CSR 45-11-4. Methods of Measurement

§45-11-4. Methods of Measurement. 4.1. PM10 concentrations shall be measured in the ambient air as particulate matter with an aerodynamic diameter less than or equal to 10 micrometers by: 4.1.a. Reference method based on Appendix J of 40 CFR 50, or 4.1.b. An equivalent method designated in accordance with 40 CFR 53. 4.2. Sulfur dioxide concentrations shall be measured in ambient air as sulfur dioxide by: 4.2.a. Reference method based on Appendix A of 40 CFR 50, or 4.2.b. An equivalent method designated in accordance with 40 CFR 53. 4.3. Carbon monoxide concentrations shall be measured in ambient air as carbon monoxide by: 4.3.a. Reference method based on Appendix C of 40 CFR 50, or 4.3.b. An equivalent method designated in accordance with 40 CFR 53. 4.4. Nitrogen dioxide concentrations shall be measured in ambient air as nitrogen dioxide by: 4.4.a. Reference method based on Appendix F of 40 CFR 50, or 4.4.b. An equivalent method designated in accordance with 40 CFR 53. 4.5. Ozone concentrations shall be measured in the ambient air as ozone by: 4.5.a. Reference method based on Appendix D of 40 CFR 50, or 4.5.b. An equivalent method designated in accordance with 40 CFR 53.