40 CFR Table C-4 to Subpart C of Part 53
Test Specifications for PM10, PM2.5 and PM10-2.5 Candidate Equivalent Methods
June 9, 2020
Open Table
| Specification | PM10 | PM2.5 | PM10-2.5 | |||
|---|---|---|---|---|---|---|
| Class I | Class II | Class III | Class II | Class III | ||
| Acceptable concentration range (Rj), µg/m3 | 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 | 31 | 31 | 31 | 31 |
| Number of reference method samplers per site | 3 | 3 | 31 | 31 | 31 | 31 |
| Minimum number of acceptable sample sets per site for PM10 methods: | ||||||
| Rj <60 µg/m3 | 3 | |||||
| Rj >60 µg/m3 | 3 | |||||
| Total | 10 | |||||
| Minimum number of acceptable sample sets per site for PM2.5 and PM10-2.5 candidate equivalent methods: | ||||||
| Rj <30 µg/m3 for 24-hr or Rj <20 µg/m3 for 48-hr samples | 3 | |||||
| Rj >30 µg/m3 for 24-hr or Rj >20 µg/m3 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 PM2.5 or PM10-2.5, maximum | 5 µg/m3 or 7% | 2 µg/m3 or 5% | 10%2 | 10%2 | 10%2 | 10%2 |
| Precision of PM2.5 or PM10-2.5 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/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 | ≥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 | |||
1Some missing daily measurement values may be permitted; see test procedure.
2Calculated as the root mean square over all measurement sets.
[72 FR 32203, June 12, 2007]
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