40 CFR 61.125 - Test methods and procedures.
(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) Method 1 of appendix A to 40 CFR part 60 shall be used to determine sample and velocity traverses;
(2) Method 2 of appendix A to 40 CFR part 60 shall be used to determine velocity and volumetric flow rate;
(3) Method 3 of appendix A to 40 CFR part 60 shall be used for gas analysis;
(5) Method 111 of appendix B to 40 CFR part 61 shall be used to determine the polonium-210 emissions.