H2s (hydrogen Sulfide)

A fall-arrest assembly attached to a fixed ladder, typically including a rail or cable that a climber's harness connects to. Required on ladders exceeding specified heights at most oil and gas and construction sites. Subcontractors must verify worker training and compatible harness equipment before mobilising to sites with these systems.

A defined set of steps a subcontractor must complete to meet regulatory, safety, or client requirements before mobilising on a project. This may include certifications, insurance submissions, and safety orientations. Missing steps can delay onboarding or result in disqualification from a contract.

An unplanned release of a hazardous substance — liquid, gas, or solid — from piping, vessels, or equipment. For subcontractors, an LOC incident can trigger immediate work stoppages, site investigations, and liability exposure. Proper reporting and response procedures are typically required under your prime contractor agreement.

Gas produced by decomposing waste in landfills, primarily methane and carbon dioxide. Subcontractors working near landfill sites must account for LFG (Landfill Gas) detection and ventilation requirements. Exposure risks and monitoring obligations affect site safety planning and PPE requirements.

The full set of laws, standards, and oversight bodies governing work in a specific jurisdiction or sector. For subcontractors, it determines required certifications, permits, and reporting obligations. Knowing the local regime before mobilising helps avoid costly compliance gaps or work stoppages.

The U.S. Navy agency that manages construction, facilities, and infrastructure contracts on military installations. Subcontractors working NAVFAC projects must meet strict security, compliance, and documentation requirements. Expect rigorous vetting, access protocols, and federally mandated labour standards on all NAVFAC job sites.

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What to do after a jobsite injury or incident, what your rights are before signing incident reports, how workers' compensation works, and how to protect yourself on multi-employer worksites.

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Learn how OSHA's multi-employer citation policy works, why subcontractors get cited for hazards they didn't create, and how to protect your company on operator-controlled job sites.

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Learn which MSA clauses actually matter for oilfield subcontractors: indemnity, insurance, payment terms, and change orders. Know what you're signing.