Table C-1 to Subpart C of Part 53—Test Concentration Ranges, Number of Measurements Required, and Maximum Discrepancy Specifications
| Pollutant | Concentration range, parts per million (ppm) | Simultaneous measurements required | Maximum discrepancy specification, parts per million | |||
|---|---|---|---|---|---|---|
| 1-hour | 24-hour | |||||
| First set | Second set | First set | Second set | |||
| Ozone | Low 0.06 to 0.10 | 5 | 6 | 0.02 | ||
| Med. 0.15 to 0.25 | 5 | 6 | 0.03 | |||
| High 0.35 to 0.46 | 4 | 6 | 0.04 | |||
| Total | 14 | 18 | ||||
| Carbon monoxide | Low 7 to 11 | 5 | 6 | 1.5 | ||
| Med. 20 to 30 | 5 | 6 | 2.0 | |||
| High 25 to 45 | 4 | 6 | 3.0 | |||
| Total | 14 | 18 | ||||
| Sulfur dioxide | Low 0.02 to 0.05 | 5 | 6 | 3 | 3 | 0.02 |
| Med. 0.10 to 0.15 | 5 | 6 | 2 | 3 | 0.03 | |
| High 0.30 to 0.50 | 4 | 6 | 2 | 2 | 0.04 | |
| Total | 14 | 18 | 7 | 8 | ||
| Nitrogen dioxide | Low 0.02 to 0.08 | 3 | 3 | 0.02 | ||
| Med. 0.10 to 0.20 | 2 | 2 | 0.02 | |||
| High 0.25 | 2 | 2 | 0.03 | |||
| Total | 7 | 8 |
[75 FR 35601, June 22, 2010]