40 CFR §61.125

1. (a)Each owner or operator of a source required to test emissions under § 61.123, unless an equivalent or alternate method has been approved by the Administrator, shall use the following test methods:
   1. (1)Method 1 of appendix A to 40 CFR part 60 shall be used to determine sample and velocity traverses;
   2. (2)Method 2 of appendix A to 40 CFR part 60 shall be used to determine velocity and volumetric flow rate;
   3. (3)Method 3 of appendix A to 40 CFR part 60 shall be used for gas analysis;
   4. (4)Method 5 of appendix A to 40 CFR part 60 shall be used to collect particulate matter containing the polonium-210; and
   5. (5)Method 111 of appendix B to 40 CFR part 61 shall be used to determine the polonium-210 emissions.