Methods of measurement

Testing must be done in accordance with the provisions of chapter 33.1-15-12, as applicable. The reference methods in appendix A to chapter 33.1-15-12, its replacement or applicable alternative methods as approved by the department, shall be used to determine compliance with this chapter as follows: 1. Method 1 for selection of sampling site and sample traverses. 2. Method 2 for stack gas velocity and volumetric flow rate. 3. Method 3 for gas analysis. 4. Method 4 for moisture content. 5. Method 6, 6A, 6C, and 20, as applicable, for concentration of sulfur dioxide. The minimum sampling time shall be at least sixty minutes per run and a test must consist of three runs. For each run using method 6 for fuel burning equipment the emissions expressed in pounds per million British thermal units [nanogram per joule] shall be determined by the following procedures: E = CFd ( 20.9 ) or E = CFc ( 100 ) 20.9 - %O2 %CO2 where: (1) E = pollutant emission, lb/million Btu [ng/j]. (2) C = pollutant concentrations, lb/dscf [ng/dscm]. (3) %O2 = oxygen content by volume, dry basis. (4) %CO2 = carbon dioxide content by volume, dry basis. The percent oxygen and percent carbon dioxide shall be determined by using the integrated sampling and analysis procedures of method 3. (5) Fd and Fc = factors listed in method 19 of appendix A of chapter 33.1-15-12. For facilities firing combinations of fuels the Fd or Fc factors designated in this section shall be prorated in accordance with the applicable formula as follows: or where: xi = the fraction of total heat input derived from each type of fuel. (Fd)i or (Fc)i = the applicable Fd or Fc factor for each fuel type. n = the number of fuels being burned in combination.