TLV (Threshold Limit Value)

A work-related injury or illness that must be logged on an OSHA 300 form. This includes incidents requiring medical treatment beyond first aid, restricted work, or lost time. High recordable rates can disqualify subcontractors from bidding on major operator contracts.

A risk-based inspection standard used on oil and gas facilities to prioritise equipment checks by failure likelihood and consequence. Subcontractors may need to align their inspection scopes and documentation to meet API 580 requirements on client sites.

Legally required costs to decommission and remediate a site at end of life, such as plugging wells or removing infrastructure. Operators budget ARO years in advance, which can create late-project work opportunities for subcontractors. Understand how ARO timelines affect contract scope, since decommissioning work often has strict regulatory deadlines.

The process of restoring a work site to its original or agreed-upon condition after project completion. Subcontractors are often scoped for reclamation work including grading, revegetation, and soil remediation. Reclamation scopes are regulated and must meet provincial closure criteria before sign-off.

An inspection code governing the maintenance and repair of in-service pressure vessels. Subcontractors performing vessel work must often comply with API 510 requirements and use certified inspectors. Non-compliance can result in work stoppages or contract disqualification.

An accidental hit on a buried utility line — gas, electrical, or telecom — during excavation or drilling. Subcontractors face immediate work stoppages, liability exposure, and potential regulatory penalties. Always confirm locate tickets are current before ground disturbance.

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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.