A system that controls airflow in enclosed underground worksites to remove hazardous gases, dust, and fumes. Subcontractors must verify ventilation meets regulatory standards before crews enter. Inadequate ventilation can trigger work stoppages and liability for prime contractors.
Tunnel Ventilation
Related Terms
Walking-Working Surfaces Standard
ComplianceA regulatory standard governing slip, trip, and fall hazards on job sites. Subcontractors must ensure floors, platforms, ladders, and elevated surfaces meet inspection and guarding requirements. Non-compliance can result in stop-work orders or liability exposure on client sites.
CCO (Certified Crane Operator)
ComplianceA crane operator who holds recognised certification confirming competency to safely operate lifting equipment on job sites. Most oil & gas and construction contracts require subcontractors to supply CCO-certified operators. Verify certification currency before mobilisation, as expired credentials can halt work and trigger compliance penalties.
ASME (American Society of Mechanical Engineers)
ComplianceA global standards organisation that sets codes for pressure vessels, piping, and mechanical equipment used on job sites. Subcontractors working on boilers, pressure systems, or lifting equipment often must meet ASME standards to qualify for contracts. Non-compliance can trigger failed inspections, work stoppages, or liability exposure.
Industrial Carbon Tax
ComplianceA federal levy charged to large industrial facilities based on their greenhouse gas emissions. As a subcontractor, your clients may pass these costs down through contract terms or fuel surcharges. Review your agreements closely to understand who bears this liability.
Hot Works
ComplianceAny task that produces open flame, sparks, or heat sufficient to ignite flammable materials. Common examples include welding, cutting, and grinding. Subcontractors typically require a Hot Works permit before starting, and site compliance checks are strict.
Personal Fall Arrest System
ComplianceA PFAS (Personal Fall Arrest System) is safety equipment that stops a worker from hitting the ground during a fall. It typically includes a full-body harness, lanyard, and anchor point. Subcontractors must ensure PFAS equipment is inspected, certified, and meets provincial and federal regulations before workers go at height.
Latest Compliance News
Skid Steer Injury Costs Ontario Paving Firm $70,000 Fine
An Ontario paving and landscaping company was fined $70,000 after a worker's foot was caught under a skid steer track in 2024. The employer had given no instructions on safe distance between foot workers and moving machines.
yesterdayComplianceWorkSafeBC Ratings Swing Premiums 69% to 163%, VRCA Forum Hears
At a VRCA forum, the Council of Construction Associations president said WorkSafeBC experience rating can cut premiums by up to 69% or add surcharges of up to 163%. Many owners and GCs also won't consider a bid without COR certification.
2 days agoCompliance28 Lawmakers Urge OSHA to Drop Respirator Medical Evaluation Rollback
Twenty-eight Democratic lawmakers asked OSHA to abandon a proposed rule that would end medical evaluations for some respirator users. The rule covers filtering facepiece respirators and loose-fitting PAPRs, and its final form is uncertain.
6 days agoComplianceRed Seal $5,000 Completion Bonus Portal Opens Nov. 16
Canadian journeypersons certified in a Red Seal trade on or after April 1, 2025 can apply for a $5,000 federal bonus starting Nov. 16, 2026. Here is what employers should prepare now.
9 days agoRelated Guides
When 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 GuideOSHA 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 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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