1. Regulations
  2. title 40
  3. chapter I-i5
  4. part 53
  5. subpart A
  6. appendix

- Table A-1 to Subpart A of Part 53—Summary of Applicable Requirements for Reference and Equivalent Methods for Air Monitoring of Criteria Pollutants

Table A-1 to Subpart A of Part 53—Summary of Applicable Requirements for Reference and Equivalent Methods for Air Monitoring of Criteria Pollutants

Pollutant Reference or equivalent Manual or automated Applicable
appendix of part 50 of this
chapter 		Applicable subparts of this part A B C D E F SO2ReferenceManualA-2 AutomatedA-1✓✓ EquivalentManualA-1✓✓ AutomatedA-1✓✓✓ COReferenceAutomatedC✓✓ EquivalentManualC✓✓ AutomatedC✓✓✓ O3ReferenceAutomatedD✓✓ EquivalentManualD✓✓ AutomatedD✓✓✓ NO2ReferenceAutomatedF✓✓ EquivalentManualF✓✓ AutomatedF✓✓✓ PbReferenceManualG EquivalentManualG✓✓ AutomatedG✓✓ PM10-PbReferenceManualQ EquivalentManualQ✓✓ AutomatedQ✓✓ PM10ReferenceManualJ✓✓ EquivalentManualJ✓✓✓ AutomatedJ✓✓✓ PM2.5ReferenceManualL✓✓ Equivalent Class IManualL✓✓✓ Equivalent Class IIManualL 1✓2 ✓✓1 2 ✓ Equivalent Class IIIAutomatedL 1✓✓✓1 ✓ PM10-2.5ReferenceManualL, 2 O✓✓ Equivalent Class IManualL, 2 O✓✓✓ Equivalent Class IIManualL, 2 O✓2 ✓✓1,2 ✓ Equivalent Class IIIAutomated1 L, 1 2 O✓✓✓1 ✓

1 Some requirements may apply, based on the nature of each particular candidate method, as determined by the Administrator.

2 Alternative Class III requirements may be substituted.

[89 FR 16382, Mar. 6, 2024]

AUTHORITY: Sec. 301(a) of the Clean Air Act (42 U.S.C. sec. 1857g(a)), as amended by sec. 15(c)(2) of Pub. L. 91-604, 84 Stat. 1713, unless otherwise noted.

SOURCE: 40 FR 7049, Feb. 18, 1975, unless otherwise noted.