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| Particulate Matter Less than 2.5 microns | CFR 40, Chapter I, Subchapter C, Part 50, App L. Equivalent Method |
| Carbon monoxide | CFR 40, Chapter I, Subchapter C, Part 50, Ap C. Automated Reference Method: RFCA-1093-093 |
| Ozone | CFR 40, Chapter I, Subchapter C, Part 50, Ap D. Automated Equivalent Method: EQOA-0992-087 |
| Nitrogen dioxide | CFR 40, Chapter I, Subchapter C, Part 50, App F. Automated Reference Method: RFNA-1194-099 |
| Sulfur dioxide | CFR 40, Chapter I, Subchapter C, Part 50, Ap A-1.
Automated Equivalent Method: EQSA- 0495-100 |
Environmental determination
Description: ASTM E1086 and ASTM E415 Method: ASTM E415, ASTM E1019
