compliant head protection wherever there is a danger of head injury from falling or flying objects or from electrical contact. The helmet's class must match the hazard: a conductive Class C hard hat provides no electrical protection. Regulation text (verbatim, 29 CFR 1926.100(a)): Employees working in areas where there is a possible danger of head injury from impact, or from falling or flying objects, or from electrical shock and burns, shall be protected by protective helmets. ### 29 CFR 1926.102: Eye and Face Protection (Construction) URL: https://hazcomfast.com/osha-standard/1926-102-eye-face-protection-construction 29 CFR 1926.102 requires ANSI Z87.1-compliant eye and face protection for construction workers exposed to flying particles, molten metal, liquid chemicals, gases or vapors, or injurious light. The specific hazard picks the device: safety glasses with side shields, chemical goggles, or a face shield with the correct filter shade. Regulation text (verbatim, 29 CFR 1926.102(a)(1)): The employer shall ensure that each affected employee uses appropriate eye or face protection when exposed to eye or face hazards from flying particles, molten metal, liquid chemicals, acids or caustic liquids, chemical gases or vapors, or potentially injurious light radiation. ### 29 CFR 1926.150: Fire Protection (Construction) URL: https://hazcomfast.com/osha-standard/1926-150-fire-protection-construction 29 CFR 1926.150 requires each employer to develop a fire protection program followed throughout all phases of construction and demolition work, and to provide firefighting equipment, fire extinguishers and a water supply, as specified, without delay as fire hazards appear. It is the umbrella fire-safety duty for the jobsite. Regulation text (verbatim, 29 CFR 1926.150(a)(1)): The employer shall be responsible for the development of a fire protection program to be followed throughout all phases of the construction and demolition work, and he shall provide for the firefighting equipment as specified in this subpart. As fire hazards occur, there shall be no delay in providing the necessary equipment. ### 29 CFR 1926.152: Flammable Liquids (Construction) URL: https://hazcomfast.com/osha-standard/1926-152-flammable-liquids-construction 29 CFR 1926.152 governs flammable liquids on construction sites: they must be kept in approved safety cans or containers, storage quantities are limited, indoor storage and dispensing areas must be ventilated and free of ignition sources, and transfers must control static. It is the construction counterpart to general industry's 1910.106. Regulation text (verbatim, 29 CFR 1926.152(a)(1)): Only approved containers and portable tanks shall be used for storage and handling of flammable liquids. Approved safety cans or Department of Transportation approved containers shall be used for the handling and use of flammable liquids in quantities of 5 gallons or less... ### 29 CFR 1926.153: Liquefied Petroleum Gas (Construction) URL: https://hazcomfast.com/osha-standard/1926-153-lp-gas-construction 29 CFR 1926.153 governs liquefied petroleum gas (LP-gas, or propane) used on construction sites, for temporary heating, torches, and equipment. It requires that containers, valves, connectors, manifold assemblies, and regulators be of an approved type, and it sets rules for safe storage, container placement, protection from damage, and prevention of leaks and fire from this heavier-than-air, flammable gas. Regulation text (verbatim, 29 CFR 1926.153(a)(1)): Each system shall have containers, valves, connectors, manifold valve assemblies, and regulators of an approved type. ### 29 CFR 1926.200: Accident Prevention Signs and Tags (Construction) URL: https://hazcomfast.com/osha-standard/1926-200-signs-signals-construction 29 CFR 1926.200 governs the accident-prevention signs and signals used on construction sites: danger, caution, exit, safety-instruction, and traffic signs must be visible whenever the hazard they warn of is present, and removed or covered promptly when the hazard no longer exists, so warnings stay meaningful. Regulation text (verbatim, 29 CFR 1926.200(a)): Signs and symbols required by this subpart shall be visible at all times when work is being performed, and shall be removed or covered promptly when the hazards no longer exist. ### 29 CFR 1926.201: Signaling (Construction) URL: https://hazcomfast.com/osha-standard/1926-201-signaling-construction 29 CFR 1926.201 covers signaling: the use of flaggers to control traffic in construction work zones. It requires that signaling by flaggers, and the warning garments they wear, conform to Part 6 of the Manual on Uniform Traffic Control Devices (MUTCD), the national standard for temporary traffic control that makes flagging consistent and visible. Regulation text (verbatim, 29 CFR 1926.201(a)): Signaling by flaggers and the use of flaggers, including warning garments worn by flaggers, shall conform to Part 6 of the MUTCD. ### 29 CFR 1926.202 (removed July 15, 2019): Barricades (Construction) — removed 2019, now 1926.200(g) URL: https://hazcomfast.com/osha-standard/1926-202-barricades-construction Status: removed from the Code of Federal Regulations. 29 CFR 1926.202 no longer exists as a standalone section. OSHA removed it, together with 1926.203, in the Standards Improvement Project-Phase IV final rule (84 FR 21416, May 14, 2019, effective July 15, 2019) because it duplicated the revised 1926.200(g). Today the rule that governs construction barricades is 29 CFR 1926.200(g): at points of hazard, construction areas must be posted with legible traffic control signs and protected by traffic control devices (g)(1), and the design and use of all traffic control devices (signs, signals, markings, barricades and other devices) for the protection of construction workers must conform to Part 6 of the MUTCD (g)(2). A citation written today names 1926.200(g), not 1926.202. Regulation text (verbatim, 29 CFR 1926.200(g)(2)): The design and use of all traffic control devices, including signs, signals, markings, barricades, and other devices, for protection of construction workers shall conform to Part 6 of the MUTCD (incorporated by reference, see § 1926.6). ### 29 CFR 1926.250: General Requirements for Storage (Construction) URL: https://hazcomfast.com/osha-standard/1926-250-materials-storage-construction 29 CFR 1926.250 sets the general requirements for storing, handling, and disposing of materials on construction sites: materials stored in tiers must be stacked, racked, blocked, interlocked, or otherwise secured to prevent sliding, falling, or collapse, aisles and passageways must be kept clear, and floor load limits must be observed and posted. Regulation text (verbatim, 29 CFR 1926.250(a)(1)): All materials stored in tiers shall be stacked, racked, blocked, interlocked, or otherwise secured to prevent sliding, falling or collapse. ### 29 CFR 1926.251: Rigging Equipment for Material Handling (Construction) URL: https://hazcomfast.com/osha-standard/1926-251-rigging-construction 29 CFR 1926.251 governs rigging equipment for material handling on construction sites: slings, chains, hooks, and shackles must be inspected before use on each shift and as needed during use, must be marked with their rated capacity, and defective rigging must be removed from service. It protects workers from dropped loads and rigging failure. Regulation text (verbatim, 29 CFR 1926.251(a)(1)): Rigging equipment for material handling shall be inspected prior to use on each shift and as necessary during its use to ensure that it is safe. Defective rigging equipment shall be removed from service. ### 29 CFR 1926.300: General Requirements for Tools (Construction) URL: https://hazcomfast.com/osha-standard/1926-300-tools-general-construction 29 CFR 1926.300 sets the general requirements for hand and power tools on construction sites: all tools, whether furnished by the employer or the worker, must be maintained in a safe condition, and machine guards protecting moving parts, rotating elements, and points of operation must be in place and used. Regulation text (verbatim, 29 CFR 1926.300(a)): All hand and power tools and similar equipment, whether furnished by the employer or the employee, shall be maintained in a safe condition. ### 29 CFR 1926.302: Power-Operated Hand Tools (Construction) URL: https://hazcomfast.com/osha-standard/1926-302-power-tools-construction 29 CFR 1926.302 sets the safety requirements for power-operated hand tools in construction. Electric power tools must be either of the approved double-insulated type or grounded in accordance with Subpart K; pneumatic tools must have their attachments secured to prevent accidental disconnection; fuel-powered tools have handling and refueling rules; and powder-actuated (explosive) tools must be tested before use and operated only by trained operators. Regulation text (verbatim, 29 CFR 1926.302(a)(1)): Electric power operated tools shall either be of the approved double-insulated type or grounded in accordance with subpart K of this part. ### 29 CFR 1926.304: Woodworking Tools (Construction) URL: https://hazcomfast.com/osha-standard/1926-304-woodworking-tools-construction 29 CFR 1926.304 sets the safety requirements for woodworking tools in construction. Every fixed power-driven woodworking tool must have a disconnect switch that can be locked or tagged in the off position, and the standard requires guarding of blades and cutting heads and safe operation of saws, jointers, and other woodworking machines: incorporating the ANSI woodworking-machinery safety standard. Regulation text (verbatim, 29 CFR 1926.304(a)): All fixed power driven woodworking tools shall be provided with a disconnect switch that can either be locked or tagged in the off position. ### 29 CFR 1926.350: Gas Welding and Cutting (Construction) URL: https://hazcomfast.com/osha-standard/1926-350-gas-welding-cutting-construction 29 CFR 1926.350 governs oxygen-fuel gas welding and cutting on construction sites: compressed-gas cylinders must be secured in an upright position, transported and stored with valve protection caps in place, kept away from heat and electrical circuits, and connected through proper regulators and hoses. It controls the cylinder and torch hazards of jobsite cutting. Regulation text (verbatim, 29 CFR 1926.350(a)(9)): Compressed gas cylinders shall be secured in an upright position at all times except, if necessary, for short periods of time while cylinders are actually being hoisted or carried. ### 29 CFR 1926.351: Arc Welding and Cutting (Construction) URL: https://hazcomfast.com/osha-standard/1926-351-arc-welding-construction 29 CFR 1926.351 governs arc welding and cutting on construction sites: electrode holders must be fully insulated and rated for the current, welding cables and connectors must be insulated and in good repair, and ground return cables must have a current-carrying capacity equal to or exceeding the welder's maximum output, protecting workers from electric shock and arc hazards. Regulation text (verbatim, 29 CFR 1926.351(c)(1)): A ground return cable shall have a safe current carrying capacity equal to or exceeding the specified maximum output capacity of the arc welding or cutting unit which it services. ### 29 CFR 1926.352: Fire Prevention During Welding (Construction) URL: https://hazcomfast.com/osha-standard/1926-352-fire-prevention-welding-construction 29 CFR 1926.352 sets the fire-prevention requirements for welding, cutting, and heating in construction. Before hot work, the objects must be moved to a safe location or, if they cannot be moved, nearby movable fire hazards must be relocated or shielded; suitable fire extinguishing equipment must be ready; and a fire watch is required where more than a minor fire could develop. Regulation text (verbatim, 29 CFR 1926.352(a)): When practical, objects to be welded, cut, or heated shall be moved to a designated safe location or, if the objects to be welded, cut, or heated cannot be readily moved, all movable fire hazards in the vicinity shall be taken to a safe place, or otherwise protected. ### 29 CFR 1926.404: Wiring Design and Protection (Construction) URL: https://hazcomfast.com/osha-standard/1926-404-wiring-design-construction 29 CFR 1926.404 governs wiring design and protection on construction sites: employers must protect workers using electricity through either ground-fault circuit interrupters (GFCIs) on receptacles or a documented assured equipment grounding conductor program, plus proper overcurrent protection and grounding. It targets the temporary-power hazards unique to construction. Regulation text (verbatim, 29 CFR 1926.404(b)(1)(ii)): All 120-volt, single-phase, 15- and 20-ampere receptacle outlets on construction sites, which are not a part of the permanent wiring of the building or structure and which are in use by employees, shall have approved ground-fault circuit interrupters for personnel protection. ### 29 CFR 1926.405: Wiring Methods, Components (Construction) URL: https://hazcomfast.com/osha-standard/1926-405-wiring-methods-construction 29 CFR 1926.405 governs wiring methods, components, and equipment on construction sites: flexible cords and cables may not be used as a substitute for the fixed wiring of a structure, conductors must be in approved boxes and properly spliced, and equipment must be grounded. It targets the temporary-power hazards of the jobsite. Regulation text (verbatim, 29 CFR 1926.405(g)(1)(iii)): Unless necessary for a use permitted in paragraph (g)(1)(i) of this section, flexible cords and cables shall not be used: (A) As a substitute for the fixed wiring of a structure; … ### 29 CFR 1926.416: Safety Requirements for Electrical Equipment (Construction) URL: https://hazcomfast.com/osha-standard/1926-416-safety-electrical-construction 29 CFR 1926.416 sets the general electrical safety requirements for construction: no employee may work near any part of an electric circuit unless it is de-energized and grounded or effectively guarded, and employers must warn workers of and protect them from energized parts and overhead power lines. Proximity to a live circuit is the core hazard it addresses. Regulation text (verbatim, 29 CFR 1926.416(a)(1)): No employer shall permit an employee to work in such proximity to any part of an electric power circuit that the employee could contact the electric power circuit in the course of work, unless the employee is protected against electric shock by deenergizing the circuit and grounding it or by guarding it effectively by insulation or other means. ### 29 CFR 1926.431: Maintenance of Equipment (Construction) URL: https://hazcomfast.com/osha-standard/1926-431-maintenance-equipment-construction 29 CFR 1926.431 governs the maintenance of electrical equipment in hazardous (classified) locations on construction sites. It requires that all wiring components and utilization equipment in hazardous locations be maintained in a dust-tight, dust-ignition-proof, or explosion-proof condition, with no loose or missing screws, gaskets, threaded connections, seals, or other impairments to a tight condition, so the equipment cannot ignite a flammable or combustible atmosphere. Regulation text (verbatim, 29 CFR 1926.431): The employer shall ensure that all wiring components and utilization equipment in hazardous locations are maintained in a dust-tight, dust-ignition-proof, or explosion-proof condition, as appropriate. There shall be no loose or missing screws, gaskets, threaded connections, seals, or other impairments to a tight condition. ### 29 CFR 1926.451: Scaffolding (Construction) URL: https://hazcomfast.com/osha-standard/1926-451-scaffolding 29 CFR 1926.451 sets the general requirements for construction scaffolds: each scaffold and component must support at least four times the maximum intended load, fall protection is required for workers more than 10 feet above a lower level, safe access must be provided, and a competent person must inspect the scaffold before each work shift. It was sixth on OSHA's list of most-cited standards for FY2025. Regulation text (verbatim, 29 CFR 1926.451(a)(1)): Except as provided in paragraphs (a)(2), (a)(3), (a)(4), (a)(5) and (g) of this section, each scaffold and scaffold component shall be capable of supporting, without failure, its own weight and at least 4 times the maximum intended load applied or transmitted to it. ### 29 CFR 1926.452: Additional Requirements for Specific Types of Scaffolds URL: https://hazcomfast.com/osha-standard/1926-452-scaffold-types-construction 29 CFR 1926.452 sets the additional requirements that apply to specific types of scaffolds: pole scaffolds, tube-and-coupler, fabricated frame, mobile, two-point (suspension/swing-stage), and many others. These type-specific rules apply ON TOP of the general scaffold requirements in 1926.451; scaffolds not specifically addressed by 1926.452, such as systems scaffolds, must meet the requirements of 1926.451. Regulation text (verbatim, 29 CFR 1926.452): In addition to the applicable requirements of § 1926.451, the following requirements apply to the specific types of scaffolds indicated. Scaffolds not specifically addressed by § 1926.452, such as but not limited to systems scaffolds, must meet the requirements of § 1926.451. ### 29 CFR 1926.453: Aerial Lifts URL: https://hazcomfast.com/osha-standard/1926-453-aerial-lifts 29 CFR 1926.453 governs aerial lifts such as boom and bucket trucks in construction: only trained, authorized persons may operate them, workers in the basket must wear a body harness with a lanyard attached to the boom or basket, and controls must be tested daily. Belting off to an adjacent pole or structure is prohibited. Regulation text (verbatim, 29 CFR 1926.453(b)(2)(v)): A body belt shall be worn and a lanyard attached to the boom or basket when working from an aerial lift. ### 29 CFR 1926.454: Training Requirements for Scaffolds URL: https://hazcomfast.com/osha-standard/1926-454-scaffold-training-construction 29 CFR 1926.454 requires scaffold training: each employee who works on a scaffold must be trained by a person qualified in the subject to recognize the scaffold's hazards and the procedures to control them, and each employee who erects, moves, or dismantles scaffolds must be trained by a competent person. Retraining is required when conditions change. Regulation text (verbatim, 29 CFR 1926.454(a)): The employer shall have each employee who performs work while on a scaffold trained by a person qualified in the subject matter to recognize the hazards associated with the type of scaffold being used and to understand the procedures to control or minimize those hazards. ### 29 CFR 1926.500: Fall Protection – Scope, Application, Definitions (Construction) URL: https://hazcomfast.com/osha-standard/1926-500-fall-protection-scope 29 CFR 1926.500 is the scope, application, and definitions section for Subpart M: OSHA's fall-protection standards in construction. It establishes that Subpart M covers fall protection for construction work under Part 1926, routes certain work (scaffolds, ladders, steel erection, cranes) to its own subpart, and defines the key terms (guardrail system, personal fall arrest system, safety net, leading edge, and more) used throughout 1926.501–1926.503. Regulation text (summary, 29 CFR 1926.500(a)(1)): This subpart sets forth requirements and criteria for fall protection in construction workplaces covered under 29 CFR part 1926. ### 29 CFR 1926.501: Duty to Have Fall Protection (Construction) URL: https://hazcomfast.com/osha-standard/1926-501-fall-protection 29 CFR 1926.501 is OSHA's construction fall-protection duty standard: it requires employers to protect every worker on a walking or working surface 6 feet or more above a lower level with a guardrail system, a safety net system, or a personal fall arrest system. It is OSHA's single most-cited standard. Regulation text (verbatim, 29 CFR 1926.501(b)(1)): Each employee on a walking/working surface (horizontal and vertical surface) with an unprotected side or edge which is 6 feet (1.8 m) or more above a lower level shall be protected from falling by the use of guardrail systems, safety net systems, or personal fall arrest systems. ### 29 CFR 1926.502: Fall Protection Systems Criteria (Construction) URL: https://hazcomfast.com/osha-standard/1926-502-fall-protection-systems-construction 29 CFR 1926.502 sets the criteria that construction fall-protection systems must meet: guardrail top rails at 42 inches (plus or minus 3), rails able to withstand a 200-pound force, personal fall arrest anchorages rated for 5,000 pounds per worker (or designed to a safety factor of at least two under a qualified person, 1926.502(d)(15) allows either) and arrest systems that limit free fall to 6 feet. It is the 'how' to 1926.501's 'where.' Regulation text (verbatim, 29 CFR 1926.502(b)(1)): Top edge height of top rails, or equivalent guardrail system members, shall be 42 inches (1.1 m) plus or minus 3 inches (8 cm) above the walking/working level. ### 29 CFR 1926.503: Training Requirements for Fall Protection (Construction) URL: https://hazcomfast.com/osha-standard/1926-503-fall-protection-training 29 CFR 1926.503 requires a competent person to train each construction worker who might be exposed to fall hazards (covering the nature of the hazards, the correct use and inspection of fall-protection systems, and their limitations) and to retrain workers when changes or lapses show the training did not hold. It completes the 501/502/503 fall-protection trio. Regulation text (verbatim, 29 CFR 1926.503(a)(1)): The employer shall provide a training program for each employee who might be exposed to fall hazards. The program shall enable each employee to recognize the hazards of falling and shall train each employee in the procedures to be followed in order to minimize these hazards. ### 29 CFR 1926.1436: Derricks (Construction) URL: https://hazcomfast.com/osha-standard/1926-1436-derricks-construction 29 CFR 1926.1436 sets the supplemental requirements for derricks used in construction: powered lifting devices with a mast or equivalent member held in place by guys or braces, including A-frame, gin pole, guy, breast, Chicago boom, shearleg, and stiffleg derricks. These requirements apply IN ADDITION to the general crane and derrick rules of Subpart CC, covering the design, erection, anchorage, and safe use specific to derricks. Regulation text (summary, 29 CFR 1926.1436(a)): This section contains supplemental requirements for derricks, whether temporarily or permanently mounted; all sections of this subpart apply to derricks unless specified otherwise. ### 29 CFR 1926.1400: Cranes and Derricks in Construction – Scope URL: https://hazcomfast.com/osha-standard/1926-1400-cranes-scope 29 CFR 1926.1400 sets the scope and application of Subpart CC, OSHA's comprehensive construction cranes and derricks standard. It defines which power-operated equipment is covered and frames the subpart's core protections: power-line safety, qualified and certified operators, assembly and disassembly procedures, and keeping workers clear of suspended loads. Regulation text (summary, 29 CFR 1926.1400(a)): This standard applies to power-operated equipment, when used in construction, that can hoist, lower and horizontally move a suspended load. ### 29 CFR 1926.1404: Assembly/Disassembly – General Requirements URL: https://hazcomfast.com/osha-standard/1926-1404-assembly-disassembly 29 CFR 1926.1404 governs assembly and disassembly of cranes and derricks in construction. It requires that the work be directed by an "A/D director", a person who is both a competent person and a qualified person (or a competent person assisted by qualified persons), and be carried out following the manufacturer's procedures or procedures developed by a qualified engineer. It targets the crushing, tip-over, and struck-by hazards of rigging cranes up and down. Regulation text (verbatim, 29 CFR 1926.1404(a)(1)): Assembly/disassembly must be directed by a person who meets the criteria for both a competent person and a qualified person, or by a competent person who is assisted by one or more qualified persons ("A/D director"). ### 29 CFR 1926.1408: Power Line Safety (Up to 350 kV) – Equipment Operations URL: https://hazcomfast.com/osha-standard/1926-1408-power-line-safety 29 CFR 1926.1408 governs power-line safety for cranes operating near lines up to 350 kV: before work, the employer must determine whether any part of the equipment or load could get within 20 feet of a power line, and if so, either de-energize and ground the line, maintain the 20-foot clearance, or follow the Table A minimum approach distances for the voltage. Regulation text (summary, 29 CFR 1926.1408(a)(2)): Determine if any part of the equipment, load line or load (including rigging and lifting accessories), if operated up to the equipment's maximum working radius in the work zone, could get closer than 20 feet to a power line. ### 29 CFR 1926.1416: Operational Aids URL: https://hazcomfast.com/osha-standard/1926-1416-operational-aids 29 CFR 1926.1416 requires that "operational aids" on cranes (devices such as the anti-two-block warning device, boom hoist limiting device, boom angle or radius indicator, and load-moment (rated capacity) indicator or limiter) be present and functional on covered equipment. If a listed operational aid stops working, the standard sets time limits and temporary measures for continuing or halting operations until it is repaired. Regulation text (verbatim, 29 CFR 1926.1416(a)): The devices listed in this section ("listed operational aids") are required on all equipment covered by this subpart, unless otherwise specified. ### 29 CFR 1926.1417: Operation (Cranes) URL: https://hazcomfast.com/osha-standard/1926-1417-crane-operation 29 CFR 1926.1417 sets the rules for operating cranes and derricks in construction. The employer must comply with all manufacturer procedures for the equipment's operational functions, keep loads within the crane's rated capacity, ensure the operator does not leave the controls with a suspended load, and stop operations if there is any sign the equipment is unstable or a component is failing. Regulation text (verbatim, 29 CFR 1926.1417(a)): The employer must comply with all manufacturer procedures applicable to the operational functions of equipment, including its use with attachments. ### 29 CFR 1926.1424: Work Area Control URL: https://hazcomfast.com/osha-standard/1926-1424-work-area-control 29 CFR 1926.1424 addresses the swing-radius hazard around a crane: the area where the rotating superstructure (the cab and counterweight) can strike a worker or pinch and crush them against another object. Where such accessible areas exist, the employer must train assigned employees on the hazard and erect and maintain control lines, warning lines, railings, or similar barriers to mark the hazard boundaries. Regulation text (summary, 29 CFR 1926.1424(a)(1)): The requirements in paragraph (a)(2) of this section apply where there are accessible areas in which the equipment's rotating superstructure (whether permanently or temporarily mounted) poses a reasonably foreseeable risk of: (i) Striking and injuring an employee; or (ii) Pinching/crushing an employee against another part of the equipment or another object. ### 29 CFR 1926.1425: Keeping Clear of the Load URL: https://hazcomfast.com/osha-standard/1926-1425-crane-keeping-clear 29 CFR 1926.1425 requires keeping employees clear of suspended and moving crane loads. Hoisting routes that minimize workers' exposure to loads must be used where available, and while a load is rigged and being lifted, workers must be kept out from under the load and out of the fall zone, with only narrow exceptions (such as employees engaged in hooking, unhooking, or guiding the load, or in the initial connection of a load to a component). Regulation text (verbatim, 29 CFR 1926.1425(a)): Where available, hoisting routes that minimize the exposure of employees to hoisted loads must be used, to the extent consistent with public safety. ### 29 CFR 1926.1426: Free Fall and Controlled Lowering URL: https://hazcomfast.com/osha-standard/1926-1426-crane-free-fall 29 CFR 1926.1426 restricts free fall and requires controlled lowering on cranes. Using equipment in which the boom is designed to free fall (a "live boom") is prohibited in specified dangerous circumstances: such as when workers are in the fall zone, when personnel are being hoisted, or near power lines. The section also limits load-line free fall and requires controlled load lowering so loads and booms stay under powered control. Regulation text (summary, 29 CFR 1926.1426(a)(1)): The use of equipment in which the boom is designed to free fall (live boom) is prohibited in each of the following circumstances: ### 29 CFR 1926.1427: Operator Qualification and Certification URL: https://hazcomfast.com/osha-standard/1926-1427-crane-operator-qualifications 29 CFR 1926.1427 requires that construction crane operators be trained, certified or licensed, and evaluated before they operate equipment covered by Subpart CC. Certification alone is not enough: the employer must also evaluate the operator's ability to run the specific equipment safely for the assigned work. Regulation text (verbatim, 29 CFR 1926.1427(a)): The employer must ensure that each operator is trained, certified/licensed, and evaluated in accordance with this section before operating any equipment covered under subpart CC. ### 29 CFR 1926.1431: Hoisting Personnel URL: https://hazcomfast.com/osha-standard/1926-1431-hoisting-personnel 29 CFR 1926.1431 governs hoisting employees with a crane. It is prohibited except where the employer demonstrates that conventional means of reaching the worksite (a personnel hoist, ladder, stairway, aerial lift, elevating work platform, or scaffold) would be more hazardous or are not possible because of the project's design or worksite conditions. When personnel hoisting is allowed, it requires a proper personnel platform and a long list of strict safety controls. Regulation text (verbatim, 29 CFR 1926.1431(a)): The use of equipment to hoist employees is prohibited except where the employer demonstrates that the erection, use, and dismantling of conventional means of reaching the work area, such as a personnel hoist, ladder, stairway, aerial lift, elevating work platform, or scaffold, would be more hazardous, or is not possible because of the project's structural design or worksite conditions. ### 29 CFR 1926.600: Equipment (Construction) URL: https://hazcomfast.com/osha-standard/1926-600-equipment-construction 29 CFR 1926.600 sets the general safety requirements for construction equipment (Subpart O). Among its rules: equipment left unattended at night near a highway or active construction area must be marked with appropriate lights, reflectors, or barricades; heavy machinery or parts suspended or held aloft must be substantially blocked before workers are permitted underneath; and equipment must be parked, secured, and operated safely. Regulation text (verbatim, 29 CFR 1926.600(a)(1)): All equipment left unattended at night, adjacent to a highway in normal use, or adjacent to construction areas where work is in progress, shall have appropriate lights or reflectors, or barricades equipped with appropriate lights or reflectors, to identify the location of the equipment. ### 29 CFR 1926.601: Motor Vehicles (Construction) URL: https://hazcomfast.com/osha-standard/1926-601-motor-vehicles-construction 29 CFR 1926.601 governs motor vehicles used on construction sites: seat belts and anchorages must be installed in all motor vehicles, service, emergency, and parking brakes must work, lights and warning devices must function, and vehicles with obstructed rear views must not back up without a signal or reverse alarm. Regulation text (verbatim, 29 CFR 1926.601(b)(9)): Seat belts and anchorages meeting the requirements of 49 CFR part 571 (Department of Transportation, Federal Motor Vehicle Safety Standards) shall be installed in all motor vehicles. ### 29 CFR 1926.602: Material Handling Equipment (Construction) URL: https://hazcomfast.com/osha-standard/1926-602-material-handling-equipment 29 CFR 1926.602 governs earthmoving and material-handling equipment on construction sites: loaders, dozers, scrapers, graders, and similar machines. It requires rollover protective structures (ROPS) and seat belts on covered equipment, and prohibits operating equipment with an obstructed rear view in reverse without a reverse-signal alarm or a spotter. Regulation text (verbatim, 29 CFR 1926.602(a)(9)(ii)): No employer shall permit earthmoving or compacting equipment which has an obstructed view to the rear to be used in reverse gear unless the equipment has in operation a reverse signal alarm distinguishable from the surrounding noise level or an employee signals that it is safe to do so. ### 29 CFR 1926.650: Excavations – Scope, Application, and Definitions URL: https://hazcomfast.com/osha-standard/1926-650-excavation-scope 29 CFR 1926.650 is the scope, application, and definitions section for Subpart P: OSHA's excavation and trenching standard. It establishes that the subpart applies to ALL open excavations made in the earth's surface, with trenches specifically included, and it defines the key terms (competent person, protective system, sloping, benching, shoring, and trench) used in the substantive requirements in 1926.651 and 1926.652. Regulation text (summary, 29 CFR 1926.650(a)): This subpart applies to all open excavations made in the earth's surface. Excavations are defined to include trenches. ### 29 CFR 1926.651: Specific Excavation Requirements URL: https://hazcomfast.com/osha-standard/1926-651-excavations 29 CFR 1926.651 sets the general requirements for construction excavations beyond cave-in protection: a safe means of egress within 25 feet of lateral travel in trenches 4 feet or deeper, atmospheric testing where hazardous air could exist, spoil kept back from the edge, and a daily inspection by a competent person. Cave-in protective systems themselves are covered by 1926.652. Regulation text (verbatim, 29 CFR 1926.651(k)(1)): Daily inspections of excavations, the adjacent areas, and protective systems shall be made by a competent person for evidence of a situation that could result in possible cave-ins, indications of failure of protective systems, hazardous atmospheres, or other hazardous conditions. ### 29 CFR 1926.652: Requirements for Protective Systems (Excavations) URL: https://hazcomfast.com/osha-standard/1926-652-protective-systems-excavation 29 CFR 1926.652 requires that every worker in an excavation be protected from cave-ins by an adequate protective system (sloping, benching, shoring, or shielding) unless the excavation is in stable rock or under 5 feet deep with a competent person's finding of no cave-in potential. Systems for excavations over 20 feet deep must be designed by a registered professional engineer. Regulation text (verbatim, 29 CFR 1926.652(a)(1)): Each employee in an excavation shall be protected from cave-ins by an adequate protective system designed in accordance with paragraph (b) or (c) of this section except when: (i) Excavations are made entirely in stable rock; or (ii) Excavations are less than 5 feet (1.52m) in depth and examination of the ground by a competent person provides no indication of a potential cave-in. ### 29 CFR 1926.700: Concrete and Masonry Construction – Scope URL: https://hazcomfast.com/osha-standard/1926-700-concrete-masonry-scope 29 CFR 1926.700 is the scope, application, and definitions section for Subpart Q: OSHA's concrete and masonry construction standard. It sets forth requirements to protect all construction employees from the hazards of concrete and masonry operations, and notes that other relevant provisions in parts 1910 and 1926 also apply. The substantive rules follow in 1926.701 (general), 1926.703 (formwork and shoring), 1926.705 (lift-slab), and 1926.706 (masonry). Regulation text (summary, 29 CFR 1926.700(a)): This subpart sets forth requirements to protect all construction employees from the hazards associated with concrete and masonry construction operations performed in workplaces covered under 29 CFR part 1926. In addition to the requirements in subpart Q, other relevant provisions in parts 1910 and 1926 apply to concrete and masonry construction operations. ### 29 CFR 1926.701: General Requirements for Concrete (Construction) URL: https://hazcomfast.com/osha-standard/1926-701-concrete-general 29 CFR 1926.701 sets the general requirements for concrete construction: no construction loads may be placed on a concrete structure until a person qualified in structural design confirms it can support them, protruding reinforcing steel must be guarded to prevent impalement, and workers must be kept clear of concrete buckets and placing equipment. Regulation text (verbatim, 29 CFR 1926.701(a)): No construction loads shall be placed on a concrete structure or portion of a concrete structure unless the employer determines, based on information received from a person who is qualified in structural design, that the structure or portion of the structure is capable of supporting the loads. ### 29 CFR 1926.702: Requirements for Equipment and Tools (Concrete) URL: https://hazcomfast.com/osha-standard/1926-702-concrete-equipment 29 CFR 1926.702 sets safety requirements for concrete-placing equipment: bulk cement storage, concrete mixers, pumping systems, and concrete buckets. A defining rule is that concrete buckets with hydraulic or pneumatic gates must have positive safety latches to prevent premature or accidental dumping of the load onto workers below. Regulation text (verbatim, 29 CFR 1926.702(f)(1)): Concrete buckets equipped with hydraulic or pneumatic gates shall have positive safety latches or similar safety devices installed to prevent premature or accidental dumping. ### 29 CFR 1926.703: Requirements for Cast-in-Place Concrete (Formwork) URL: https://hazcomfast.com/osha-standard/1926-703-formwork-shoring 29 CFR 1926.703 governs formwork and shoring for cast-in-place concrete: formwork must be designed, fabricated, erected, supported, braced, and maintained so it can support without failure all vertical and lateral loads anticipated during the pour, with the drawings available at the jobsite and shoring erected and removed under a competent person's supervision. Regulation text (verbatim, 29 CFR 1926.703(a)(1)): Formwork shall be designed, fabricated, erected, supported, braced and maintained so that it will be capable of supporting without failure all vertical and lateral loads that may reasonably be anticipated to be applied to the formwork. ### 29 CFR 1926.706: Requirements for Masonry Construction URL: https://hazcomfast.com/osha-standard/1926-706-masonry-construction 29 CFR 1926.706 governs masonry construction: a limited access zone must be established on the unscaffolded side whenever a masonry wall is being built, keeping unnecessary workers away, and masonry walls over 8 feet tall must be braced until they are permanently supported, because a fresh, unsupported wall can collapse and crush workers. Regulation text (verbatim, 29 CFR 1926.706(a)): A limited access zone shall be established whenever a masonry wall is being constructed. ### 29 CFR 1926.750: Steel Erection – Scope URL: https://hazcomfast.com/osha-standard/1926-750-steel-erection-scope 29 CFR 1926.750 is the scope section for Subpart R: OSHA's steel erection standard. It sets forth requirements to protect employees from the hazards of steel erection activities in the construction, alteration, or repair of single- and multi-story buildings, bridges, and other structures where steel erection occurs. It excludes electrical transmission towers, communication and broadcast towers, and tanks, and the substantive rules follow in 1926.751–1926.761. Regulation text (summary, 29 CFR 1926.750(a)): This subpart sets forth requirements to protect employees from the hazards associated with steel erection activities involved in the construction, alteration, and/or repair of single and multi-story buildings, bridges, and other structures where steel erection occurs. The requirements of this subpart apply to employers engaged in steel erection unless otherwise specified. This subpart does not cover electrical transmission towers, communication and broadcast towers, or tanks. ### 29 CFR 1926.752: Site Layout, Site-Specific Erection Plan, and Construction Sequence URL: https://hazcomfast.com/osha-standard/1926-752-site-layout 29 CFR 1926.752 governs site layout and the start of steel erection (Subpart R). Before steel erection begins, the controlling contractor must give the steel erector written notification that the concrete in the footings, piers, and walls has attained 75 percent of its intended minimum compressive design strength (or sufficient strength to support the loads), and the standard also addresses adequate access roads and firm, graded ground so cranes and equipment can operate safely. Regulation text (summary, 29 CFR 1926.752(a)(1)): The concrete in the footings, piers and walls and the mortar in the masonry piers and walls has attained, on the basis of an appropriate ASTM standard test method of field-cured samples, either 75 percent of the intended minimum compressive design strength or sufficient strength to support the loads imposed during steel erection. ### 29 CFR 1926.756: Beams and Columns (Steel Erection) URL: https://hazcomfast.com/osha-standard/1926-756-beams-columns 29 CFR 1926.756 sets the requirements for placing beams and columns during steel erection. During the final placing of solid web structural members, the load may not be released from the hoisting line until the member is secured with at least two bolts per connection (of the size and strength shown in the erection drawings), drawn up wrench-tight, and columns must be anchored with a minimum of four anchor rods. These rules keep members from shifting or collapsing during erection. Regulation text (verbatim, 29 CFR 1926.756(a)(1)): During the final placing of solid web structural members, the load shall not be released from the hoisting line until the members are secured with at least two bolts per connection, of the same size and strength as shown in the erection drawings, drawn up wrench-tight or the equivalent as specified by the project structural engineer of record, except as specified in paragraph (b) of this section. ### 29 CFR 1926.760: Fall Protection (Steel Erection) URL: https://hazcomfast.com/osha-standard/1926-760-fall-protection-steel-erection 29 CFR 1926.760 requires fall protection for workers engaged in steel erection who are more than 15 feet above a lower level: guardrails, safety nets, or personal fall arrest, positioning, or restraint systems. Its 15-foot trigger is higher than the general construction 6-foot rule, with special provisions for connectors and controlled decking zones. Regulation text (verbatim, 29 CFR 1926.760(a)(1)): Except as provided by paragraph (a)(3) of this section, each employee engaged in a steel erection activity who is on a walking/working surface with an unprotected side or edge more than 15 feet (4.6 m) above a lower level shall be protected from fall hazards by guardrail systems, safety net systems, personal fall arrest systems, positioning device systems or fall restraint systems. ### 29 CFR 1926.800: Underground Construction URL: https://hazcomfast.com/osha-standard/1926-800-underground-construction 29 CFR 1926.800 governs underground construction: the building of tunnels, shafts, chambers, and passageways (and certain connected cut-and-cover work). It sets comprehensive requirements for controlling access and accounting for everyone underground, air monitoring and ventilation, ground support, protection against gassy conditions and fire, and emergency provisions such as rescue teams and self-rescuers. Regulation text (summary, 29 CFR 1926.800(a)(1)): This section applies to the construction of underground tunnels, shafts, chambers, and passageways. This section also applies to cut-and-cover excavations which are both physically connected to ongoing underground construction operations within the scope of this section, and covered in such a manner as to create conditions characteristic of underground construction. ### 29 CFR 1926.850: Preparatory Operations (Demolition) URL: https://hazcomfast.com/osha-standard/1926-850-demolition-preparatory-operations 29 CFR 1926.850 requires preparatory steps before any demolition begins: a competent person must make an engineering survey of the structure to determine the condition of the framing, floors, and walls and the possibility of unplanned collapse, utilities must be shut off or controlled, and the survey must be documented in writing. Regulation text (verbatim, 29 CFR 1926.850(a)): Prior to permitting employees to start demolition operations, an engineering survey shall be made, by a competent person, of the structure to determine the condition of the framing, floors, and walls, and possibility of unplanned collapse of any portion of the structure. ### 29 CFR 1926.859: Mechanical Demolition URL: https://hazcomfast.com/osha-standard/1926-859-mechanical-demolition 29 CFR 1926.859 sets the safety requirements for mechanical demolition: using a crane with a wrecking ball ("balling") or a clamshell bucket ("clamming"), or other mechanical means, to demolish a structure. No workers may be in any area that can be adversely affected by the demolition when balling or clamming is being performed, and only necessary workers may be in the area at other times; the standard also controls debris, floor loading, and structural stability. Regulation text (verbatim, 29 CFR 1926.859(a)): No workers shall be permitted in any area, which can be adversely affected by demolition operations, when balling or clamming is being performed. ### 29 CFR 1926.900: General Provisions for Blasting (Construction) URL: https://hazcomfast.com/osha-standard/1926-900-blasting-general 29 CFR 1926.900 sets the general provisions for blasting and the use of explosives in construction (Subpart U). Its foundational rule is that only authorized and qualified persons may handle and use explosives, and it establishes the basic safe-practice requirements (controlling ignition sources, prohibiting smoking near explosives, protecting against stray current, and following safe procedures) that underpin the more specific construction blasting rules. Regulation text (verbatim, 29 CFR 1926.900(a)): The employer shall permit only authorized and qualified persons to handle and use explosives. ### 29 CFR 1926.950: General Requirements for Power Transmission (Construction) URL: https://hazcomfast.com/osha-standard/1926-950-power-transmission-construction 29 CFR 1926.950 sets the general requirements for the construction of electric power transmission and distribution lines and equipment: the opening section of Subpart V, the construction counterpart to the general-industry 1910.269. It establishes the safety framework for building power lines: qualified workers, host and contract employer coordination, job briefings, and the de-energizing, grounding, and minimum-approach-distance protections applied throughout Subpart V. Regulation text (summary, 29 CFR 1926.950(a)(1)(i)): This subpart, except for paragraph (a)(3) of this section, covers the construction of electric power transmission and distribution lines and equipment. ### 29 CFR 1926.1050: Scope, Application, and Definitions – Stairways and Ladders URL: https://hazcomfast.com/osha-standard/1926-1050-stairways-ladders-scope 29 CFR 1926.1050 is the scope, application, and definitions section for Subpart X, OSHA's stairway and ladder standard for construction. It establishes that Subpart X applies to all stairways and ladders used in construction, alteration, repair, painting, decorating, and demolition, and sets when they must be provided, with the specific requirements in 1926.1051–1926.1053 and training in 1926.1060. Regulation text (verbatim, 29 CFR 1926.1050(a)): This subpart applies to all stairways and ladders used in construction, alteration, repair (including painting and decorating), and demolition workplaces covered under 29 CFR part 1926, and also sets forth, in specified circumstances, when ladders and stairways are required to be provided. ### 29 CFR 1926.1051: General Requirements – Stairways and Ladders URL: https://hazcomfast.com/osha-standard/1926-1051-general-stairway-ladder-requirements 29 CFR 1926.1051 sets the general requirements of Subpart X: construction stairways and ladders. Its core rule is that a stairway or ladder must be provided at all personnel points of access where there is a break in elevation of 19 inches (48 cm) or more, and no ramp, runway, sloped embankment, or personnel hoist is provided. It also requires a second point of access where 25 or more employees use a point of access, or where a ladder serves simultaneous two-way traffic. Regulation text (verbatim, 29 CFR 1926.1051(a)): A stairway or ladder shall be provided at all personnel points of access where there is a break in elevation of 19 inches (48 cm) or more, and no ramp, runway, sloped embankment, or personnel hoist is provided. ### 29 CFR 1926.1052: Stairways (Construction) URL: https://hazcomfast.com/osha-standard/1926-1052-stairways-construction 29 CFR 1926.1052 sets the requirements for stairways used during construction: a stair rail and handrail are required on stairways with four or more risers or rising more than 30 inches, risers and treads must be uniform, and temporary stairs must be kept clear. It pairs with the ladder standard as the safe means of access between levels. Regulation text (verbatim, 29 CFR 1926.1052(c)(1)): Stairways having four or more risers or rising more than 30 inches (76 cm), whichever is less, shall be equipped with: (i) At least one handrail; and (ii) One stairrail system along each unprotected side or edge. ### 29 CFR 1926.1053: Ladders (Construction) URL: https://hazcomfast.com/osha-standard/1926-1053-ladders-construction 29 CFR 1926.1053 sets the construction requirements for ladders: side rails must extend at least 3 feet above the upper landing surface, ladders must be used only for their intended purpose, and damaged ladders must be removed from service. Ladder falls are common and preventable, which keeps this standard frequently cited. Regulation text (verbatim, 29 CFR 1926.1053(b)(1)): When portable ladders are used for access to an upper landing surface, the ladder side rails shall extend at least 3 feet (.9 m) above the upper landing surface to which the ladder is used to gain access; or, when such an extension is not possible because of the ladder's length, then the ladder shall be secured at its top to a rigid support that will not deflect, and a grasping device, such as a grabrail, shall be provided to assist employees in mounting and dismounting the ladder. ### 29 CFR 1926.1060: Training Requirements – Stairways and Ladders URL: https://hazcomfast.com/osha-standard/1926-1060-stairway-ladder-training 29 CFR 1926.1060 requires employers to provide a training program for each employee who uses ladders and stairways in construction. The program must enable each worker to recognize the hazards related to ladders and stairways and train them in the procedures to minimize those hazards. Retraining is required when a worker's performance or a change in conditions shows they lack the necessary understanding. Regulation text (verbatim, 29 CFR 1926.1060(a)): The employer shall provide a training program for each employee using ladders and stairways, as necessary. The program shall enable each employee to recognize hazards related to ladders and stairways, and shall train each employee in the procedures to be followed to minimize these hazards. ### 29 CFR 1926.1201: Confined Spaces in Construction – Scope URL: https://hazcomfast.com/osha-standard/1926-1201-confined-spaces-construction-scope 29 CFR 1926.1201 is the scope section of Subpart AA: Confined Spaces in Construction. It establishes that the standard sets forth requirements to protect employees engaged in construction activities at a worksite with one or more confined spaces, subject to the exceptions in paragraph (b) (such as excavations and diving, which other standards cover). It is the doorway to the construction confined-space rules in 1926.1202 through 1926.1213. Regulation text (summary, 29 CFR 1926.1201(a)): This standard sets forth requirements for practices and procedures to protect employees engaged in construction activities at a worksite with one or more confined spaces, subject to the exceptions in paragraph (b) of this section. ### 29 CFR 1926.1203: General Requirements for Confined Spaces in Construction URL: https://hazcomfast.com/osha-standard/1926-1203-confined-spaces-general-construction 29 CFR 1926.1203 is the general requirement of Subpart AA, OSHA's construction confined-spaces standard: before work begins, a competent person must identify all confined spaces where workers may enter and determine which are permit-required confined spaces, so the site knows where the atmospheric, engulfment, and configuration hazards are. Regulation text (verbatim, 29 CFR 1926.1203(a)): Before it begins work at a worksite, each employer must ensure that a competent person identifies all confined spaces in which one or more of the employees it directs may work, and identifies each space that is a permit space, through consideration and evaluation of the elements of that space, including testing as necessary. ### 29 CFR 1926.1204: Permit-Required Confined Spaces (Construction) URL: https://hazcomfast.com/osha-standard/1926-1204-permit-required-confined-spaces-construction 29 CFR 1926.1204 is the core of Subpart AA: it requires each entry employer to develop and implement a written permit-required confined space program before workers enter a permit space on a construction site. The program must prevent unauthorized entry, identify and evaluate permit-space hazards, establish safe entry procedures, and provide testing and monitoring, attendants, rescue, and permits. Regulation text (verbatim, 29 CFR 1926.1204): Permit-required confined space program. Each entry employer must: (a) Implement the measures necessary to prevent unauthorized entry; ### 29 CFR 1926.1207: Training (Confined Spaces in Construction) URL: https://hazcomfast.com/osha-standard/1926-1207-confined-space-training-construction 29 CFR 1926.1207 is the training requirement of Subpart AA. Employers must train every employee whose work is regulated by the confined-space standard (entrants, attendants, and entry supervisors) at no cost, so they have the understanding, knowledge, and skills to perform their duties safely. Training must be provided before initial assignment and again when duties or permit-space conditions change. Regulation text (verbatim, 29 CFR 1926.1207(a)): The employer must provide training to each employee whose work is regulated by this standard, at no cost to the employee, and ensure that the employee possesses the understanding, knowledge, and skills necessary for the safe performance of the duties assigned under this standard. ### 29 CFR 1926.1430: Training (Cranes and Derricks in Construction) URL: https://hazcomfast.com/osha-standard/1926-1430-training-cranes 29 CFR 1926.1430 sets the training requirements for cranes and derricks in construction. The employer must provide role-based training so that each person involved in crane work (operators, signal persons, riggers, competent persons, qualified persons, and employees working around the equipment) is trained on the topics relevant to their assigned role and the hazards they face. Regulation text (verbatim, 29 CFR 1926.1430(d)): The employer must train each competent person and each qualified person regarding the requirements of this subpart applicable to their respective roles. ### 29 CFR 1926.1153: Respirable Crystalline Silica (Construction) URL: https://hazcomfast.com/osha-standard/1926-1153-silica-exposure 29 CFR 1926.1153 protects construction workers from respirable crystalline silica, capping exposure at a 50 µg/m³ 8-hour TWA with a 25 µg/m³ action level. Employers comply either by following Table 1's specified controls for a task or by assessing exposure and controlling to the PEL, plus a written exposure control plan and medical surveillance. Regulation text (verbatim, 29 CFR 1926.1153(d)(1)): The employer shall ensure that no employee is exposed to an airborne concentration of respirable crystalline silica in excess of 50 µg/m3, calculated as an 8-hour TWA. ### 29 CFR 1910.134: Respiratory Protection URL: https://hazcomfast.com/osha-standard/1910-134-respiratory-protection 29 CFR 1910.134 requires a written respiratory protection program wherever respirators are needed to protect workers from airborne hazards or oxygen deficiency. It mandates a trained program administrator, hazard-based respirator selection, a medical evaluation before use, fit testing, training, and maintenance, because a respirator only protects if it is the right type, medically appropriate, and sealed. Regulation text (verbatim, 29 CFR 1910.134(c)(1)): In any workplace where respirators are necessary to protect the health of the employee or whenever respirators are required by the employer, the employer shall establish and implement a written respiratory protection program with worksite-specific procedures. The program shall be updated as necessary to reflect those changes in workplace conditions that affect respirator use. ### 29 CFR 1910.66: Powered Platforms for Building Maintenance URL: https://hazcomfast.com/osha-standard/1910-66-powered-platforms 29 CFR 1910.66 covers powered platform installations permanently dedicated to interior or exterior building maintenance: the suspended platforms used for tasks like window cleaning, caulking, and facade work on a specific building. It sets requirements for the platform and its suspension and support systems, fall protection for workers, inspection and testing, operator training, and emergency and rescue procedures. Regulation text (summary, 29 CFR 1910.66(a)): This section covers powered platform installations permanently dedicated to interior or exterior building maintenance of a specific structure or group of structures. This section does not apply to suspended scaffolds (swinging scaffolds) used to service buildings on a temporary basis and covered under subpart D of this part, nor to suspended scaffolds used for construction work and covered under subpart L of 29 CFR part 1926. ### 29 CFR 1910.68: Manlifts URL: https://hazcomfast.com/osha-standard/1910-68-manlifts 29 CFR 1910.68 covers manlifts: the powered devices with steps and handholds on a continuously moving vertical belt that carry workers between floors in some industrial buildings. It applies to the construction, maintenance, inspection, and operation of manlifts in relation to accident hazards, setting requirements for handholds and steps, brakes and limit stops, floor openings and guards, and periodic inspection. Regulation text (summary, 29 CFR 1910.68(b)(1)): This section applies to the construction, maintenance, inspection, and operation of manlifts in relation to accident hazards. ### 29 CFR 1910.111: Storage and Handling of Anhydrous Ammonia URL: https://hazcomfast.com/osha-standard/1910-111-anhydrous-ammonia 29 CFR 1910.111 governs the storage and handling of anhydrous ammonia: a corrosive, toxic gas stored as a liquid under pressure. It requires that ammonia systems be designed, constructed, located, installed, and operated per approved consensus standards, with the equipment, relief devices, and safeguards that contain this hazardous gas. Regulation text (summary, 29 CFR 1910.111(a)(1)(i)): This standard is intended to apply to the design, construction, location, installation, and operation of anhydrous ammonia systems including refrigerated ammonia storage systems. ### 29 CFR 1910.1096: Ionizing Radiation URL: https://hazcomfast.com/osha-standard/1910-1096-ionizing-radiation 29 CFR 1910.1096 protects workers from ionizing radiation: X-rays, gamma rays, and particles from radioactive materials and radiation-producing machines. It limits the dose an individual in a restricted area may receive (1¼ rems per calendar quarter to the whole body) and requires radiation surveys, personnel monitoring (dosimetry), posting and labeling, and controls wherever radiation sources are used. Regulation text (verbatim, 29 CFR 1910.1096(b)(1)): Except as provided in paragraph (b)(2) of this section, no employer shall possess, use, or transfer sources of ionizing radiation in such a manner as to cause any individual in a restricted area to receive in any period of one calendar quarter from sources in the employer's possession or control a dose in excess of the limits specified in Table G-18: ### 29 CFR 1910.1450: Occupational Exposure to Hazardous Chemicals in Laboratories URL: https://hazcomfast.com/osha-standard/1910-1450-chemical-hygiene-plan 29 CFR 1910.1450, the OSHA Laboratory standard, protects workers who use hazardous chemicals in laboratories on a laboratory scale. Instead of the full HazCom and substance-specific rules, it requires each lab to develop and follow a written Chemical Hygiene Plan (CHP) that keeps exposures below OSHA limits, plus employee information and training, exposure determination where needed, and medical consultation. Regulation text (verbatim, 29 CFR 1910.1450(e)(1)): Where hazardous chemicals as defined by this standard are used in the workplace, the employer shall develop and carry out the provisions of a written Chemical Hygiene Plan which is: (i) Capable of protecting employees from health hazards associated with hazardous chemicals in that laboratory and (ii) Capable of keeping exposures below the limits specified in paragraph (c) of this section. ## Glossary (222 terms) ### Abatement URL: https://hazcomfast.com/glossary/abatement The action an employer takes to fix a cited violation or eliminate a hazard OSHA identified during an inspection. The citation sets an abatement date, the deadline to correct the hazard, and within 10 calendar days after that date the employer must certify to OSHA that the violation was abated. Failure to abate accrues additional penalties of up to $16,550 per day. Reference: 29 CFR 1903.19 Regulation text (verbatim, 29 CFR 1903.19(b)(1)): Abatement means action by an employer to comply with a cited standard or regulation or to eliminate a recognized hazard identified by OSHA during an inspection. ### Arc Flash URL: https://hazcomfast.com/glossary/arc-flash An arc flash is the sudden release of thermal energy from an electrical arc fault — a short circuit that jumps through the air between energized parts. The arc can reach temperatures over 35,000°F (nearly four times the surface of the sun), causing severe burns, igniting clothing, and driving an explosive pressure wave known as the arc blast. OSHA sets no single “arc-flash standard”: the analysis method — the arc-flash boundary, incident energy, and arc-rated PPE — comes from the NFPA 70E consensus standard, which OSHA enforces through its electrical-PPE rules (29 CFR 1910.335, 1910.269) and the General Duty Clause. Reference: 29 CFR 1910.335(a)(1)(v); 1910.269(l)(8) (NFPA 70E is the consensus method) Regulation text (verbatim, 29 CFR 1910.335(a)(1)(v)): Employees shall wear protective equipment for the eyes or face wherever there is danger of injury to the eyes or face from electric arcs or flashes or from flying objects resulting from electrical explosion. ### Area Director URL: https://hazcomfast.com/glossary/area-director The senior OSHA official in charge of a specific OSHA Area Office — the local unit that runs inspections and enforcement in its geographic territory. The Area Director has the authority to issue citations, propose penalties, hold informal conferences with employers, and approve settlement agreements. When a Compliance Safety and Health Officer (CSHO) completes an inspection, it's the Area Director who ultimately issues the citation. Reference: 29 CFR 1903.14 (issuance of citation) Regulation text (verbatim, 29 CFR 1903.14(a)): If, on the basis of the report the Area Director believes that the employer has violated a requirement of section 5 of the Act, of any standard, rule or order promulgated pursuant to section 6 of the Act, or of any substantive rule published in this chapter, he shall, if appropriate, consult with the Regional Solicitor, and he shall issue to the employer either a citation or a notice of de minimis violations which have no direct or immediate relationship to safety or health. ### Bureau of Labor Statistics (BLS) URL: https://hazcomfast.com/glossary/bls The federal statistical agency within the U.S. Department of Labor that collects, analyzes, and publishes data on workplace injuries, illnesses, and fatalities. BLS conducts the annual Survey of Occupational Injuries and Illnesses (SOII) — compiled from employer OSHA 300 logs — and the Census of Fatal Occupational Injuries (CFOI). SOII data drives OSHA's Site-Specific Targeting (SST) program: establishments whose DART rates significantly exceed their BLS industry average are placed on the SST inspection list. Regulation text (verbatim, 29 CFR 1904.42(a) — Requests from the Bureau of Labor Statistics for data): If you receive a Survey of Occupational Injuries and Illnesses Form from the Bureau of Labor Statistics (BLS), or a BLS designee, you must promptly complete the form and return it following the instructions contained on the survey form. ### Competent Person URL: https://hazcomfast.com/glossary/competent-person Under OSHA's construction standards, a person who is capable of identifying existing and predictable hazards in the surroundings or working conditions, and who has the authorization to take prompt corrective measures to eliminate them. The role requires both knowledge and the authority to act, and is mandated by name in many specific standards — excavations, scaffolds, fall protection, asbestos, and more. Reference: 29 CFR 1926.32(f) Regulation text (verbatim, 29 CFR 1926.32(f)): Competent person means one who is capable of identifying existing and predictable hazards in the surroundings or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them. ### Citation URL: https://hazcomfast.com/glossary/citation The formal written notice OSHA issues to an employer after an inspection, describing each alleged violation, the standard cited, the proposed penalty, and the date by which the hazard must be corrected (abated). OSHA must issue a citation with reasonable promptness and no later than six months after the violation occurred. Reference: OSH Act §9 / 29 CFR 1903.14 Regulation text (summary, OSH Act §9(a)): If, upon inspection or investigation, the Secretary believes that an employer has violated a requirement of section 5 of this Act … he shall with reasonable promptness issue a citation to the employer. Each citation … shall describe with particularity the nature of the violation. ### Closing Conference URL: https://hazcomfast.com/glossary/closing-conference The meeting at the end of an OSHA inspection where the compliance officer confers with the employer and informally advises them of any apparent violations found. Importantly, the closing conference discusses what was observed and the employer's rights — but it does NOT state final citations or penalties, which come later in the written Citation and Notification of Penalty. Reference: 29 CFR 1903.7(e) Regulation text (verbatim, 29 CFR 1903.7(e)): At the conclusion of an inspection, the Compliance Safety and Health Officer shall confer with the employer or his representative and informally advise him of any apparent safety or health violations disclosed by the inspection. ### Compliance Officer (CSHO) URL: https://hazcomfast.com/glossary/compliance-officer An OSHA Compliance Safety and Health Officer — the inspector who conducts workplace inspections. A CSHO presents credentials (a photo ID and a serial number), holds the opening conference, performs the walkaround, collects evidence, interviews employees, and recommends citations. CSHOs are either safety specialists or industrial hygienists. Reference: 29 CFR 1903.7 Regulation text (verbatim, 29 CFR 1903.7(a)): At the beginning of an inspection, Compliance Safety and Health Officers shall present their credentials to the owner, operator, or agent in charge at the establishment; explain the nature and purpose of the inspection; and indicate generally the scope of the inspection and the records specified in § 1903.3 which they wish to review. ### Contest URL: https://hazcomfast.com/glossary/contest An employer's formal challenge to an OSHA citation, penalty, or abatement date. To contest, the employer must file a written Notice of Contest with the OSHA Area Director within 15 working days of receiving the Citation and Notification of Penalty. Filing sends the case to the independent Occupational Safety and Health Review Commission (OSHRC); missing the deadline makes the citation a final, un-appealable order. Reference: 29 CFR 1903.17 Regulation text (verbatim, 29 CFR 1903.17(a)): Any employer to whom a citation or notice of proposed penalty has been issued may, under section 10(a) of the Act, notify the Area Director in writing that he intends to contest such citation or proposed penalty before the Review Commission. Such notice of intention to contest shall be postmarked within 15 working days of the receipt by the employer of the notice of proposed penalty. ### DART Rate URL: https://hazcomfast.com/glossary/dart-rate Days Away, Restricted, or Transferred rate — an injury-rate metric from OSHA 300-Log data: (number of DART cases × 200,000) ÷ total hours worked. DART cases are those with days away from work (Column H) plus those with job transfer or restriction (Column I). OSHA uses it to target inspections at higher-injury establishments. Reference: 29 CFR 1904 ### De Minimis Violation URL: https://hazcomfast.com/glossary/de-minimis-violation A technical deviation from an OSHA standard that has no direct or immediate relationship to safety or health. Because there's no real hazard, a de minimis condition carries no penalty and no abatement requirement, and it isn't included on the citation — the compliance officer simply notes it to the employer. Reference: OSHA Field Operations Manual Regulation text (summary, OSHA — Field Operations Manual (de minimis)): De minimis conditions are those where an employer has implemented a measure different from one specified in a standard, that has no direct or immediate relationship to safety or health. De minimis notices are not part of the citation and do not require abatement or carry a penalty. ### Egregious Violations URL: https://hazcomfast.com/glossary/egregious-violations OSHA's violation-by-violation (per-instance) citation approach, under which each instance of noncompliance is cited as a separate violation with its own penalty rather than being grouped into one. Historically reserved for willful violations, it can turn a single inspection into millions of dollars in penalties. A 2023 policy expanded instance-by-instance citations to certain serious, repeat, and other-than-serious violations too. Reference: OSHA CPL 02-00-080 (EEEP) Regulation text (summary, OSHA CPL 02-00-080): Under the egregious (violation-by-violation) penalty procedure, each instance of noncompliance is treated as a separate violation with a separate penalty; the procedure applies to willful violations of OSHA standards or regulations or of the General Duty Clause. ### Employer URL: https://hazcomfast.com/glossary/employer Under the OSH Act (Section 3(5)), an employer is “a person engaged in a business affecting commerce who has employees,” excluding the federal government and states/political subdivisions. The employer is the party that carries OSHA's core duties — complying with all applicable standards and the General Duty Clause, and keeping the workplace free of recognized hazards. Self-employed individuals with no employees are generally not covered. Reference: OSH Act Section 3(5) Regulation text (summary, OSH Act §3(5)): The term “employer” means a person engaged in a business affecting commerce who has employees, but does not include the United States ... or any State or political subdivision of a State. ### Experience Modification Rate (EMR) URL: https://hazcomfast.com/glossary/emr A workers' compensation insurance multiplier that adjusts an employer's premium to reflect its own claims history versus the average for its industry. An EMR of 1.0 is average; above 1.0 means worse-than-average losses and a higher premium; below 1.0 means better-than-average and a lower premium. It's set by rating bureaus (NCCI or a state bureau), not by OSHA. Regulation text (summary, NCCI — Experience Rating Plan): The experience rating modification adjusts a workers' compensation premium to reflect an individual employer's own loss experience compared with the average expected for employers in the same industry classification. ### Failure-to-Abate URL: https://hazcomfast.com/glossary/failure-to-abate A violation that exists when an employer does not correct a previously cited hazard by the abatement date on the citation. Because the hazard was already identified and the employer had time to fix it, OSHA can assess a penalty of up to $16,550 per day for each day the violation continues past the deadline, a running penalty that can quickly exceed the original fine. OSHA's Field Operations Manual caps the total at 30 times the daily amount. Reference: 29 CFR 1903.18 (the penalty amount is 29 CFR 1903.15(d)(5)) Regulation text (verbatim, 29 CFR 1903.18(a): notification of failure to correct (the per-day amount is 29 CFR 1903.15(d)(5))): If an inspection discloses that an employer has failed to correct an alleged violation for which a citation has been issued within the period permitted for its correction, the Area Director shall, if appropriate, consult with the Regional Solicitor, and he shall notify the employer by certified mail or by personal service by the Compliance Safety and Health Officer of such failure and of the additional penalty proposed under § 1903.15(d)(5) by reason of such failure. ### General Duty Clause URL: https://hazcomfast.com/glossary/general-duty-clause Section 5(a)(1) of the OSH Act, which requires every employer to provide a workplace free from recognized hazards likely to cause death or serious physical harm — even when no specific OSHA standard covers the hazard. It is OSHA's catch-all enforcement tool for hazards like heat, ergonomics, and workplace violence that have no dedicated rule. Reference: OSH Act Section 5(a)(1) Regulation text (summary, OSH Act §5(a)(1)): Each employer shall furnish to each of his employees employment and a place of employment which are free from recognized hazards that are causing or are likely to cause death or serious physical harm to his employees. ### Good Faith Reduction URL: https://hazcomfast.com/glossary/good-faith-reduction A reduction of up to 25% that OSHA may apply to a proposed penalty when an employer demonstrates a genuine, effective commitment to safety — chiefly a documented, implemented safety and health management program. It's one of three serial penalty reductions (size, good faith, history) OSHA applies to the Gravity-Based Penalty. Reference: OSHA Field Operations Manual, Ch. 6 Regulation text (summary, OSHA — Field Operations Manual, Chapter 6): A penalty reduction of up to 25 percent may be applied based on the employer's good faith, primarily reflected in an effective written safety and health management system; a reduced credit (e.g., 15 percent) may apply where the program has deficiencies. ### Hazard Communication Standard (HCS) URL: https://hazcomfast.com/glossary/hazard-communication-standard OSHA's standard (29 CFR 1910.1200) requiring that the hazards of all chemicals produced or imported are classified, and that the information is passed to employers and workers through labels, safety data sheets, and training. It is built on six pillars — a written program, a chemical list, labels, SDSs, training, and access — and is aligned with the GHS. Reference: 29 CFR 1910.1200 Regulation text (summary, 29 CFR 1910.1200(a)(1)): The purpose of this section is to ensure that the hazards of all chemicals produced or imported are classified, and that information concerning the classified hazards is transmitted to employers and employees. ### HazCom Program URL: https://hazcomfast.com/glossary/hazcom-program The written hazard communication program that 29 CFR 1910.1200(e) requires every employer with hazardous chemicals to develop, implement, and maintain at each workplace. It documents how the employer meets the three pillars of HazCom — labels and warnings, safety data sheets (SDSs), and employee information and training — and includes a list of the hazardous chemicals known to be present, tied to their SDSs by product identifier. Reference: 29 CFR 1910.1200(e) Regulation text (verbatim, 29 CFR 1910.1200(e)(1)): Employers shall develop, implement, and maintain at each workplace, a written hazard communication program which at least describes how the criteria ... for labels and other forms of warning, safety data sheets, and employee information and training will be met. ### HCS 2024 Compliance Deadlines URL: https://hazcomfast.com/glossary/hcs-2024-deadlines The phased dates by which the 2024 update to OSHA's Hazard Communication Standard (aligning with GHS Revision 7) must be met. A January 15, 2026 final rule (FR Doc. 2026-00653 (Jan 15, 2026), +4 months) extended every original deadline by four months — these are the dates now in force under 29 CFR 1910.1200(j): substances — manufacturers, importers, and distributors by May 19, 2026 (j)(2)(i); substances — employers (as necessary: alternative workplace labeling used under (f)(6), written program, and training for newly identified hazards) by November 20, 2026 (j)(2)(ii); mixtures — manufacturers, importers, and distributors by November 19, 2027 (j)(3)(i); mixtures — employers by May 19, 2028 (j)(3)(ii). During the interim, parties may comply with the 2012 HCS, the 2024 HCS, or both. Reference: 29 CFR 1910.1200(j) Regulation text (verbatim, 29 CFR 1910.1200(j)(2)(ii)): For substances, all employers shall, as necessary, update any alternative workplace labeling used under paragraph (f)(6) of this section, update the hazard communication program required by paragraph (h)(1) of this section, and provide any additional employee training in accordance with paragraph (h)(3) of this section for newly identified physical hazard, or health hazards or other hazards covered under this section no later than November 20, 2026. ### Imminent Danger URL: https://hazcomfast.com/glossary/imminent-danger A workplace condition or practice where a danger exists that could reasonably be expected to cause death or serious physical harm immediately — or before it could be eliminated through OSHA's normal enforcement procedures. It's OSHA's highest-priority situation: workers can request an immediate inspection, and OSHA can go to federal court to shut the hazard down. Reference: OSH Act Section 13 Regulation text (summary, OSH Act §13(a)): Any conditions or practices in any place of employment which are such that a danger exists which could reasonably be expected to cause death or serious physical harm immediately or before the imminence of such danger can be eliminated through the enforcement procedures otherwise provided by this Act. ### Informal Conference URL: https://hazcomfast.com/glossary/informal-conference An optional meeting between an employer and the OSHA Area Director, held after a citation is issued, to discuss the citation, penalties, abatement dates, or the facts of the case — and often to reach an informal settlement. It should be requested within the 15-working-day response window, but it does NOT extend the deadline to file a formal Notice of Contest. Reference: OSHA — post-citation procedures (FOM) Regulation text (summary, OSHA — Employer Rights (post-citation)): An employer may request an informal conference with the OSHA Area Director to discuss the citation, proposed penalties, abatement dates, or any other issue, and to work toward an informal settlement of the case. ### Multi-Employer Worksite URL: https://hazcomfast.com/glossary/multi-employer-worksite A worksite where employees of more than one employer are present, the norm on construction projects. Under OSHA's Multi-Employer Citation Policy (CPL 02-00-124), more than one employer can be cited for a single hazard, based on four roles: the creating, exposing, correcting and controlling employer. A general contractor can be cited for a subcontractor's hazard when it failed to use reasonable care to prevent and detect it. Reference: OSHA CPL 02-00-124 Regulation text (summary, OSHA CPL 02-00-124): On multi-employer worksites (in all industry sectors), more than one employer may be citable for a hazardous condition that violates an OSHA standard. A two-step process must be followed in determining whether more than one employer is to be cited. ### National Emphasis Program (NEP) URL: https://hazcomfast.com/glossary/national-emphasis-program An OSHA enforcement initiative that concentrates inspection resources on a specific high-hazard industry, process, or substance for a set period. NEPs are how OSHA proactively targets known killers — silica, heat, amputations, combustible dust — driving programmed inspections and specific inspection procedures rather than waiting for a complaint. Reference: OSHA Directives (NEP) Regulation text (summary, OSHA — National Emphasis Programs): National Emphasis Programs (NEPs) are temporary programs that focus OSHA's resources on particular hazards and high-hazard industries. Existing and potential new emphasis programs are evaluated using inspection data, injury and illness data, and other information. ### Opening Conference URL: https://hazcomfast.com/glossary/opening-conference The meeting that starts an OSHA inspection. The compliance officer presents credentials, explains why the establishment was selected and the scope of the inspection, describes the walkaround procedures and employee-representation rights, and answers questions — before beginning the walkaround. It's the employer's first chance to understand and shape how the inspection will proceed. Reference: 29 CFR 1903.7 / OSHA FOM Regulation text (summary, OSHA — inspection process (FOM)): During the opening conference, the compliance officer explains why the establishment was selected, describes the scope of the inspection, walkaround procedures, employee representation, and employee interviews; the walkaround begins as soon as the opening conference is completed. ### OSHA 300 Log URL: https://hazcomfast.com/glossary/osha-300-log The Log of Work-Related Injuries and Illnesses (Form 300) — the running list where an employer records each recordable case during the year, with a one- or two-line description and a classification of the outcome (death, days away, restricted/transfer, or other). It must be kept for 5 years and updated as cases develop. Reference: 29 CFR 1904.29 Regulation text (verbatim, 29 CFR 1904.29(b)(3)): You must enter each recordable injury or illness on the OSHA 300 Log and 301 Incident Report within seven (7) calendar days of receiving information that a recordable injury or illness has occurred. ### OSHA 300A URL: https://hazcomfast.com/glossary/osha-300a The annual Summary of Work-Related Injuries and Illnesses (Form 300A) — the year-end totals from the 300 Log. A company executive must certify it, and it must be posted in the workplace from February 1 through April 30 of the following year. Covered establishments must also submit it electronically to OSHA by March 2. Reference: 29 CFR 1904.32 Regulation text (verbatim, 29 CFR 1904.32(a)): At the end of each calendar year, you must: (1) Review the OSHA 300 Log to verify that the entries are complete and accurate, and correct any deficiencies identified; (2) Create an annual summary of injuries and illnesses recorded on the OSHA 300 Log; (3) Certify the summary; and (4) Post the annual summary. ### OSHA 301 URL: https://hazcomfast.com/glossary/osha-301 The Injury and Illness Incident Report (Form 301) — the detailed record behind a single recordable case. It captures what happened, the body part affected, the object/substance involved, and the treatment, and must be completed within 7 calendar days of learning of a recordable case. It's the third of OSHA's three recordkeeping forms, alongside the 300 Log and 300A summary. Reference: 29 CFR 1904.29 Regulation text (verbatim, 29 CFR 1904.29(a)): You must use OSHA 300, 300-A, and 301 forms, or equivalent forms, for recordable injuries and illnesses. ### OSHRC URL: https://hazcomfast.com/glossary/oshrc The Occupational Safety and Health Review Commission — an independent federal agency, separate from OSHA and the Department of Labor, that adjudicates disputes when an employer contests an OSHA citation or proposed penalty. Created by the Occupational Safety and Health Act of 1970, OSHRC provides two levels of review: a case is first heard by an Administrative Law Judge (ALJ), whose decision becomes final after 30 days unless one of the three presidentially-appointed Commissioners directs review by the full Commission. Commission decisions may then be appealed to a U.S. Court of Appeals. Reference: OSH Act §12 (29 U.S.C. 661); §10 (contest procedure) Regulation text (summary, OSH Act §10(a) (29 U.S.C. 659(a))): The employer has fifteen working days within which to notify the Secretary that he wishes to contest the citation or proposed assessment of penalty... If, within fifteen working days from the receipt of the notice issued by the Secretary the employer fails to notify the Secretary that he intends to contest the citation or proposed assessment of penalty... the citation and the assessment, as proposed, shall be deemed a final order of the Commission and not subject to review by any court or agency. ### Other-Than-Serious Violation URL: https://hazcomfast.com/glossary/other-than-serious-violation An OSHA violation that has a direct relationship to job safety and health but is not likely to cause death or serious physical harm. Unlike a serious violation, its penalty is discretionary — OSHA may propose up to $16,550, but often reduces it, sometimes to zero. It sits between a de minimis violation (no penalty) and a serious violation (mandatory penalty). Reference: 29 CFR 1903.15 Regulation text (verbatim, 29 CFR 1903.15(d)(4)): Other-than-serious violation. The penalty for an other-than-serious violation under section 17(c) of the Act, 29 U.S.C. 666(c), shall not exceed $16,550. ### Penalty URL: https://hazcomfast.com/glossary/penalty The monetary fine OSHA proposes for a violation. In 2026, maximums are $16,550 per serious or other-than-serious violation and $165,514 per willful or repeated violation — unchanged from 2025 (no CPI adjustment). The proposed amount starts from a Gravity-Based Penalty (severity × probability) and is then reduced for employer size, good faith, and inspection history. Reference: 29 CFR 1903.15 Regulation text (verbatim, 29 CFR 1903.15(b)): The Area Director shall determine the amount of any proposed penalty, giving due consideration to the appropriateness of the penalty with respect to the size of the business of the employer being charged, the gravity of the violation, the good faith of the employer, and the history of previous violations, in accordance with the provisions of section 17 of the Act and paragraph (d) of this section. ### Permissible Exposure Limit (PEL) URL: https://hazcomfast.com/glossary/permissible-exposure-limit The maximum amount or concentration of a chemical (or other harmful agent) a worker may legally be exposed to under OSHA regulations, almost always expressed as an 8-hour time-weighted average (TWA). Example: the PEL for respirable crystalline silica is 50 µg/m³ as an 8-hour TWA (29 CFR 1926.1153). Reference: 29 CFR 1910.1000 Regulation text (verbatim, 29 CFR 1910.1000(a)(1)–(2)): An employee's exposure to any substance in Table Z-1, the exposure limit of which is preceded by a “C”, shall at no time exceed the exposure limit given for that substance. … An employee's exposure to any substance in Table Z-1, the exposure limit of which is not preceded by a “C”, shall not exceed the 8-hour Time Weighted Average given for that substance in any 8-hour work shift of a 40-hour work week. ### Programmed Inspection URL: https://hazcomfast.com/glossary/programmed-inspection An OSHA inspection selected in advance using objective criteria — high injury/illness rates, a National or Local Emphasis Program, or neutral scheduling plans — rather than being triggered by a specific event or complaint. Programmed inspections are the lowest of OSHA's four inspection priorities, coming after imminent danger, fatalities/catastrophes, and complaints/referrals. Reference: OSHA Field Operations Manual Regulation text (summary, OSHA — inspection priorities (FOM)): Programmed inspections are aimed at specific high-hazard industries or occupations, and are conducted according to objective selection criteria; they follow imminent danger, fatality/catastrophe, and complaint/referral inspections in OSHA's order of priority. ### Qualified Person URL: https://hazcomfast.com/glossary/qualified-person In OSHA construction terms (29 CFR 1926.32(m)), a qualified person is someone who — by a recognized degree, certificate, or professional standing, or by extensive knowledge, training, and experience — has demonstrated the ability to solve or resolve problems relating to the subject matter, the work, or the project. The defining trait is expertise. It's distinct from a “competent person,” whose defining trait is the authority to identify hazards and take prompt corrective action. Reference: 29 CFR 1926.32(m) Regulation text (verbatim, 29 CFR 1926.32(m)): Qualified means one who, by possession of a recognized degree, certificate, or professional standing, or who by extensive knowledge, training, and experience, has successfully demonstrated his ability to solve or resolve problems relating to the subject matter, the work, or the project. ### Recognized Hazard URL: https://hazcomfast.com/glossary/recognized-hazard A workplace hazard that is known to be dangerous — recognized by the specific employer, by the industry generally, or by common sense. “Recognition” is the linchpin element of a General Duty Clause citation: OSHA can only cite an uncovered hazard under 5(a)(1) if it can show the hazard was recognized. Reference: OSH Act Section 5(a)(1) Regulation text (summary, OSH Act §5(a)(1)): Each employer shall furnish … a place of employment which are free from recognized hazards that are causing or are likely to cause death or serious physical harm to his employees. ### Recordable Injury URL: https://hazcomfast.com/glossary/recordable-injury A work-related injury or illness an employer must enter on the OSHA 300 Log because it meets one of the general recording criteria in 29 CFR 1904.7: death, days away from work, restricted work or job transfer, medical treatment beyond first aid, loss of consciousness, or a significant injury/illness diagnosed by a physician or licensed health care professional. Reference: 29 CFR 1904.7 Regulation text (verbatim, 29 CFR 1904.7(a)): You must consider an injury or illness to meet the general recording criteria, and therefore to be recordable, if it results in any of the following: death, days away from work, restricted work or transfer to another job, medical treatment beyond first aid, or loss of consciousness. You must also consider a case to meet the general recording criteria if it involves a significant injury or illness diagnosed by a physician or other licensed health care professional, even if it does not result in death, days away from work, restricted work or job transfer, medical treatment beyond first aid, or loss of consciousness. ### Repeat Violation URL: https://hazcomfast.com/glossary/repeat-violation A violation of any OSHA standard where the employer has already been cited for a substantially similar condition — and that earlier citation has become a final order — within the past 5 years. Because it signals a pattern, it carries penalties up to $165,514 per violation, the same maximum as a willful violation. Reference: 29 CFR 1903.15 / OSHA FOM Regulation text (summary, OSHA Field Operations Manual): A repeated violation exists when an employer has been cited previously for a substantially similar condition or hazard and the prior citation has become a final order. ### Serious Violation URL: https://hazcomfast.com/glossary/serious-violation An OSHA violation where there is a substantial probability that death or serious physical harm could result, and the employer knew or, with reasonable diligence, should have known about the hazard. It carries a mandatory penalty up to $16,550 per violation and is the classification behind most OSHA citations. Reference: OSH Act §17(k) Regulation text (summary, OSH Act §17(k)): A serious violation shall be deemed to exist in a place of employment if there is a substantial probability that death or serious physical harm could result … unless the employer did not, and could not with the exercise of reasonable diligence, know of the presence of the violation. ### Variance URL: https://hazcomfast.com/glossary/variance An official OSHA authorization to deviate from a specific standard's requirements. To get one, an employer must generally show that its alternative conditions, methods, or processes protect workers at least as well as the standard would. OSHA's variance program (29 CFR Part 1905) recognizes four types: temporary, permanent, experimental, and national defense. Reference: 29 CFR Part 1905 Regulation text (summary, OSH Act §6(d) / 29 CFR 1905): A permanent variance may be granted where the employer demonstrates that the conditions, practices, means, methods, operations, or processes used or proposed will provide employment and places of employment as safe and healthful as those required by the standard. ### Voluntary Protection Programs (VPP) URL: https://hazcomfast.com/glossary/vpp OSHA's programs that recognize employers and worksites with exemplary, effective safety and health management systems. Participants (at the Star, Merit, or Demonstration level) partner with OSHA, must maintain injury and illness rates below their industry's national averages, and are removed from OSHA's programmed inspection list while in good standing. Reference: OSHA — VPP (CSP 03-01-005) Regulation text (summary, OSHA — Voluntary Protection Programs): The Voluntary Protection Programs recognize employers and workers who have implemented effective safety and health management systems and maintain injury and illness rates below the national Bureau of Labor Statistics averages for their respective industries. ### Whistleblower Protection URL: https://hazcomfast.com/glossary/whistleblower-protection Section 11(c) of the OSH Act, which makes it illegal for an employer to fire or otherwise retaliate against a worker for exercising safety and health rights — filing an OSHA complaint, participating in an inspection, reporting an injury, requesting records, or raising a safety concern. A worker who is retaliated against must file an 11(c) complaint with OSHA within 30 days. Reference: OSH Act Section 11(c) Regulation text (summary, OSH Act §11(c)(1)): No person shall discharge or in any manner discriminate against any employee because such employee has filed any complaint or instituted … any proceeding under or related to this Act or has testified … or because of the exercise by such employee … of any right afforded by this Act. ### Willful Violation URL: https://hazcomfast.com/glossary/willful-violation The most serious OSHA classification: a violation the employer commits intentionally and knowingly, or with plain indifference to the law. Penalties range from $11,823 to $165,514 per violation (2026), and a willful violation that causes a worker's death can also trigger criminal prosecution. Reference: 29 CFR 1903.15 / OSHA FOM Regulation text (summary, OSHA Field Operations Manual): A willful violation exists where the evidence shows either an intentional, knowing, or voluntary disregard for the requirements of the Act, or plain indifference to employee safety and health. ### Acute Toxicity URL: https://hazcomfast.com/glossary/acute-toxicity A GHS health-hazard class for the harmful effects that follow a single dose, several doses within 24 hours, or a 4-hour inhalation exposure. Chemicals are sorted into categories by route (oral, dermal, inhalation) using LD50/LC50 cut-offs — Category 1 is the most toxic. OSHA's HazCom standard uses Categories 1–4. Reference: 29 CFR 1910.1200 App A.1 Regulation text (summary, 29 CFR 1910.1200 App A.1.1): Acute toxicity refers to those adverse effects occurring following oral or dermal administration of a single dose of a substance, or multiple doses given within 24 hours, or an inhalation exposure of 4 hours. ### Aspiration Hazard URL: https://hazcomfast.com/glossary/aspiration-hazard A GHS health-hazard class for chemicals that can be fatal if swallowed and then enter the airways — directly or by vomiting — causing chemical pneumonia or lung injury. Thin, low-viscosity hydrocarbons (gasoline, kerosene, lamp oil) are the classic example. It is Category 1, with the health-hazard pictogram (GHS08) and signal word “Danger.” Reference: 29 CFR 1910.1200 App A.10 Regulation text (verbatim, 29 CFR 1910.1200 App A.10.1.1): Aspiration means the entry of a liquid or solid chemical directly through the oral or nasal cavity, or indirectly from vomiting, into the trachea and lower respiratory system. ### Carcinogenicity URL: https://hazcomfast.com/glossary/carcinogenicity A GHS health-hazard class for chemicals that cause cancer or increase its incidence. GHS (and OSHA's HazCom standard) sorts carcinogens into Category 1A (known human carcinogen), 1B (presumed, from animal evidence), and Category 2 (suspected). Carcinogens carry the health-hazard pictogram (GHS08) and a hazard statement such as H350 (“May cause cancer”). Reference: 29 CFR 1910.1200 App A.6 Regulation text (verbatim, 29 CFR 1910.1200 App A.6.1): Carcinogenicity refers to the induction of cancer or an increase in the incidence of cancer occurring after exposure to a substance or mixture. ### Chemicals Under Pressure URL: https://hazcomfast.com/glossary/chemicals-under-pressure A physical-hazard class added by OSHA's 2024 HCS update (aligning with GHS Revision 7) for liquids or solids pressurized with a gas, held in pressure receptacles other than aerosol dispensers and not classified as gases under pressure. It is categorized by the flammability of its contents and always carries the gas-cylinder pictogram (GHS04) for the pressure hazard. Reference: 29 CFR 1910.1200 App B.3.2 (Chemicals Under Pressure) — HCS 2024 Regulation text (summary, 29 CFR 1910.1200 App B.3.2.1): Chemicals under pressure are liquids or solids (e.g., pastes or powders), pressurized with a gas at a pressure of 200 kPa (gauge) or more at 20 °C in pressure receptacles other than aerosol dispensers and which are not classified as gases under pressure. ### Classification URL: https://hazcomfast.com/glossary/classification The process of evaluating the available scientific evidence for a chemical against the GHS criteria to decide whether it is hazardous and, if so, the hazard class and category of each effect. Classification is the first step in HazCom — its result determines every label element (pictogram, signal word, hazard and precautionary statements) and SDS content. Reference: 29 CFR 1910.1200(d) Regulation text (verbatim, 29 CFR 1910.1200(c)): Classification means to identify the relevant data regarding the hazards of a chemical; review those data to ascertain the hazards associated with the chemical; and decide whether the chemical will be classified as hazardous according to the definition of hazardous chemical in this section. In addition, classification for health and physical hazards includes the determination of the degree of hazard, where appropriate, by comparing the data with the criteria for health and physical hazards. ### Corrosive to Metals URL: https://hazcomfast.com/glossary/corrosive-to-metals A GHS physical-hazard class for chemicals that, by chemical action, will materially damage or even destroy metals. It is a single category (Category 1), determined by corrosion-rate testing on steel and aluminum, and uses the corrosion pictogram (GHS05) with the hazard statement H290. It is a separate hazard from skin corrosion, even though both use GHS05. Reference: 29 CFR 1910.1200 App B.16 Regulation text (verbatim, 29 CFR 1910.1200 App B.16.1): A chemical which is corrosive to metals means a chemical which by chemical action will materially damage, or even destroy, metals. ### Desensitized Explosives URL: https://hazcomfast.com/glossary/desensitized-explosives A physical-hazard class added by OSHA's 2024 HCS update (GHS Revision 7) for solid or liquid explosives that have been phlegmatized — wetted or diluted — to suppress their explosive properties for safe transport and storage. It has four categories based on the corrected burning rate, and uses the flame pictogram (GHS02), not the exploding-bomb. Reference: 29 CFR 1910.1200 App B.17 Regulation text (summary, 29 CFR 1910.1200 App B.17.1): Desensitized explosives are solid or liquid explosive chemicals which are phlegmatized to suppress their explosive properties in such a manner that they do not mass explode and do not burn too rapidly and therefore may be exempted from the hazard class “Explosives”. ### Globally Harmonized System (GHS) URL: https://hazcomfast.com/glossary/ghs An internationally agreed framework created by the United Nations (first adopted in 2003) that standardizes how chemical hazards are classified and communicated — using common hazard classes, pictograms, signal words (Danger / Warning), and coded hazard (H) and precautionary (P) statements on labels and safety data sheets. The US adopted GHS into law through OSHA's 2012 Hazard Communication Standard update. Regulation text (summary, 29 CFR 1910.1200 (HCS, GHS-aligned)): OSHA modified the Hazard Communication Standard to conform to the United Nations' Globally Harmonized System of Classification and Labelling of Chemicals — providing a single, standardized approach to classifying chemicals and communicating hazard information on labels and safety data sheets. ### GHS Revision 7 URL: https://hazcomfast.com/glossary/ghs-revision-7 The 7th revision of the UN Globally Harmonized System, which OSHA adopted in its 2024 update to the Hazard Communication Standard (with selected elements of Revision 8). It adds new hazard classes — desensitized explosives and chemicals under pressure — folds pyrophoric and chemically unstable gases into flammable gases, and updates label and SDS provisions. The final rule was effective July 19, 2024, with phased compliance dates. Reference: 29 CFR 1910.1200 (2024 HCS Final Rule) Regulation text (summary, OSHA — 2024 HCS Final Rule): OSHA is modifying its Hazard Communication Standard to maintain alignment with the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) and to address issues that arose during implementation of the 2012 standard. ### GHS01 (Exploding Bomb) URL: https://hazcomfast.com/glossary/ghs01 The GHS hazard pictogram showing an exploding bomb. It's used for explosives (unstable explosives and Divisions 1.1–1.4), self-reactive substances Types A and B, and organic peroxides Types A and B — hazards that can mass-explode or throw fire, blast, or projectiles. On US labels it appears inside the red diamond frame. Reference: 29 CFR 1910.1200 App C Regulation text (summary, OSHA HCS — hazard statements (App C)): H201: Explosive; mass explosion hazard. H240: Heating may cause an explosion. ### GHS02 (Flame) URL: https://hazcomfast.com/glossary/ghs02 The GHS hazard pictogram showing a flame. It covers the whole family of fire hazards: flammable gases, aerosols, liquids, and solids; pyrophoric (auto-igniting) liquids and solids; self-heating substances; substances that emit flammable gas when wet; the less-reactive self-reactives and organic peroxides (Types C–F); and desensitized explosives. Reference: 29 CFR 1910.1200 App C Regulation text (summary, OSHA HCS — hazard statements (App C)): H225: Highly flammable liquid and vapor. H228: Flammable solid. H250: Catches fire spontaneously if exposed to air. ### GHS03 (Flame Over Circle) URL: https://hazcomfast.com/glossary/ghs03 The GHS hazard pictogram showing a flame over a circle. It marks oxidizers — oxidizing gases, liquids, and solids — which can cause or intensify a fire or explosion by releasing oxygen, even when they don't burn themselves. It's one of OSHA's eight required workplace pictograms. Reference: 29 CFR 1910.1200 App C Regulation text (summary, OSHA HCS — hazard statements (App C)): H270: May cause or intensify fire; oxidizer. H271: May cause fire or explosion; strong oxidizer. H272: May intensify fire; oxidizer. ### GHS04 (Gas Cylinder) URL: https://hazcomfast.com/glossary/ghs04 The GHS hazard pictogram showing a gas cylinder. It marks gases under pressure — compressed, liquefied, refrigerated liquefied, and dissolved gases — which can violently rupture or explode if heated, and, for refrigerated gases, cause cryogenic burns. The new chemicals-under-pressure class also uses it. Reference: 29 CFR 1910.1200 App C Regulation text (summary, OSHA HCS — hazard statements (App C)): H280: Contains gas under pressure; may explode if heated. H281: Contains refrigerated gas; may cause cryogenic burns or injury. ### GHS05 (Corrosion) URL: https://hazcomfast.com/glossary/ghs05 The GHS hazard pictogram showing a hand and a surface being eaten away. It covers three “corrosion” hazards: skin corrosion (Category 1), serious eye damage (Category 1), and corrosive to metals (Category 1). It signals a substance that chemically destroys living tissue and/or metals. Reference: 29 CFR 1910.1200 App C Regulation text (summary, OSHA HCS — hazard statements (App C)): H314: Causes severe skin burns and eye damage. H318: Causes serious eye damage. H290: May be corrosive to metals. ### GHS06 (Skull and Crossbones) URL: https://hazcomfast.com/glossary/ghs06 The GHS hazard pictogram showing a skull and crossbones. It marks the more severe acute toxicity — Categories 1, 2, and 3 by oral, dermal, or inhalation route — chemicals that can be fatal or toxic from a small, single exposure. The milder Category 4 (“harmful”) uses the exclamation mark (GHS07) instead. Reference: 29 CFR 1910.1200 App C Regulation text (summary, OSHA HCS — hazard statements (App C)): H300: Fatal if swallowed. H310: Fatal in contact with skin. H330: Fatal if inhaled. H301/H311/H331: Toxic if swallowed / in contact with skin / if inhaled. ### GHS07 (Exclamation Mark) URL: https://hazcomfast.com/glossary/ghs07 The GHS hazard pictogram showing an exclamation mark. It flags the less-severe hazards: acute toxicity Category 4 (“harmful”), skin and eye irritation (Category 2), skin sensitization, respiratory tract irritation and narcotic effects (STOT single-exposure Category 3). The international GHS also assigns ozone-layer hazards to this symbol, but OSHA's Appendix C does not carry that class, so it never appears on a US workplace label. It is not used for the serious chronic hazards, which use the health-hazard pictogram (GHS08). Reference: 29 CFR 1910.1200 App C Regulation text (summary, OSHA HCS — hazard statements (App C)): H302: Harmful if swallowed. H315: Causes skin irritation. H319: Causes serious eye irritation. H317: May cause an allergic skin reaction. H335: May cause respiratory irritation. ### GHS08 (Health Hazard) URL: https://hazcomfast.com/glossary/ghs08 The GHS hazard pictogram showing a human silhouette with a starburst on the chest. It flags the serious, often long-term health hazards: carcinogenicity, germ cell mutagenicity, reproductive toxicity, respiratory sensitization, specific target organ toxicity (STOT), and aspiration hazard. It's the pictogram for hazards that can cause cancer, organ damage, or lasting harm. Reference: 29 CFR 1910.1200 App C Regulation text (summary, OSHA HCS — hazard statements (App C)): H350: May cause cancer. H340: May cause genetic defects. H360: May damage fertility or the unborn child. H334: May cause allergy or asthma symptoms … if inhaled. H370: Causes damage to organs. H304: May be fatal if swallowed and enters airways. ### GHS09 (Environment) URL: https://hazcomfast.com/glossary/ghs09 The GHS hazard pictogram showing a dead tree and a dead fish. It marks substances hazardous to the aquatic environment — acute Category 1 and chronic Categories 1–2. It's the one pictogram OSHA does NOT require on US workplace labels, because environmental hazards are outside OSHA's jurisdiction; it still appears on shipped containers and SDSs. Reference: 29 CFR 1910.1200 App C (voluntary in US) Regulation text (summary, OSHA HCS — hazard statements (App C)): H400: Very toxic to aquatic life. H410: Very toxic to aquatic life with long lasting effects. H411: Toxic to aquatic life with long lasting effects. ### Hazard Category URL: https://hazcomfast.com/glossary/hazard-category The division of severity within a GHS hazard class. Within a class, Category 1 is the most severe, with higher numbers less severe; some classes add sub-categories (1A, 1B). Categories compare severity only inside the same class — a Category 1 flammable is not “as bad as” a Category 1 carcinogen. Reference: 29 CFR 1910.1200(c) Regulation text (verbatim, 29 CFR 1910.1200(c)): Hazard category means the division of criteria within each hazard class, e.g., oral acute toxicity and flammable liquids include four hazard categories. These categories compare hazard severity within a hazard class and should not be taken as a comparison of hazard categories more generally. ### Hazard Class URL: https://hazcomfast.com/glossary/hazard-class The nature of a hazard a chemical presents — for example flammable liquid, oxidizer, acute toxicity, carcinogenicity, or aquatic toxicity. GHS groups hazard classes into physical, health, and environmental hazards (roughly 29 classes in Revision 7). A single chemical can fall into several hazard classes at once. Reference: 29 CFR 1910.1200(c) Regulation text (verbatim, 29 CFR 1910.1200(c)): Hazard class means the nature of the physical or health hazards, e.g., flammable solid, carcinogen, oral acute toxicity. ### Hazard Statement (H-code) URL: https://hazcomfast.com/glossary/hazard-statement A standardized phrase, with a fixed H-code, that describes the nature and degree of a chemical's hazard — for example H225, “Highly flammable liquid and vapor.” The wording is set by GHS and assigned to a specific hazard class and category, so the same hazard reads identically on every compliant label and SDS. Reference: 29 CFR 1910.1200(c) Regulation text (verbatim, 29 CFR 1910.1200(c)): Hazard statement means a statement assigned to a hazard class and category that describes the nature of the hazard(s) of a chemical, including, where appropriate, the degree of hazard. ### LC50 URL: https://hazcomfast.com/glossary/lc50 Lethal Concentration 50 — the concentration of a substance in air (or in water, for aquatic tests) that kills 50% of a test population over a set exposure time, typically a 4-hour inhalation exposure. It's the inhalation counterpart to the LD50 and is used to classify acute inhalation toxicity. A lower LC50 means a more toxic substance, because it takes less in the air to be lethal. Reference: 29 CFR 1910.1200 App A.1 (Acute Toxicity) Regulation text (summary, 29 CFR 1910.1200 App A.1.1): Acute toxicity refers to those adverse effects occurring following ... an inhalation exposure of 4 hours [used to classify inhalation hazards via the LC50]. ### LD50 URL: https://hazcomfast.com/glossary/ld50 Lethal Dose 50 — the single dose of a substance that kills 50% of a test population, expressed in milligrams of substance per kilogram of body weight (mg/kg). It's used to classify acute oral and dermal toxicity. A lower LD50 means a more toxic substance: it takes less to be lethal. Under HazCom, oral LD50 cut-offs define Categories 1 (≤ 5 mg/kg, most toxic) through 4 (≤ 2000 mg/kg). Reference: 29 CFR 1910.1200 App A.1 (Acute Toxicity) Regulation text (summary, 29 CFR 1910.1200 App A.1.1): Acute toxicity refers to those adverse effects occurring following oral or dermal administration of a single dose of a substance ... [classified via the LD50]. ### Mutagenicity URL: https://hazcomfast.com/glossary/mutagenicity A GHS health-hazard class (formally “germ cell mutagenicity”) for chemicals that can cause heritable genetic mutations — changes in the DNA of egg or sperm cells that can be passed to offspring. GHS sorts it into Category 1A (known), 1B (presumed), and Category 2 (suspected). Mutagens carry the health-hazard pictogram (GHS08). Reference: 29 CFR 1910.1200 App A.5 Regulation text (summary, 29 CFR 1910.1200 App A.5.1.1): Germ cell mutagenicity: This hazard class is primarily concerned with chemicals that may cause mutations in the germ cells of humans that can be transmitted to the progeny. ### Oxidizer URL: https://hazcomfast.com/glossary/oxidizer A chemical that can cause or intensify a fire — generally by yielding oxygen — even though it may not burn itself. GHS classifies oxidizing gases, liquids, and solids as separate hazard classes, all using the flame-over-circle pictogram (GHS03). Oxidizing gases are Category 1; oxidizing liquids and solids span Categories 1–3. Reference: 29 CFR 1910.1200 App B.13–B.14 Regulation text (verbatim, 29 CFR 1910.1200 App B.13.1): Oxidizing liquid means a liquid which, while in itself not necessarily combustible, may, generally by yielding oxygen, cause, or contribute to, the combustion of other material. ### Pictogram URL: https://hazcomfast.com/glossary/pictogram A GHS hazard symbol — a black image on a white background inside a red diamond-shaped frame — that conveys a chemical's hazard at a glance on labels and SDSs. The UN GHS system defines 9 pictograms (GHS01–GHS09), but OSHA's HazCom Standard requires only 8 on US workplace labels; GHS09 (Environment) is outside OSHA's jurisdiction and is voluntary. A red frame with no symbol inside is prohibited. Reference: 29 CFR 1910.1200 App C Regulation text (verbatim, 29 CFR 1910.1200(c)): Pictogram means a composition that may include a symbol plus other graphic elements, such as a border, background pattern, or color, that is intended to convey specific information about the hazards of a chemical. Eight pictograms are designated under this standard for application to a hazard category. ### Precautionary Statement (P-code) URL: https://hazcomfast.com/glossary/precautionary-statement A standardized phrase, with a fixed P-code, that tells the user what to do about a chemical's hazard — how to prevent harm, respond to an incident, store it, and dispose of it. The wording is fixed and must be reproduced in full: P210 is “Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.” — not a shortened paraphrase of it. GHS groups P-codes into five families (general, prevention, response, storage, disposal). Reference: 29 CFR 1910.1200(c) Regulation text (verbatim, 29 CFR 1910.1200(c)): Precautionary statement means a phrase that describes recommended measures that should be taken to minimize or prevent adverse effects resulting from exposure to a hazardous chemical, or improper storage or handling. ### Product Identifier URL: https://hazcomfast.com/glossary/product-identifier The name or number used to identify a hazardous chemical on its label and in its SDS — a chemical name, trade name, code, or CAS number. Under 29 CFR 1910.1200 it must be identical on the container label and in Section 1 of the SDS, so a worker can cross-reference the two and the chemical inventory. Reference: 29 CFR 1910.1200(c) Regulation text (verbatim, 29 CFR 1910.1200(c)): Product identifier means the name or number used for a hazardous chemical on a label or in the SDS. It provides a unique means by which the user can identify the chemical. The product identifier used shall permit cross-references to be made among the list of hazardous chemicals … the label and the SDS. ### Reproductive Toxicity URL: https://hazcomfast.com/glossary/reproductive-toxicity A GHS health-hazard class for chemicals that harm sexual function and fertility in adults, or the development of offspring. GHS uses Category 1A (known), 1B (presumed), and Category 2 (suspected), plus a separate category for effects on or via lactation. Reproductive toxicants (Cat 1–2) carry the health-hazard pictogram (GHS08). Reference: 29 CFR 1910.1200 App A.7 Regulation text (summary, 29 CFR 1910.1200 App A.7.1.1): Reproductive toxicity includes adverse effects on sexual function and fertility in adult males and females, as well as adverse effects on development of the offspring. ### Self-Classification URL: https://hazcomfast.com/glossary/self-classification The approach OSHA's HazCom standard takes to hazard classification: each chemical manufacturer or importer must evaluate the available scientific evidence and classify its own chemicals against the GHS criteria — rather than relying on a government-published list of classifications. Two companies must reach the same result for the same data, but each does its own classifying. Reference: 29 CFR 1910.1200(d) Regulation text (verbatim, 29 CFR 1910.1200(d)(1)): Chemical manufacturers and importers shall evaluate chemicals produced in their workplaces or imported by them to classify the chemicals in accordance with this section. ### Signal Word URL: https://hazcomfast.com/glossary/signal-word A single standardized word on a GHS label that signals the relative severity of a chemical's hazard. GHS uses only two — “Danger” for more severe hazards and “Warning” for less severe ones. Only one signal word appears on a label: “Danger” if any hazard class on the product warrants it. Reference: 29 CFR 1910.1200(c) Regulation text (verbatim, 29 CFR 1910.1200(c)): Signal word means a word used to indicate the relative level of severity of hazard and alert the reader to a potential hazard on the label. The signal words used in this section are “danger” and “warning.” “Danger” is used for the more severe hazards, while “warning” is used for the less severe. ### Skin Corrosion URL: https://hazcomfast.com/glossary/skin-corrosion A GHS health-hazard class for chemicals that cause irreversible damage to the skin — visible necrosis through the epidermis into the dermis — after up to 4 hours of contact. Corrosion is Category 1 (sub-divided 1A/1B/1C by how fast it acts); the milder, reversible effect is skin irritation (Category 2). Corrosives carry the corrosion pictogram (GHS05). Reference: 29 CFR 1910.1200 App A.2 Regulation text (summary, 29 CFR 1910.1200 App A.2.1): Skin corrosion is the production of irreversible damage to the skin; namely, visible necrosis through the epidermis and into the dermis, following the application of a test substance for up to 4 hours. ### Skin Sensitization URL: https://hazcomfast.com/glossary/skin-sensitization A GHS health-hazard class for chemicals that cause an allergic skin reaction (allergic contact dermatitis) after skin contact. The first exposure “induces” the allergy; later exposures “elicit” the reaction, so once a worker is sensitized even small amounts can trigger it. Skin sensitizers carry the exclamation-mark pictogram (GHS07). Reference: 29 CFR 1910.1200 App A.4 Regulation text (verbatim, 29 CFR 1910.1200 App A.4.1.1): Skin sensitization refers to an allergic response occurring after skin contact with a substance or mixture. ### STOT (Specific Target Organ Toxicity) URL: https://hazcomfast.com/glossary/stot A GHS health-hazard class for chemicals that cause specific, non-lethal damage to particular organs — separate from acute lethality. It splits into STOT — Single Exposure (STOT-SE, Categories 1, 2, 3) and STOT — Repeated Exposure (STOT-RE, Categories 1, 2). Most STOT hazards carry the health-hazard pictogram (GHS08). Reference: 29 CFR 1910.1200 App A.8–A.9 Regulation text (summary, 29 CFR 1910.1200 App A.8.1.1): This hazard class addresses specific target organ toxicity arising from a single exposure to a chemical. All significant health effects that can impair function, both reversible and irreversible, immediate and/or delayed are included. ### Supplemental Label Element URL: https://hazcomfast.com/glossary/supplemental-label-element Any non-standardized information a manufacturer adds to a GHS label beyond the six required elements — such as handling directions, fill dates, batch numbers, hazards not otherwise classified, or other regulatory notices (e.g., a California Prop 65 warning). It's allowed, but under OSHA's rules it must not contradict or cast doubt on the required GHS information. Reference: 29 CFR 1910.1200 App C.3 Regulation text (verbatim, 29 CFR 1910.1200 App C.3.1): To ensure that non-standardized information does not lead to unnecessarily wide variation or undermine the required information, supplementary information on the label is limited to when it provides further detail and does not contradict or cast doubt on the validity of the standardized hazard information. ### Safety Data Sheet (SDS) URL: https://hazcomfast.com/glossary/safety-data-sheet A standardized 16-section document the chemical manufacturer, importer, or distributor must provide for every hazardous chemical, detailing its hazards, safe handling, storage, exposure controls, first aid, and emergency information. Its content and order are set by 29 CFR 1910.1200(g) and Appendix D; it replaced the unstandardized MSDS under GHS alignment. Reference: 29 CFR 1910.1200(g) Regulation text (verbatim, 29 CFR 1910.1200(g)(2)): The chemical manufacturer or importer shall ensure that the safety data sheet is in English (although the employer may maintain copies in other languages as well), and includes at least the following section numbers and headings, and associated information under each heading, in the order listed (see appendix D to this section, for the specific content of each section of the safety data sheet): ### Readily Accessible URL: https://hazcomfast.com/glossary/readily-accessible The OSHA requirement that safety data sheets be readily accessible to employees during each work shift, in their work areas (29 CFR 1910.1200(g)(8); adopted for construction by 1926.59). “Readily accessible” means without barriers or unreasonable delay — electronic access is allowed, but only with reliable backup for power or system failures and no obstacle between the worker and the SDS. Reference: 29 CFR 1910.1200(g)(8) Regulation text (verbatim, 29 CFR 1910.1200(g)(8)): The employer shall maintain in the workplace copies of the required safety data sheets for each hazardous chemical, and shall ensure that they are readily accessible during each work shift to employees when they are in their work area(s). (Electronic access and other alternatives to maintaining paper copies of the safety data sheets are permitted as long as no barriers to immediate employee access in each workplace are created by such options.) ### Section 1: Identification URL: https://hazcomfast.com/glossary/sds-section-1 The first section of a Safety Data Sheet. It identifies the chemical and who's responsible for it: the product identifier (matching the label), recommended use and restrictions, the manufacturer/importer's name, address, and phone, and — critically — an emergency phone number. It's the section a responder reads first to confirm they have the right SDS. Reference: 29 CFR 1910.1200 App D Regulation text (verbatim, 29 CFR 1910.1200 App D, Table D.1 (Section 1, Identification)): (a) Product identifier used on the label; (b) Other means of identification; (c) Recommended use of the chemical and restrictions on use; (d) Name, U.S. address, and U.S. telephone number of the chemical manufacturer, importer, or other responsible party; (e) Emergency phone number. ### Section 2: Hazard Identification URL: https://hazcomfast.com/glossary/sds-section-2 The SDS section that states what's dangerous about the chemical: its GHS hazard classification (each hazard class and category), all the required label elements (pictograms, signal word, hazard statements, precautionary statements), and any hazards not otherwise classified (HNOC). It's the fastest read for “how could this hurt me?” Reference: 29 CFR 1910.1200 App D Regulation text (summary, 29 CFR 1910.1200 App D (Section 2)): Section 2, Hazard(s) identification: (a) classification of the chemical; (b) signal word, hazard statement(s), pictogram(s), and precautionary statement(s); (c) description of any hazards not otherwise classified; and, for a mixture, the percentage of ingredient(s) with unknown acute toxicity. ### Section 3: Composition / Information on Ingredients URL: https://hazcomfast.com/glossary/sds-section-3 The SDS section that discloses what the chemical is made of: the chemical name, common names/synonyms, CAS number, and concentration (or concentration range) of the substance or of each hazardous ingredient in a mixture. Any ingredient that contributes to a classified hazard must be listed, subject to limited trade-secret protection. Reference: 29 CFR 1910.1200 App D Regulation text (summary, 29 CFR 1910.1200 App D (Section 3)): Section 3, Composition/information on ingredients: chemical name; common name and synonyms; CAS number and other unique identifiers; and, for mixtures, the chemical name and concentration (exact percentage) or concentration ranges of all ingredients which are classified as health hazards and are present above their cut-off/concentration limits. ### Section 4: First-Aid Measures URL: https://hazcomfast.com/glossary/sds-section-4 The SDS section that tells you what to do if someone is exposed. It gives first-aid instructions broken out by route of exposure — inhalation, skin, eye, and ingestion — plus the most important symptoms (immediate and delayed) and any indication of the need for immediate medical attention or special treatment. It's the section to open in a medical emergency. Reference: 29 CFR 1910.1200 App D Regulation text (summary, 29 CFR 1910.1200 App D (Section 4)): Section 4, First-aid measures: description of necessary measures, subdivided according to the different routes of exposure (inhalation, skin and eye contact, and ingestion); most important symptoms/effects, acute and delayed; and indication of immediate medical attention and special treatment needed, if necessary. ### Section 5: Fire-Fighting Measures URL: https://hazcomfast.com/glossary/sds-section-5 The SDS section written for anyone fighting a fire involving the chemical. It lists suitable and unsuitable extinguishing media, the specific hazards the chemical creates in a fire (toxic combustion products, explosion risk, reactivity), and the special protective equipment and precautions firefighters need. It's a key reference for the fire department's pre-planning. Reference: 29 CFR 1910.1200 App D Regulation text (summary, 29 CFR 1910.1200 App D (Section 5)): Section 5, Fire-fighting measures: suitable (and unsuitable) extinguishing media; specific hazards arising from the chemical (e.g., nature of any hazardous combustion products); and special protective equipment and precautions for fire-fighters. ### Section 6: Accidental Release Measures URL: https://hazcomfast.com/glossary/sds-section-6 The SDS section that tells you how to handle a spill or leak. It covers personal precautions, protective equipment, and emergency procedures (protecting people first), environmental precautions (keeping it out of drains and waterways), and the methods and materials for containment and cleanup. It's the spill-response playbook for the chemical. Reference: 29 CFR 1910.1200 App D Regulation text (summary, 29 CFR 1910.1200 App D (Section 6)): Section 6, Accidental release measures: personal precautions, protective equipment, and emergency procedures; environmental precautions; and methods and materials for containment and cleaning up. ### Section 7: Handling & Storage URL: https://hazcomfast.com/glossary/sds-section-7 The SDS section on how to work with and store the chemical safely day to day. It covers precautions for safe handling (hygiene practices, avoiding ignition sources or incompatible conditions) and conditions for safe storage — temperature, ventilation, container type, and, importantly, which materials it must be kept away from (incompatibilities). Reference: 29 CFR 1910.1200 App D Regulation text (summary, 29 CFR 1910.1200 App D (Section 7)): Section 7, Handling and storage: precautions for safe handling; and conditions for safe storage, including any incompatibilities. ### Section 8: Exposure Controls / Personal Protection URL: https://hazcomfast.com/glossary/sds-section-8 The SDS section that tells you how to keep exposure safe. It lists the applicable occupational exposure limits (OSHA PELs, ACGIH TLVs, and any manufacturer-recommended limits), the appropriate engineering controls (like ventilation), and the individual protection measures — the specific PPE (gloves, eye/face, respirator) for handling the chemical. It's the section a safety pro uses to build a control plan. Reference: 29 CFR 1910.1200 App D Regulation text (summary, 29 CFR 1910.1200 App D (Section 8)): Section 8, Exposure controls/personal protection: OSHA permissible exposure limits (PELs), ACGIH threshold limit values (TLVs), and any other exposure limit used or recommended … appropriate engineering controls; and individual protection measures, such as personal protective equipment. ### Section 9: Physical & Chemical Properties URL: https://hazcomfast.com/glossary/sds-section-9 The SDS section that lists the chemical's measurable physical and chemical properties — appearance, odor, pH, melting/boiling point, flash point, flammable (explosive) limits, vapor pressure and density, relative density, solubility, auto-ignition and decomposition temperatures, and viscosity. These numbers underpin the hazard classification and tell you how the chemical will behave. Reference: 29 CFR 1910.1200 App D Regulation text (summary, 29 CFR 1910.1200 App D (Section 9)): Section 9, Physical and chemical properties: appearance; odor; odor threshold; pH; melting/freezing point; initial boiling point; flash point; evaporation rate; flammability; upper/lower flammability or explosive limits; vapor pressure; vapor density; relative density; solubility; partition coefficient; auto-ignition temperature; decomposition temperature; and viscosity. ### Section 10: Stability & Reactivity URL: https://hazcomfast.com/glossary/sds-section-10 The SDS section on the chemistry of danger: whether the chemical is stable, what could make it react hazardously, the conditions to avoid (heat, shock, static, moisture), the materials it's incompatible with, and the hazardous products it can decompose into. It's the technical basis for safe storage and handling decisions. Reference: 29 CFR 1910.1200 App D Regulation text (summary, 29 CFR 1910.1200 App D (Section 10)): Section 10, Stability and reactivity: reactivity; chemical stability; possibility of hazardous reactions; conditions to avoid (e.g., static discharge, shock, or vibration); incompatible materials; and hazardous decomposition products. ### Section 11: Toxicological Information URL: https://hazcomfast.com/glossary/sds-section-11 The SDS section with the detailed health-effects data behind the hazards: the likely routes of exposure, the symptoms and immediate/delayed/chronic effects, numerical toxicity measures (LD50/LC50 or acute toxicity estimates), and whether the chemical is listed as a carcinogen by NTP, IARC, or OSHA. It's the reference physicians and hygienists rely on. Reference: 29 CFR 1910.1200 App D Regulation text (summary, 29 CFR 1910.1200 App D (Section 11)): Section 11, Toxicological information: likely routes of exposure; symptoms related to physical, chemical, and toxicological characteristics; delayed, immediate, and chronic effects from short- and long-term exposure; numerical measures of toxicity (such as acute toxicity estimates); and whether the chemical is listed as a carcinogen (by NTP, IARC, or OSHA). ### Section 12: Ecological Information URL: https://hazcomfast.com/glossary/sds-section-12 The SDS section on the chemical's effect on the environment: its ecotoxicity (harm to aquatic and other organisms), how persistent and degradable it is, its potential to bioaccumulate, its mobility in soil, and other adverse effects. It is one of the four sections (12–15) that OSHA does not enforce, because environmental protection is outside OSHA's jurisdiction, and Appendix D makes it optional rather than mandatory — but nearly every SDS includes it. Reference: 29 CFR 1910.1200 App D (non-mandatory) Regulation text (summary, 29 CFR 1910.1200 App D (Section 12, non-mandatory)): Section 12, Ecological information (non-mandatory): ecotoxicity (aquatic and terrestrial, where available); persistence and degradability; bioaccumulative potential; mobility in soil; and other adverse effects. ### Section 13: Disposal Considerations URL: https://hazcomfast.com/glossary/sds-section-13 The SDS section on getting rid of the chemical safely: recommended waste-treatment and disposal methods for the product and its contaminated packaging, and any special precautions. It's one of sections 12–15 that OSHA does not enforce (disposal is the EPA's jurisdiction) and that Appendix D makes optional rather than mandatory — though nearly every SDS carries it. Reference: 29 CFR 1910.1200 App D (non-mandatory) Regulation text (summary, 29 CFR 1910.1200 App D (Section 13, non-mandatory)): Section 13, Disposal considerations: description of waste residues and information on their safe handling and methods of disposal, including the disposal of any contaminated packaging. ### Section 14: Transport Information URL: https://hazcomfast.com/glossary/sds-section-14 The SDS section for shipping the chemical: its classification for transport under DOT, IATA (air), and IMDG (sea) — the UN number, proper shipping name, transport hazard class, packing group, and any environmental hazards (e.g., marine pollutant) or special precautions. Like sections 12–15, OSHA does not enforce its content. Reference: 29 CFR 1910.1200 App D (non-mandatory) Regulation text (summary, 29 CFR 1910.1200 App D (Section 14, non-mandatory)): Section 14, Transport information: UN number; UN proper shipping name; transport hazard class(es); packing group, if applicable; environmental hazards; transport in bulk; and special precautions. ### Section 15: Regulatory Information URL: https://hazcomfast.com/glossary/sds-section-15 The SDS section listing the safety, health, and environmental regulations specific to the chemical that aren't covered elsewhere on the sheet — for example SARA Title III (302/311/312/313), CERCLA reportable quantities, TSCA inventory status, and state right-to-know or California Prop 65 listings. It's one of sections 12–15 OSHA doesn't enforce. Reference: 29 CFR 1910.1200 App D (non-mandatory) Regulation text (summary, 29 CFR 1910.1200 App D (Section 15, non-mandatory)): Section 15, Regulatory information: safety, health, and environmental regulations specific to the product in question that are not indicated anywhere else on the safety data sheet. ### Section 16: Other Information URL: https://hazcomfast.com/glossary/sds-section-16 The final SDS section. It holds the housekeeping and traceability information: the date the SDS was prepared or last revised, an indication of what changed from the previous version, a key to any abbreviations and acronyms used, and the references or data sources. Unlike sections 12–15, Section 16 is OSHA-enforced. Reference: 29 CFR 1910.1200 App D Regulation text (summary, 29 CFR 1910.1200 App D (Section 16)): Section 16, Other information, including date of preparation or last revision. ### Action Level URL: https://hazcomfast.com/glossary/action-level An airborne concentration of a substance — typically half the PEL — at which certain provisions of an OSHA standard kick in (such as exposure monitoring, training, and medical surveillance), even though it is below the legal exposure limit. For respirable crystalline silica the action level is 25 µg/m³ as an 8-hour TWA, half the 50 µg/m³ PEL. Regulation text (verbatim, 29 CFR 1926.1153(b)): Action level means a concentration of airborne respirable crystalline silica of 25 µg/m³, calculated as an 8-hour TWA. ### Administrative Controls URL: https://hazcomfast.com/glossary/administrative-controls Changes to how and when work is done — job rotation, scheduling, safe work practices, housekeeping, training, and signage — that reduce a worker's exposure without altering the hazard itself. They are the fourth tier of the hierarchy of controls, below engineering controls and above PPE. Reference: 29 CFR 1910.95(b)(1) Regulation text (verbatim, 29 CFR 1910.95(b)(1)): When employees are subjected to sound exceeding those listed in Table G-16, feasible administrative or engineering controls shall be utilized. If such controls fail to reduce sound levels within the levels of Table G-16, personal protective equipment shall be provided and used. ### Biological Exposure Index (BEI) URL: https://hazcomfast.com/glossary/bei An ACGIH guidance value for interpreting biological monitoring results — the concentration of a chemical (or its metabolite) measured in a worker's blood, urine, or exhaled breath. A BEI represents the level most likely found in a healthy worker whose inhalation exposure was at the TLV, so it measures the dose the body actually absorbed, not just what's in the air. Reference: ACGIH — BEI (advisory) Regulation text (summary, ACGIH — Biological Exposure Indices): Biological Exposure Indices (BEIs) are guidance values for assessing biological monitoring results. A BEI represents the level of a determinant most likely to be observed in specimens collected from a healthy worker who has been exposed by inhalation at the TLV. ### California Proposition 65 URL: https://hazcomfast.com/glossary/prop-65 California's Safe Drinking Water and Toxic Enforcement Act of 1986. It requires businesses to warn Californians before exposing them to any of the ~900+ listed chemicals known to the state to cause cancer, birth defects, or other reproductive harm, and prohibits discharging those chemicals into drinking-water sources. It's a California law, but it reaches nearly any product sold there. Reference: California Health & Safety Code §25249.5 et seq. Regulation text (summary, OEHHA — Proposition 65): Proposition 65 requires businesses to provide warnings to Californians about significant exposures to chemicals that cause cancer, birth defects or other reproductive harm. ### CAS Number URL: https://hazcomfast.com/glossary/cas-number A unique numerical identifier assigned by the Chemical Abstracts Service (a division of the American Chemical Society) to every distinct chemical substance. It has the format of up to seven digits, a dash, two digits, a dash, and a final check digit (e.g., 67-64-1 for acetone). Because chemical names vary, the CAS number is the unambiguous global key used on SDSs, inventories, and regulations. Reference: CAS Registry (ACS) / SDS Section 3 Regulation text (summary, CAS Registry (American Chemical Society)): A CAS Registry Number is a unique numerical identifier assigned by the Chemical Abstracts Service to every chemical substance described in the open scientific literature; it identifies a specific substance regardless of its many possible names. ### Ceiling Limit URL: https://hazcomfast.com/glossary/ceiling-limit An exposure limit that must not be exceeded at any instant during the workday — the strictest type of OSHA exposure limit. In OSHA's Z-tables it is marked with a “C” before the value. Unlike an 8-hour TWA (an average) or a 15-minute STEL, a ceiling applies to a single moment. Reference: 29 CFR 1910.1000(a)(1) Regulation text (verbatim, 29 CFR 1910.1000(a)(1)): An employee’s exposure to any substance in Table Z-1, the exposure limit of which is preceded by a “C”, shall at no time exceed the exposure limit given for that substance. ### Chemical Compatibility URL: https://hazcomfast.com/glossary/chemical-compatibility Whether two or more chemicals can be safely stored or used near each other without reacting dangerously — releasing heat, toxic gas, or fire. Incompatible chemicals must be physically separated (segregated) in storage. Each chemical's incompatibilities are listed in Section 10 of its SDS, and compatibility drives storage layout and spill response. Reference: 29 CFR 1910.1200 App D (SDS Section 10) Regulation text (verbatim, 29 CFR 1910.1200 App D, Table D.1 (Section 10, Stability and reactivity)): (a) Reactivity; (b) Chemical stability; (c) Possibility of hazardous reactions, including those associated with foreseeable emergencies; (d) Conditions to avoid (e.g., static discharge, shock, or vibration); (e) Incompatible materials; (f) Hazardous decomposition products. ### Chemical Inventory URL: https://hazcomfast.com/glossary/chemical-inventory A list of the hazardous chemicals known to be present in a workplace, identified in a way that cross-references each chemical's safety data sheet. It's a required part of OSHA's written HazCom program (29 CFR 1910.1200(e)(1)(i)) and the foundation for SDS management, EPCRA Tier II reporting, and emergency planning. Reference: 29 CFR 1910.1200(e)(1)(i) Regulation text (verbatim, 29 CFR 1910.1200(e)(1)(i)): Employers shall develop, implement, and maintain at each workplace, a written hazard communication program which … includes the following: … A list of the hazardous chemicals known to be present using a product identifier that is referenced on the appropriate safety data sheet (the list may be compiled for the workplace as a whole or for individual work areas). ### Combustible Liquid URL: https://hazcomfast.com/glossary/combustible-liquid A liquid that burns, but needs warming first — and a term OSHA no longer defines. The definition lived at 29 CFR 1910.106(a)(18) until the 2012 GHS alignment struck it; that paragraph now reads only “[Reserved]”. What 1910.106(a)(19) defines today is a flammable liquid — “any liquid having a flashpoint at or below 199.4 °F (93 °C)” — divided into four categories, the same four that 1910.1200 Appendix B.6 uses for classification and labels. The familiar 100 °F line and the Class II / IIIA / IIIB scheme come from NFPA 30, not from the current 29 CFR, and they remain in force through fire codes, insurers, and the consensus standards OSHA still incorporates by reference — whose titles still say “Flammable and Combustible Liquids”. So the word is alive on a jobsite; it just no longer points at a federal definition. Reference: 29 CFR 1910.106(a)(19) Regulation text (verbatim, 29 CFR 1910.106(a)(19)): Flammable liquid means any liquid having a flashpoint at or below 199.4 °F (93 °C). Flammable liquids are divided into four categories as follows: ... (iii) Category 3 shall include liquids having flashpoints at or above 73.4 °F (23 °C) and at or below 140 °F (60 °C). ... (iv) Category 4 shall include liquids having flashpoints above 140 °F (60 °C) and at or below 199.4 °F (93 °C). ### Decontamination URL: https://hazcomfast.com/glossary/decontamination The process of removing or neutralizing hazardous substances from workers, their PPE, tools, and surfaces so contamination isn't spread or carried home. Under OSHA's HAZWOPER standard (1910.120), decon procedures must be planned and carried out in a dedicated contamination-reduction zone before anyone leaves a contaminated area — critical for spill response, asbestos/lead work, and confined-space entry. Reference: 29 CFR 1910.120(k) Regulation text (verbatim, 29 CFR 1910.120(k)(2)(i)): A decontamination procedure shall be developed, communicated to employees and implemented before any employees or equipment may enter areas on site where potential for exposure to hazardous substances exists. ### Dose-Response Relationship URL: https://hazcomfast.com/glossary/dose-response The core principle of toxicology that the effect of a substance depends on the dose — the amount and duration of exposure. As dose rises, the severity or likelihood of the health effect changes in a predictable way. This relationship is the scientific basis for setting occupational exposure limits like PELs and TLVs. Reference: Toxicology principle (basis for OELs) Regulation text (summary, Toxicology — dose-response): The dose-response relationship describes the change in effect on an organism caused by differing levels of exposure (dose) to a substance over a given time. It is a fundamental principle of toxicology and the basis for occupational exposure limits. ### Engineering Controls URL: https://hazcomfast.com/glossary/engineering-controls Physical changes to the workplace, process, or equipment that reduce or remove a hazard at its source — ventilation, enclosure, wet methods, machine guarding — without relying on the worker to do anything. They sit in the third tier of the hierarchy of controls, above administrative controls and PPE, and OSHA requires them before PPE whenever feasible. Reference: 29 CFR 1910.1000(e) Regulation text (verbatim, 29 CFR 1910.1000(e)): To achieve compliance with paragraphs (a) through (d) of this section, administrative or engineering controls must first be determined and implemented whenever feasible. When such controls are not feasible to achieve full compliance, protective equipment or any other protective measures shall be used to keep the exposure of employees to air contaminants within the limits prescribed in this section. ### EPCRA URL: https://hazcomfast.com/glossary/epcra The Emergency Planning and Community Right-to-Know Act — the 1986 federal law (Title III of SARA) administered by the EPA that gives communities the right to know what hazardous chemicals are near them. It sets four reporting duties: emergency planning (§302), release notification (§304), hazardous-chemical inventory reporting (§§311–312, including Tier II), and toxic release reporting (§313, the TRI). Reference: EPCRA / 40 CFR Parts 355, 370, 372 Regulation text (summary, EPCRA (Title III of SARA, 1986)): EPCRA establishes requirements for federal, state, and local governments, tribes, and industry regarding emergency planning and community right-to-know reporting on hazardous and toxic chemicals. ### Exposure Assessment URL: https://hazcomfast.com/glossary/exposure-assessment The industrial-hygiene process of measuring or estimating how much of a hazard a worker is exposed to — its intensity (concentration), frequency, duration, and route — to decide whether it exceeds a limit and what controls are needed. It's the “Evaluate” step of industrial hygiene, and OSHA's health standards (like silica) require employers to perform it. Reference: 29 CFR 1926.1153(d) (example) Regulation text (verbatim, 29 CFR 1926.1153(d)(2)(i)): The employer shall assess the exposure of each employee who is or may reasonably be expected to be exposed to respirable crystalline silica at or above the action level in accordance with either the performance option in paragraph (d)(2)(ii) or the scheduled monitoring option in paragraph (d)(2)(iii) of this section. ### First Aid URL: https://hazcomfast.com/glossary/first-aid For OSHA recordkeeping, “first aid” is a specific closed list of minor treatments in 29 CFR 1904.7(b)(5)(ii) — bandages, non-prescription medications at OTC strength, tetanus shots, wound cleaning, hot/cold therapy, and similar. Any treatment not on that list is “medical treatment beyond first aid,” which makes a work-related case recordable. The list is exhaustive: nothing else counts as first aid. Reference: 29 CFR 1904.7(b)(5)(ii) Regulation text (verbatim, 29 CFR 1904.7(b)(5)(ii)): For the purposes of part 1904, “first aid” means the following: (A) Using a non-prescription medication at nonprescription strength (for medications available in both prescription and non-prescription form, a recommendation by a physician or other licensed health care professional to use a non-prescription medication at prescription strength is considered medical treatment for recordkeeping purposes); (B) Administering tetanus immunizations (other immunizations, such as Hepatitis B vaccine or rabies vaccine, are considered medical treatment); (C) Cleaning, flushing or soaking wounds on the surface of the skin; (D) Using wound coverings such as bandages, Band-Aids™, gauze pads, etc.; or using butterfly bandages or Steri-Strips™ (other wound closing devices such as sutures, staples, etc., are considered medical treatment); … ### Flash Point URL: https://hazcomfast.com/glossary/flash-point The lowest temperature at which a liquid gives off enough vapor to form an ignitable mixture with air near its surface. It is the key property GHS uses to sort flammable liquids into categories — the lower the flash point, the more easily the liquid ignites. Reference: 29 CFR 1910.1200 App B.6 Regulation text (verbatim, 29 CFR 1910.1200 App B.6.1): Flammable liquid means a liquid having a flash point of not more than 93 °C (199.4 °F). ### Flammable Liquid URL: https://hazcomfast.com/glossary/flammable-liquid Under OSHA's HazCom standard, a liquid with a flash point at or below 93°C (199.4°F). GHS/HCS sorts flammable liquids into four categories by flash point (FP) and initial boiling point (BP): Category 1 is the most dangerous (very low flash point and boiling point, e.g. gasoline), Category 4 the least. The lower the flash point, the more readily the liquid gives off ignitable vapor at ordinary temperatures. Reference: 29 CFR 1910.1200 App B.6 / 1910.106 Regulation text (verbatim, 29 CFR 1910.1200 App B.6.1): Flammable liquid means a liquid having a flash point of not more than 93 °C (199.4 °F). ### Hierarchy of Controls URL: https://hazcomfast.com/glossary/hierarchy-of-controls NIOSH's framework for choosing hazard controls, ranked from most to least effective: Elimination, Substitution, Engineering controls, Administrative controls, and Personal Protective Equipment (PPE). The top levels are more effective because they reduce the hazard itself without relying on worker behavior; PPE is the last resort, not the first. Regulation text (summary, NIOSH — Hierarchy of Controls): The idea behind this hierarchy is that the control methods at the top of the list are potentially more effective and protective than those at the bottom. Following this hierarchy normally leads to the implementation of inherently safer systems, where the risk of illness or injury has been substantially reduced. ### IDLH URL: https://hazcomfast.com/glossary/idlh Immediately Dangerous to Life or Health — an airborne exposure level that poses an immediate threat to life, would cause irreversible or delayed permanent health effects, or would impair a worker's ability to escape. IDLH values are set by NIOSH using a 30-minute maximum escape time as a safety margin, and they decide where only the most protective respirators may be used. Reference: 29 CFR 1910.134(b) Regulation text (verbatim, 29 CFR 1910.134(b)): Immediately dangerous to life or health (IDLH) means an atmosphere that poses an immediate threat to life, would cause irreversible adverse health effects, or would impair an individual's ability to escape from a dangerous atmosphere. ### Industrial Hygiene URL: https://hazcomfast.com/glossary/industrial-hygiene The science and practice of protecting worker health by anticipating, recognizing, evaluating, controlling, and confirming protection from workplace hazards (the ARECC framework). Industrial hygienists (IHs/CIHs) assess exposures to chemical, physical, biological, and ergonomic stressors — running air sampling, comparing results to limits like PELs and TLVs, and recommending controls. Reference: OSHA / AIHA — industrial hygiene Regulation text (summary, AIHA — definition of industrial hygiene): Industrial hygiene is the art and science dedicated to the anticipation, recognition, evaluation, control, and confirmation of protection from those environmental stressors in, or arising from, the workplace that may result in injury, illness, impairment, or affect the well-being of workers. ### LEL / LFL URL: https://hazcomfast.com/glossary/lel-lfl Lower Explosive Limit (LEL), also called Lower Flammable Limit (LFL): the minimum concentration of a gas or vapor in air — by volume — that can ignite. Below the LEL the mixture is too lean to burn; between the LEL and the UEL it is flammable. Gas meters read in “% LEL,” and OSHA's confined-space rule treats 10% of the LEL as a hazardous atmosphere. Reference: 29 CFR 1926.1202 Regulation text (verbatim, 29 CFR 1926.1202 (hazardous atmosphere)): Hazardous atmosphere means an atmosphere that may expose employees to the risk of death, incapacitation, impairment of ability to self-rescue (that is, escape unaided from a permit space), injury, or acute illness from one or more of the following causes: (1) Flammable gas, vapor, or mist in excess of 10 percent of its lower flammable limit (LFL); … ### NFPA 704 Diamond URL: https://hazcomfast.com/glossary/nfpa-704 The NFPA “fire diamond” — a four-quadrant placard that gives emergency responders an at-a-glance sense of a material's hazards: blue (health), red (flammability), and yellow (instability/reactivity) each rated 0 (minimal) to 4 (severe), plus a white quadrant for special hazards (like OX for oxidizer or W̶ for water-reactive). It's for responders at fixed installations — a different system from GHS labels. Reference: NFPA 704 (standard) Regulation text (summary, NFPA 704): NFPA 704 provides a readily recognized, easily understood system of markings that gives emergency responders a general sense of the health, flammability, and instability hazards of a material, rated on a scale of 0 (minimal hazard) to 4 (severe hazard). ### NIOSH URL: https://hazcomfast.com/glossary/niosh The National Institute for Occupational Safety and Health — the federal research agency, part of the CDC, created by the same 1970 OSH Act that created OSHA. NIOSH conducts research and makes recommendations to prevent work-related injury and illness; it publishes Recommended Exposure Limits (RELs), IDLH values, the Pocket Guide to Chemical Hazards, and approves respirators. It does not write or enforce standards — that is OSHA's role. Reference: OSH Act of 1970, §22 Regulation text (summary, OSH Act of 1970, §22): The National Institute for Occupational Safety and Health was established by the Occupational Safety and Health Act of 1970 to conduct research and develop recommendations for the prevention of work-related injury and illness. ### Occupational Illness URL: https://hazcomfast.com/glossary/occupational-illness Any abnormal condition or disorder — other than one caused by a physical injury — that results from exposure to factors associated with employment, whether by inhalation, absorption, ingestion, or direct contact. On the OSHA 300 Log, recordable illnesses are grouped into categories such as skin disorders, respiratory conditions, poisoning, hearing loss, and all other illnesses. Reference: 29 CFR 1904 Regulation text (summary, 29 CFR 1904 (recordkeeping)): An occupational illness is any abnormal condition or disorder, other than one resulting from an occupational injury, caused by exposure to environmental factors associated with employment. ### pH URL: https://hazcomfast.com/glossary/ph A measure of how acidic or alkaline (basic) a water-based solution is, on a scale from 0 to 14. A pH of 7 is neutral, below 7 is acidic, and above 7 is basic. The scale is logarithmic — each whole number is a tenfold change in acidity. In chemical safety, extreme pH matters: GHS treats a pH of 2 or lower, or 11.5 or higher, as a signal that a substance may be corrosive to skin. It's reported in Section 9 of a Safety Data Sheet. Reference: 29 CFR 1910.1200 (SDS Section 9) Regulation text (summary, GHS / 29 CFR 1910.1200 App A.2 (skin corrosion)): A substance with a pH of 2 or less, or a pH of 11.5 or greater, may be presumed to be corrosive to skin (extreme pH being one indicator considered in classification). ### PPE (Personal Protective Equipment) URL: https://hazcomfast.com/glossary/ppe Equipment worn to protect a worker from injury or illness when a hazard can't be fully eliminated — gloves, safety glasses and face shields, respirators, hearing protection, hard hats, and protective footwear. In the hierarchy of controls, PPE is the last line of defense: it doesn't remove the hazard, it only reduces the wearer's exposure. OSHA (1910.132) requires employers to assess hazards, select appropriate PPE, and generally provide it at no cost to employees. Reference: 29 CFR 1910.132 (Subpart I) Regulation text (verbatim, 29 CFR 1910.132(h)(1)): Except as provided by paragraphs (h)(2) through (h)(6) of this section, the protective equipment, including personal protective equipment (PPE), used to comply with this part, shall be provided by the employer at no cost to employees. ### Respiratory Sensitization URL: https://hazcomfast.com/glossary/respiratory-sensitization A GHS health-hazard class for chemicals that cause hypersensitivity of the airways after inhalation — that is, occupational asthma. Like skin sensitization it has an induction phase, then once a worker is sensitized even very low concentrations can trigger a severe asthmatic reaction. Respiratory sensitizers carry the health-hazard pictogram (GHS08) and the signal word “Danger.” Reference: 29 CFR 1910.1200 App A.4 Regulation text (verbatim, 29 CFR 1910.1200 App A.4.1.1): Respiratory sensitization refers to hypersensitivity of the airways occurring after inhalation of a substance or mixture. ### Right to Know URL: https://hazcomfast.com/glossary/right-to-know The foundational principle that workers have a right to know about the hazardous chemicals they may be exposed to on the job — their identities, hazards, and protective measures. In the U.S. workplace, that right is codified in OSHA's Hazard Communication Standard (1910.1200), which requires labels, safety data sheets, and training. A parallel “community right-to-know” (under EPA's EPCRA) extends similar information to the public and emergency responders. Reference: 29 CFR 1910.1200 (Hazard Communication Standard) Regulation text (summary, 29 CFR 1910.1200(a)(1)): The purpose of this section is to ensure that the hazards of all chemicals produced or imported are classified, and that information concerning the classified hazards is transmitted to employers and employees. ### SARA (Superfund Amendments and Reauthorization Act) URL: https://hazcomfast.com/glossary/sara The 1986 federal law that amended and expanded CERCLA (Superfund). Its most important piece for chemical safety is Title III — the Emergency Planning and Community Right-to-Know Act (EPCRA) — which created the emergency planning, hazardous-chemical inventory, and Toxic Release Inventory reporting programs. When people say “SARA Title III,” they mean EPCRA. Reference: SARA (Pub. L. 99-499, 1986) Regulation text (summary, SARA of 1986 (Pub. L. 99-499)): The Superfund Amendments and Reauthorization Act of 1986 amended the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA); its Title III is the Emergency Planning and Community Right-to-Know Act (EPCRA). ### STEL (Short-Term Exposure Limit) URL: https://hazcomfast.com/glossary/stel A 15-minute time-weighted average exposure that should not be exceeded at any time during a workday, even when the 8-hour TWA stays within the PEL. The STEL guards against acute effects (irritation, narcosis, tissue damage) from short, intense exposures that an 8-hour average would mask. Regulation text (summary, OSHA Technical Manual — STEL): A short-term exposure limit (STEL) is the concentration to which workers can be exposed continuously for a short period of time (15 minutes) without suffering irritation, chronic or irreversible tissue damage, or narcosis — provided the daily TWA is not exceeded. ### Threshold Limit Value (TLV) URL: https://hazcomfast.com/glossary/tlv An occupational exposure guideline published by the ACGIH (American Conference of Governmental Industrial Hygienists) — the airborne concentration of a substance to which nearly all workers may be repeatedly exposed without adverse effect. TLVs are advisory, not law, and are reviewed yearly, so they are often more current and more protective than OSHA's enforceable PELs. Regulation text (summary, ACGIH — definition of a TLV): Threshold limit values refer to airborne concentrations of chemical substances and represent conditions under which it is believed that nearly all workers may be repeatedly exposed, day after day, over a working lifetime, without adverse health effects. ### Tier II Report URL: https://hazcomfast.com/glossary/tier-ii-report The annual hazardous-chemical inventory report required under EPCRA §312 (SARA Title III) for facilities that store hazardous chemicals at or above the reporting thresholds. It lists the chemicals, quantities, and storage locations, and is due by March 1 each year to the State Emergency Response Commission (SERC), the Local Emergency Planning Committee (LEPC), and the local fire department. Reference: EPCRA §312 / 40 CFR Part 370 Regulation text (summary, EPCRA §312 / 40 CFR 370.40): The owner or operator of a facility … shall prepare and submit an emergency and hazardous chemical inventory form (Tier II) to the [SERC], the [LEPC], and the fire department with jurisdiction over the facility … by March 1. ### Time-Weighted Average (TWA) URL: https://hazcomfast.com/glossary/twa The average airborne concentration of a substance a worker is exposed to, weighted over a set time — almost always an 8-hour workday. It is how OSHA expresses most PELs (and ACGIH TLVs): brief high exposures and quiet periods are averaged into a single number that is compared to the limit. Regulation text (summary, 29 CFR 1910.1000(d)(1)): E = (Ca·Ta + Cb·Tb + ... + Cn·Tn) ÷ 8 — where E is the equivalent 8-hour exposure, C is the concentration during a period, and T is the duration in hours of that period. ### UEL / UFL URL: https://hazcomfast.com/glossary/uel-ufl Upper Explosive Limit (UEL), also called Upper Flammable Limit (UFL): the maximum concentration of a gas or vapor in air that will still ignite. Above the UEL, the mixture is too “rich” — too much fuel and not enough oxygen — to burn. Together with the LEL, it defines the flammable range: a mixture only ignites when it falls between the two. Reference: 29 CFR 1910.1200 App D (SDS Section 9) Regulation text (summary, NIOSH / NFPA — upper flammable limit): The upper flammable (explosive) limit is the highest concentration of a gas or vapor in air that will propagate a flame; above this concentration the mixture is too rich to burn. ### UN Number URL: https://hazcomfast.com/glossary/un-number A four-digit identification number assigned by the United Nations to hazardous substances and articles for transport (for example, UN1203 for gasoline). It's used worldwide on shipping papers, placards, and packaging to identify what's being transported, and it appears in Section 14 of the SDS alongside the proper shipping name and hazard class. Reference: UN model regulations / SDS Section 14 Regulation text (summary, UN Recommendations on the Transport of Dangerous Goods): The UN number is a four-digit number assigned by the United Nations Committee of Experts to identify a substance or article of dangerous goods for the purpose of transport; it appears on shipping documents, packaging, and placards. ### Vapor Pressure URL: https://hazcomfast.com/glossary/vapor-pressure The pressure a substance's vapor exerts when it's in equilibrium with its own liquid (or solid) at a given temperature — a measure of how readily it evaporates. The higher the vapor pressure, the more volatile the chemical, and the more vapor it puts into the air, raising the potential for inhalation exposure and flammable-atmosphere buildup. It's listed in Section 9 of every SDS. Reference: 29 CFR 1910.1200 App D (SDS Section 9) Regulation text (summary, OSHA — physical properties (SDS Section 9)): Vapor pressure is the pressure exerted by a vapor in equilibrium with its liquid at a given temperature; the higher the vapor pressure, the more volatile the substance and the greater its potential to produce airborne exposure. ### CERCLA URL: https://hazcomfast.com/glossary/cercla The Comprehensive Environmental Response, Compensation, and Liability Act of 1980 — better known as Superfund. It gives the EPA authority and a fund to clean up hazardous-waste sites and emergency releases, holds responsible parties liable for the cleanup, and sets Reportable Quantities (RQs) — the release amounts that must be reported to the federal government. Reference: CERCLA / 40 CFR Part 302 Regulation text (summary, CERCLA of 1980 (Superfund)): CERCLA provides a federal “Superfund” to clean up uncontrolled or abandoned hazardous-waste sites as well as accidents, spills, and other emergency releases of pollutants and contaminants into the environment, and gives the EPA authority to seek out the parties responsible for a release. ### 29 CFR 1910 URL: https://hazcomfast.com/glossary/29-cfr-1910 The part of Title 29 of the Code of Federal Regulations that contains OSHA's General Industry standards — the default rulebook for most American workplaces (manufacturing, warehousing, healthcare, etc.) that aren't covered by the construction, maritime, or agriculture standards. It includes core rules like Hazard Communication (1910.1200) and the permissible exposure limits (1910.1000). Several 1910 standards are cross-referenced into construction via Part 1926. Reference: 29 CFR Part 1910 Regulation text (verbatim, 29 CFR 1910.5(c)(1)): If a particular standard is specifically applicable to a condition, practice, means, method, operation, or process, it shall prevail over any different general standard which might otherwise be applicable. ### 29 CFR 1926 URL: https://hazcomfast.com/glossary/29-cfr-1926 The part of Title 29 of the Code of Federal Regulations that contains OSHA's Construction standards — the “Safety and Health Regulations for Construction.” It governs construction, alteration, and repair work, with construction-specific rules for fall protection (Subpart M), scaffolds (Subpart L), excavations (Subpart P), electrical (Subpart K), and more. Where a task isn't addressed in 1926, some general-industry (1910) standards apply by reference. Reference: 29 CFR Part 1926 Regulation text (verbatim, 29 CFR 1910.12(b)): For purposes of this section, Construction work means work for construction, alteration, and/or repair, including painting and decorating. ### Anchor Point URL: https://hazcomfast.com/glossary/anchor-point The secure attachment point a personal fall arrest system (PFAS) ties off to — the “A” in the ABC of fall arrest. Under 29 CFR 1926.502(d)(15), a non-engineered anchorage must support at least 5,000 pounds per attached worker; alternatively, it can be an engineered anchorage designed and supervised by a qualified person with a safety factor of at least two. Reference: 29 CFR 1926.502(d)(15) Regulation text (verbatim, 29 CFR 1926.502(d)(15)): Anchorages used for attachment of personal fall arrest equipment shall be independent of any anchorage being used to support or suspend platforms and capable of supporting at least 5,000 pounds (22.2 kN) per employee attached, or shall be designed, installed, and used as follows: (i) as part of a complete personal fall arrest system which maintains a safety factor of at least two; and (ii) under the supervision of a qualified person. ### Atmospheric Testing URL: https://hazcomfast.com/glossary/atmospheric-testing Measuring the air in a confined space (or other hazardous atmosphere) with a calibrated direct-reading instrument before and during entry. OSHA requires testing in a set order — oxygen first, then flammable gases and vapors, then potential toxic contaminants — and defines the acceptable ranges: oxygen 19.5%–23.5%, flammables below 10% of the LEL, toxics below their exposure limits. Reference: 29 CFR 1926.1204 / 1910.146 Regulation text (verbatim, 29 CFR 1926.1204(e)(3) (confined spaces)): When testing for atmospheric hazards, test first for oxygen, then for combustible gases and vapors, and then for toxic gases and vapors; ### Benching URL: https://hazcomfast.com/glossary/benching An excavation cave-in protective system that cuts the sides into a series of horizontal steps (benches), usually with vertical or near-vertical faces between levels. It's one of OSHA's accepted protective systems under Subpart P — but it is NOT permitted in Type C (the least stable) soil. Reference: 29 CFR 1926.650(b) / 1926.652 App B Regulation text (verbatim, 29 CFR 1926.650(b)): Benching (Benching system) means a method of protecting employees from cave-ins by excavating the sides of an excavation to form one or a series of horizontal levels or steps, usually with vertical or near-vertical surfaces between levels. ### Competent Person (Excavation) URL: https://hazcomfast.com/glossary/competent-person-excavation The competent person OSHA's excavation standard (Subpart P) requires on every trenching job — someone trained in soil classification and protective systems, who can identify cave-in and other hazards AND has authority to remove workers and correct problems. They must inspect the excavation daily before work starts, throughout the shift, and after any rain or event that could increase the hazard. Reference: 29 CFR 1926.651(k) Regulation text (verbatim, 29 CFR 1926.651(k)(1)): Daily inspections of excavations, the adjacent areas, and protective systems shall be made by a competent person for evidence of a situation that could result in possible cave-ins … An inspection shall be conducted by the competent person prior to the start of work and as needed throughout the shift. ### Confined Space URL: https://hazcomfast.com/glossary/confined-space A space that is large enough for a worker to bodily enter, has limited or restricted means of entry or exit, and is not designed for continuous occupancy. If it also contains — or could contain — a serious hazard (a hazardous atmosphere, engulfment material, an entrapping configuration, or any other recognized serious hazard), it becomes a permit-required confined space (PRCS). Reference: 29 CFR 1926.1202 / 1910.146 Regulation text (verbatim, 29 CFR 1926.1202): Confined space means a space that: (1) Is large enough and so configured that an employee can bodily enter it; (2) Has limited or restricted means for entry and exit; and (3) Is not designed for continuous employee occupancy. ### Controlling Employer URL: https://hazcomfast.com/glossary/controlling-employer Under OSHA's Multi-Employer Citation Policy (CPL 02-00-124), the controlling employer is an employer with general supervisory authority over a worksite — including the power to correct safety and health violations itself or to require others to correct them. This is typically the general contractor or construction manager. A controlling employer can be cited for a hazard at the site even if none of its own employees are exposed, because it has a duty to exercise reasonable care to prevent and detect violations by the other employers on site. Reference: OSHA Multi-Employer Citation Policy (CPL 02-00-124) Regulation text (summary, OSHA CPL 02-00-124 — Controlling Employer): A controlling employer is an employer who has general supervisory authority over the worksite, including the power to correct safety and health violations itself or require others to correct them. Control can be established by contract or... in the absence of explicit contractual provisions, by the exercise of control in practice. ### Crane Operator Certification URL: https://hazcomfast.com/glossary/crane-operator-certification OSHA's requirement (29 CFR 1926.1427) that construction crane operators be certified — by an accredited crane-operator testing organization or an employer's audited program — for the equipment type they run. The certifying body may issue by type, or by type and capacity (1926.1427(d)(1)(ii)(B)); capacity alone is not mandatory. Certification is one part: the employer must also train the operator and separately evaluate their ability to operate the specific equipment safely. Reference: 29 CFR 1926.1427 Regulation text (verbatim, 29 CFR 1926.1427(a)): The employer must ensure that each operator is trained, certified/licensed, and evaluated in accordance with this section before operating any equipment covered under subpart CC, except for the equipment listed in paragraph (a)(2) of this section. ### Electrical Safety (Construction) URL: https://hazcomfast.com/glossary/electrical-safety-construction The requirements of 29 CFR 1926 Subpart K, which protect construction workers from electrical hazards — shock, electrocution, arc flash, and fire. It covers ground-fault protection (GFCIs or an assured equipment grounding conductor program), proper wiring and grounding, safe distances from overhead power lines, lockout/tagout of energized equipment, and safe work practices. Electrocution is one of construction's “Fatal Four.” Reference: 29 CFR 1926 Subpart K Regulation text (verbatim, 29 CFR 1926.404(b)(1)(i)): The employer shall use either ground fault circuit interrupters as specified in paragraph (b)(1)(ii) of this section or an assured equipment grounding conductor program as specified in paragraph (b)(1)(iii) of this section to protect employees on construction sites. ### Excavation URL: https://hazcomfast.com/glossary/excavation Any man-made cut, cavity, trench, or depression formed by removing earth. Under OSHA's Subpart P, workers in an excavation must be protected from cave-ins by a protective system (sloping, benching, shoring, or shielding) at 5 feet or deeper. There are exactly two exceptions, and they are not interchangeable: an excavation made entirely in stable rock is exempt at any depth, while a competent person's examination can exempt an excavation only if it is less than 5 feet deep. Below 5 feet, that examination must actually have been made and must find no indication of a potential cave-in. Trenching and excavation are among construction's deadliest activities. Reference: 29 CFR 1926.652 Regulation text (verbatim, 29 CFR 1926.652(a)(1)): Each employee in an excavation shall be protected from cave-ins by an adequate protective system designed in accordance with paragraph (b) or (c) of this section except when: (i) Excavations are made entirely in stable rock; or (ii) Excavations are less than 5 feet (1.52m) in depth and examination of the ground by a competent person provides no indication of a potential cave-in. ### Exposing Employer URL: https://hazcomfast.com/glossary/exposing-employer Under OSHA's Multi-Employer Citation Policy (CPL 02-00-124), the exposing employer is an employer whose own employees are exposed to a hazard — regardless of who created it. If the exposing employer created the hazard, it is citable. If another employer created it, the exposing employer is still citable when it knew (or should have known) of the hazard and failed to take reasonable protective steps: correcting it if within its authority, or otherwise asking the creating/controlling employer to correct it, informing its employees, and taking feasible alternative protective measures. Reference: OSHA Multi-Employer Citation Policy (CPL 02-00-124) Regulation text (summary, OSHA CPL 02-00-124 — Exposing Employer): The exposing employer is an employer whose own employees are exposed to the hazard... If the exposing employer created the violation, it is citable for the violation as a creating employer. If the violation was created by another employer, the exposing employer is citable if it (1) knew of the hazardous condition or failed to exercise reasonable diligence to discover the condition, and (2) failed to take steps consistent with its authority to protect its employees. ### Fall Protection URL: https://hazcomfast.com/glossary/fall-protection The systems that keep workers from falling off elevated surfaces — guardrail systems, safety net systems, or personal fall arrest systems (PFAS). In construction, OSHA generally requires fall protection whenever a worker is exposed to a fall of 6 feet or more to a lower level (29 CFR 1926.501, Subpart M). It ranked first on OSHA's list of most-cited standards for FY2025. Reference: 29 CFR 1926.501 Regulation text (verbatim, 29 CFR 1926.501(b)(1)): Each employee on a walking/working surface (horizontal and vertical surface) with an unprotected side or edge which is 6 feet (1.8 m) or more above a lower level shall be protected from falling by the use of guardrail systems, safety net systems, or personal fall arrest systems. ### GFCI (Ground-Fault Circuit Interrupter) URL: https://hazcomfast.com/glossary/gfci A protective device that constantly compares the current flowing out to and back from a tool; if it detects even a small imbalance (current leaking to ground — like through a worker's body), it cuts the power in milliseconds. On construction sites, OSHA requires GFCI protection on 120-volt, 15- and 20-amp temporary receptacles to prevent electrocution. Reference: 29 CFR 1926.404(b)(1) Regulation text (verbatim, 29 CFR 1926.404(b)(1)(ii)): All 120-volt, single-phase, 15- and 20-ampere receptacle outlets on construction sites, which are not a part of the permanent wiring of the building or structure and which are in use by employees, shall have approved ground-fault circuit interrupters for personnel protection. ### Guardrail System URL: https://hazcomfast.com/glossary/guardrail-system A passive fall-protection barrier — a top rail, a midrail, and (where needed) a toeboard — installed along unprotected edges, holes, and elevated platforms. Under 29 CFR 1926.502(b), the top rail sits 42 inches (±3 inches) above the surface and must withstand a 200-pound force without deflecting below 39 inches; the midrail must withstand 150 pounds. Reference: 29 CFR 1926.502(b) Regulation text (verbatim, 29 CFR 1926.502(b)(1)): Top edge height of top rails, or equivalent guardrail system members, shall be 42 inches (1.1 m) plus or minus 3 inches (8 cm) above the walking/working level. ### Hot Work Permit URL: https://hazcomfast.com/glossary/hot-work-permit A written authorization, issued after a pre-work inspection, to perform welding, cutting, brazing, grinding, or other spark- or flame-producing operations in an area where fire or explosion hazards may exist. Under OSHA's welding and cutting standard (29 CFR 1910.252), the individual responsible for authorizing the work must inspect the area, confirm fire prevention precautions are in place, and designate the precautions — preferably as a written permit. The permit documents the location, the safeguards, the fire watch, and the authorization to proceed. Reference: 29 CFR 1910.252(a) (welding, cutting, brazing — fire prevention) Regulation text (verbatim, 29 CFR 1910.252(a)(2)(iii) — Fire watch (the permit itself is (a)(2)(iv), Authorization)): Fire watchers shall be required whenever welding or cutting is performed in locations where other than a minor fire might develop, or any of the following conditions exist: … A fire watch shall be maintained for at least a half hour after completion of welding or cutting operations to detect and extinguish possible smoldering fires. ### Job Hazard Analysis (JHA) URL: https://hazcomfast.com/glossary/job-hazard-analysis A systematic technique (OSHA Publication 3071) that breaks a job into its individual steps, identifies the hazards associated with each step, and determines controls to eliminate or reduce them. It focuses on the relationship between the worker, the task, the tools, and the work environment. Also called a Job Safety Analysis (JSA). Reference: OSHA Publication 3071 — Job Hazard Analysis Regulation text (summary, OSHA Publication 3071 (2002, revised)): A job hazard analysis is a technique that focuses on job tasks as a way to identify hazards before they occur. It focuses on the relationship between the worker, the task, the tools, and the work environment. ### Leading Edge URL: https://hazcomfast.com/glossary/leading-edge The edge of a floor, roof, or formwork that changes location as additional sections are placed, formed, or constructed — for example the advancing edge of a roof deck as sheets are laid. It's a moving, often unprotected drop-off. OSHA requires workers constructing a leading edge 6 feet or more above a lower level to be protected by a guardrail, safety net, or personal fall arrest system. Reference: 29 CFR 1926.500(b) & 1926.501(b)(2) Regulation text (verbatim, 29 CFR 1926.500(b)): Leading edge means the edge of a floor, roof, or formwork for a floor or other walking/working surface (such as the deck) which changes location as additional floor, roof, decking, or formwork sections are placed, formed, or constructed. ### LOTO (Lockout/Tagout) URL: https://hazcomfast.com/glossary/loto Procedures that isolate and de-energize machines during servicing and maintenance so they can't unexpectedly start up or release stored energy. Lockout applies a physical lock to an energy-isolating device; tagout applies a warning tag; lockout is preferred. Important scope note: the general-industry LOTO standard, 29 CFR 1910.147, explicitly excludes construction — construction energy control is enforced under 1926.417, 1926.702(j), Subpart V, and the General Duty Clause. Reference: 29 CFR 1910.147 (general industry); 1926.417 / 1926.702(j) (construction) Regulation text (summary, 29 CFR 1910.147(a)(1)(i)): This standard covers the servicing and maintenance of machines and equipment in which the unexpected energization or start up of the machines or equipment, or release of stored energy, could cause injury to employees. ### Near Miss URL: https://hazcomfast.com/glossary/near-miss An unplanned event that did not result in injury, illness, or damage — but had the potential to do so. Near misses (also called “close calls” or “near hits”) are a leading indicator of safety performance: reporting and investigating them lets you fix hazards before they cause harm. They are distinct from lagging indicators like recorded injuries. Reference: OSHA / NSC — Near Miss Reporting Regulation text (summary, OSHA/NIOSH — Near Miss Reporting Systems): A near miss is an unplanned event that did not result in injury, illness, or damage — but had the potential to do so. Reporting near misses is a proactive way to identify and correct hazards before they cause harm. ### PFAS (Personal Fall Arrest System) URL: https://hazcomfast.com/glossary/pfas A fall-arrest system made of an anchorage, a full-body harness, and a connector (lanyard or self-retracting lifeline), plus a deceleration device. Under 29 CFR 1926.502(d) it must limit the maximum arresting force on the worker to 1,800 lbf, allow a free fall of no more than 6 feet (and no contact with a lower level), and limit deceleration distance to 3.5 feet. Reference: 29 CFR 1926.502(d) Regulation text (verbatim, 29 CFR 1926.502(d)(16)): Personal fall arrest systems, when stopping a fall, shall: … (ii) limit maximum arresting force on an employee to 1,800 pounds (8 kN) when used with a body harness; (iii) be rigged such that an employee can neither free fall more than 6 feet (1.8 m), nor contact any lower level; (iv) bring an employee to a complete stop and limit maximum deceleration distance an employee travels to 3.5 feet (1.07 m); … ### Respirable Crystalline Silica URL: https://hazcomfast.com/glossary/respirable-crystalline-silica The very fine fraction of crystalline silica dust — particles small enough (generally under about 10 microns) to be inhaled deep into the lungs. It's created when workers cut, grind, drill, or crush silica-containing materials like concrete, stone, brick, and mortar. OSHA's construction standard (29 CFR 1926.1153) sets a permissible exposure limit (PEL) of 50 µg/m³ as an 8-hour TWA and an action level of 25 µg/m³. Reference: 29 CFR 1926.1153 Regulation text (verbatim, 29 CFR 1926.1153(d)(1)): The employer shall ensure that no employee is exposed to an airborne concentration of respirable crystalline silica in excess of 50 μg/m³, calculated as an 8-hour TWA. ### Root Cause Analysis (RCA) URL: https://hazcomfast.com/glossary/root-cause-analysis A structured investigation method that identifies the fundamental, underlying, system-related reason an incident (or near miss) occurred — not just its immediate symptom. OSHA and EPA both urge employers to perform RCA after incidents, because fixing only the immediate cause treats a symptom while leaving the real problem in place. Common techniques include the “5 Whys” and the Fishbone (Ishikawa) diagram. Reference: OSHA/EPA — Root Cause Analysis Fact Sheet Regulation text (summary, OSHA/EPA — Root Cause Analysis Fact Sheet): A root cause is a fundamental, underlying, system-related reason why an incident occurred that identifies one or more correctable system failures. ### Safety Net URL: https://hazcomfast.com/glossary/safety-net A passive fall protection system — a net installed below a walking/working surface to catch workers (and debris) who fall. OSHA's construction criteria (29 CFR 1926.502(c)) require it to be installed as close as practicable under the surface, but no more than 30 feet below, to extend outward a set distance from the edge, and to have mesh openings and a border rope meeting fixed limits, plus drop-test verification. Reference: 29 CFR 1926.502(c) Regulation text (verbatim, 29 CFR 1926.502(c)(1)): Safety nets shall be installed as close as practicable under the walking/working surface on which employees are working, but in no case more than 30 feet (9.1 m) below such level. ### Scaffold URL: https://hazcomfast.com/glossary/scaffold A temporary elevated platform (and its supporting structure) used to hold workers, materials, and equipment during construction. Under OSHA Subpart L, every scaffold must support its own weight plus at least 4 times the maximum intended load, be inspected by a competent person before each work shift, and provide fall protection for workers more than 10 feet above a lower level. Reference: 29 CFR 1926.451 Regulation text (verbatim, 29 CFR 1926.451(a)(1)): Except as provided in paragraphs (a)(2), (a)(3), (a)(4), (a)(5) and (g) of this section, each scaffold and scaffold component shall be capable of supporting, without failure, its own weight and at least 4 times the maximum intended load applied or transmitted to it. ### Secondary Container URL: https://hazcomfast.com/glossary/secondary-container A workplace container that a hazardous chemical is transferred into from the original, manufacturer-labeled (primary) container — for example a spray bottle, bucket, or drum you fill on site. Under HazCom (29 CFR 1910.1200(f)(6)), it must be labeled with either the full GHS label information or, at minimum, the product identifier plus words/pictures/symbols conveying the hazards — unless it qualifies for the “immediate use” exemption. Reference: 29 CFR 1910.1200(f)(6) Regulation text (verbatim, 29 CFR 1910.1200(f)(8)): The employer is not required to label portable containers into which hazardous chemicals are transferred from labeled containers, and which are intended only for the immediate use of the employee who performs the transfer. ### Shoring URL: https://hazcomfast.com/glossary/shoring An excavation protective system that braces the walls in place — with hydraulic, pneumatic, mechanical, or timber supports — to prevent a cave-in. Unlike a trench box (which protects the worker after a collapse), shoring actively holds the soil back so it doesn't move. It's one of OSHA's accepted Subpart P systems. Reference: 29 CFR 1926.650(b) / 1926.652 App C/D Regulation text (verbatim, 29 CFR 1926.650(b)): Shoring (Shoring system) means a structure such as a metal hydraulic, mechanical or timber shoring system that supports the sides of an excavation and which is designed to prevent cave-ins. ### Silicosis URL: https://hazcomfast.com/glossary/silicosis An incurable, irreversible fibrotic lung disease caused by inhaling respirable crystalline silica. Scar tissue forms in the lungs and progressively stiffens them, reducing the ability to breathe. It has three forms — chronic, accelerated, and acute — and can keep progressing even after exposure stops. It is preventable but has no cure. Reference: 29 CFR 1926.1153 (medical surveillance) Regulation text (summary, NIOSH — Health Effects of Occupational Exposure to RCS): Silicosis is an irreversible, often disabling, and sometimes fatal fibrotic lung disease. It is incurable but preventable, and progression can occur despite removal from further exposure. ### Sloping URL: https://hazcomfast.com/glossary/sloping An excavation cave-in protective system that cuts the trench walls back at an angle inclined away from the excavation so they can't collapse inward. The maximum allowable slope depends on the soil type — steeper for stable soil, flatter for loose soil: Type A 3/4:1 (53°), Type B 1:1 (45°), Type C 1½:1 (34°). Reference: 29 CFR 1926.650(b) / 1926.652 App B Regulation text (verbatim, 29 CFR 1926.650(b)): Sloping (Sloping system) means a method of protecting employees from cave-ins by excavating to form sides of an excavation that are inclined away from the excavation so as to prevent cave-ins. ### Soil Classification URL: https://hazcomfast.com/glossary/soil-classification The system OSHA uses (29 CFR 1926 Subpart P, Appendix A) to categorize excavation soil by stability, so a competent person can choose the correct protective system. The four categories — Stable Rock, Type A, Type B, and Type C — are keyed mainly to unconfined compressive strength: Type A is the most stable (≥1.5 tsf), Type C the least (≤0.5 tsf). Weaker soil requires flatter sloping or stronger shoring. Reference: 29 CFR 1926 Subpart P, Appendix A Regulation text (summary, 29 CFR 1926 Subpart P, App A): Type A means cohesive soils with an unconfined compressive strength of 1.5 ton per square foot (tsf) or greater. Type C means cohesive soil with an unconfined compressive strength of 0.5 tsf or less. ### Table 1 URL: https://hazcomfast.com/glossary/table-1 The chart in OSHA's construction silica standard (29 CFR 1926.1153(c)) titled “Specified Exposure Control Methods When Working With Materials Containing Crystalline Silica.” It pairs 18 common construction tasks with prescribed engineering controls, work practices, and respiratory protection. An employer that fully and properly implements the listed controls for a task is deemed in compliance with the exposure-limit requirement — with no air monitoring needed. Reference: 29 CFR 1926.1153(c) & Table 1 Regulation text (verbatim, 29 CFR 1926.1153(c)(1)): For each employee engaged in a task identified on Table 1, the employer shall fully and properly implement the engineering controls, work practices, and respiratory protection specified for the task on Table 1. ### Toolbox Talk URL: https://hazcomfast.com/glossary/toolbox-talk A short, informal safety meeting — usually 5 to 15 minutes, held at the jobsite before a shift — focused on one specific hazard or task relevant to that day's work. Also called a tailgate talk or safety briefing. OSHA does not mandate toolbox talks by name, but they're a widely used way to satisfy the employer's duty (29 CFR 1926.21(b)(2)) to instruct workers in recognizing and avoiding hazards. Reference: 29 CFR 1926.21(b)(2) (training duty) Regulation text (verbatim, 29 CFR 1926.21(b)(2)): The employer shall instruct each employee in the recognition and avoidance of unsafe conditions and the regulations applicable to his work environment to control or eliminate any hazards. ### Trench Box URL: https://hazcomfast.com/glossary/trench-box A prefabricated steel or aluminum structure (also called a shield or trench shield) placed in an excavation to protect workers from a cave-in. Critically, it does NOT prevent a cave-in — it's engineered to withstand the forces of one and keep the workers inside it safe. It's OSHA's “shielding” protective system under Subpart P. Reference: 29 CFR 1926.650(b) / 1926.652 Regulation text (verbatim, 29 CFR 1926.650(b)): Shield (Shield system) means a structure that is able to withstand the forces imposed on it by a cave-in and thereby protect employees within the structure. Shields can be permanent structures or can be designed to be portable and moved along as work progresses. ### Authorized Employee URL: https://hazcomfast.com/glossary/authorized-employee In OSHA's Lockout/Tagout standard (29 CFR 1910.147(b)), an authorized employee is the person who locks out or tags out machines or equipment to perform servicing or maintenance. They apply and remove the energy-isolating devices, so they must be trained to recognize the hazardous energy sources and know the procedures to control them. The role is task-specific: an employee can be authorized for one machine and merely affected for another. Reference: 29 CFR 1910.147(b) Regulation text (summary, 29 CFR 1910.147(b)): Authorized employee. A person who locks out or tags out machines or equipment in order to perform servicing or maintenance on that machine or equipment. ### Affected Employee URL: https://hazcomfast.com/glossary/affected-employee In OSHA's Lockout/Tagout standard (29 CFR 1910.147(b)), an affected employee is one whose job requires operating or using a machine that's being serviced under lockout/tagout, or whose job requires working in the area where that servicing is performed. Affected employees do not apply the locks — that's the authorized employee's role — but they must be notified before lockout begins and trained on the purpose and use of the procedures. Reference: 29 CFR 1910.147(b) Regulation text (summary, 29 CFR 1910.147(b)): Affected employee. An employee whose job requires him/her to operate or use a machine or equipment on which servicing or maintenance is being performed under lockout or tagout, or whose job requires him/her to work in an area in which such servicing or maintenance is being performed. ### Bloodborne Pathogens URL: https://hazcomfast.com/glossary/bloodborne-pathogens Pathogenic microorganisms present in human blood that can cause disease — primarily Human Immunodeficiency Virus (HIV), Hepatitis B Virus (HBV), and Hepatitis C Virus (HCV). OSHA's Bloodborne Pathogens Standard (29 CFR 1910.1030) applies to all workers with 'occupational exposure' — reasonably anticipated contact with blood or Other Potentially Infectious Materials (OPIM) — and requires a written Exposure Control Plan, engineering controls, PPE, HBV vaccination at no cost, annual training, and post-exposure follow-up. Reference: 29 CFR 1910.1030 Regulation text (verbatim, 29 CFR 1910.1030(b) — Occupational Exposure): Occupational Exposure means reasonably anticipated skin, eye, mucous membrane, or parenteral contact with blood or other potentially infectious materials that may result from the performance of an employee's duties. ### Combustible Dust URL: https://hazcomfast.com/glossary/combustible-dust Fine particles of a solid material that can catch fire and, when suspended in air at the right concentration, explode (deflagrate). Many everyday materials become combustible dust in finely divided form — wood, flour, sugar, grain, coal, plastics, and metals like aluminum and magnesium. OSHA has no single comprehensive combustible dust standard; it addresses the hazard through the General Duty Clause, the Hazard Communication Standard, and specific standards, alongside NFPA consensus standards. Reference: OSHA — Combustible Dust (GDC 5(a)(1) + HCS) Regulation text (summary, OSHA — Combustible Dust): Any combustible material can burn rapidly when in a finely divided form. If such a dust is suspended in air in the right concentration, under certain conditions, it can become explosible. ### Emergency Action Plan (EAP) URL: https://hazcomfast.com/glossary/emergency-action-plan A plan required by 29 CFR 1910.38 that spells out what workers do when an emergency happens — how to report it, how and where to evacuate, and how everyone is accounted for afterward. It must be in writing and available to employees (an employer with 10 or fewer employees may communicate it orally). An EAP is about responding to emergencies; its companion, the Fire Prevention Plan, is about preventing fires in the first place. Reference: 29 CFR 1910.38 Regulation text (verbatim, 29 CFR 1910.38(b)): An emergency action plan must be in writing, kept in the workplace, and available to employees for review. However, an employer with 10 or fewer employees may communicate the plan orally to employees. ### Fire Prevention Plan URL: https://hazcomfast.com/glossary/fire-prevention-plan A plan required by 29 CFR 1910.39 that focuses on preventing fires — by identifying major fire hazards, controlling their fuels and ignition sources, and maintaining fire-related equipment. It must be in writing and available to employees (an employer with 10 or fewer employees may communicate it orally). Where OSHA requires one, it typically accompanies an Emergency Action Plan, which covers what to do once a fire or emergency occurs. Reference: 29 CFR 1910.39 Regulation text (verbatim, 29 CFR 1910.39(c)(1)): A fire prevention plan must include: (1) A list of all major fire hazards, proper handling and storage procedures for hazardous materials, potential ignition sources and their control, and the type of fire protection equipment necessary to control each major hazard; ### Hazardous Energy URL: https://hazcomfast.com/glossary/hazardous-energy Any source of electrical, mechanical, hydraulic, pneumatic, chemical, thermal, or other energy in machines or equipment that can cause injury during servicing or maintenance if released unexpectedly. Under OSHA's Control of Hazardous Energy standard (29 CFR 1910.147, 'Lockout/Tagout'), equipment is 'energized' when connected to an energy source OR when it contains residual or stored energy. The standard requires that all such energy be isolated, locked out or tagged out, and verified as controlled before an authorized employee begins work. Reference: 29 CFR 1910.147 Regulation text (verbatim, 29 CFR 1910.147(b) — 'Energized'): Energized. Connected to an energy source or containing residual or stored energy. … Energy source. Any source of electrical, mechanical, hydraulic, pneumatic, chemical, thermal, or other energy. ### Hearing Conservation Program URL: https://hazcomfast.com/glossary/hearing-conservation-program A program 29 CFR 1910.95 requires in general industry whenever a worker's noise exposure equals or exceeds an 85 dBA 8-hour TWA — the "action level." It includes noise monitoring, audiometric (hearing) testing, hearing protectors, training, and recordkeeping, and its goal is to catch and prevent noise-induced hearing loss before it becomes permanent. Note the two thresholds: the program triggers at the 85 dBA action level, which sits below the 90 dBA permissible exposure limit. Reference: 29 CFR 1910.95 (general industry); 29 CFR 1926.52 (construction) Regulation text (verbatim, 29 CFR 1910.95(c)(1)): The employer shall administer a continuing, effective hearing conservation program ... whenever employee noise exposures equal or exceed an 8-hour time-weighted average sound level (TWA) of 85 decibels. ### Heat Illness Prevention URL: https://hazcomfast.com/glossary/heat-illness-prevention As of 2026, there is no final federal OSHA heat-illness standard. Heat hazards are enforced through the General Duty Clause (OSH Act Section 5(a)(1)) and OSHA's Heat National Emphasis Program (NEP, Directive CPL 03-00-024). OSHA has issued a proposed rule (NPRM, 89 FR 70698, Aug 30, 2024) that would establish heat-index triggers of 80°F (initial) and 90°F (high heat) for both outdoor and indoor workplaces. Until finalized, the 'Water. Rest. Shade.' campaign and OSHA-NIOSH Heat Safety Tool represent the enforcement-relevant guidance. No final federal OSHA heat standard as of 2026. A proposed rule (89 FR 70698, Aug 30, 2024) would set heat-index triggers of 80°F (initial) and 90°F (high heat). Until finalized, heat hazards are enforced under the General Duty Clause 5(a)(1) and OSHA's Heat NEP. Reference: OSH Act Section 5(a)(1) (General Duty Clause); OSHA Heat NEP (CPL 03-00-024) Regulation text (summary, OSH Act Section 5(a)(1) — General Duty Clause): Each employer shall furnish to each of his employees employment and a place of employment which are free from recognized hazards that are causing or are likely to cause death or serious physical harm to his employees. ### Medical Surveillance URL: https://hazcomfast.com/glossary/medical-surveillance An ongoing program of employer-provided medical exams and tests for workers exposed to specific hazards, required by substance-specific OSHA standards (silica, lead, asbestos, benzene, cadmium, and others). Its purpose is to detect early, often reversible signs of occupational disease — before permanent harm — and to determine fitness for tasks like respirator use. It's provided at no cost, on work time, and performed by or under a licensed health care professional (PLHCP), with results kept confidential. Reference: e.g., 29 CFR 1926.1153(h) (silica); 1910.1025 (lead) Regulation text (verbatim, 29 CFR 1926.1153(h)(1)(i) — construction): The employer shall make medical surveillance available at no cost to the employee, and at a reasonable time and place, for each employee who will be required under this section to use a respirator for 30 or more days per year. ### Noise Exposure URL: https://hazcomfast.com/glossary/noise-exposure OSHA's Permissible Exposure Limit (PEL) for occupational noise is 90 dBA as an 8-hour Time-Weighted Average (TWA) in both general industry (29 CFR 1910.95) and construction (29 CFR 1926.52). In general industry, an 85 dBA TWA action level triggers mandatory hearing conservation program requirements — monitoring, baseline and annual audiometric testing, hearing protection, and training. In construction, the 85 dBA action level is a NIOSH-recommended best practice, not a codified construction standard requirement. Both standards use a 5-dB exchange rate: for every 5 dB increase in noise level, the permissible exposure time is halved. Reference: 29 CFR 1910.95 (general industry); 29 CFR 1926.52 (construction) Regulation text (verbatim, 29 CFR 1910.95(a)): Protection against the effects of noise exposure shall be provided when the sound levels exceed those shown in Table G-16 when measured on the A scale of a standard sound level meter at slow response. ### Process Safety Management (PSM) URL: https://hazcomfast.com/glossary/process-safety-management OSHA's standard (29 CFR 1910.119) for preventing catastrophic releases of highly hazardous chemicals — toxic, reactive, flammable, or explosive substances that can cause a major fire, explosion, or toxic cloud. PSM applies when a process involves a listed highly hazardous chemical at or above its threshold quantity (Appendix A), or a Category 1 flammable gas or a flammable liquid (flashpoint below 100°F) present in one location at 10,000 pounds or more. It requires an integrated program of 14 interrelated elements, from process hazard analysis to mechanical integrity to management of change. Reference: 29 CFR 1910.119 Regulation text (summary, 29 CFR 1910.119(a)(1)): This section applies to... a process which involves a Category 1 flammable gas... or a flammable liquid with a flashpoint below 100 °F (37.8 °C) on site in one location, in a quantity of 10,000 pounds (4535.9 kg) or more. ### Respiratory Protection Program URL: https://hazcomfast.com/glossary/respiratory-protection-program The written, worksite-specific program 29 CFR 1910.134(c) requires wherever respirators are necessary to protect worker health (or the employer requires their use). Administered by a trained program administrator, it must cover respirator selection, medical evaluation, fit testing, proper use, maintenance and care, breathing-air quality, training, and program evaluation. Even voluntary respirator use carries requirements — a medical evaluation (for non-filtering-facepiece respirators) and the Appendix D information sheet. Reference: 29 CFR 1910.134 Regulation text (verbatim, 29 CFR 1910.134(c)(1)): In any workplace where respirators are necessary to protect the health of the employee ... the employer shall establish and implement a written respiratory protection program with worksite-specific procedures. ### Site-Specific Targeting (SST) URL: https://hazcomfast.com/glossary/site-specific-targeting OSHA's primary programmed-inspection plan for non-construction (general industry) establishments with 20 or more employees. SST uses the Form 300A injury and illness data — principally the DART rate — that employers submit through the Injury Tracking Application (ITA) to build inspection lists. Establishments are selected in several categories: those with high injury/illness rates, those with rates trending sharply upward, a sample of low-rate establishments for quality control, and establishments that failed to submit their required 300A data. The program is governed by a periodically reissued CPL directive (most recently updated in 2025). Reference: OSHA SST directive (CPL 02-01 series; CPL 02-01-064, Feb 7, 2023, updated 2025) Regulation text (summary, OSHA SST directive (CPL 02-01-064) — Purpose): This Instruction establishes the Site-Specific Targeting (SST) Program... [directing] programmed inspections to establishments with high rates of injuries and illnesses [using] Form 300A data submitted to OSHA through the Injury Tracking Application (ITA). ### Injury Tracking Application (ITA) URL: https://hazcomfast.com/glossary/injury-tracking-application OSHA's secure online portal for the electronic submission of workplace injury and illness records required under 29 CFR 1904.41. Annual submissions are due by March 2 each year for prior-calendar-year data. As amended by the July 21, 2023 final rule (effective 2024-01-01), there are three tiers: (1) 20–249 employees in an Appendix A (Subpart E) industry — submit Form 300A (summary only); (2) 100+ employees in an Appendix B (Subpart E) high-hazard industry (construction: NAICS 2381 only) — submit Forms 300, 301, and 300A; (3) 250+ employees not in a partially-exempt (Subpart B App A) industry — submit Form 300A (summary only). From construction, the Tier B high-hazard list reaches only NAICS 2381 (Foundation, Structure and Building Exterior Contractors); the rest of NAICS 23 is on Appendix A and submits the summary alone. Reference: 29 CFR 1904.41 Regulation text (verbatim, 29 CFR 1904.41(a)(2)): If your establishment had 100 or more employees at any time during the previous calendar year, and your establishment is classified in an industry listed in appendix B to subpart E of this part, then you must electronically submit information from OSHA Forms 300 and 301 to OSHA or OSHA's designee. ### Zero Energy State URL: https://hazcomfast.com/glossary/zero-energy-state The verified condition in which all energy sources to a machine or piece of equipment — electrical, mechanical, hydraulic, pneumatic, chemical, thermal, and gravitational — have been isolated, locked out or tagged out, and confirmed to hold no residual or stored energy. Achieving and verifying a zero energy state is the objective of the 29 CFR 1910.147 energy control procedure: the authorized employee must verify isolation and de-energization (1910.147(d)(6)) before any servicing or maintenance begins. Reference: 29 CFR 1910.147(d)(6) Regulation text (verbatim, 29 CFR 1910.147(d)(6) — Verification of isolation): Prior to starting work on machines or equipment that have been locked out or tagged out, the authorized employee shall verify that isolation and deenergization of the machine or equipment have been accomplished. ### Aerosol URL: https://hazcomfast.com/glossary/aerosol As a GHS/HazCom hazard class, an aerosol is a non-refillable pressurized container (an aerosol dispenser) — a can holding a gas compressed, liquefied, or dissolved under pressure, fitted with a release valve that ejects the contents as a spray, foam, paste, powder, liquid, or gas. HazCom classifies aerosols into three categories by their flammable content and heat of combustion: Category 1 (extremely flammable), Category 2 (flammable), and Category 3 (non-flammable). Reference: 29 CFR 1910.1200 App B.3 Regulation text (verbatim, 29 CFR 1910.1200 App B.3.1.1): Aerosol means any non-refillable receptacle containing a gas compressed, liquefied or dissolved under pressure, and fitted with a release device allowing the contents to be ejected as particles in suspension in a gas, or as a foam, paste, powder, liquid or gas. ### Flammable Gas URL: https://hazcomfast.com/glossary/flammable-gas A gas that has a flammable range with air at 20°C (68°F) and standard pressure. Under OSHA's HazCom 2024 update, flammable gases are classified as Category 1A, 1B, or 2. Category 1A is the most hazardous and now includes pyrophoric gases (those igniting spontaneously in air at or below 54°C) and chemically unstable gases (which can react explosively even without air). Examples include hydrogen, methane, propane, and acetylene. Reference: 29 CFR 1910.1200 App B.2 Regulation text (verbatim, 29 CFR 1910.1200 App B.2.1): Flammable gas means a gas having a flammable range with air at 20 °C (68 °F) and a standard pressure of 101.3 kPa (14.7 psi). A pyrophoric gas means a flammable gas that is liable to ignite spontaneously in air at a temperature of 54 °C (130 °F) or below. ### Organic Peroxide URL: https://hazcomfast.com/glossary/organic-peroxide A liquid or solid organic chemical containing the unstable bivalent –O–O– (peroxide) structure. Organic peroxides are thermally unstable and can undergo exothermic self-accelerating decomposition — meaning they generate their own heat and can accelerate toward fire or explosion, sometimes without any external ignition. GHS classifies them into seven types (A through G) by how violently they react; many require temperature control during storage. Reference: 29 CFR 1910.1200 App B.15 Regulation text (verbatim, 29 CFR 1910.1200 App B.15.1.1): Organic peroxide means a liquid or solid organic chemical which contains the bivalent -0-0- structure and as such is considered a derivative of hydrogen peroxide, where one or both of the hydrogen atoms have been replaced by organic radicals. The term organic peroxide includes organic peroxide mixtures containing at least one organic peroxide. Organic peroxides are thermally unstable chemicals, which may undergo exothermic self-accelerating decomposition. ### Pyrophoric URL: https://hazcomfast.com/glossary/pyrophoric A chemical that ignites spontaneously in air — no spark or flame needed. Under GHS/HazCom, a pyrophoric liquid or solid is one liable to ignite within five minutes after coming into contact with air, even in small quantities. (A pyrophoric gas ignites spontaneously in air at or below 54°C.) Pyrophorics carry the GHS02 flame pictogram and demand inert handling (nitrogen/argon blanketing). Reference: 29 CFR 1910.1200 App B.9 & B.10 Regulation text (verbatim, 29 CFR 1910.1200 App B.9.1): Pyrophoric liquid means a liquid which, even in small quantities, is liable to ignite within five minutes after coming into contact with air. ### Self-Heating Substance URL: https://hazcomfast.com/glossary/self-heating-substance A solid or liquid chemical — other than a pyrophoric — that reacts with air and, without any energy supply, is liable to self-heat. Unlike a pyrophoric (which ignites within minutes), a self-heating substance ignites only when present in large amounts (kilograms) and after long periods (hours or days), once the rate of internally generated heat outpaces the rate it can escape. GHS assigns Category 1 or 2, with the GHS02 flame pictogram. Reference: 29 CFR 1910.1200 App B.11 Regulation text (summary, 29 CFR 1910.1200 App B.11.1): A self-heating chemical is a solid or liquid chemical, other than a pyrophoric liquid or solid, which, by reaction with air and without energy supply, is liable to self-heat; this chemical differs from a pyrophoric ... in that it will ignite only when in large amounts (kilograms) and after long periods of time (hours or days). ### Water-Reactive Substance URL: https://hazcomfast.com/glossary/water-reactive-substance Under GHS/HazCom, a solid or liquid chemical that, on contact with water, becomes spontaneously flammable or gives off flammable gases in dangerous quantities. The GHS class is specifically about emitting flammable gas — sodium hitting water releasing hydrogen is the classic case. Three categories rank the hazard by how fast the flammable gas evolves and whether it ignites on its own. Reference: 29 CFR 1910.1200 App B.12 Regulation text (summary, 29 CFR 1910.1200 App B.12.1): Substances and mixtures which, in contact with water, emit flammable gases are solid or liquid chemicals which, by interaction with water, are liable to become spontaneously flammable or to give off flammable gases in dangerous quantities. ### Explosive URL: https://hazcomfast.com/glossary/explosive As a GHS/HazCom physical hazard class, an explosive is a solid or liquid chemical that is itself capable, by chemical reaction, of producing gas at such a temperature, pressure, and speed as to cause damage to the surroundings — as defined in Appendix B.1 of 29 CFR 1910.1200. The class is organized into six divisions (1.1 through 1.6) by the type and severity of the explosion hazard, plus a separate 'unstable explosive' designation for chemicals too thermally unstable or sensitive for normal handling. Explosives carry the exploding-bomb pictogram (GHS01). Reference: 29 CFR 1910.1200 App B.1 Regulation text (summary, 29 CFR 1910.1200 App B.1.1 — Definition): An explosive chemical is a solid or liquid chemical which is in itself capable by chemical reaction of producing gas at such a temperature and pressure and at such a speed as to cause damage to the surroundings. Pyrotechnic chemicals are included even when they do not evolve gases. ### Self-Reactive Substance URL: https://hazcomfast.com/glossary/self-reactive-substance A GHS/HazCom physical hazard class (Appendix B.8 of 29 CFR 1910.1200) covering thermally unstable liquid or solid chemicals liable to undergo a strongly exothermic decomposition even without the participation of oxygen (air). Self-reactive substances are sorted into seven types, A through G, by how violently they react when heated or confined: Type A can detonate or deflagrate rapidly as packaged, while Type G is thermally stable and shows no hazardous reaction. Types with explosive or fire properties carry the GHS01 (exploding bomb) and/or GHS02 (flame) pictogram. Reference: 29 CFR 1910.1200 App B.8 Regulation text (summary, 29 CFR 1910.1200 App B.8.1 — Definition): Self-reactive chemicals are thermally unstable liquid or solid chemicals liable to undergo a strongly exothermic decomposition even without participation of oxygen (air). This definition excludes chemicals classified under this Appendix as explosives, organic peroxides, oxidizing liquids or oxidizing solids. ### Serious Eye Damage / Eye Irritation URL: https://hazcomfast.com/glossary/serious-eye-damage A GHS/HazCom health hazard class (Appendix A.3 of 29 CFR 1910.1200) covering effects on the eye from a chemical. It is split by reversibility: Category 1 (serious eye damage) is the production of tissue damage or serious physical decay of vision that is NOT fully reversible within about 21 days; Category 2 (eye irritation) is a reversible change that fully resolves within 21 days, with subcategory 2A (irritating) and 2B (mildly irritating, reversible within 7 days). Category 1 uses the corrosion pictogram (GHS05); Category 2 uses the exclamation-mark pictogram (GHS07). Reference: 29 CFR 1910.1200 App A.3 Regulation text (verbatim, 29 CFR 1910.1200 App A.3.1.1): Serious eye damage refers to the production of tissue damage in the eye, or serious physical decay of vision, which is not fully reversible, occurring after exposure of the eye to a substance or mixture. Eye irritation refers to the production of changes in the eye, which are fully reversible, occurring after exposure of the eye to a substance or mixture. ### Hazardous to the Aquatic Environment (Aquatic Toxicity) URL: https://hazcomfast.com/glossary/aquatic-toxicity A GHS environmental hazard class describing a chemical's potential to harm aquatic life. It has two forms: ACUTE (short-term) aquatic toxicity, classified into Categories 1–3 from the concentration lethal or immobilizing to test organisms; and CHRONIC (long-term) aquatic toxicity, classified into Categories 1–4 from toxicity combined with environmental fate (degradation and bioaccumulation). Classification uses fish 96-hour LC50, crustacea 48-hour EC50, and algae 72/96-hour ErC50 data. It uses the GHS09 (environment) pictogram — but OSHA does NOT require environmental hazard classification, because it falls outside OSHA's human-health jurisdiction. Reference: GHS environmental criteria (GHS09); NOT mandated by 29 CFR 1910.1200 Regulation text (summary, 29 CFR 1910.1200 — OSHA scope (environmental class not required)): OSHA's Hazard Communication Standard addresses hazards to workers; classification of environmental (aquatic) hazards and the GHS09 environment pictogram are outside OSHA's jurisdiction and are not required on U.S. HazCom labels, though they may be included voluntarily (and are mandatory in jurisdictions such as the EU under CLP). ### Gas Under Pressure URL: https://hazcomfast.com/glossary/gas-under-pressure A GHS/HazCom physical hazard class (Appendix B.5 of 29 CFR 1910.1200) for gases contained in a receptacle at a pressure of 200 kPa (gauge) or more, or that are liquefied or refrigerated liquefied. It is divided into four groups by the physical state of the gas in the container: compressed gas, liquefied gas, refrigerated liquefied gas, and dissolved gas. The hazard is primarily physical — the stored energy of the pressurized (or cryogenic) contents can cause an explosion, projectile, or cold burn. Gases under pressure carry the GHS04 (gas cylinder) pictogram. Reference: 29 CFR 1910.1200 App B.5 Regulation text (summary, 29 CFR 1910.1200 App B.5.1 — Definition): Gases under pressure are gases which are contained in a receptacle at a pressure of 200 kPa (gauge) or more, or which are liquefied or liquefied and refrigerated. They comprise compressed gases, liquefied gases, dissolved gases and refrigerated liquefied gases. ### Simple Asphyxiant URL: https://hazcomfast.com/glossary/simple-asphyxiant A hazard classification, unique to OSHA's Hazard Communication Standard (29 CFR 1910.1200), for a substance or mixture that displaces oxygen in the ambient atmosphere and can thereby cause oxygen deprivation — leading to unconsciousness and death by suffocation. Simple asphyxiants have no chemical toxicity of their own; the danger is purely that they crowd out breathable oxygen. Any gas that is a simple asphyxiant must be labeled with the signal word 'Warning' and the hazard statement 'May displace oxygen and cause rapid suffocation.' Reference: 29 CFR 1910.1200(c) (definition); App C label elements Regulation text (verbatim, 29 CFR 1910.1200(c) — Definition): Simple asphyxiant means a substance or mixture that displaces oxygen in the ambient atmosphere, and can thus cause oxygen deprivation in those who are exposed, leading to unconsciousness and death. ### Biological Monitoring URL: https://hazcomfast.com/glossary/biological-monitoring Measuring a chemical or its breakdown product (metabolite) in a worker's biological specimen — usually blood, urine, or exhaled breath — to gauge how much of the substance the body has actually absorbed. Unlike air sampling, which measures what's in the breathing zone, biological monitoring captures total uptake across all routes, including skin absorption and ingestion. Results are often compared to ACGIH Biological Exposure Indices (BEIs). Reference: e.g., 29 CFR 1910.1025 (Lead) medical surveillance Regulation text (verbatim, 29 CFR 1910.1025(j)(2)(i) (Lead)): The employer shall make available biological monitoring in the form of blood sampling and analysis for lead and zinc protoporphyrin levels to each employee covered under paragraph (j)(1)(i) of this section on the following schedule: (A) At least every 6 months to each employee covered under paragraph (j)(1)(i) of this section; … ### Confined Space Entry Permit URL: https://hazcomfast.com/glossary/confined-space-entry-permit A written document that authorizes and documents entry into a permit-required confined space (PRCS) before anyone enters. It records the space, the purpose and authorized duration, the authorized entrants, the attendant(s) and entry supervisor, the space's hazards, the isolation and control measures, the acceptable entry conditions, atmospheric test results, rescue and emergency services, and communication procedures. In construction, permit-required confined spaces are governed by 29 CFR 1926 Subpart AA (permit contents at 1926.1206); general industry uses the parallel 29 CFR 1910.146 standard. Reference: 29 CFR 1926.1206 (construction); 29 CFR 1910.146 (general industry) Regulation text (verbatim, 29 CFR 1926.1205(a)–(c) — Permitting process): (a) Before entry is authorized, each entry employer must document the completion of measures required by § 1926.1204(c) by preparing an entry permit. (b) Before entry begins, the entry supervisor identified on the permit must sign the entry permit to authorize entry. (c) The completed permit must be made available at the time of entry to all authorized entrants or their authorized representatives, by posting it at the entry portal or by any other equally effective means, so that the entrants can confirm that pre-entry preparations have been completed. ### Ergonomics URL: https://hazcomfast.com/glossary/ergonomics The science of fitting the job to the worker — designing tasks, tools, and workstations around human capabilities and limits to prevent strain and injury. Poor ergonomics (repetitive motions, awkward postures, forceful exertions, sustained loads) causes musculoskeletal disorders (MSDs), one of the largest categories of workplace injury. OSHA has no specific ergonomics standard — its 2000 rule was repealed by Congress in 2001 — so it addresses ergonomic hazards through the General Duty Clause and voluntary guidelines. Reference: OSH Act §5(a)(1) (General Duty Clause) + OSHA guidelines Regulation text (summary, OSH Act §5(a)(1) — General Duty Clause): Each employer shall furnish to each of his employees ... a place of employment ... free from recognized hazards that are causing or are likely to cause death or serious physical harm. ### Hazardous Waste URL: https://hazcomfast.com/glossary/hazardous-waste A solid waste that is dangerous to human health or the environment and is regulated under the federal Resource Conservation and Recovery Act (RCRA), administered by the EPA (40 CFR Part 261). A waste is hazardous if it either exhibits one of four CHARACTERISTICS — ignitability (D001), corrosivity (D002), reactivity (D003), or toxicity (D004–D043, via the TCLP test) — or appears on one of the LISTED-waste lists: F (non-specific source), K (specific source), or P and U (discarded commercial chemical products, with P being acutely hazardous). Worker protection during hazardous-waste operations and emergency response is governed separately by OSHA's HAZWOPER standard (29 CFR 1910.120). Reference: EPA RCRA (40 CFR Part 261); OSHA HAZWOPER (29 CFR 1910.120) Regulation text (summary, 40 CFR 261.20–261.24 — Characteristics of hazardous waste): A solid waste... is a hazardous waste if it exhibits any of the characteristics of ignitability, corrosivity, reactivity, or toxicity [as defined by 40 CFR 261.21–261.24]. ### Material Safety Data Sheet (MSDS) URL: https://hazcomfast.com/glossary/msds The legacy hazard-communication document that preceded today's Safety Data Sheet (SDS). Before OSHA aligned the Hazard Communication Standard with the Globally Harmonized System (GHS) in 2012, MSDSs had no mandated section order or format, so information appeared in inconsistent places from one manufacturer to the next. The 2012 HazCom update replaced the MSDS with the standardized 16-section SDS. Under the transition schedule, compliance with all modified provisions — including GHS-aligned 16-section SDSs — was due June 1, 2015, with the phase-in closing June 1, 2016. The term 'MSDS' is now obsolete, though it persists in older files and everyday speech. Reference: 29 CFR 1910.1200(g) (HazCom — Safety Data Sheets) Regulation text (verbatim, 29 CFR 1910.1200(g)(2)): The chemical manufacturer or importer shall ensure that the safety data sheet is in English (although the employer may maintain copies in other languages as well), and includes at least the following section numbers and headings, and associated information under each heading, in the order listed (see appendix D to this section, for the specific content of each section of the safety data sheet): ### Occupational Exposure Limit (OEL) URL: https://hazcomfast.com/glossary/oel An umbrella term for any limit — regulatory or recommended — on a worker's airborne exposure to a hazardous substance over a defined period. An OEL isn't a single number or a single authority: it covers OSHA's enforceable Permissible Exposure Limits (PELs), NIOSH's Recommended Exposure Limits (RELs), and ACGIH's Threshold Limit Values (TLVs). Most OELs are expressed as an 8- (or 10-) hour time-weighted average, sometimes with short-term or ceiling limits. Reference: OSHA / NIOSH / ACGIH exposure limits Regulation text (summary, NIOSH — Occupational Exposure Limits): Occupational exposure limits are recommended or regulatory limits on the amount or concentration of a substance in the air, intended to protect workers over a working lifetime. ### Recommended Exposure Limit (REL) URL: https://hazcomfast.com/glossary/rel An occupational exposure limit recommended by NIOSH to protect workers from a hazardous substance. Unlike an OSHA PEL, a REL is not legally enforceable — NIOSH is a research agency, not an enforcement one — but RELs are often more protective because they reflect newer science. A NIOSH REL is typically a time-weighted average for up to a 10-hour workday during a 40-hour workweek, sometimes with a short-term (STEL) or ceiling limit. Reference: NIOSH — Recommended Exposure Limits Regulation text (summary, NIOSH Pocket Guide — RELs): For NIOSH RELs, “TWA” indicates a time-weighted average concentration for up to a 10-hour workday during a 40-hour workweek. NIOSH RELs are recommendations, not regulations. ### Risk Assessment URL: https://hazcomfast.com/glossary/risk-assessment A systematic process for identifying hazards and then evaluating the risk each one poses — combining the likelihood that harm occurs with the severity if it does — so controls can be prioritized. Risk assessment goes a step beyond simply spotting hazards: it judges how bad and how likely, which lets an organization focus effort on the biggest risks first. (OSHA standards more often use the narrower “hazard assessment,” e.g., for PPE under 1910.132(d).) Reference: OSHA — Hazard Identification / 1910.132(d) Regulation text (summary, OSHA — Hazard Identification and Assessment): Employers should collect and review information about the hazards present, then assess and prioritize the hazards and control measures so that the most serious hazards are addressed first. ### Safety Culture URL: https://hazcomfast.com/glossary/safety-culture The shared values, beliefs, attitudes, and behaviors that determine how an organization actually manages safety — beyond what its written policies say. A strong safety culture shows up in leading indicators such as near-miss reporting rates, worker participation, and prompt hazard correction, rather than only in lagging indicators like injury counts after the fact. OSHA does not enforce a mandatory 'safety culture' standard; instead it promotes safety-and-health programs built on seven core elements, and recognizes strong programs through voluntary initiatives such as the Voluntary Protection Programs (VPP). Reference: OSHA Recommended Practices for Safety and Health Programs (guidance, not a standard) Regulation text (summary, OSHA — Recommended Practices for Safety and Health Programs (guidance)): Finding and fixing hazards before they cause injury or illness is a far more effective approach [than reacting after incidents]. The recommended practices... [are built on] management leadership, worker participation, and a systematic approach to finding and fixing hazards. ### Asbestos URL: https://hazcomfast.com/glossary/asbestos A group of naturally occurring fibrous silicate minerals once widely used in insulation, fireproofing, flooring, and roofing. When asbestos-containing materials are disturbed, microscopic fibers become airborne and, when inhaled, cause asbestosis (lung scarring), lung cancer, and mesothelioma — a fatal cancer of the lung or abdominal lining. OSHA sets a permissible exposure limit of 0.1 fibers per cubic centimeter (f/cc) as an 8-hour TWA and an excursion limit of 1 f/cc over 30 minutes, under separate standards for construction (29 CFR 1926.1101), general industry (1910.1001), and shipyards (1915.1001). OSHA recognizes no "safe" level of asbestos exposure. Reference: 29 CFR 1926.1101 (construction); 1910.1001 (general industry); 1915.1001 (shipyards) Regulation text (verbatim, 29 CFR 1926.1101(c)(1) — Permissible exposure limit (TWA)): The employer shall ensure that no employee is exposed to an airborne concentration of asbestos in excess of 0.1 fiber per cubic centimeter of air as an eight (8) hour time-weighted average (TWA), as determined by the method prescribed in appendix A to this section. ### Lead URL: https://hazcomfast.com/glossary/lead A toxic heavy metal that accumulates in the body and damages the nervous system, kidneys, blood, and reproductive system. Occupational lead exposure is common in construction (demolition, renovation of painted surfaces, welding/cutting coated steel, bridge work) and in general industry (battery manufacturing, smelting, radiator repair). OSHA sets a permissible exposure limit of 50 µg/m³ as an 8-hour TWA and an action level of 30 µg/m³, under 29 CFR 1926.62 (construction) and 1910.1025 (general industry). A distinctive feature is Medical Removal Protection (MRP): workers with elevated blood lead levels must be removed from exposure with their earnings and benefits protected. Reference: 29 CFR 1926.62 (construction); 29 CFR 1910.1025 (general industry) Regulation text (verbatim, 29 CFR 1926.62(c)(1) — Permissible exposure limit): The employer shall assure that no employee is exposed to lead at concentrations greater than fifty micrograms per cubic meter of air (50 µg/m3) averaged over an 8-hour period. ### Benzene URL: https://hazcomfast.com/glossary/benzene A colorless, sweet-smelling flammable liquid and a confirmed human carcinogen that causes leukemia and other blood disorders (including aplastic anemia). Benzene is found in crude oil, gasoline, and many industrial processes. OSHA regulates it under 29 CFR 1910.1028 with a permissible exposure limit of 1 ppm as an 8-hour TWA, a short-term exposure limit (STEL) of 5 ppm over any 15-minute period, and an action level of 0.5 ppm. Employers must establish regulated areas wherever exposures exceed the PEL or STEL. Reference: 29 CFR 1910.1028 Regulation text (verbatim, 29 CFR 1910.1028(c) — Permissible exposure limits): The employer shall assure that no employee is exposed to an airborne concentration of benzene in excess of one part of benzene per million parts of air (1 ppm) as an 8-hour time-weighted average. … The employer shall assure that no employee is exposed to an airborne concentration of benzene in excess of five (5) ppm as averaged over any 15 minute period. ### Hexavalent Chromium URL: https://hazcomfast.com/glossary/hexavalent-chromium A toxic form of the metal chromium (chromium in the +6 oxidation state, "Cr(VI)") that is a confirmed carcinogen and a potent respiratory and skin irritant. It is produced during welding on stainless steel, chrome electroplating, and the use of chromate pigments and coatings. OSHA regulates Cr(VI) under 29 CFR 1926.1126 (construction) and 1910.1026 (general industry) with a permissible exposure limit of 5 µg/m³ as an 8-hour TWA and an action level of 2.5 µg/m³. Reference: 29 CFR 1926.1126 (construction); 29 CFR 1910.1026 (general industry) Regulation text (verbatim, 29 CFR 1926.1126(c) — Permissible exposure limit (PEL)): The employer shall ensure that no employee is exposed to an airborne concentration of chromium (VI) in excess of 5 micrograms per cubic meter of air (5 µg/m3), calculated as an 8-hour time-weighted average (TWA). ### Formaldehyde URL: https://hazcomfast.com/glossary/formaldehyde A colorless, pungent gas (often used in water solution as formalin) that is a confirmed carcinogen and a strong respiratory and skin sensitizer. It is used in resins, adhesives, composite wood products, embalming, and many laboratory and industrial processes. OSHA regulates it under 29 CFR 1910.1048 with a permissible exposure limit of 0.75 ppm as an 8-hour TWA, a short-term exposure limit (STEL) of 2 ppm over any 15-minute period, and an action level of 0.5 ppm. Reference: 29 CFR 1910.1048 Regulation text (verbatim, 29 CFR 1910.1048(c) — Permissible exposure limits): The employer shall assure that no employee is exposed to an airborne concentration of formaldehyde which exceeds 0.75 parts formaldehyde per million parts of air (0.75 ppm) as an 8-hour TWA. … The employer shall assure that no employee is exposed to an airborne concentration of formaldehyde which exceeds two parts formaldehyde per million parts of air (2 ppm) as a 15-minute STEL. ### Cadmium URL: https://hazcomfast.com/glossary/cadmium A soft, toxic heavy metal used in batteries (nickel-cadmium), pigments, coatings/electroplating, and some solders and alloys. Inhaling cadmium fume or dust damages the lungs and kidneys and causes cancer. OSHA regulates it under 29 CFR 1926.1127 (construction) and 1910.1027 (general industry) with a permissible exposure limit of 5 µg/m³ as an 8-hour TWA and an action level of 2.5 µg/m³. Reference: 29 CFR 1926.1127 (construction); 29 CFR 1910.1027 (general industry) Regulation text (verbatim, 29 CFR 1926.1127(c) — Permissible exposure limit): The employer shall assure that no employee is exposed to an airborne concentration of cadmium in excess of five micrograms per cubic meter of air (5 µg/m3), calculated as an eight-hour time-weighted average exposure (TWA). ### Respirator Fit Test URL: https://hazcomfast.com/glossary/fit-test A required test that verifies a tight-fitting respirator forms an adequate seal on a specific worker's face. Under 29 CFR 1910.134(f), a fit test must be performed before the first use of a tight-fitting respirator, whenever a different facepiece (make, model, style, or size) is used, when facial changes could affect the seal, and at least every 12 months (annually). Two methods exist: Qualitative (QLFT), a pass/fail test based on the wearer's sense of taste, smell, or irritation, valid only up to a fit factor of 100; and Quantitative (QNFT), which numerically measures leakage (pass criterion: fit factor ≥ 100 for a half mask, ≥ 500 for a full facepiece). A medical evaluation must precede fit testing. Reference: 29 CFR 1910.134(f) Regulation text (verbatim, 29 CFR 1910.134(f)(2)): The employer shall ensure that an employee using a tight-fitting facepiece respirator is fit tested prior to initial use of the respirator, whenever a different respirator facepiece (size, style, model or make) is used, and at least annually thereafter. ### Assigned Protection Factor (APF) URL: https://hazcomfast.com/glossary/assigned-protection-factor The workplace level of respiratory protection that a properly functioning respirator (or class of respirators) is expected to provide to a properly fitted and trained user. OSHA codifies APFs in Table 1 of 29 CFR 1910.134(d)(3)(i). An APF of 10 means the respirator reduces the wearer's exposure to one-tenth of the ambient concentration. Representative values: half-mask air-purifying = 10; full-facepiece air-purifying = 50; loose-fitting PAPR/hood = 25; tight-fitting full-facepiece PAPR = 1000; and full-facepiece pressure-demand SCBA = 10,000. The APF is used to compute the Maximum Use Concentration (MUC = APF × PEL). Reference: 29 CFR 1910.134(d)(3)(i) Regulation text (verbatim, 29 CFR 1910.134(b) — Definition): Assigned protection factor (APF) means the workplace level of respiratory protection that a respirator or class of respirators is expected to provide to employees when the employer implements a continuing, effective respiratory protection program as specified by this section. ### Filtering Facepiece Respirator (N95) URL: https://hazcomfast.com/glossary/filtering-facepiece-respirator A disposable, tight-fitting air-purifying respirator in which the entire facepiece is the filter — most familiarly the N95. It filters airborne particles but provides NO protection against gases, vapors, or oxygen-deficient atmospheres. NIOSH certifies particulate filters under 42 CFR Part 84 by oil resistance (N = Restricted to workplaces free of oil aerosols, R = Intended for particulates that include oil-based liquids, P = Also intended for oil-based particulates; the usual mnemonic reads P as oil-proof) and efficiency (95 = ≥ 95%, 99 = ≥ 99%, 100 = ≥ 99.97% (HEPA-equivalent, 29 CFR 1910.134(b))), giving nine classes. As a tight-fitting respirator it has an assigned protection factor of 10 and, when used to comply with OSHA requirements, needs fit testing, medical evaluation, and a written program. Reference: 29 CFR 1910.134; NIOSH 42 CFR Part 84 Regulation text (verbatim, 29 CFR 1910.134(b) — Definition): Filtering facepiece (dust mask) means a negative pressure particulate respirator with a filter as an integral part of the facepiece or with the entire facepiece composed of the filtering medium. ### Self-Contained Breathing Apparatus (SCBA) URL: https://hazcomfast.com/glossary/self-contained-breathing-apparatus An atmosphere-supplying respirator in which the wearer carries their own breathing-air supply in a cylinder, rather than filtering the surrounding air. Because it does not depend on ambient air quality, an SCBA is the highest level of respiratory protection and is required for the most hazardous atmospheres. A full-facepiece pressure-demand SCBA has the maximum assigned protection factor of 10,000. For IDLH atmospheres, OSHA (29 CFR 1910.134(d)(2)) permits only a full-facepiece pressure-demand SCBA certified for at least a 30-minute service life, or a combination supplied-air respirator with an auxiliary self-contained air supply. Reference: 29 CFR 1910.134(d)(2), Table 1 Regulation text (verbatim, 29 CFR 1910.134(d)(2)(i) — IDLH atmospheres): The employer shall provide the following respirators for employee use in IDLH atmospheres: (A) A full facepiece pressure demand SCBA certified by NIOSH for a minimum service life of thirty minutes, or (B) A combination full facepiece pressure demand supplied-air respirator (SAR) with auxiliary self-contained air supply. ### Powered Air-Purifying Respirator (PAPR) URL: https://hazcomfast.com/glossary/powered-air-purifying-respirator An air-purifying respirator that uses a battery-powered blower to draw ambient air through filters or cartridges and deliver it to the wearer. Because the blower supplies air, a PAPR maintains positive pressure inside the facepiece/hood, reducing inward leakage and breathing effort. PAPRs come in tight-fitting (facepiece) and loose-fitting (hood/helmet) forms with different assigned protection factors: a loose-fitting PAPR/hood has an APF of 25, while a tight-fitting full-facepiece PAPR can reach an APF of 1,000. Like all air-purifying respirators, a PAPR does NOT protect against oxygen-deficient or IDLH atmospheres. Reference: 29 CFR 1910.134, Table 1 Regulation text (verbatim, 29 CFR 1910.134(b) — Definition): Powered air-purifying respirator (PAPR) means an air-purifying respirator that uses a blower to force the ambient air through air-purifying elements to the inlet covering. ### User Seal Check URL: https://hazcomfast.com/glossary/user-seal-check A quick check the wearer performs EACH time a tight-fitting respirator is put on, immediately before entering a hazardous area, to confirm the facepiece is seated and sealing properly that day. Under 29 CFR 1910.134(g)(1)(iii) and Appendix B-1, it is done as a negative-pressure check (block the inlet, inhale gently — the facepiece should collapse slightly and hold) and/or a positive-pressure check (block the exhalation valve, exhale gently — the facepiece should bulge slightly and hold without leaking). A user seal check is NOT a substitute for a fit test; it verifies today's donning, not the periodic qualification of the respirator to the wearer. Reference: 29 CFR 1910.134(g)(1)(iii), Appendix B-1 Regulation text (verbatim, 29 CFR 1910.134(g)(1)(iii)): For all tight-fitting respirators, the employer shall ensure that employees perform a user seal check each time they put on the respirator using the procedures in appendix B-1 or procedures recommended by the respirator manufacturer that the employer demonstrates are as effective. ### Aerial Lift URL: https://hazcomfast.com/glossary/aerial-lift A vehicle-mounted, boom-supported aerial device used to elevate personnel to jobsites above ground. OSHA (29 CFR 1926.453) lists five types: extensible boom platforms, aerial ladders, articulating boom platforms, vertical towers, and combinations. Workers in an aerial lift must wear a body belt (or harness) with a lanyard attached to the boom or basket. Note: scissor lifts are NOT aerial lifts — OSHA treats them as mobile scaffolds. Reference: 29 CFR 1926.453 Regulation text (verbatim, 29 CFR 1926.453(b)(2)(v)): A body belt shall be worn and a lanyard attached to the boom or basket when working from an aerial lift. ### Competent Person (Scaffold) URL: https://hazcomfast.com/glossary/competent-person-scaffold The competent person OSHA's scaffold standard (Subpart L) requires — someone able to identify scaffold hazards and authorized to correct them. They must inspect the scaffold and its components for visible defects before each work shift and after any occurrence that could affect its structural integrity, and they oversee safe erection, moving, alteration, and dismantling. Reference: 29 CFR 1926.451(f)(3) Regulation text (verbatim, 29 CFR 1926.451(f)(3)): Scaffolds and scaffold components shall be inspected for visible defects by a competent person before each work shift, and after any occurrence which could affect a scaffold's structural integrity. ### Caught-In/Between Hazard URL: https://hazcomfast.com/glossary/caught-in-between One of OSHA's construction “Focus Four” hazards. It occurs when a worker is caught, crushed, squeezed, or compressed between two or more objects, or between parts of an object — for example a trench cave-in, being pinned by unguarded machinery, or an equipment rollover. The defining feature is crushing/compression, which distinguishes it from a struck-by injury. Reference: OSHA — Construction Focus Four Regulation text (summary, OSHA — Construction Focus Four (Caught-In/Between)): Caught-in or -between hazards are those where a worker is caught, crushed, squeezed, compressed, or pinched between two or more objects, or between parts of an object. If the injury was created by crushing between objects, the event is caught-in/between. ### Electrocution URL: https://hazcomfast.com/glossary/electrocution Death caused by exposure to electrical energy — one of OSHA's construction “Focus Four” leading causes of death. It results from contact with energized circuits, overhead or buried power lines, or faulty equipment. (An electrical injury that isn't fatal is an electric shock; electrocution specifically means death.) Prevention centers on de-energizing, GFCIs, clearances from power lines, and grounding. Reference: OSHA — Construction Focus Four / 1926 Subpart K Regulation text (summary, OSHA — Construction Focus Four (Electrocution)): Electrocution results when a person is exposed to a lethal amount of electrical energy. Electrocution is death caused by electrical energy; an electrical injury that is not fatal is an electric shock. ### Focus Four Hazards URL: https://hazcomfast.com/glossary/focus-four OSHA's name for the four leading causes of death in construction: Falls, Struck-By, Caught-In/Between, and Electrocution. Together they account for the largest share of construction worker deaths — with falls alone the single leading cause — so OSHA concentrates its construction training and enforcement on them. Also called the “Fatal Four.” Reference: OSHA — Construction Focus Four Regulation text (summary, OSHA — Construction Focus Four): The four leading causes of construction fatalities are falls, struck-by object, caught-in or -between, and electrocution; together they account for the majority of construction worker deaths. ### Struck-By Hazard URL: https://hazcomfast.com/glossary/struck-by One of OSHA's construction “Focus Four” hazards — injury or death from being hit by a moving object. OSHA groups struck-by into four types: flying (e.g., from a tool or grinder), falling (dropped or wind-blown objects), swinging (loads, booms), and rolling (vehicles, equipment). If the impact alone caused the injury, it's struck-by (not caught-in/between). Reference: OSHA — Construction Focus Four Regulation text (summary, OSHA — Construction Focus Four (Struck-By)): Struck-by injuries are produced by forcible contact or impact between the injured person and an object or piece of equipment. They are categorized as struck-by flying, falling, swinging, or rolling objects. ### Trenching URL: https://hazcomfast.com/glossary/trenching Working in a trench — a narrow excavation (narrow relative to its length) made below the ground surface, where the depth is generally greater than the width and the width at the bottom is 15 feet or less. Trenches are the deadliest form of excavation: like all excavations, they require cave-in protection at 5 feet or deeper (unless in stable rock). Reference: 29 CFR 1926.650(b) / Subpart P Regulation text (verbatim, 29 CFR 1926.650(b)): Trench (Trench excavation) means a narrow excavation (in relation to its length) made below the surface of the ground. In general, the depth is greater than the width, but the width of a trench (measured at the bottom) is not greater than 15 feet. ### Wet Stacking URL: https://hazcomfast.com/glossary/wet-stacking A condition in diesel engines — most commonly standby and jobsite generators — in which unburned fuel and carbon soot accumulate in the exhaust system because the engine has run for extended periods at too low a load (typically below about 60% of rated output). At light load, the combustion temperature is too low to burn all the injected fuel, so the excess passes into the exhaust as a wet, oily residue at the exhaust 'stack.' Wet stacking fouls injectors, valves, and the turbocharger, degrades performance and efficiency, and creates a real fire hazard because unburned fuel and soot can ignite in the hot exhaust. It is corrected by running the unit under adequate load — often via a load bank at roughly 75% capacity for several hours. Reference: N/A — equipment-condition term; related fire/CO hazards addressed under General Duty Clause & 1910.106/1910.157 Regulation text (summary, Note — factual correction): Wet stacking is a diesel-engine/generator condition (unburned fuel and carbon accumulating in the exhaust from prolonged low-load operation) — NOT a masonry practice. There is no single OSHA standard for wet stacking; the associated fire and carbon-monoxide hazards are addressed under the General Duty Clause and standards such as 1910.106 (flammable liquids) and portable-generator CO guidance. ## Guides (202) - [OSHA Top 10 Most Cited Violations 2026: Complete Rankings & How to Avoid Them](https://hazcomfast.com/blog/osha-top-10-most-cited-violations-2026): OSHA's preliminary Top 10 for FY2026: fall protection leads, then hazard communication and lockout/tagout. Every standard on the list, the citations behind it, and how to fix it before your next inspection. - [Does Your Safety Software Manufacture Evidence Against You?](https://hazcomfast.com/blog/does-your-safety-software-manufacture-evidence-against-you): A lockout removal saved with both verification boxes unchecked. A permit closed with no fire watch sign-off. Your compliance software just generated, timestamped, and preserved a signed record of the thing you didn't do — and it will export it beautifully for the inspector. The failure mode nobody audits for, and the test that finds it. - [Is NFPA 51B Required by OSHA? What Construction Actually Incorporates](https://hazcomfast.com/blog/is-nfpa-51b-required-by-osha): Everyone calls NFPA 51B 'the OSHA hot work standard.' It isn't one. 29 CFR 1926.6 — the list of standards OSHA construction adopts as law — names six NFPA documents, and 51B is not among them. The list, the citation, and what it changes on your permit. - [Does OSHA Certify Competent Persons? No — What an Inspector Actually Asks to See](https://hazcomfast.com/blog/does-osha-certify-competent-persons-designation): There is no such thing as an 'OSHA-certified competent person.' A competent person is DESIGNATED by the employer — and what an inspector asks to see is the designation, not a training certificate. The four documents that prove one. - [Is Exactly 10% LEL Safe? OSHA Defines It Two Ways — and Enforces the Stricter One](https://hazcomfast.com/blog/is-exactly-10-percent-lel-safe-osha-confined-space): OSHA's definition says a hazardous atmosphere is flammable gas 'in excess of 10 percent' of the LEL — so 10.0% reads as acceptable. Every other OSHA document says the opposite. This article shows what the enforcement directive actually settles, with verbatim citations. - [HCS 2024 Deadlines by State Plan: Why November 20, 2026 Is the Wrong Date in Most of Them](https://hazcomfast.com/blog/hcs-2024-deadlines-by-state-plan): We read twenty-two state plans instead of assuming they match federal. Washington's substances deadline was July 20, 2026, already past, and on the face of their own rules Michigan and Minnesota land on that same date, not November 20. California has not adopted HCS 2024 at all. What each rule actually says, and how to check yours in ten minutes. - [The Trench Geometry Problem: Why OSHA's Slope Table Rules Sloping Out of Most Jobs](https://hazcomfast.com/blog/trench-geometry-problem-osha-slope-table-analysis): Sloping is the protective system everyone pictures first. Run the arithmetic of OSHA's Table B-1 and it disappears from most real jobsites by about six feet of depth — here is the math, and what it means for how you plan a dig. - [Struck-By Vehicles: Backovers, Work Zones, and the OSHA Rules](https://hazcomfast.com/blog/osha-struck-by-vehicles-backover-work-zone-safety): Struck-by vehicles is a leading struck-by hazard in construction — one in four struck-by-vehicle deaths is a construction worker. The OSHA reverse-alarm rule, flaggers, high-visibility apparel, and how to design backovers out of the job. - [The Struck-By Paradox: Construction's #2 Killer vs. Where OSHA Actually Cites](https://hazcomfast.com/blog/struck-by-construction-deaths-vs-osha-citations-analysis): Struck-by is the second-leading cause of construction death, yet the equipment behind it — forklifts, vehicles, cranes — is nowhere in OSHA's top-cited construction standards. An original analysis of the FY2025 citation data against the fatality record. - [The Silicosis Comeback: Engineered-Stone Workers and the Respirator Program That Should Have Stopped It](https://hazcomfast.com/blog/engineered-stone-silicosis-respirator-program-osha): Silicosis was supposed to be a disease of the past. Instead it came back — fast and fatal — among young men cutting engineered-stone countertops. California alone has confirmed 219 cases, at least 14 deaths, and 26 lung transplants. This is the data, the dust, and the OSHA respirator program that is the last line of defense when the controls upstream fail. - [Trained Too Late: The Data on New-Worker Injuries and OSHA's Only Top-10 Training Standard](https://hazcomfast.com/blog/new-worker-injuries-osha-training-gap-data): The most dangerous stretch of a job is often the first few months. In the US, workers with a year or less on the job are about a quarter of the workforce but a third of the injuries that cost days away from work — and the one standard in OSHA's Top 10 whose entire subject is training gets cited thousands of times a year. This is the data on the training gap, and what OSHA actually requires to close it. - [Who Dies in Confined Spaces: 1,030 Deaths, and Why So Many Are Rescuers](https://hazcomfast.com/blog/confined-space-deaths-bls-data-rescuer-fatalities-osha): The Bureau of Labor Statistics counted 1,030 confined-space worker deaths from 2011 to 2018, and NIOSH's landmark finding is that more than 60% of confined-space fatalities are would-be rescuers. This study lays out the data — the causes, the gases, the rescuer multiplier — and the OSHA Subpart AA rules written to stop each one. - [Facial Hair and Respirators: OSHA's Beard Rule and the PAPR Fix](https://hazcomfast.com/blog/facial-hair-respirators-osha-beard-rule): OSHA bars facial hair that crosses a tight-fitting respirator's seal (1910.134(g)(1)(i)). This guide covers what is actually allowed, the clean-shaven fit-test rule, and the loose-fitting PAPR fix for beards you can't shave. - [Why Hot Work Keeps Killing: 15 CSB Investigations and the OSHA Rules Behind Them](https://hazcomfast.com/blog/hot-work-deaths-csb-investigations-osha-analysis): The U.S. Chemical Safety Board has investigated 15 fatal hot-work incidents since 2001, and they share one pattern: a flammable atmosphere in or around a tank, and no gas monitoring before the torch. This study lays out the CSB record, the seven lessons it drew, and the exact OSHA standards that cite what the CSB investigates. - [N95 vs P100: The NIOSH Respirator Filter Classes, Decoded](https://hazcomfast.com/blog/n95-vs-p100-niosh-respirator-filter-classes): The letter is oil resistance, the number is efficiency. This guide decodes the nine NIOSH filter classes (42 CFR 84), N95 vs P100 in practice, and why the filter doesn't change your assigned protection factor. - [Confined Space Training by Role: Entrant, Attendant, Supervisor](https://hazcomfast.com/blog/confined-space-training-entrant-attendant-supervisor): A permit-required confined space entry has four trained roles, and each owes different duties. This guide covers what the authorized entrant, attendant, entry supervisor, and rescue team must know under 1926 Subpart AA. - [Crane Operator Certification & Qualification (1926.1427)](https://hazcomfast.com/blog/osha-crane-operator-certification-1926-1427): Certifying a crane operator is only half of what OSHA requires. Under 1926.1427 you must also evaluate and document that the operator can run the specific equipment — plus qualify the signal person and rigger. - [Does OSHA Enforcement Actually Work? What the Randomized Evidence Shows](https://hazcomfast.com/blog/does-osha-enforcement-work-randomized-inspection-data-analysis): Most debates about OSHA are opinion. One study settled the question with the gold standard of evidence — a randomized experiment — and found inspections cut injuries 9.4% and injury costs 26% with no detectable job loss. A data analysis of whether enforcement works, by how much, and why targeting is now the whole game. - [The $181 Billion Question: What a Workplace Injury Really Costs](https://hazcomfast.com/blog/economic-cost-workplace-injuries-181-billion-data-analysis): US work injuries cost $181.4 billion in 2024 by the fullest count — but 'the cost' is really three different numbers that differ by threefold, and most companies budget against the smallest one. A data analysis of what an injury actually costs, and why the number you choose decides how much safety you can afford. - [The HCS 2024 Phase-In by the Numbers — and the Cost of Waiting](https://hazcomfast.com/blog/hcs-2024-phase-in-cost-of-waiting-data-analysis): A data analysis of OSHA's HCS 2024 (GHS Rev 7) rollout — not one deadline but four, running from 2026 to 2028 — against the enforcement reality that Hazard Communication is already OSHA's #2 most-cited standard. Why a compliance date is not a start date. - [Thermal Runaway: The Workplace Fire Hazard OSHA Has No Standard For](https://hazcomfast.com/blog/lithium-ion-battery-fires-workplace-hazard-data-analysis): A data analysis of the lithium-ion battery fire surge — from FDNY's fire logs to EPA's waste-facility data to CPSC's injury curve — and the regulatory reality that OSHA has no lithium-battery standard, only the General Duty Clause and a HazCom hook most employers miss. - [The Hidden Toll: The Work Deaths No Census Counts](https://hazcomfast.com/blog/occupational-disease-deaths-hidden-toll-data-analysis): A data analysis of the largest gap in US workplace-safety statistics — 5,070 workers were counted as killed on the job in 2024, but an estimated 135,000 die each year from occupational diseases the official fatality census is not built to count. - [The 63-Day Standard: Why the #1 Workplace Injury Has No OSHA Rule](https://hazcomfast.com/blog/osha-ergonomics-standard-gap-msd-data-analysis): A data analysis of the ergonomics gap — musculoskeletal disorders are about a third of every serious workplace injury and the single most expensive, yet OSHA has no ergonomics standard. The one it issued in 2000 was in force for 63 days before Congress erased it. - [The Data Behind America's First Workplace Heat Standard](https://hazcomfast.com/blog/osha-heat-standard-data-behind-the-rule-analysis): A data analysis of the case for a federal heat rule — the recorded death and illness toll, why the real numbers are almost certainly higher, and what OSHA's proposed 80°F and 90°F heat-index triggers would actually require of 36 million workers' employers. - [Once Every 191 Years: The Data on OSHA's Inspection Capacity](https://hazcomfast.com/blog/osha-inspection-capacity-once-every-191-years-data-analysis): A data analysis of how thin OSHA enforcement really is — 1,651 federal and state inspectors for 12 million workplaces, with federal OSHA's own corps at the lowest count in the agency's history and able to reach each workplace in its jurisdiction once every 191 years. And why that math should change how you think about compliance, not encourage you to gamble on it. - [Frozen in 1971: The Data Behind OSHA's Outdated Exposure Limits](https://hazcomfast.com/blog/osha-pels-frozen-since-1971-data-analysis): An original analysis of OSHA's permissible exposure limits — fewer than 500 chemicals have one, most carry a number a committee chose in 1968, and a 1989 attempt to modernize 376 of them was struck down in court. Why 'meeting the PEL' is the legal floor, not a safe ceiling. - [Frozen for a Generation: The Data on OSHA's Penalty History](https://hazcomfast.com/blog/osha-penalties-history-frozen-then-indexed-data-analysis): A data analysis of how OSHA's maximum fines actually moved — set in 1990, frozen for 26 years while inflation quietly halved their bite, restored by a 78% catch-up in 2016, and indexed annually since. Why the 2026 figures are what they are, and why 2026 was not an increase. - [OSHA's Regulatory Pipeline: The Rules Still Coming — and Why They Take So Long](https://hazcomfast.com/blog/osha-regulatory-pipeline-standards-in-development-data-analysis): The biggest workplace hazards without an OSHA standard — heat, workplace violence, infectious disease — are all somewhere in a rulemaking pipeline that has historically averaged more than seven years per standard. A data analysis of what's in the queue, what stage each has reached, and why 'no rule yet' is the default for a decade at a time. - [19,690 Amputations and Hospitalizations: What OSHA's Severe Injury Data Reveals](https://hazcomfast.com/blog/osha-severe-injury-reports-amputations-hospitalizations-data-analysis): Since 2015, employers have had to report to OSHA within 24 hours every time a worker loses a body part or lands in a hospital bed. Two years of that data — 19,690 reports — draw a precise map of how American workers get maimed, and expose the structural blind spot that hides roughly half of the real total. - [OSHA's Top 10 for FY2025: The Most-Cited Standards as a Syllabus](https://hazcomfast.com/blog/osha-top-10-violations-decade-of-stability-data-analysis): A data analysis of OSHA's FY2025 most-cited standards: 29 CFR 1926.501 topped the list, 6,772 construction citations sit behind it, and the ten standards together work as an open-book exam. Why that published list is the most useful fact in compliance. - [The PFAS Paradox: Regulated in Water, Silent on the SDS](https://hazcomfast.com/blog/pfas-forever-chemicals-workplace-exposure-gap-data-analysis): A data analysis of the regulatory asymmetry around 'forever chemicals' — the EPA now limits PFOA and PFOS to 4 parts per trillion in drinking water, yet OSHA has no workplace exposure limit for any of the thousands of PFAS. Why the safety data sheet is the worker's only systematic warning. - [What 5,070 Workplace Deaths in 2024 Reveal: A CFOI Data Analysis](https://hazcomfast.com/blog/us-workplace-fatalities-2024-cfoi-data-analysis): An original analysis of the BLS Census of Fatal Occupational Injuries for 2024 — 5,070 deaths, a 10-year trend line, the six ways workers die, and the uncomfortable finding that the hazard killing the most workers is the one OSHA regulates least directly. - [The Injury Pyramid: What 2.5 Million Workplace Injuries in 2024 Reveal](https://hazcomfast.com/blog/us-workplace-injuries-2024-soii-data-analysis): An original analysis of the BLS Survey of Occupational Injuries and Illnesses for 2024 — 2.5 million recordable cases, a record-low rate, and the injury pyramid that sits beneath every workplace death: about 493 recorded injuries for each one. - [Who Dies at Work: The Demographics Behind 5,070 Deaths](https://hazcomfast.com/blog/who-dies-at-work-demographics-fatal-injury-data-analysis): A data analysis of who the 5,070 workers killed in 2024 actually were — and the uncomfortable finding that fatal risk is not shared evenly. Workers 65 and older die at nearly three times the average rate, and Hispanic or Latino workers well above it. - [Workplace Violence: The Fatal Hazard OSHA Still Doesn't Regulate](https://hazcomfast.com/blog/workplace-violence-data-osha-regulatory-gap-analysis): Workplace homicides rose to 470 in 2024 — and it is the one major fatal hazard for which OSHA has no standard at all. A data analysis of the regulatory gap, the unequal burden, and what employers must do anyway. - [The Anatomy of an OSHA Construction Inspection: A Data-Driven Walkthrough](https://hazcomfast.com/blog/anatomy-osha-construction-inspection-fy2025-data): What actually happens when OSHA inspects a construction site — quantified. In FY2025, 10,793 federal construction inspections produced 26,559 citations and $109.0 million in penalties. This analysis walks the funnel from what triggers a visit to what it finds, why one state agency cites more than six times per inspection and another fewer than twice, and what an inspector sees in the first five minutes. - [Construction Safety Enforcement in FY2025: An OSHA Data Analysis](https://hazcomfast.com/blog/construction-osha-enforcement-fy2025-data-analysis): An original analysis of federal OSHA's FY2025 construction enforcement — 26,559 citations and $109.0M in penalties — showing how a single standard, fall protection, drives 41% of the dollars and reshapes where a contractor should spend its safety budget. - [The HazCom Enforcement Paradox: #2 Everywhere, 9th in Construction](https://hazcomfast.com/blog/hazcom-enforcement-by-state-fy2025-analysis): Hazard Communication is OSHA's second most-cited standard across all industries — yet only ninth in construction. And one state, Maryland, issues nearly as many construction HazCom citations as the entire federal system — 609 against 698, from a single state. An FY2025 data analysis of where the chemical-safety citations actually land. - [How OSHA Actually Prices a Violation: The Gravity-Based Penalty, Decoded](https://hazcomfast.com/blog/how-osha-calculates-penalty-gravity-based-decoded): OSHA does not pick a fine off the top of the $16,550 cap. It runs a two-stage formula: a Gravity-Based Penalty set by severity × probability, then a cascade of reductions for size, good faith, and history. Here is the actual 2026 matrix and how a $16,550 base becomes a much smaller check. - [Every State Has an OSHA Enforcement Signature: A FY2025 Heatmap](https://hazcomfast.com/blog/osha-construction-citations-state-standard-heatmap): Break FY2025 construction citations down by state AND by standard, and a pattern appears that no single ranking captures: every state agency has an enforcement 'signature.' Maryland hammers labels and ladders; Virginia concentrates on scaffolds; Tennessee spreads across chemicals. An original heatmap of where each state cites what. - [OSHA Construction Enforcement in 2026: The Definitive Statistics](https://hazcomfast.com/blog/osha-construction-enforcement-2026-key-statistics): A single, sourced reference for the numbers that define construction safety enforcement in 2026 — citations, penalties, the deadliest and most-cited hazards, the state-by-state variation, and the fatality data behind it all. Every figure is drawn from OSHA and BLS primary sources and links to the full analysis. - [The $7,000 vs. $25,000 Divide: How OSHA Penalty Caps Vary by State](https://hazcomfast.com/blog/osha-penalty-caps-by-state-data-analysis): Most people assume State-Plan OSHA programs are stricter than federal. The data says otherwise: the same serious violation is capped at $25,000 in California but just $7,000 in Michigan, Kentucky, Indiana, and Tennessee. Here is the verified 2026 penalty-cap map and why it matters. - [Volume vs. Value: How State OSHA Programs Enforce Differently](https://hazcomfast.com/blog/state-osha-enforcement-styles-volume-vs-value): The 22 State-Plan OSHA programs don't just set different penalty caps — they enforce in fundamentally different styles. Michigan writes thousands of low-dollar construction citations; Nevada writes a few hundred high-dollar ones. An FY2025 data analysis of enforcement volume versus value across 21 state agencies. - [The True Price of a Fall: From a $6,629 Citation to a Life](https://hazcomfast.com/blog/true-price-of-a-construction-fall-cost-analysis): The average OSHA fall-protection citation carries about $6,629 in penalties (current amounts) — and it is the smallest cost a fall imposes. This analysis builds the full cost cascade, from the citation to the injury, through OSHA's own Safety Pays multiplier, to the sales a company must generate to survive one fall — and, ultimately, to the 389 construction workers a year for whom the cost is a life. - [Why Falls Stay #1: The Convergence of Deaths, Citations, and Dollars](https://hazcomfast.com/blog/why-falls-stay-osha-number-one-construction-hazard): Falls are the leading cause of construction death, the most-cited OSHA standard, and the single largest source of penalty dollars — all at the same time. This analysis shows how three independent datasets converge on one hazard, and why the most-regulated risk in construction is still the one that kills most. - [Confined Spaces in Construction (Subpart AA) vs General Industry (1910.146): Don't Cite the Wrong Standard](https://hazcomfast.com/blog/confined-spaces-construction-subpart-aa-vs-1910-146): Construction confined space work falls under 29 CFR 1926 Subpart AA, not 1910.146. Here is the exact difference, a section-by-section CFR map, the controlling-contractor rules, and how to avoid citing the wrong standard. - [Hexavalent Chromium in Construction (1926.1126): PEL, Welding & Required Monitoring](https://hazcomfast.com/blog/hexavalent-chromium-construction-1926-1126): OSHA's construction hexavalent chromium standard 29 CFR 1926.1126 sets a 5 µg/m³ PEL and a 2.5 µg/m³ action level. OSHA names welding on stainless steel as a major exposure source. - [OSHA Forklift / Powered Industrial Truck Classes I-VII: Construction Cheat Sheet](https://hazcomfast.com/blog/osha-forklift-pit-classes-construction-cheat-sheet): Powered industrial trucks split into seven classes. On construction sites OSHA 1926.602 governs material handling equipment, and operator training mirrors the 1910.178(l) rules. - [OSHA Ladder Safety in Construction: 1926 Subpart X Rules & the 4-Foot Rule](https://hazcomfast.com/blog/osha-ladder-safety-construction-subpart-x-4-foot): OSHA regulates construction ladders under 29 CFR 1926 Subpart X (1926.1050–1926.1060). Learn the 4-foot access rule, the 3-foot extension rule, and load and angle requirements. - [OSHA Noise & Hearing Conservation in Construction: 90 dBA PEL and the 85 dBA Myth](https://hazcomfast.com/blog/osha-noise-construction-90-dba-85-dba-myth): The OSHA construction noise PEL is 90 dBA TWA under 1926.52, not 85 dBA. Learn why 85 dBA is a general-industry number and what hearing conservation construction actually requires. - [OSHA Respirator Fit Testing in Construction: Qualitative vs Quantitative & Who Pays](https://hazcomfast.com/blog/osha-respirator-fit-testing-construction-qlft-qnft): OSHA requires fit testing before a tight-fitting respirator is used and at least annually. This guide covers qualitative vs quantitative, when each applies, and who pays. - [OSHA Crystalline Silica Medical Surveillance: The 30-Day Respirator Trigger](https://hazcomfast.com/blog/osha-silica-medical-surveillance-30-day-respirator): In construction, OSHA silica medical surveillance is triggered by required respirator use for 30 or more days per year under 1926.1153(h) — not by the PEL alone. This guide explains how it works. - [OSHA Safety Training Requirements: Complete Employer Guide](https://hazcomfast.com/blog/osha-safety-training-requirements-2026): Every OSHA training requirement employers must meet in 2026. Covers HazCom, fall protection, confined space, LOTO, and more. Includes frequencies, documentation rules, and penalty avoidance. - [OSHA Respiratory Protection Program: Complete Compliance Guide](https://hazcomfast.com/blog/osha-respiratory-protection-program-complete-guide): Everything you need to know about OSHA's Respiratory Protection Standard (29 CFR 1910.134). From fit testing to medical evaluations, written programs, and SCBA requirements — a complete employer guide for 2026. - [OSHA Lead Exposure Standards: Complete Construction Guide](https://hazcomfast.com/blog/osha-lead-exposure-standards-construction-guide): Comprehensive guide to OSHA's Lead Standards for construction (29 CFR 1926.62) and general industry (1910.1025). Covers PELs, action levels, medical surveillance, exposure monitoring, and compliance requirements for 2026. - [OSHA Welding Safety Requirements: Complete Guide for Construction](https://hazcomfast.com/blog/osha-welding-safety-requirements-construction-guide): Complete guide to OSHA welding, cutting, and brazing safety requirements for construction. Covers hot work permits, fire watch, ventilation, PPE, confined space welding, and common citation prevention for 2026. - [OSHA Forklift Certification Requirements: Complete Training Guide](https://hazcomfast.com/blog/osha-forklift-certification-requirements-training-guide): Everything employers need to know about OSHA forklift operator training and certification requirements (29 CFR 1910.178). Covers training content, evaluation, refresher training, and common violations to avoid in 2026. - [Scaffold Safety: OSHA Requirements Every Contractor Must Know](https://hazcomfast.com/blog/scaffold-safety-osha-requirements-construction-2026): Scaffolding (1926.451) ranked sixth on OSHA's FY2025 list of most-cited standards. Learn the capacity rules, fall-protection triggers, competent-person duties, and how to avoid $16,550 per violation. - [OSHA Machine Guarding Requirements: Complete Employer Guide](https://hazcomfast.com/blog/osha-machine-guarding-requirements-complete-guide): Comprehensive guide to OSHA machine guarding standards (29 CFR 1910 Subpart O). Covers point-of-operation guards, power transmission guarding, types of safeguards, and how to avoid the most common machine guarding citations in 2026. - [Electrical Safety in Construction: OSHA & NFPA 70E Essentials](https://hazcomfast.com/blog/electrical-safety-construction-osha-nfpa-70e): Electrocution is one of construction's Focus Four hazards. This guide covers exactly what OSHA Subpart K requires — GFCI, the 10-foot rule, LOTO 1926.417 — plus how NFPA 70E arc-flash protection fits in. - [Workplace Violence Prevention: OSHA Requirements & Employer Guide](https://hazcomfast.com/blog/workplace-violence-prevention-osha-requirements-guide): Complete employer guide to workplace violence prevention under OSHA requirements. Covers written prevention programs, risk assessments, training, incident response, and compliance with new state laws for 2026. - [Trenching & Excavation Safety: OSHA's Life-Saving Rules for Construction](https://hazcomfast.com/blog/trenching-excavation-safety-osha-construction-2026): A trench wall fails in seconds and there is no outrunning it. OSHA's excavation standards, soil classification, the four protective systems, and the competent-person duties that prevent cave-ins. - [Crane & Rigging Safety: OSHA Requirements for Construction Contractors](https://hazcomfast.com/blog/crane-rigging-safety-osha-construction-guide): Cranes are governed by 29 CFR 1926 Subpart CC. Master operator certification, load charts, load-weight verification, sling-angle math, signal persons, and power-line clearance — with a worked critical-lift example. - [Job Hazard Analysis (JHA): Free Template & Step-by-Step Guide](https://hazcomfast.com/blog/job-hazard-analysis-jha-template-guide): A Job Hazard Analysis breaks every task into steps, identifies hazards at each step, and assigns controls. Download our free JHA template and learn a 5-step method built on OSHA's Job Hazard Analysis booklet. - [Confined Space Entry: OSHA Permit-Required Guide for Construction](https://hazcomfast.com/blog/confined-space-entry-permit-required-osha-guide): Complete guide to confined space entry in construction under 29 CFR 1926 Subpart AA. Covers permit-required vs non-permit spaces, atmospheric testing order, the entry permit, rescue duties, multi-employer coordination, and the citation traps that get contractors fined. - [The Ultimate Toolbox Talk Guide: Engagement & Compliance](https://hazcomfast.com/blog/toolbox-talk-guide): Toolbox talks aren't OSHA-mandated by name, but the training they document is. Learn the 4-step framework, a defensible sign-in sheet, the right frequency, and how to make a 5-minute talk actually change behavior. - [GHS Label Requirements: The Complete Guide](https://hazcomfast.com/blog/ghs-label-requirements-complete-guide): Every mandatory element of an OSHA GHS label — the six required parts of a shipped label, the two options for workplace/secondary containers, the immediate-use exception, and the small-package rules HCS 2024 added. - [SDS Management Best Practices: Cradle-to-Grave](https://hazcomfast.com/blog/sds-management-best-practices): Effective SDS management requires more than a binder. Learn the 'cradle-to-grave' lifecycle, 30-year archiving rules, and digital indexing strategies. - [Does OSHA Require Safety Data Sheets in Spanish?](https://hazcomfast.com/blog/does-osha-require-sds-in-spanish): No for the document, yes for the training. 29 CFR 1910.1200(g)(2) requires the SDS in English and only permits other languages; the same standard, OSHA's 2010 policy statement and the 2026 HazCom directive require training in a language the worker understands. Which one an inspector cites, and what a defensible bilingual program looks like. - [Does OSHA Require You to Separate Incompatible Chemicals?](https://hazcomfast.com/blog/does-osha-require-separating-incompatible-chemicals): Mostly no — and knowing exactly where the 'no' ends is what keeps you off a citation. The Hazard Communication Standard imposes no storage segregation rule. The explicit federal separation sentences are rare and narrow. The segregation charts your crew follows come from fire code. And OSHA can still cite the pile of oxidizers next to the solvents, through the General Duty Clause. - [Is There a Passing Score for an OSHA Forklift Evaluation?](https://hazcomfast.com/blog/is-there-a-passing-score-for-osha-forklift-evaluation): No. 29 CFR 1910.178(l) contains no percentage, no grade and no pass mark — and the '80% to pass' number the training market sells can quietly convert a mandatory retraining trigger into a green light. What the rule actually demands is demonstrated competence, observed in the workplace, certified by name and date. - [Are Safety Incentive Programs Legal Under OSHA? What 1904.35 Actually Prohibits](https://hazcomfast.com/blog/are-safety-incentive-programs-legal-osha): Yes. Safety bonuses, zero-injury awards and post-incident drug testing are all legal under 29 CFR 1904.35(b)(1)(iv). What the rule prohibits is punishing a worker for reporting. OSHA's 2018 position, the precautions that keep a rate-based program lawful, and the program designs OSHA calls always permissible. - [The GC Wants Your OSHA 300 Log Before You Can Bid. Do You Have to Provide It?](https://hazcomfast.com/blog/give-osha-300-log-to-general-contractor): No OSHA rule requires you to hand your 300 Log to a general contractor, owner or prequalification platform — and if you choose to share it, 1904.29(b)(10) requires the employee names to come off first. Who actually holds a right to your records, what to send instead, and the redaction the rule makes mandatory. - [Do SDSs Expire? How Often to Update Your SDS Binder](https://hazcomfast.com/blog/do-sds-expire-how-often-update-sds-binder): OSHA sets no expiration date on a Safety Data Sheet and no interval for reviewing your library — which is exactly why binders go stale. Here is who actually owes the update, what your compliance really turns on, a trigger-based review calendar, and what OSHA says to do with the sheet you're replacing. - [Does Every Chemical Need an SDS? The OSHA Exemptions, Explained](https://hazcomfast.com/blog/does-every-chemical-need-an-sds): Not everything on your jobsite needs a Safety Data Sheet. OSHA's Hazard Communication Standard exempts articles, consumer products used like a consumer would, food, drugs, and more — but every exemption is narrower than it sounds. Here is the full decision tree, with the gray-area calls spelled out. - [Missing an SDS: How to Triage the Gaps in Your Library](https://hazcomfast.com/blog/missing-sds-how-to-close-library-gaps): The chemical is already on site, in use, and there's no Safety Data Sheet for it. This is the other missing-SDS problem — not a shipment that arrived empty-handed, but a hole you discover in a library you thought was complete. This guide shows how to find the gaps, decide which to close first, and handle the moment an inspector asks. - [OSHA's July 2025 Penalty Cuts: How Small Businesses Stack Reductions to 80%+](https://hazcomfast.com/blog/osha-small-business-penalty-reductions-july-2025): OSHA's July 14, 2025 update handed small employers a much bigger break: a 70% size cut now reaches 25 employees, and a new 15% 'quick-fix' rewards fixing the hazard on the spot. Stacked, a small firm can cut a fine by more than 80%. This guide shows how each reduction works and how to earn it. - [HAZWOPER Training Levels: 40, 24 & 8-Hour Explained](https://hazcomfast.com/blog/hazwoper-training-levels-40-24-8-hour): 40-hour, 24-hour, 8-hour refresher: HAZWOPER training levels confuse everyone. Who needs which, the field-experience days, the supervisor add-on, and the five emergency-response levels. - [How to Calculate TRIR & DART from the OSHA 300 Log](https://hazcomfast.com/blog/how-to-calculate-trir-dart-incident-rate): Your OSHA 300 log holds every number you need to compute TRIR and DART. Here are the exact formulas, worked examples, the columns that feed each rate, and how to benchmark the result. - [How to Correct or Update the OSHA 300 Log](https://hazcomfast.com/blog/how-to-correct-update-osha-300-log): An entry on the 300 log isn't frozen once you write it. OSHA requires you to keep the log current for five years: how to correct an error, reclassify a case, and add a late-discovered injury the right way. - [NFPA 704 & HMIS vs GHS Labels: Can You Use the Fire Diamond?](https://hazcomfast.com/blog/nfpa-704-hmis-vs-ghs-labels): Can the NFPA fire diamond or an HMIS bar label be your workplace container label? Yes, with conditions. What OSHA allows, and the reversed 0-4 vs 1-4 rating trap that confuses everyone. - [OSHA 10 vs OSHA 30: What Each Covers & State Mandates](https://hazcomfast.com/blog/osha-10-vs-30-construction-state-mandates): OSHA 10 and 30-hour cards are everywhere on construction sites, but they're voluntary, they don't satisfy your training duties by themselves, and some states require them. What each one actually is. - [Hearing Conservation Program & Annual Training (1910.95)](https://hazcomfast.com/blog/osha-hearing-conservation-program-annual-training): At 85 dBA over an 8-hour day, OSHA requires a full hearing conservation program — monitoring, audiograms, hearing protection, and annual training. What the program contains and what the training must cover. - [Supplier Won't Provide an SDS? Your OSHA Duty (+ a Request Letter)](https://hazcomfast.com/blog/supplier-wont-provide-sds-what-to-do): A chemical showed up without a Safety Data Sheet and the supplier isn't responding. Whose legal duty it is under OSHA, the step-by-step to get the sheet, and a copy-paste request letter. - [Is a Near Miss OSHA Recordable? The Log, the Report, and the Confusion](https://hazcomfast.com/blog/is-a-near-miss-osha-recordable): A near miss is not OSHA recordable and not reportable — no injury means no 1904.7 trigger. Here is why, the one training exception, and why you should still log every one. - [Is It Work-Related? The 9 OSHA Exceptions That Make an Injury Not Recordable](https://hazcomfast.com/blog/osha-work-relatedness-exceptions-recordable): An injury in the work environment is presumed work-related — but 29 CFR 1904.5(b)(2) lists nine exceptions that make it NOT recordable. The parking lot, the common cold, and seven more, with the aggravation rule. - [The OSHA Citation Defense Package: What Evidence Wins a Contest](https://hazcomfast.com/blog/osha-citation-defense-package-evidence-guide): When you contest an OSHA citation or sit down at the informal conference, the outcome turns less on argument than on evidence — the records you can produce, dated and complete, on demand. This is a field guide to the defense package that earns penalty reductions and dismissals, and how to assemble it before you ever need it. - [The 8 OSHA Pictograms vs the 9 GHS Pictograms: Why the Environment Symbol Isn't Required](https://hazcomfast.com/blog/8-osha-pictograms-vs-9-ghs-pictograms): OSHA requires 8 GHS pictograms on chemical labels; the 9th environment symbol (GHS09) is voluntary. Why, where else it is required, and how to keep your US labels compliant. - [Aerosols Reclassified Under HCS 2024: Why There's Now a Category 3 (Non-Flammable)](https://hazcomfast.com/blog/aerosols-category-3-hcs-2024-reclassification): HCS 2024 turned the old flammable-aerosol category into a full Aerosols hazard class (Appendix B.3) with three categories — including a brand-new non-flammable Category 3 that carries a signal word and a hazard statement but no pictogram at all. - [Chemicals Under Pressure: OSHA's New HCS 2024 Hazard Class (Appendix B.3.2) Explained](https://hazcomfast.com/blog/chemicals-under-pressure-hcs-2024-hazard-class): HCS 2024 adds Chemicals Under Pressure as a new physical hazard class at Appendix B.3.2. What it covers, the pressure threshold, how it differs from aerosols and gases, and the deadlines. - [Desensitized Explosives: The New HCS 2024 Hazard Class (Appendix B.17) and What It Means for Your SDS](https://hazcomfast.com/blog/desensitized-explosives-hcs-2024-hazard-class): HCS 2024 adds Desensitized Explosives as a new physical hazard class at Appendix B.17. Here is how it is classified (the four categories), what changes on the SDS and label, the pictogram, real examples, and the deadlines. - [Flammable Liquid Categories Decoded: Flash Point and Boiling Point Thresholds (Cat 1-4)](https://hazcomfast.com/blog/flammable-liquid-categories-flash-point-thresholds): GHS sorts flammable liquids into 4 categories by flash point and boiling point. See the exact Cat 1-4 thresholds in °C and °F, signal words, pictograms, and how OSHA HazCom classification drives the label. - [The 6 Required Elements of a GHS Shipped Label (with a Field-Checkable Checklist)](https://hazcomfast.com/blog/ghs-shipped-label-6-required-elements-checklist): Every GHS shipped-container label needs six required elements under 29 CFR 1910.1200(f)(1). Use this field-checkable checklist — plus a worked example and the mistakes that draw citations — to verify compliance fast. - [HazCom Citations Decoded: The Most-Cited 1910.1200 Subparts and the $16,550 Penalty Math](https://hazcomfast.com/blog/hazcom-citations-most-cited-1910-1200-penalties): Hazard Communication ranked second on OSHA's FY2025 list of most-cited standards. See which 1910.1200 subparts draw citations, how the $16,550 penalty math actually works, and how to close the gaps before an inspector does. - [Mixtures and the 2027-2028 HazCom Deadlines: A Transition Guide for Formulators and Employers](https://hazcomfast.com/blog/hazcom-mixtures-2027-2028-deadlines-transition): Mixtures get later HazCom 2024 deadlines than substances: manufacturers comply by November 19, 2027 and employers by May 19, 2028. Here is the full transition plan, worked example, and the myths that get companies cited. - [HCS 2024 Deadlines: The Complete Date-by-Date Compliance Calendar (Substances vs Mixtures)](https://hazcomfast.com/blog/hcs-2024-deadlines-complete-compliance-calendar): OSHA's HCS 2024 has four staggered deadlines split by substances vs mixtures and by manufacturer vs employer. Here is the exact date-by-date compliance calendar. - [Do You Have to Retrain Employees for HCS 2024? Your November 20, 2026 Training Obligation](https://hazcomfast.com/blog/hcs-2024-retraining-november-20-2026): HCS 2024 added new hazard classes and label elements, so employers must provide additional training on any newly identified hazards. Here is your November 20, 2026 date and exactly what to cover. - [Worker Acclimatization to Heat: OSHA's 7-14 Day Protocol & the 'First Day' Risk](https://hazcomfast.com/blog/heat-acclimatization-osha-7-14-day-protocol): New and returning workers face the highest heat-illness risk on day one. OSHA's guidance ramps them up over their first one to two weeks with the Rule of 20 percent. The schedule, the data behind it, and what the proposed rule would add. - [OSHA 300A Posting vs Electronic Submission: The Complete 2026 Recordkeeping Calendar](https://hazcomfast.com/blog/osha-300a-posting-vs-electronic-submission-2026): OSHA 300A posting and electronic ITA submission are two separate deadlines with different rules. Here is the full 2026 recordkeeping calendar and who does what. - [OSHA Electronic Recordkeeping (ITA): Who Must Submit 300/301/300A in 2026](https://hazcomfast.com/blog/osha-ita-electronic-recordkeeping-who-submits-2026): OSHA's ITA electronic submission is due March 2. Learn which establishments submit only the 300A and which must also submit the 300 and 301, including which construction NAICS actually owe all three. - [OSHA State Plans Explained: Full vs Public-Sector-Only vs Federal (2026 Map)](https://hazcomfast.com/blog/osha-state-plans-full-vs-public-sector-2026): There are 29 OSHA State Plans in 2026: 22 cover both private and public workers, 7 cover public-sector only. Learn what that means for compliance, penalties, and which rules apply. - [SDS Section by Section: All 16 Sections of a Safety Data Sheet (and the Ones OSHA Won't Enforce)](https://hazcomfast.com/blog/sds-16-sections-explained): A complete walkthrough of all 16 SDS sections under OSHA 1910.1200(g), which ones are mandatory, and the four (12-15) OSHA does not enforce. - [Trade Secrets on the SDS: What OSHA's HazCom CBI Rules Let You Withhold (1910.1200(i) + Appendix D)](https://hazcomfast.com/blog/sds-trade-secrets-cbi-rules-1910-1200i): OSHA's HazCom trade secret provisions at 29 CFR 1910.1200(i) let you withhold specific chemical identity on an SDS, but only under strict limits. This is what is allowed, and what never is. - [Shipped-Container vs Workplace Labels: The Two HazCom Label Systems You Must Not Confuse](https://hazcomfast.com/blog/shipped-vs-workplace-labels-hazcom): OSHA has two distinct HazCom label systems: shipped-container labels under 1910.1200(f)(1) and workplace labels under (f)(6). Learn the rules and avoid citations. - [Small Packages and Pull-Out Labels: HCS 2024's New Labeling Allowances for Tiny Containers](https://hazcomfast.com/blog/small-package-pull-out-labels-hcs-2024): HCS 2024 adds practical labeling options for small containers, including pull-out and fold-back labels. This is what is allowed, what still applies, and the deadlines. - [State HazCom Plans: The 29 OSHA-Approved Plans (and the Public-Sector-Only Trap)](https://hazcomfast.com/blog/state-hazcom-plans-29-states-public-sector): There are 29 OSHA-approved State Plans — 22 full plans (21 states plus Puerto Rico) and 7 public-sector-only plans. Learn which regulate private employers, where federal OSHA still applies, and why Washington's HazCom deadline has already passed while California has not adopted the 2024 rule at all. - [Cal/OSHA First Aid & CPR Requirements for Construction: California-Specific Guide](https://hazcomfast.com/blog/california-osha-first-aid-cpr-construction-requirements): California construction sites face stricter first aid rules than federal OSHA. Learn exactly what Cal/OSHA Title 8 §1512 requires, how it differs from federal 29 CFR 1926.50, the real 2026 penalty numbers, and what inspectors actually check. - [Hazardous Waste Disposal Requirements: OSHA & EPA Compliance Guide](https://hazcomfast.com/blog/hazardous-waste-disposal-osha-epa-requirements): Navigate OSHA and EPA hazardous waste disposal requirements. Covers RCRA, waste determination, labeling, storage limits, manifesting, and construction debris. Updated for 2026. - [OSHA Chemical Storage Requirements: Complete Compliance Guide](https://hazcomfast.com/blog/osha-chemical-storage-requirements-complete-guide): Complete guide to OSHA chemical storage requirements for 2026. Covers flammable cabinets, incompatible chemicals, secondary containment, ventilation, and signage. Avoid $16,550+ fines. - [OSHA Inspection Process: What to Expect & How to Prepare](https://hazcomfast.com/blog/osha-inspection-process-what-to-expect): Complete guide to the OSHA inspection process. Learn the 4 phases, your rights during inspections, how to prepare, and what happens after citations. Updated for 2026 penalty rates. - [OSHA Recordkeeping Requirements: 300 Log, 301, & 300A Complete Guide](https://hazcomfast.com/blog/osha-recordkeeping-requirements-300-log-guide): Master OSHA recordkeeping: Forms 300, 300A, 301. Learn what's recordable, posting deadlines, electronic submission rules, and exemptions. Updated for 2026. - [OSHA Scaffolding Requirements: Complete Safety & Compliance Guide](https://hazcomfast.com/blog/osha-scaffolding-requirements-complete-guide-2026): Master OSHA scaffolding requirements (29 CFR 1926.451-454). Covers supported scaffolds, suspended scaffolds, competent person duties, fall protection, and inspection rules. 2026 penalties included. - [HazCom vs GHS: What's the Difference? A Clear Explanation](https://hazcomfast.com/blog/hazcom-vs-ghs-key-differences-explained): HazCom vs GHS, settled: GHS is the UN's international framework; HazCom (29 CFR 1910.1200) is the enforceable US law that adopts it. What's the same, what's different, and what US employers must actually do. - [New Hire Safety Orientation: The Construction Checklist That Prevents Day-One Injuries](https://hazcomfast.com/blog/new-hire-safety-orientation-construction-checklist): New workers meet unfamiliar hazards on day one, and OSHA's rules put training before exposure. Build your orientation with this checklist covering HazCom, PPE, fall protection, and site-specific hazards. - [OSHA Recordkeeping 101: When Is an Injury Recordable?](https://hazcomfast.com/blog/osha-recordkeeping-when-is-injury-recordable): Not every workplace injury goes on the OSHA 300 log. Learn the recording criteria, first aid vs. recordable distinctions, and the 7-day rule that trips up most employers. - [Secondary Container Labeling: The Most Common OSHA Citation You Can Fix in 5 Minutes](https://hazcomfast.com/blog/secondary-container-labeling-osha-citation-fix): Unlabeled secondary containers are one of the top 5 HazCom citations every year. Learn exactly what OSHA requires, what qualifies as a secondary container, and the one exception that trips up most employers. - [OSHA Silica Compliance for Construction: The Complete Guide](https://hazcomfast.com/blog/osha-silica-compliance-construction-2026): OSHA estimates its silica rule will save 600+ lives and prevent 900+ silicosis cases a year. This guide covers Table 1 controls, exposure monitoring, medical surveillance, and the written exposure control plan every contractor needs in 2026. - [OSHA Forms 300, 300A & 301: The Complete Recordkeeping Guide for 2026](https://hazcomfast.com/blog/osha-forms-300-300a-301-recordkeeping-guide): Master OSHA injury and illness recordkeeping with this complete guide to Forms 300, 300A, and 301. Learn who must file, key deadlines, electronic submission rules, and how to avoid costly penalties. - [Root Cause Analysis for Construction: 5 Whys & Fishbone Diagrams](https://hazcomfast.com/blog/root-cause-analysis-5-whys-fishbone-construction): How to use 5 Whys and Fishbone (Ishikawa) diagrams to investigate construction incidents, prevent recurrence, and build OSHA defense documentation. - [Forklift Evaluations & Respirator Fit Tests: The Two-Clock OSHA Compliance Problem](https://hazcomfast.com/blog/forklift-respirator-fit-evaluations-osha): Forklift operator evaluations renew on a 3-year clock; respirator fit tests renew every 12 months. Here are both rules, the exact triggers, a side-by-side table, and how to never miss either deadline. - [30-Year Record Retention: OSHA 1910.1020 for Construction (Full Guide)](https://hazcomfast.com/blog/30-year-record-retention-osha-1910-1020): OSHA 1910.1020 requires exposure records for 30 years and medical records for employment + 30 years. See exactly what to keep, how long, the exceptions, and a worked retain-until example. - [Construction HazCom 1926.59: The Legal Standard](https://hazcomfast.com/blog/construction-hazcom-1926-59): OSHA's construction HazCom standard, 29 CFR 1926.59, adopts 1910.1200 by reference. What it requires, the November 20, 2026 deadline, multi-employer liability, and how to comply on a moving jobsite. - [OSHA HazCom for Contractors: The Essentials Guide](https://hazcomfast.com/blog/osha-hazcom-for-contractors): A targeted guide for contractors facing the 2026 HazCom updates. Focus on multi-employer liability, new labeling rules, and the Nov 20 compliance deadline. - [The November 20 Deadline: Your 2026 HazCom Compliance Audit](https://hazcomfast.com/blog/2026-hazcom-compliance-audit-november-20): November 20, 2026 is the OSHA date by which employers update, as necessary, HazCom labeling, programs, and training for newly identified hazards (GHS Revision 7). Use this construction-ready audit checklist — with the exact CFR cites — to verify you're compliant before an inspector arrives. - [5-Minute Compliance: The 2026 Toolbox Talk Schedule](https://hazcomfast.com/blog/5-minute-compliance-toolbox-talks-2026): A ready-to-use 12-month 2026 toolbox talk schedule mapped to the topics OSHA actually cares about — HCS 2024 labels, the Nov 20 deadline, silica, heat, and SDS access — with CFR cites and a sign-in template. - [The 60-Second OSHA Inspection Response Plan](https://hazcomfast.com/blog/60-second-osha-inspection-response-plan): When an OSHA CSHO knocks, the first 60 seconds set the trajectory of the entire inspection. Use this minute-zero Go-Team protocol — verify credentials, alert the team, escort to neutral ground — to stay in control. - [Automate RFI Requests for Subcontractor SDSs: Close the Compliance Gap](https://hazcomfast.com/blog/automate-rfi-request-sds-subcontractors): Chasing missing SDSs from subs by email costs time and leaves a multi-employer citation risk. How to automate the SDS request workflow, the OSHA duty behind it, and how to price your own manual process. - [Heat Illness Prevention Plan: What a Written HIIPP Must Include](https://hazcomfast.com/blog/beat-the-heat-heat-illness-prevention-plan): A written Heat Illness Prevention Plan is the document OSHA looks for on a hot-weather inspection. Here are the six elements every HIIPP needs, the 80°F/90°F proposed triggers, and how to build a jobsite-ready plan. - [HazCom Training Sign-In Log: What a Complete Record Shows](https://hazcomfast.com/blog/bulletproof-training-files-hazcom-sign-in): A dated HazCom training record is how you show an inspector the training happened. Learn the elements a sign-in log needs, why a list of signatures is not enough, and how to show training was effective. - [Container Size Matcher: Picking the Right GHS Label for Every Container](https://hazcomfast.com/blog/container-size-matcher-perfect-ghs-labels): Labeling a 55-gallon drum is nothing like labeling a 3 mL vial. Match GHS label size and layout to the container — and apply OSHA's real small-container rule, 29 CFR 1910.1200(f)(12), correctly. - [Find the Holes: How to Conduct an SDS Library Gap Audit](https://hazcomfast.com/blog/find-holes-sds-library-gap-analysis): A step-by-step SDS gap analysis: walk the jobsite, cross-reference your library, flag obsolete MSDSs and GHS Rev 3 vs Rev 7 documents, and close every hole before the November 20, 2026 HazCom deadline. - [GHS Revision 7 Converter: Every Hazard-Class Change in HCS 2024](https://hazcomfast.com/blog/ghs-revision-7-converter-hazard-classes): HCS 2024 moves US labels from GHS Rev 3 to primarily GHS Rev 7. This is the complete old-to-new crosswalk: two new physical-hazard classes, the Flammable Gas 1A/1B split, the Aerosols overhaul, and exactly what to relabel before November 20, 2026. - [How to Use a GHS Label Generator](https://hazcomfast.com/blog/how-to-use-ghs-label-generator-2026): A step-by-step workflow for using a digital GHS label generator to produce compliant, durable secondary-container and shipped labels — with the HCS 2024 / GHS Rev 7 data, durable-media specs, bilingual output, and the verification checks the software can't do for you. - [Instant Access: Implementing SDS QR Codes on Jobsites](https://hazcomfast.com/blog/instant-access-sds-qr-codes-jobsite): A field-tested playbook for SDS QR codes: where to post them, how to make stickers survive a jobsite, how to stay compliant offline, and how to roll it out in a day. - [Paper SDS Binders Are Costing You Thousands: The ROI Math](https://hazcomfast.com/blog/paper-binders-costing-thousands-sds-roi): In a worked example, paper SDS binders cost a 200-chemical, 3-site contractor about $3,800 in year one in labor and printing, before fine exposure. The line-item math, and how to run it for your own operation. - [Chemical Compatibility Matrix: Prevent Jobsite Reactions](https://hazcomfast.com/blog/prevent-chemical-reactions-compatibility-matrix): Don't store oxidizers with flammables. Use our segregation guide and compatibility matrix to prevent catastrophic chemical reactions on your jobsite. - [Print Compliant GHS Labels: GHS Rev 7 (HCS 2024) Standards](https://hazcomfast.com/blog/print-compliant-ghs-labels-rev7-rev8): Printing your own GHS labels for the jobsite? Here is exactly how to make them compliant and durable — GHS Revision 7 (HCS 2024) content, the red diamond color rule, BS 5609 materials, and the right printer/ink — with a worked example and a pre-print checklist. - [The True ROI of Safety: Calculating the Cost of Workplace Injuries](https://hazcomfast.com/blog/roi-of-safety-cost-workplace-injuries): Safety is often treated as a cost center. OSHA's Safety Pays math shows the opposite: direct vs. indirect costs, the 1.1–4.5x hidden multiplier, and how much you must sell to cover one injury. - [The $16,550 Mistake: Understanding HazCom Penalties in 2026](https://hazcomfast.com/blog/the-16550-mistake-hazcom-violations-2026): For 2026, OSHA civil penalty amounts are unchanged from 2025 — no inflation adjustment was made. Hazard Communication ranked second on OSHA's FY2025 list of most-cited standards. For a small contractor, the fines can threaten solvency. - [Ultimate Chemical Inventory: OSHA & Tier II Template](https://hazcomfast.com/blog/ultimate-chemical-inventory-template-osha-tier-ii): Streamline your 2026 Tier II reporting with a chemical inventory template that bridges OSHA HazCom and EPA EPCRA requirements. Download the essential fields. - [Write an OSHA HazCom Program in 10 Minutes: A Template](https://hazcomfast.com/blog/write-osha-hazcom-program-10-minutes): Don't start from scratch. Use this 10-minute guide to build a compliant written HazCom program covering labeling, SDS access, and training requirements. - [How to Prepare for an OSHA HazCom Inspection: Be Audit-Ready](https://hazcomfast.com/blog/how-to-prepare-for-osha-hazcom-inspection): Be audit-ready for OSHA HazCom (1910.1200) inspections. Serious citations up to $16,550; you have 15 working days to contest. Written program, SDS access, labels, proof of training. - [Are Digital SDS Legal? OSHA Rules for Electronic Access](https://hazcomfast.com/blog/are-digital-sds-legal-osha-rules): Yes—digital SDS are legal. OSHA's 1910.1200(g)(8) requires 'readily accessible' SDS, not paper. Learn the immediate-access test, the backup rule, and what fails an inspection. - [Why 'Cloud-Only' SDS Apps Fail on Construction Jobsites](https://hazcomfast.com/blog/cloud-only-sds-apps-fail-construction): Cloud-only SDS apps depend on cell signal, and construction sites are full of dead zones. Why signal-dependent access fails OSHA's 'readily accessible' rule (29 CFR 1910.1200(g)(8)), and how to evaluate a jobsite SDS system before you buy. - [OSHA Silica Table 1: Complete Task-by-Task Compliance Guide for Construction](https://hazcomfast.com/blog/osha-silica-table-1-control-plan-guide): Respirable crystalline silica kills construction workers. OSHA's Table 1 specifies control methods for 18 common tasks. Every entry with its respirator cells, plus the written plan, medical surveillance, and training the standard requires. - [Secondary Container Labels: OSHA Rules + On-Site Printing Workflow](https://hazcomfast.com/blog/secondary-container-labels-osha-rules): OSHA's secondary/workplace container labeling under 29 CFR 1910.1200(f): what every label must show, the immediate-use exception, the 2026 penalty, and a jobsite workflow. - [Complete Guide to OSHA HazCom Compliance](https://hazcomfast.com/blog/complete-guide-osha-hazcom-compliance-2026): The definitive construction HazCom 2026 guide: the Nov 20, 2026 employer deadline, GHS Rev 7 changes, the eight required pictograms, penalty caps, and a 90-day action plan — all verified against the CFR. - [How to Read a Safety Data Sheet (SDS): A Complete Guide](https://hazcomfast.com/blog/how-to-read-safety-data-sheet-sds-complete-guide): Safety Data Sheets contain critical chemical safety information, but they're often confusing. Learn how to quickly find the information you need in each of the 16 SDS sections, from hazard identification to disposal considerations. - [OSHA HazCom Standard: Key Updates & GHS Rev 7 Transition](https://hazcomfast.com/blog/osha-hazcom-2024-updates): The HCS 2024 requirements and GHS Revision 7 changes, explained. We break down what's changed and what it means for your workplace in 2026. - [GHS Pictograms Explained: What Each Symbol Means](https://hazcomfast.com/blog/ghs-pictograms-explained-what-each-symbol-means): OSHA requires eight GHS pictograms to communicate chemical hazards at a glance (a ninth, the environment pictogram, is not OSHA-required). Learn what each red-framed symbol means, when they're required, and how to use them for workplace safety training. - [OSHA Hot Work Permit & Fire Watch: What 1926.352 Really Requires](https://hazcomfast.com/blog/osha-hot-work-permit-fire-watch-1926-352): OSHA's construction hot-work rule (29 CFR 1926.352) mandates a fire watch and fire-prevention controls, but the familiar 35-foot clearance and 60-minute watch come from NFPA 51B, not the CFR. What the law requires, a permit filled in end to end, and the fire watch by the clock. - [How to Report a Fatality or Severe Injury to OSHA (8 & 24-Hour Rule)](https://hazcomfast.com/blog/osha-report-fatality-severe-injury-8-24-hour-procedure): Reporting a death or severe injury to OSHA is a separate, faster duty than recording it on the 300 log. These are the 8-hour and 24-hour clocks, the time windows, and exactly how to call it in. - [Temporary & Leased Workers: Who Records and Who Trains? (1904.31)](https://hazcomfast.com/blog/temporary-leased-workers-osha-recordkeeping-training-1904-31): On a construction site running temp and leased labor, one question causes most of the confusion: when a temp gets hurt, whose 300 log does it go on, and who owed them training? OSHA has clear answers. - [Asbestos in Construction: OSHA 1926.1101 PEL, Classes I-IV Work & Required Controls](https://hazcomfast.com/blog/asbestos-construction-1926-1101-pel-classes): OSHA's construction asbestos standard 29 CFR 1926.1101 sets a 0.1 f/cc PEL, a 1.0 f/cc excursion limit, and four classes of asbestos work, each with its own engineering controls, regulated-area rules, and worker protections. This is the full breakdown. - [Does OSHA Lockout/Tagout (1910.147) Apply to Construction? The Surprising Answer](https://hazcomfast.com/blog/does-osha-loto-1910-147-apply-to-construction): No. 29 CFR 1910.147 expressly excludes construction at 1910.147(a)(1)(ii). Construction hazardous-energy control instead runs on 1926.417, 1926.702(j), Subpart V, 1926.20/.21, and the General Duty Clause. This is how to build the right program. - [Is There an OSHA Heat Standard Yet? (2026 Status, Timeline & What Applies Now)](https://hazcomfast.com/blog/is-there-an-osha-heat-standard-2026-status): As of October 2026 there is no final federal OSHA heat standard. The proposed rule, date by date from the Federal Register, what it would require on a jobsite, and the duties that already apply. - [OSHA First Aid & CPR Requirements for Construction: Complete Guide](https://hazcomfast.com/blog/osha-first-aid-cpr-requirements-construction-complete-guide): 29 CFR 1926.50 requires trained first-aid personnel on site only when no hospital, clinic, infirmary, or physician is reasonably accessible in time and distance. See how that accessibility is judged, what certifications OSHA accepts, and what inspectors actually look for. - [OSHA Fire Safety Requirements: Complete Workplace Compliance Guide](https://hazcomfast.com/blog/osha-fire-safety-requirements-workplace-guide): Complete OSHA fire safety requirements for workplaces. Covers fire extinguishers, exit routes, emergency action plans, hot work permits, and fire prevention plans. 2026 penalty rates included. - [Emergency Action Plans for Construction: OSHA Requirements & Free Template](https://hazcomfast.com/blog/emergency-action-plan-osha-construction-guide): When does OSHA actually require an Emergency Action Plan on a jobsite, what six elements must it contain under 1926.35(b), and what's the ≤10-employee oral exception? The construction EAP guide, with a free builder. - [Lockout/Tagout (LOTO) Complete Guide: Energy Control for General Industry & Construction](https://hazcomfast.com/blog/lockout-tagout-loto-complete-guide-2026): A complete guide to lockout/tagout under 29 CFR 1910.147, and what carries over to construction, where 1926.417 applies instead. Covers 6 energy types, group LOTO, periodic inspections, and the citation traps. Includes a free LOTO Procedure Generator. - [Fall Protection in Construction: OSHA's #1 Cited Standard for 2026](https://hazcomfast.com/blog/fall-protection-construction-osha-guide-2026): Falls are the leading cause of death in construction, and 1926.501 tops OSHA's FY2025 list of most-cited standards. This guide covers the 6-foot trigger, the three systems, fall-clearance math, competent-person duties, and the citation traps that get contractors fined. - [OSHA Penalties for Construction (2026): Complete Fine Schedule & How to Avoid Citations](https://hazcomfast.com/blog/osha-penalties-2025-construction): Construction leads all industries in OSHA violations. See the full 2026 penalty schedule, understand how fines are calculated, learn which violations are most common, and get actionable steps to avoid costly citations. - [OSHA Construction Penalties in FY2025: $140.5 Million Proposed, $108.9 Million on the Books](https://hazcomfast.com/blog/osha-construction-penalties-proposed-vs-current-fy2025-data-analysis): Federal OSHA proposed $140.5 million in penalties to construction employers in FY2025. After informal settlements and contests, $108.9 million remains on record, 22.5% less. Half of the cases were cut, by a median 40%, and the other half weren't touched. Where you are, and what you were cited for, changes the odds. - [76% of OSHA's Construction Fall Protection Citations Hit Houses: The FY2025 Data on 1926.501(b)(13)](https://hazcomfast.com/blog/osha-fall-protection-citations-residential-roofing-data-analysis): OSHA's most-cited construction standard is, in practice, a residential roofing and framing rule. In FY2025, 5,142 of 6,778 federal fall protection citations in construction cited one paragraph, 1926.501(b)(13). Roofers took 56% of them, three in four came from planned inspections, and one in five was a repeat. - [HazCom on the Jobsite: What OSHA Actually Cited in FY2025 Construction Inspections](https://hazcomfast.com/blog/osha-hazcom-construction-citations-by-paragraph-fy2025-data-analysis): On a construction site, OSHA writes the general industry number: 698 HazCom citations under 1910.1200 in FY2025 against 14 under 1926.59, and 356 respirator citations under 1910.134 against none under 1926.103. The paragraph cited most wasn't a missing label. It was the written program. - [Workplace Chemical Exposure Limits: PELs, TLVs & RELs Explained](https://hazcomfast.com/blog/workplace-chemical-exposure-limits-pel-tlv-guide): Understand OSHA PELs, ACGIH TLVs, and NIOSH RELs. Complete guide to workplace chemical exposure limits with lookup tables, monitoring requirements, and compliance strategies. - [HazCom Program Updates You Need to Make Before November 20, 2026](https://hazcomfast.com/blog/hazcom-program-updates-march-2026): The November 20, 2026 HCS 2024 employer deadline is for SUBSTANCES — and a January 2026 final rule already moved every date. Here are the 7 updates every written HazCom program needs now, with the exact deadlines that apply to you. - [OSHA's PPE Fit Rule for Construction (2024 Final Rule, 1926.95): What Changed](https://hazcomfast.com/blog/osha-ppe-fit-rule-construction-2024-1926-95): OSHA's 2024 final rule amended 1926.95 to require construction PPE to properly fit each worker (effective Jan 13, 2025). What changed, who it protects, and how to comply. - [How to Contest an OSHA Citation: Step-by-Step Guide for Employers](https://hazcomfast.com/blog/how-to-contest-osha-citation-guide): Received an OSHA citation? You have 15 working days to contest. Your three options, how the Review Commission process runs after a notice of contest, the penalty reductions OSHA applies, and the defenses that hold up. - [PPE for Construction: Complete Guide to Personal Protective Equipment Requirements](https://hazcomfast.com/blog/personal-protective-equipment-ppe-construction-guide): What OSHA requires for PPE on a construction site, category by category: head, eye and face, hands, feet, hearing, respiratory and fall protection, with the rule behind each, who pays, and the 2025 fit requirement. - [OSHA Multi-Employer Worksite Doctrine: Who Gets the Citation?](https://hazcomfast.com/blog/osha-multi-employer-worksite-citation-doctrine): On a shared jobsite, OSHA can cite more than one employer for the same hazard. The four roles in CPL 02-00-124, the two-step test, all thirteen of OSHA's own examples, and what the courts have said. - [Subcontractor Safety Management: Multi-Employer HazCom Compliance](https://hazcomfast.com/blog/subcontractor-safety-management-multi-employer): How a general contractor manages subcontractor chemical safety on a shared jobsite: prequalification, chemical coordination, training checks, inspections and the record that answers OSHA's reasonable-care questions. - [Subcontractor HazCom: Managing Liability on Job Sites](https://hazcomfast.com/blog/subcontractor-hazcom-compliance): On a shared jobsite, every employer that brings chemicals owes the others three written exchanges under 1910.1200(e)(2), and the GC is usually the controlling employer under OSHA's multi-employer policy. How to run both. - [EPCRA Tier II Reporting for Construction: Do You Need to File?](https://hazcomfast.com/blog/epcra-tier-ii-reporting-construction-guide): If your jobsite holds 10,000 lb of a hazardous chemical, or the lower of 500 lb or the TPQ of an Extremely Hazardous Substance, at any one time, EPCRA section 312 requires an inventory report by March 1. The thresholds, the aggregation trap, Tier I vs Tier II, the exemptions and the per-day penalty. - [Your Crew Doesn't Have Email. Your Safety Software Demands It.](https://hazcomfast.com/blog/crew-without-email-shared-login-safety-software): OSHA never asks whether a worker has an inbox. Most safety platforms do. The workaround crews reach for, one shared login for the whole trailer, destroys the one thing the records were supposed to prove: who did what. - [What Happens to Your OSHA Records When You Cancel Your Safety Software?](https://hazcomfast.com/blog/osha-records-when-you-cancel-safety-software): Your 300 Log obligation runs five years past the calendar year it covers. A typical SaaS retention window runs 30 to 90 days past your last invoice. Nobody connects those two numbers until an inspector asks for a log that now lives in a closed account. - [The Job Ended. Who Can Still Ask for Your SDS?](https://hazcomfast.com/blog/who-can-ask-for-your-sds-after-a-job-ends): When a crew demobilizes, the instinct is to shut off access. OSHA's text runs the other way: a safety data sheet is an exposure record, and the people who can ask for it include the ones who no longer work for you. - [Offline SDS Access: Critical Compliance for Remote Sites](https://hazcomfast.com/blog/offline-sds-access-why-it-matters): Digital HazCom fails when connectivity drops. OSHA mandates 'immediate' access without barriers. Discover why offline backups are essential for compliance. - [Are Electronic Signatures Valid for OSHA Records? Yes, on One Condition](https://hazcomfast.com/blog/are-electronic-signatures-valid-for-osha-records): OSHA accepts electronic signatures on training certifications and the 300A — the interpretation letters say so. But the 2000 letter attaches a condition most safety software fails: every signature must be stored, every time. What the letters actually say, which records need no signature at all, and what makes a signature hold up when an attorney asks who held the tablet. - [How Long Do You Have to Keep Each OSHA Record? The Chart, With Citations](https://hazcomfast.com/blog/how-long-to-keep-osha-records-retention-chart): Five years for the 300 Log — counted from the end of the calendar year, not from the day you wrote it. Thirty years for the chemical inventory, not five. And for the training file everyone tells you to keep 'at least a year'? No federal duration exists. Every line below carries its citation, including the lines that say so. - [How Often Do Slings Need to Be Inspected? What OSHA Actually Requires](https://hazcomfast.com/blog/how-often-do-slings-need-to-be-inspected-osha): Each day before use by a competent person designated by the employer, in construction and general industry alike, every shift for all rigging on a construction site, and more often when conditions warrant. OSHA's sling rules in 29 CFR 1926.251 and 1910.184 also carry removal-from-service criteria with hard numbers, an identification tag requirement, and exactly one written record: the thorough inspection of alloy steel chain slings. - [Is a Scissor Lift an Aerial Lift? OSHA Says It's a Scaffold](https://hazcomfast.com/blog/is-a-scissor-lift-an-aerial-lift-osha): OSHA answered this in writing in 2000: a scissor lift is not an aerial lift. It is a mobile scaffold, covered by 29 CFR 1926.451 and 1926.452(w). That one classification decides whether your crew ties off, what training the operator needs, who inspects the machine and against which checklist. - [OSHA Hand and Power Tool Rules: What 1926 Subpart I Requires, Tool by Tool](https://hazcomfast.com/blog/osha-hand-and-power-tool-rules-1926-subpart-i): The five tool standards at the front of 29 CFR 1926 Subpart I, 1926.300 through .304, govern the most-used equipment on any jobsite. They decide which tools need constant-pressure switches, when a grinder guard is mandatory, who may fire a powder-actuated tool, and why your carpenter's personal saw is still your compliance problem. - [Who Can See Your OSHA 300 Log and Injury Records? Fewer People Than Your Software Thinks](https://hazcomfast.com/blog/who-can-see-osha-300-log-injury-records): A worker has a right to his own 301 — not his coworkers'. Six kinds of cases must not carry a name on the Log at all. And the respirator medical questionnaire says, in OSHA's own words, that your supervisor must not look at the answers. Who may see what, and how safety software quietly creates the violation it was bought to prevent. - [The Four-Business-Hour Rule: Producing Your OSHA 300 Logs During an Inspection](https://hazcomfast.com/blog/osha-300-log-inspection-four-business-hours): When an OSHA compliance officer asks for your injury and illness records, 29 CFR 1904.40 gives you four business hours to hand over copies. What they can ask for, how far back it reaches, who counts as an authorized government representative, and why late production is a citation of its own. - [Legal Hold & Record Locking: Protect Safety Records During Litigation](https://hazcomfast.com/blog/legal-hold-record-locking-construction-safety): How legal hold and record locking preserve OSHA safety records during citations and lawsuits — meeting 1910.1020 and 1904.33 retention duties and preventing spoliation sanctions. - [Equipment Lifecycle & Inspection Tracking for Construction Safety](https://hazcomfast.com/blog/equipment-lifecycle-inspection-tracking-construction): The complete guide to OSHA equipment inspection rules in construction — harnesses, forklifts, scaffolds, fire extinguishers, and cranes. Frequencies, records, retention, and how to never miss a date. - [60+ Free OSHA Compliance Tools: The Complete 2026 Toolkit](https://hazcomfast.com/blog/free-osha-compliance-tools-toolkit): A curated toolkit of more than sixty free OSHA compliance tools — fine calculators, GHS label makers, JHA builders, SDS gap analyzers, permit generators, recordkeeping helpers — organized by the job you're trying to do. No signup, no cost, built on the actual CFR. - [HazComFast vs KHA Online SDS: Construction Compliance Comparison 2026](https://hazcomfast.com/blog/hazcomfast-vs-kha-online-sds-comparison): Compare HazComFast and KHA Online SDS (now VelocityEHS) for OSHA HazCom compliance. Offline access, GHS labels, pricing, and construction-specific features compared, with the CFR cites and 2026 deadlines that matter. - [Near Miss Reporting, JHA & LOTO: Proactive Safety That Prevents Incidents](https://hazcomfast.com/blog/near-miss-jha-loto-proactive-safety-construction): How near miss reporting, Job Hazard Analysis, and Lockout/Tagout programs work together to prevent construction injuries before they happen. - [Digital Permits for Construction: Hot Work, Confined Space, Excavation & Scaffold](https://hazcomfast.com/blog/digital-permits-construction-hot-work-confined-space): Digital permit-to-work systems replace paper for hot work, confined space, excavation, and scaffold — closing the proof gap that gets contractors cited. What each permit must capture, the exact CFR that governs it, and how to build an audit trail OSHA accepts. - [How Much Does OSHA HazCom & SDS Software Cost? A 2026 Buyer's Guide](https://hazcomfast.com/blog/how-much-does-osha-hazcom-sds-software-cost): The honest answer to 'how much does HazCom software cost' is that the pricing model matters more than the sticker price — because a per-seat plan quietly punishes you for doing exactly what OSHA wants: giving every worker access. A buyer's guide to what drives the price, and how to compare it against the real cost of manual compliance. - [Read Proof: SDS Confirmation & Digital Signatures for OSHA Compliance](https://hazcomfast.com/blog/read-proof-sds-confirmation-signatures-osha): Prove your crew read every SDS: digital read-confirmations and e-signatures that satisfy OSHA HazCom training and access rules — and support a good-faith penalty reduction. - [Chemical Spill Response: A Step-by-Step Guide](https://hazcomfast.com/blog/chemical-spill-response-guide): Know exactly what to do when a chemical spill occurs. This guide covers assessment, containment, cleanup, and reporting procedures. - [PPE Selection Guide for Chemical Hazards](https://hazcomfast.com/blog/ppe-selection-guide-chemicals): Choose the right personal protective equipment for chemical handling. Covers gloves, respirators, eye protection, and protective clothing. - [HazComFast vs SafetyCulture (iAuditor): Construction HazCom Comparison 2026](https://hazcomfast.com/blog/hazcomfast-vs-safetyculture-comparison-2026): Compare HazComFast and SafetyCulture for OSHA HazCom compliance. See how offline SDS access, GHS label generation, chemical inventory, and construction-specific features compare — and which one actually maps to 29 CFR 1910.1200 / 1926.59. - [HazComFast vs SiteDocs: Which Is Better for Construction HazCom in 2026?](https://hazcomfast.com/blog/hazcomfast-vs-sitedocs-comparison-2026): A feature-by-feature, OSHA-grounded comparison of HazComFast and SiteDocs for construction HazCom in 2026: SDS, offline access, GHS labels, pricing, and what each tool is actually built for. - [Custom Safety Form Builder: Create Digital Inspection Forms for Construction](https://hazcomfast.com/blog/custom-form-builder-construction-safety): OSHA rarely dictates a form's layout — it requires documentation that proves compliance. How to build custom digital inspection forms, checklists, and incident reports that hold up as evidence, work offline, and retain for the required 5 years. - [Safety Dashboard & Audit Logs: Real-Time Visibility Across Every Jobsite](https://hazcomfast.com/blog/safety-dashboard-audit-logs-construction): How centralized safety dashboards and complete, timestamped audit logs give construction managers real-time compliance visibility and OSHA-ready documentation. - [Defense Package: Automated OSHA Citation & Litigation Evidence Export](https://hazcomfast.com/blog/defense-package-osha-citation-litigation-export): When OSHA cites you, you have 15 working days to respond. How to assemble a complete defense package — SDS logs, training records, permits, audit trails — and which evidence actually reduces the penalty. - [Mobile PWA for Construction Safety: Why Native-Like Apps Win on Jobsites](https://hazcomfast.com/blog/mobile-pwa-construction-safety-app): How a Progressive Web App puts the documents a crew needs at the point of work, on the phone they already carry, with no app store and no device management. - [Training Center: Complete HazCom Training Management for Construction](https://hazcomfast.com/blog/training-center-hazcom-construction-compliance): Manage chemical safety training, competency assessments, and certification tracking from one platform. Automate retraining triggers and maintain OSHA-ready records.