40 CFR Table C-1 to Subpart C of Part 53
Test Concentration Ranges, Number of Measurements Required, and Maximum Discrepancy Specifications
June 9, 2020
CFR
Open Table
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]


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