- 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 | PM | PM | Class I | Class II | Class III | Class II | Class III | Acceptable concentration range (R | 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 | R | 3 | R | 3 | Total | 10 | Minimum number of acceptable sample sets per site for PM | R | 3 | R | 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 | 5 µg/m 3 or 7% | 2 µg/m 3 or 5% | 10% 2 | 10% 2 | 10% 2 | 10% 2 | Precision of PM | 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 |
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1 Some missing daily measurement values may be permitted; see test procedure.
2 Calculated as the root mean square over all measurement sets.