California Air Resources Board

Air Monitoring Quality Assurance Manual

Appendix A to Title 17 (Section 70100.1) provides the definition of pollutant and monitoring methods for the pollutants.  The method for determining compliance with the State PM10 and PM2.5 ambient air quality standards shall be the Federal Reference Method for the Determination of Particulate Matter as PM10 in the Atmosphere (40 CFR, Chapter 1, part 50, Appendix M, as published in 62 Fed. Reg., 38753, July 18, 1997) and as PM2.5 (40 CFR, Chapter 1, part 50, Appendix L, as published in 62 Fed. Reg., 38714, July 18, 1997 and as amended in 64 Fed. Reg., 19717, April 22, 1999). The PM2.5 samplers listed in the Federal Reference Method must use either the WINS impactor or the U.S. EPA-approved very sharp cut cyclone (67 Fed. Reg., 15566, April 2, 2002) to separate PM2.5 from PM10.

California Approved Samplers for PM10 and PM2.5 are set forth in "Air Monitoring Quality Assurance (QA) Manual Volume IV, Part A (Monitoring Methods for PM10) and Part B (Monitoring Methods for PM2.5), which is incorporated by reference herein.  Samplers, methods, or instruments determined in writing by the Air Resources Board or the Executive Officer to produce equivalent results for PM10 shall also be California Approved Samplers for PM10 and PM2.5. These include those continuous samplers that have been demonstrated to the satisfaction of the Air Resources Board to produce measurements equivalent to the Federal Reference Methods. Technical support documents are available upon request. 

California Approved Samplers for Particulate Matter

Part A - List of PM10 Samplers and Monitors (CAS for PM10)

Part B - List of PM2.5 Samplers and Monitors (CAS for PM2.5)