CARB-Accredited MRR Verifiers of GHG Emissions

This website is for CARB-accredited GHG verifiers for CARB's Mandatory Reporting Regulation. Please contact us at ghgverify@arb.ca.gov with questions. 

Recent Updates

Cal e-GRRT Step by Step Guide for Verifiers

MRR Regulation (PDF) (MS Word)
List of Reporting Entity Contacts and COI Status (updated 5/8/23)
CARB Verification Services Audit Checklist
Application for Upgrade to Lead Verifier or to add Sector

2020 Verifier Training

Errata (corrections to handouts, slides and video as of 11/9/20)

Course 1 (Verifier Training)
Course 1 recordings
1.1 slides | b/w
1.2 slides | b/w
1.3 slides | b/w
1.4 slides | b/w 
Handouts | (answers)

Course 2 (Transactions)    
Course 2 recordings
2.1 (Electric Power Entities) slides | b/w | 2.1.CS w/o answers | 2.1 Handout
2.2 (Transportation Fuel Suppliers) slides | b/w
2.3 (Natual Gas Suppliers) slides | b/w
2.4 (Carbon Dioxide Suppliers) slides | b/w
Course 2.2-2.4 handouts

Course 3 (Oil and Gas)
Course 3 recordings
3.1 (PNG Systems) slides | b/w
3.2 (Refineries) slides | b/w
3.3 (Hydrogen Production) slides | b/w
Case Studies

Course 4 (Process emissions training from 2015)

Webinars

Verifier Kickoff Webinar for 2022 data scheduled for February 7, 2023  color | b&w | recording
EPE Reporting Webinar March 8, 2022 color | b&w | recording
Verifier Kickoff Webinar February 2, 2022 color | b&w | recording
EPE Reporting Webinar 2021 (color) | Recording | Video for ONE Workbook
Verifier Kickoff Webinar 2021 color | b&w | recording
EPE Reporting Webinar 2020 color | recording
Verifier Webinar 2020; color | b&w | recording
EPE Reporting Webinar 2019 recording
Verifier Webinar 2019 color | b&w | recording
EPE Reporting Webinar 2018 color
Verifier Webinar 2018 color | b&w | recording
Verifier Webinar 2017 color | b&w | recording
EPE Verifier Webinar 2016 color | b&w | recording
Verifier Webinar 2016 color | b&w | recording
Reaccreditation Webinar 2015 color | b&w | recording

Guidance

Reporting guidance is posted on the guidance page.
Technical Guidance for Assuring Measurement Device Data Accuracy
Example Calculation for Verification of Reprocessed Tomato Product Data

Listserve Information
There are 2 CARB listserves related to GHG Mandatory Reporting:

  1. Public reporting & verification list (ghg-rep).  You may subscribe/unsubscribe yourself, including changing your email address.
  2. MRR accredited verifier-only list (ghgverifiers).  Please send ghgverify@arb.ca.gov an email if your email address changes.  Verifiers cannot update this list without CARB assistance.