ARSD 74:36:02:03. Methods of sampling and analysis

Air pollutants of particulate matter, sulfur dioxide, carbon monoxide, ozone, nitrogen dioxide, and lead listed in 40 C.F.R. Part 50 (July 1, 2024) must be measured by the reference method or methods stated in 40 C.F.R. Part 50, Appendix A to Appendix U, inclusive (July 1, 2024), or an equivalent method designated in accordance with 40 C.F.R. Part 53 (July 1, 2024).