A site where two or more employers operate simultaneously, such as an owner, general contractor, and subcontractors. Each party carries shared safety obligations under provincial OHS legislation. Subcontractors must understand their specific duties and how site control affects liability.
Multi-Employer Worksite
Related Terms
Greenhouse Gas Inventory
ComplianceA documented record of all GHG (Greenhouse Gas) emissions generated by your operations, including equipment, vehicles, and fuel use. Prime contractors increasingly require subcontractors to submit one for project bids. Accurate tracking helps avoid compliance penalties and supports contract eligibility.
Heat Index
ComplianceA measure combining air temperature and humidity to reflect how hot conditions actually feel to workers. Subcontractors use it to assess heat stress risk and trigger mandatory rest breaks or work stoppages. Most site safety plans reference heat index thresholds to stay compliant with occupational health regulations.
HSE (Health, Safety, and Environment)
ComplianceA framework governing safe work practices, environmental protection, and worker health on job sites. Subcontractors must meet client HSE standards to qualify for and maintain contracts. Non-compliance can result in work stoppages, site removal, or lost future opportunities.
CIH (Certified Industrial Hygienist)
ComplianceA credentialed professional who assesses and controls workplace health hazards such as chemical exposure, noise, and air quality. Subcontractors may be required to retain or consult a CIH to meet site entry or regulatory requirements. Their sign-off can be mandatory before work begins in confined spaces or hazardous environments.
Surface Impoundment
ComplianceA contained, lined pit or pond used to collect, store, or treat liquid waste on a work site. Subcontractors working near these structures must follow strict handling and access protocols. Improper interaction with surface impoundments can trigger environmental compliance violations and halt operations.
Ansi/isea 138
ComplianceThe American National Standard for hand protection selection criteria. It gives subcontractors a structured method to match the right gloves to specific job hazards. Clients and prime contractors increasingly require documented compliance with this standard on worksites.
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Safety+Health Magazine outlines the five core principles of Human and Organizational Performance, a safety philosophy that builds system resilience around the reality that human error is inevitable.
20 hours agoRelated Guides
OSHA Citations on Multi-Employer Worksites: What Subcontractors Need to Know
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.
Compliance GuideWhen a Jobsite Incident Happens: What Field Workers Need to Know Before Signing Anything
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.
Compliance GuideHow to Read and Negotiate an Oilfield Master Service Agreement (MSA): A Subcontractor's Guide
Learn which MSA clauses actually matter for oilfield subcontractors: indemnity, insurance, payment terms, and change orders. Know what you're signing.
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