A 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.
Heat Index
Related Terms
Crystalline Silica Rule
ComplianceA regulatory standard requiring subcontractors to limit worker exposure to airborne silica dust on worksites. Common in drilling, sandblasting, and concrete cutting operations. Requires action plans, air monitoring, and respirator programmes for affected crews.
Dust Suppression
ComplianceThe process of controlling airborne particulates on worksites using water trucks, chemical agents, or barriers. Subcontractors may be contractually responsible for dust suppression on access roads, laydown yards, or excavation sites. Failure to comply can result in stop-work orders or back-charges from the prime contractor.
PPE (Personal Protective Equipment)
ComplianceProtective gear — such as hard hats, steel-toed boots, high-visibility vests, gloves, and eye protection — that subcontractors and their crews are required to wear on oil & gas and construction sites to meet site-specific safety standards and regulatory obligations. As a subcontractor, ensuring your workers arrive on-site with proper, compliant PPE is typically your responsibility and a condition of maintaining your contract.
FERC (Federal Energy Regulatory Commission)
ComplianceThe U.S. federal body that regulates interstate energy infrastructure, including pipelines and transmission lines. Projects requiring FERC approval often have strict compliance timelines that affect subcontractor scheduling and scope. Work on FERC-regulated assets may require additional permitting and documentation.
Hazmat-Permitted Storage
ComplianceDesignated facilities licenced to store hazardous materials such as fuel, chemicals, or drilling fluids under strict regulatory approval. Subcontractors must verify their storage sites hold valid permits before mobilising hazardous goods to a worksite. Non-compliance can trigger project shutdowns, fines, or loss of contract eligibility.
C3pao (cmmc Third-Party Assessment Organisation)
ComplianceAn accredited body that audits and certifies subcontractors under the U.S. Cybersecurity Maturity Model Certification programme. If you handle U.S. defence-related contracts, a C3PAO must verify your cybersecurity practices before you can bid. Without this certification, you may be disqualified from certain federal supply chain work.
Latest Compliance News
OSHA Extends Heat Emphasis Program Through 2031, Raising Inspection Risk for Outdoor Crews
OSHA has issued an updated National Emphasis Program on heat hazards that runs through 2031, with compliance officers authorized to conduct random inspections of high-risk industries on days when the heat index hits 80 degrees or more.
21 hours ago ComplianceFleet Safety Is a Business Strategy, Not Just an Insurance Problem
Construction Executive outlines why fleet safety programs, from driver screening to telematics, are a risk management and business development priority for contractors with vehicles on public roads and active jobsites.
yesterday ComplianceOSHA Enforcement Budget Faces 13.5% Cut in Trump's FY2027 Proposal, Inspections Could Drop 27%
The Trump administration's proposed FY2027 budget would slash OSHA's enforcement funding from $243 million to $210.3 million and reduce annual inspections by more than a quarter, with enforcement staff already at historic lows.
yesterday ComplianceOSHA's Revised Heat NEP Puts Outdoor Field Crews Directly in the Inspection Crosshairs
OSHA released an updated Heat National Emphasis Program on April 10, 2026, maintaining aggressive enforcement targets for outdoor worksites. Here's what oil and gas and heavy civil subcontractors need to know before inspectors show up.
2 days 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 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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