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

Link to an amendment published at 89 FR 16382, Mar. 6, 2024.

Pollutant	Reference or equivalent	Manual or automated	Applicable part 50 appendix	Applicable subparts of part 53						A	B	C	D	E	F	SO2	Reference	Manual	A-2									Automated	A-1	✓	✓						Equivalent	Manual	A-1	✓		✓						Automated	A-1	✓	✓	✓				CO	Reference	Automated	C	✓	✓						Equivalent	Manual	C	✓		✓						Automated	C	✓	✓	✓				O3	Reference	Automated	D	✓	✓						Equivalent	Manual	D	✓		✓						Automated	D	✓	✓	✓				NO2	Reference	Automated	F	✓	✓						Equivalent	Manual	F	✓		✓						Automated	F	✓	✓	✓				Pb	Reference	Manual	G								Equivalent	Manual	G	✓		✓						Automated	G	✓		✓				PM 10-Pb	Reference	Manual	Q								Equivalent	Manual	Q	✓		✓						Automated	Q	✓		✓				PM 10	Reference	Manual	J	✓			✓				Equivalent	Manual	J	✓		✓	✓					Automated	J	✓		✓	✓			PM 2.5	Reference	Manual	L	✓				✓			Equivalent Class I	Manual	L	✓		✓		✓			Equivalent Class II	Manual	L 1	✓		✓ 2		✓	✓ 1 2		Equivalent Class III	Automated	L 1	✓		✓		✓	✓ 1	PM 10-2.5	Reference	Manual	L, O	✓				✓			Equivalent Class I	Manual	L, O	✓		✓		✓			Equivalent Class II	Manual	L, O	✓		✓ 2		✓	✓ 1 2		Equivalent Class III	Automated	L 1, O 1	✓		✓		✓	✓ 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.

[75 FR 35597, June 22, 2010]