On a shared jobsite, OSHA's Multi-Employer Citation Policy (CPL 02-00-124) lets a compliance officer cite up to four employer roles — creating, exposing, correcting, and controlling — for the same condition, so "it was the sub's chemical" is not, by itself, a defense. These articles cover the four roles, controlling-employer reasonable care, and how HazCom duties are shared.

Temporary & Leased Workers: Who Records and Who Trains? (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.

The OSHA Citation Defense Package: What Evidence Wins a Contest
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.

OSHA Multi-Employer Worksite Doctrine: Who Gets the Citation?
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
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.

Construction HazCom 1926.59: The Legal Standard
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.

Subcontractor HazCom: Managing Liability on Job Sites
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.

Automate RFI Requests for Subcontractor SDSs: Close the Compliance Gap
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.