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Third-Party Verification Services

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Build Trust and Compliance with Accredited Third-Party Verification Services

As regulatory requirements and climate commitments expand, organizations must ensure their greenhouse gas (GHG) data and offset claims stand up to scrutiny. We are an accredited third-party verification body in California, Oregon, and Washington, providing expert verification services that enhance compliance while supporting operational flexibility. With accredited verifiers across all key sectors and a proven track record of successful verifications, we help clients demonstrate transparency, accuracy, and accountability in their reporting.
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Our Third-Party Verification Services

See how Trinity’s accredited verification services provide confidence and credibility for your GHG and offset reporting programs.

Trinity’s team of ARB-accredited verifiers is qualified across all four sector-specific accreditation types – General, Oil and Gas, Process, and Transaction – delivering full-scope verification for compliance and voluntary programs.

Our experts bring in-depth knowledge of GHG inventories and regulatory requirements, ensuring accurate verification of emission sources and transparent documentation of results.

We perform accredited offset verification services that validate carbon credit generation and trading activities, supporting both compliance programs and voluntary market initiatives.

Trinity partners with clients to align verification activities with regulatory timelines, reporting frameworks, and corporate sustainability objectives.

Backed by our Quality Management System, every verification project undergoes rigorous review to ensure accuracy, consistency, and superior technical quality.

With accredited verifiers based in California, Oregon, and Washington, Trinity provides cost-effective, responsive services with local expertise and regulatory insight.

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Third-Party Verification Services for your Industry's Unique Needs

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Data Centers
Real Estate Development
Higher Education
Federal, State & Provincial
Pharmaceutical Manufacturing
Mining
Oil & Gas
Chemicals Manufacturing

Third-Party Verification Services FAQ

Third-party verification is an independent review of greenhouse gas emissions data or carbon offsets to confirm accuracy and compliance with regulatory or voluntary program requirements. It ensures transparency, credibility, and confidence for regulators, investors, and stakeholders.

Trinity is an accredited verification body in California, Oregon, and Washington, with expertise in programs such as the California Air Resources Board (CARB) Mandatory Reporting Regulation, Low Carbon Fuel Standard, Oregon’s Clean Fuels Program, and Washington’s Cap-and-Invest Program.

Our accredited team performs both greenhouse gas (GHG) verifications and offset project verifications, serving clients across industrial, energy, oil and gas, and process sectors.

Each project is managed under Trinity’s Quality Management System, which uses proven protocols, in-house checklists, and peer review to ensure every verification meets the highest standards of accuracy and reliability.

With more than 60 verifications completed annually, accredited verifiers across all four sector types, and decades of expertise in air quality and climate programs, Trinity offers unmatched technical depth, responsiveness, and cost-effective solutions.

Explore Our Environmental Consulting Expertise

Our consultants provide local expertise across the globe. Reach out to us today for help with your Third-Party Verification Services needs.
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