40 CFR 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
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 2.5 | PM 10-2.5 | |||
---|---|---|---|---|---|---|
Class I | Class II | Class III | Class II | Class III | ||
Acceptable concentration range (Rj), µg/m 3 | 15-300 | 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 | 3 ^{1} | 3 ^{1} | 3 ^{1} | 3 ^{1} |
Number of reference method samplers per site | 3 | 3 | 3 ^{1} | 3 ^{1} | 3 ^{1} | 3 ^{1} |
Minimum number of acceptable sample sets per site for PM 10 methods: | ||||||
Rj <60 µg/m 3 | 3 | |||||
Rj >60 µg/m 3 | 3 | |||||
Total | 10 | |||||
Minimum number of acceptable sample sets per site for PM 2.5 and PM 10-2.5 candidate equivalent methods: | ||||||
Rj <30 µg/m 3 for 24-hr or Rj <20 µg/m 3 for 48-hr samples | 3 | |||||
Rj >30 µg/m 3 for 24-hr or Rj >20 µg/m 3 for 48-hr samples | 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, PRj or RPRj, respectively; RP for Class II or III PM 2.5 or PM 10-2.5, maximum | 5 µg/m 3 or 7% | 2 µg/m 3 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, µg/m 3 | 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 | ≥0.97 | ≥0.97 | ≥0.93 - for CCV ≤0.4; ≥0.85 0.2 × CCV - for 0.4 ≤CCV ≤0.5; ≥0.95 - for CCV ≥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.
[ 72 FR 32203, June 12, 2007]