{"data":{"id":"us/40-cfr-61.125","jurisdiction":"us","citation":"40 CFR 61.125","heading":"Test methods and procedures.","body":"(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:\n(1) Method 1 of appendix A to 40 CFR part 60 shall be used to determine sample and velocity traverses;\n(2) Method 2 of appendix A to 40 CFR part 60 shall be used to determine velocity and volumetric flow rate;\n(3) Method 3 of appendix A to 40 CFR part 60 shall be used for gas analysis;\n(4) Method 5 of appendix A to 40 CFR part 60 shall be used to collect particulate matter containing the polonium-210; and\n(5) Method 111 of appendix B to 40 CFR part 61 shall be used to determine the polonium-210 emissions.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 61—NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS","Subpart K—National Emission Standards for Radionuclide Emissions From Elemental Phosphorus Plants"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"5863abd1eedcf8c22a82e3225c8823985f27750e50c18f6c8ada0efbb50e41ea","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-61.124","next":"us/40-cfr-61.126"},"notice":"GroundRules: Original legal text. Not legal advice."}