Mandatory GHG Reporting - Verification Bodies
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The following verification bodies are accredited to perform verification services for greenhouse gas emissions data reports.
Executive Order | Verification Body | Contact Information | Accreditations* |
|---|---|---|---|
| H-23-025 Accredited in 2010 Valid through 4/28/26 | Apex Cos, LLC. 15850 Crabbs Branch Way, Suite 200 Rockville, MD 20855 | Trevor Donaghu 925-281-1760 trevor.donaghu@apexcos.com www.apexcos.com | # of Verifiers: 4 Transactions: 1 Oil and Gas: 1 Process: - |
| H-22-014 Accredited in 2010 Valid through 2/25/25 | Ashworth Leininger Group 601 East Daily Drive, Suite 302 Camarillo CA 93010 | Michael Waller 805-764-6003 mwaller@algcorp.com www.algcorp.com | # of Verifiers: 13 Transactions: 12 Oil and Gas: 12 Process: 3 |
| H-22-016 Accredited in 2010 Valid through 2/25/25 | Cameron-Cole, LLC 2236 Mariner Square Drive - Suite #500 Alameda CA 94501 | Mallory Andrews 510-777-1874 mandrews@cameron-cole.com www.cameron-cole.com | # of Verifiers: 6 Transactions: 3 Oil and Gas: 1 Process: 1 |
| H-22-015 Accredited in 2010 Valid through 2/25/25 | Carbon Verification Service, LLC 1178 Broadway, 3rd Floor #1123 New York, NY 10001 | James Groome 916-208-9389 jgroome@carbonverificationservice.com www.carbonverificationservice.com | # of Verifiers: 4 Transactions: 3 Oil and Gas: 1 Process: 1 |
| H-24-001 Accredited in 2021 Valid through 3/7/27) | Christianson, PLLP 302 5th Street SW Wilmar, MN 56201 | Kari Buttenhoff | # of Verifiers: 2 Transactions: 2 Oil and Gas: - Process: - |
| H-22-017 Accredited in 2010 Valid through 2/25/25 | Davenport Engineering, Inc. 23705 Crenshaw Blvd, Suite 101 Torrance CA 90505 | Ada Carson 310-787-4600 ada.carson@davenport-co.com www.davenport-co.com | # of Verifiers: 10 Transactions: 9 Oil and Gas: 8 Process: 1 |
| H-24-002 Accredited in 2020 Valid through 3/7/27 | Eco Engineers | Shashi Menon | # of Verifiers: 2 Transactions: 1 Oil and Gas: - Process: - |
| H-22-018 Accredited in 2011 Valid through 2/25/25 | Environmental Audit, Inc. 1000-A Ortega Way Placentia, CA 92870 | Debbie Bright Stevens 714-632-8521 x241 dstevens@envaudit.com www.envaudit.com | # of Verifiers: 2 Transactions: - Oil and Gas: 2 Process: 2 |
| H-24-106 Reaccredited in 2024 Valid through 4/9/27 | ERM Certification and Verification Services Limited Exchequer Court 33 St Mary Axe, London EC3A 8AA | Heather Moore 347-434-7277 heather.i.moore@erm.com www.ermcvs.com | # of Verifiers: 4 Transactions: 1 Oil and Gas: 2 Process: 1 |
| H-22-019 Accredited in 2009 Valid through 2/25/25 | First Environment, Inc. 2450 Venture Oaks Way, Ste 200 Sacramento CA 95833 | Jay Wintergreen 916-492-6080 jtw@firstenvironment.com www.firstenvironment.com | # of Verifiers: 3 Transactions: 2 Oil and Gas: 1 Process: 2 |
| H-22-020 Accredited in 2009 Valid through 2/25/25 | GHD Services, Inc. 5900 Hollis Street, Suite A Emeryville CA 94608 | Vel Subramanian 510-420-0700 svel@ghd.com https://www.ghd.com/en/ | # of Verifiers: 8 Transactions: 4 Oil and Gas: 7 Process: 2 |
| H-23-028 Accredited in 2023 Valid through 4/28/26 | Landau Associates, Inc. 155 NE 100th Street, Suite 302 Seattle, WA 98125 | Eric Albright | # of Verifiers: 5 Transactions: 1 Oil and Gas: - 2 Process: - |
| H-22-021 Accredited in 2009 Valid through 2/25/25 | Lincus, Inc. 222 East Huntinton Dr, Ste 110 Monrovia CA 91016 | Yeshpal Gupta 480-227-6761 ygupta@lincus.com www.lincusenergy.com | # of Verifiers: 6 Transactions: 3 Oil and Gas: 1 Process: - |
| H-22-023 Accredited in 2009 Valid through 2/25/25 | Lloyd's Register Quality Assurance, Inc/LRQA 1330 Enclave Parkway, Ste 200 Houston, TX 77077 | Tim Thorne 201-723-5478 sales-usa@lrqa.org www.lr.org | # of Verifiers: 2 Transactions: 1 Oil and Gas: 1 Process: - |
| H-22-022 Accredited in 2010 Valid through 2/25/25 | Locus Technologies 299 Fairchild Dr. Mountain View CA 94043 | John Wesley Hawthorne 415-799-9937 hawthornej@locustec.com www.locustec.com | # of Verifiers: 10 Transactions: 5 Oil and Gas: 6 Process: 2 |
| H-23-061 Accredited in 2009 Valid through 12/20/26 | Montrose Environmental Solutions, Inc. 1801 7th Street, Suite 100 Sacramento CA 95811 | Edward Krisnadi 714.919.6557 ekrisnadi@montrose-env.com www.montrose-env.com | # of Verifiers: 2 Transactions: - Oil and Gas: - 1 Process: - |
| H-22-024 Accredited in 2009 Valid through 2/25/25 | Ramboll Americas Engineering Solutions, Inc. 201 California Street, Suite 1200 San Francisco, CA 94111 (Offices also in Irvine) | Steven Branoff 415-796-1942 sbranoff@ramboll.com www.ramboll.com | # of Verifiers: 8 Transactions: 1 Oil and Gas: 5 Process: 4 |
| H-22-025 Accredited in 2010 Valid through 2/25/25 | Rincon Consultants, Inc. 180 North Ashwood Ave Ventura CA 93003 | Hannah Mize 916-706-1374 hmize@rinconconsultants.com www.rinconconsultants.com | # of Verifiers: 8 Transactions: 3 Oil and Gas: 7 Process: - |
| H-24-211 Accredited in 2009 Valid through 11/22/25 | SCS Engineers 3900 Kilroy Airport Way, Suite 100 Long Beach, CA 90806 | Ray Huff 562-426-9544 rhuff@scsengineers.com www.scsengineers.com | # of Verifiers: 6 Transactions: 1 Oil and Gas: 1 Process: 1 |
| H-24-004 Accredited in 2018 Valid through 3/7/27 | SCS Global Services 2000 Powell Street, Suite 600 Emeryville CA 94608 | Christie Pollet-Young 510-993-0124 cpollet-young@scsglobalservices.com www.scsglobalservices.com | # of Verifiers: 6 Transactions: 1 Oil and Gas: 2 Process: 1 |
| H-22-027 Accredited in 2010 Valid through 2/25/25 | Tetra Tech, Inc. and Subsidiaries 3475 E. Foothill Blvd. Pasadena CA 91107 | Eddy Huang 626-470-2417 eddy.huang@tetratech.com www.tetratech.com | # of Verifiers: 10 Transactions: 3 Oil and Gas: 5 Process: 2 |
| H-21-149 Accredited in 2018 | Tierra Resource Consultants, LLC 1501 North Broadway, Suite 300 Walnut Creek CA 94596 | Mike Yim 408-209-3296 Mike.Yim@tierrarc.com http://tierrarc.com | # of Verifiers: 2 Transactions: - Oil and Gas: - Process: - |
| H-23-027 Accredited in 2009 Valid through 4/28/2026 | Trinity Consultants, Inc. 20 Corporate Park, Suite 285 Irvine CA 92606 | Charles C. Lee 949-567-9880 x5502 clee@trinityconsultants.com www.trinityconsultants.com/services | # of Verifiers: 13 Transactions: 8 Oil and Gas: 8 Process: 6 |
| H-24-107 Accredited in 2024 Valid through 4/9/2027 | Turner, Mason & Company P.O. Box 130808 Dallas, Texas 75313 | Cinda Lohmann 972-918-5021 cindalohmann@turnermason.com https:l//www.turnermason.com | # of Verifiers: 3 Transactions: - Oil and Gas: 2 Process: - |
| H-24-003 Accredited in 2015 Valid through 3/7/27 | TÜV-SÜD America, Inc. - Ruby Canyon (pending) 743 Horizon Ct., Suite 385 Grand Junction, CO 81506 | Zach Eyler 970-241-9298 x15 zach.eyler@tuvsud.com www.tuvsud.com | # of Verifiers: 9 Transactions: 2 Oil and Gas: 3 Process: - |
| H-24-005 Accredited in 2021 Valid through 3/7/27 | Weaver and Tidwell, L.L.P. 24 Greenway Plaza, Suite 1800 Houston, TX 77046 | Wade Watson 832-320-3263 wade.watson@weaver.com www.weaver.com | # of Verifiers: 6 Transactions: 1 Oil and Gas: 6 Process: 1 |
| H-22-030 Accredited in 2010 Valid through 2/25/25 | WZI Inc. 1717 28th Street Bakersfield CA 93309 | Richard Wilson 661-326-1112 rwilson@wziinc.com www.wziinc.com | # of Verifiers: 3 Transactions: 3 Oil and Gas: 3 Process: 2 |
| H-22-031 Accredited in 2016 Valid through 2/25/25 | Yorke Engineering, LLC 31726 Rancho Viejo Rd., Ste. 218 San Juan Capistrano CA 92675 | Carla Jo Prasetyo 949-248-8490 cjo@yorkeengr.com www.yorkeEngr.com | # of Verifiers: 11 Transactions: 6 Oil and Gas: 3 Process: 1 |
List of formerly accredited verification bodies
*Accreditations
Transactions specialist (Transactions) means a verifier accredited to meet the requirements of section 95131(a)(2) for providing verification services to electric power entities; suppliers of petroleum products and biofuels; suppliers of natural gas, natural gas liquids, and liquefied petroleum gas; and suppliers of carbon dioxide.
Oil and gas systems specialist (Oil and Gas) means a verifier accredited to meet the requirements of section 95131(a)(2) for providing verification services to operators of petroleum refineries, hydrogen production units or facilities, and petroleum and natural gas systems listed in section 95101(e).
Process emissions specialist (Process) means a verifier accredited to meet the requirements of section 95131(a)(2) for providing verification services to operators of facilities engaged in cement production, glass production, lime manufacturing, pulp and paper manufacturing if process emissions are included in the scope of operations, iron and steel production, and nitric acid production.
For questions regarding verification, contact ghgverify@arb.ca.gov.