API (American Petroleum Institute)

The company that directly exposes workers to a hazard on a multi-employer worksite, such as a subcontractor whose crew creates a fall risk. Under Canadian OHS regulations, the exposing employer holds primary responsibility for controlling that hazard. Subcontractors must understand this designation, as it determines who is liable for corrective action.

A documented safety plan requiring subcontractors to manage worker exposure to extreme heat on jobsites. It typically covers hydration protocols, work-rest cycles, and heat acclimatisation schedules. Clients and prime contractors often require proof of a compliant program before mobilisation.

A site policy that prohibits any detectable level of drugs or alcohol in workers. Subcontractors must ensure all personnel pass pre-access and random testing. Violations typically result in immediate removal from site and contract penalties.

An emissions control device fitted to diesel-powered equipment that traps soot and particulate matter from exhaust. Subcontractors must ensure DPFs are maintained and operational to meet Tier 4 emissions requirements on regulated job sites. Failing inspections or bypassing filters can result in equipment being pulled from service.

Land managed by the federal government and leased for oil, gas, or resource extraction. Work on these lands requires additional permits, compliance steps, and federal oversight. Subcontractors must verify their employer holds valid federal authorisations before mobilising.

A regulated programme to remove and replace lead water pipes connecting mains to buildings. Subcontractors are often mobilised under municipal contracts to perform excavation, pipe removal, and restoration work. Compliance with environmental and safety regulations is mandatory throughout.

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