Cal. Code Regs. tit. 17 § 70100.1

Current through Register 2024 Notice Reg. No. 50, December 13, 2024

Section 70100.1 - Methods, Samplers, and Instruments for Measuring Pollutants

(a) PM10 Methods. The method for determining compliance with the PM10 ambient air quality standard 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). California Approved Samplers for PM10 are set forth in "Air Monitoring Quality Assurance Manual Volume IV, Part A: Monitoring Methods for PM10," adopted March 10, 2006, 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. 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 Method.

(b) PM2.5 Methods. The method for determining compliance with the PM2.5 ambient air quality standard shall be the Federal Reference Method for the Determination of Particulate Matter as PM2.5 in the Atmosphere, 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 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 PM2.5 are set forth in "Air Monitoring Quality Assurance Manual Volume IV, Part B: Monitoring Methods for PM2.5," adopted March 10, 2006, 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 PM2.5 shall also be California Approved Samplers for 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 Method.

(c) Ozone Methods. The method for determining compliance with the ozone ambient air quality standard shall be the Federal Equivalent Method for the Determination of Ozone in the Atmosphere ( 40 CFR, part 53). California Approved Samplers for ozone are set forth in "Air Monitoring Quality Assurance Manual Volume IV, Part C: Monitoring Methods for Ozone", as adopted March 10, 2006. Samplers, methods, or instruments determined in writing by the Air Resources Board or the Executive Officer to produce equivalent results for ozone shall also be California Approved Samplers for ozone.

(d) NO₂ Methods. The method for determining compliance with the NO₂ ambient air quality standard shall be the chemiluminescence Federal Reference Method for the determination of NO₂ in the atmosphere ( 40 CFR, Part 50 , Appendix F -- Measurement, as published in 41 Fed.Reg. 52688, Dec. 1, 1976, as amended at 48 Fed.Reg. 2529, Jan. 20, 1983). California Approved Samplers for NO₂ are set forth in the Air Monitoring Quality Assurance Manual, Volume IV, Part D: Monitoring Methods for NO₂ as adopted on February 22, 2007, 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 NO₂ shall also be California Approved Samplers for NO₂.

Cal. Code Regs. Tit. 17, § 70100.1

1. New section filed 6-5-2003; operative 7-5-2003 (Register 2003, No. 23).
2. Amendment filed 4-17-2006; operative 5-17-2006 (Register 2006, No. 16).
3. New subsection (d) filed 2-19-2008; operative 3-20-2008 (Register 2008, No. 8).

Note: Authority cited: Sections 39600, 39601 and 39606, Health and Safety Code. Reference: Sections 39014, 39606, 39701 and 39703(f), Health and Safety Code.