40 C.F.R. § 53 app Table C-4 to Subpart C of Part 53

Current through September 30, 2024
Appendix Table C-4 to Subpart C of Part 53 - Test Specifications for PM [10], PM [2.5] and PM [10-2.5] Candidate Equivalent Methods

Specification PM 10 PM 2.5PM 10-2.5
Class IClass IIClass IIIClass IIClass III
Acceptable concentration range (R j ), [MICRO]g/m35-3003-2003-2003-2003-2003-200.
Minimum number of test sites212424.
Minimum number of candidate method samplers or analyzers per site333131313.1
Number of reference method samplers per site333131313.1
Minimum number of acceptable sample sets per site for PM 10 methods:
R j < 20 [MICRO]g/m33
R j > 20 [MICRO]g/m33
Total10
Minimum number of acceptable sample sets per site for PM 2.5 and PM 10-2.5 candidate equivalent methods:
R j < 15 [MICRO]g/m3 for 24-hr or R j < 8 [MICRO]g/m3 for 48-hr samples.33333.
Rj > 15 [MICRO]g/m3 for 24-hr or R j > 8 [MICRO]g/m3 for 48-hr samples33333.
Each season1023232323.
Total, each site102323 (46 for two-season sites)2323 (46 for two-season sites).
Precision of replicate reference method measurements, P Rj or RP Rj, respectively; RP for Class II or III PM 2.5 or PM 10-2.5, maximum5 [MICRO]g/m3 or 7%.2 [MICRO]g/m3 or 5%.10%210%210%210%.2
Precision of PM 2.5 or PM 10-2.5 candidate method, CP, each site10%215%215%215%.2
Slope of regression relationship1 ±0.101 ±0.051 ±0.101 ±0.101 ±0.101 ±0.12.
Intercept of regression relationship, [MICRO]g/m30 ±50 ±1Between: 13.55-(15.05 * slope), but not less than-1.5; and 16.56-(15.05 * slope), but not more than +1.5Between: 15.05-(17.32 * slope), but not less than-2.0; and 15.05-(13.20 * slope), but not more than +2.0Between: 62.05-(70.5 * slope), but not less than-3.5; and 78.95-(70.5 * slope), but not more than +3.5Between: 70.50-(82.93 * slope), but not less than-7.0; and 70.50-(61.16 * slope), but not more than +7.0.
Correlation of reference method and candidate method measurements[GREATER THAN EQUAL TO] 0.97[GREATER THAN EQUAL TO] 0.97[GREATER THAN EQUAL TO] 0.93-for CCV [LESS THAN EQUAL TO] 0.4; [GREATER THAN EQUAL TO] 0.85 + 0.2 * CCV-for 0.4 [LESS THAN EQUAL TO] CCV [LESS THAN EQUAL TO] 0.5; [GREATER THAN EQUAL TO] 0.95-for CCV [GREATER THAN EQUAL TO] 0.5

1 Some missing daily measurement values may be permitted; see test procedure.

2 Calculated as the root mean square over all measurement sets.

40 C.F.R. 53 app Table C-4 to Subpart C of Part 53

72 FR 32203, June 12, 2007
89 FR 16386, 5/6/2024