40 C.F.R. § 53 app Table C-4 to Subpart C of Part 53
Current through May 31, 2024
| Specification | PM 10 | PM 2.5 | PM 10-2.5 | |||
| Class I | Class II | Class III | Class II | Class III | ||
| Acceptable concentration range (R j ), [MICRO]g/m3 | 5-300 | 3-200 | 3-200 | 3-200 | 3-200 | 3-200. |
| Minimum number of test sites | 2 | 1 | 2 | 4 | 2 | 4. |
| Minimum number of candidate method samplers or analyzers per site | 3 | 3 | 31 | 31 | 31 | 3.1 |
| Number of reference method samplers per site | 3 | 3 | 31 | 31 | 31 | 3.1 |
| Minimum number of acceptable sample sets per site for PM 10 methods: | ||||||
| R j < 20 [MICRO]g/m3 | 3 | |||||
| R j > 20 [MICRO]g/m3 | 3 | |||||
| Total | 10 | |||||
| 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. | 3 | 3 | 3 | 3 | 3. | |
| Rj > 15 [MICRO]g/m3 for 24-hr or R j > 8 [MICRO]g/m3 for 48-hr samples | 3 | 3 | 3 | 3 | 3. | |
| Each season | 10 | 23 | 23 | 23 | 23. | |
| Total, each site | 10 | 23 | 23 (46 for two-season sites) | 23 | 23 (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, maximum | 5 [MICRO]g/m3 or 7%. | 2 [MICRO]g/m3 or 5%. | 10%2 | 10%2 | 10%2 | 10%.2 |
| Precision of PM 2.5 or PM 10-2.5 candidate method, CP, each site | 10%2 | 15%2 | 15%2 | 15%.2 | ||
| Slope of regression relationship | 1 ±0.10 | 1 ±0.05 | 1 ±0.10 | 1 ±0.10 | 1 ±0.10 | 1 ±0.12. |
| Intercept of regression relationship, [MICRO]g/m3 | 0 ±5 | 0 ±1 | Between: 13.55-(15.05 * slope), but not less than-1.5; and 16.56-(15.05 * slope), but not more than +1.5 | Between: 15.05-(17.32 * slope), but not less than-2.0; and 15.05-(13.20 * slope), but not more than +2.0 | Between: 62.05-(70.5 * slope), but not less than-3.5; and 78.95-(70.5 * slope), but not more than +3.5 | Between: 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