Terraphase has provided extensive environmental support services to an underground natural gas processing facility, covering air quality compliance, methane baseline recalculations, and reciprocating internal combustion engine (RICE) evaluations. This work addressed federal, state, and local regulatory requirements to ensure compliance and support operational excellence.

Scope of Services

Terraphase supported comprehensive air quality reporting and compliance activities, including the preparation and submission of greenhouse gas (GHG) emissions reports in accordance with California Air Resources Board (CARB) and U.S. Environmental Protection Agency (USEPA) requirements. Work included monthly GHG calculations, quality assurance, and coordination with third-party verifiers, as well as compliance with CARB’s Cap-and-Trade Program and Oil and Gas Rule through ambient monitoring, leak and detection repair, and methane data management. Terraphase recalculated methane baselines for multiple natural gas compressor stations by consolidating high frequency monitoring data, calculating statistical metrics, and updating compliance documentation.

The team also conducted annual RICE evaluations under the National Emission Standards for Hazardous Air Pollutants NESHAP standard (40 CFR 63 Subpart ZZZZ), reviewed site proximity to human occupancy, and updated supporting technical documents. Additional efforts included enhanced emissions reporting under California AB 617, regulatory analysis of USEPA’s 2024 Waste Emissions Charge (WEC) and updates to the GHG Reporting Program, evaluating potential impacts on client operations, and summarizing new compliance requirements.

Notable Accomplishments

• Submitted GHG reports to CARB and EPA with third-party verification
• Recalculated methane baselines for multiple compressor stations
• Analyzed regulatory impacts of EPA WEC and GHG rule changes