FRM
Definition
A Federal Reference Method (FRM) is a method for sampling and analyzing ambient air to measure the concentration of a specific air pollutant. An FRM is either specified as a reference method in an applicable appendix to 40 CFR Part 50 or designated as a reference method by the U.S. Environmental Protection Agency (EPA) in accordance with 40 CFR Part 53. An FRM does not include a method for which the reference method designation has been canceled in accordance with 40 CFR 53.11 or 53.16.







