Standards Laboratory
Contact
In support of California’s ambient air monitoring program, the California Air Resources Board (CARB) operates and maintains a Standards Laboratory to provide authoritative standards for determining whether data meets established data quality objectives. The Standards Laboratory provides metrological certification and verification services for equipment used to perform required quality assurance activities, such as calibrations, checks, and audits. The equipment evaluated includes ozone transfer standards, flow‑measuring devices (such as orifices, mass flow meters, and mass flow controllers), and meteorological sensors (including wind speed, temperature, pressure, and relative humidity).
SOP Number | Standard Operating Procedure Title | Effective Date |
|---|---|---|
| 5720-4 | Standard Operating Procedure for Verification of Ozone Transfer Standards Using a Standard Reference Photometer | 01/2025 |
| 004-4 | Standard Operating Procedure for Verification of PM2.5 Working Standards | 08/22/2022 |
| 006-3 | Standard Operating Procedure for Verification of Temperature Devices | 02/2026 |
| 008-3 | Standard Operating Procedure for Verification of Anemometer Drives | 02/2026 |
| 002-2 | Standard Operating Procedure for Verification of High Flow Working Standards | 04/2026 |
| 007-2 | Standard Operating Procedure for Verification of Pressure Devices | 04/2026 |
| 005-2 | Standard Operating Procedure for Verification of Relative Humidity Devices | 02/2026 |
Additional Resources | Date |
|---|---|
| Technical Bulletin 1 - Ozone | 08/22/2022 |
| Technical Bulletin 2 - PM2.5 | 08/22/2022 |
| Calibration and Measurement Capabilities (CMC) | 09/12/2022 |
| Quality Assurance Bulletins | Various |
Standards Lab Contact (email) |
|---|
Monday through Thursday:
8:00am to 12:00pm & 1:00pm to 4:30pm
Shipping Address:
Attn: Standards Laboratory
CARB Monitoring Laboratory Division
1927 13th Street | Alley Entrance
Sacramento, CA 95811