United States
California - Irvine
Trinity Consultant's Southern California (Irvine) office assists local and nationwide clients in performing the following environmental services on an ongoing basis: emission inventories and reporting to various agencies, permitting, regulatory compliance support, periodic audits, EMS and EMIS implementation, GHG and climate change inventory and reporting, on-site staffing assistance, agency negotiations, NSR Title V and PSD and minor permitting strategies and applications, meteorological data evaluations and ambient dispersion modeling, Spill Prevention Control and Countermeasure Plans (SPCC), industrial wastewater permits, stormwater permits and plans, environmental due diligence assessment, Hazardous Material Business Plans, risk management (CalARP and EPA RMP), health risk assessment, and periodic reporting for various rule compliance.
Led by the Irvine office, Trinity is one of the most active and largest Verification Body with nine accredited verifiers (eight lead verifiers and one verifier) under California Air Resources Board (ARB), covering all applicable industry sectors. The Irvine office handles more than 40 GHG verification projects annually. In addition, the Irvine office has expertise in California Environmental Quality Act (CEQA) Initial Studies for industrial operations throughout California.
Local Leadership
California - Irvine
20 Corporate Park, Suite 285
Irvine, California 92606
- Phone:
- 949.567.9880
- TOLL-FREE:
- 888.555.2340
California - Irvine
Our Services Offered

Ambient Monitoring and Service Integration
Trinity's ambient air quality monitoring expertise ranges from the design and implementation of monitoring stations to routine operations, data validation, and official reporting to meet EPA and state requirements.
Air Quality Permitting
Trinity Consultants are experts in air permitting support for compliance with the Clean Air Act, offering comprehensive services from strategy, application development, and agency negotiations.
Emissions Calculations, Inventories, and Reporting
Trinity specializes in comprehensive emissions inventory and reporting for facilities, leveraging EPA and industry data to accurately identify and quantify emissions utilizing detailed reporting and advanced EHS digital solutions.
Health Risk Assessment
Trinity is the industry leader in air dispersion modeling studies, population exposure assessments, health risk characterizations, ambient monitoring and related air toxics work.
Spill Prevention, Control, and Countermeasure Plan (SPCC)
Trinity has the expertise to develop SPCC Plans across numerous industrial facilities and can assist with plan revisions and program audits.
Stormwater Pollution Prevention Plan (SWPPP)
Trinity is the leading industry regulatory expert in SWPPP stormwater runoff from industrial facilities and construction sites that can contaminate rivers, lakes, and coastal waters.
Waste Compliance Support
Trinity experts provide assistance and guidance to ensure adherence to regulations and standards regarding the handling, storage, treatment, and disposal of waste materials.Insights
Local News
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Sacramento Metro Area Attainment Designation for 2008 Ozone NAAQS
EPA ActionOn March 21, 2025, the Federal Register published the interim final decisions by EPA to stay and defer active and pending sanctions after the Sacramento Metro Federal Non-attainment Area (SFNA) was determined to be in attainment with the 2008 8-hour ozone NAAQS. This decision was based on area monitoring data from 2022-2024. The Area was designated Severe-15 for 2008 8-hour ozone NAAQs, indicating an ambient concentration of 0.113-0.119 ppm O3, on May 21, 2012, w...
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