Application for Reference and Equivalent Method Determination (Renewal)

To determine compliance with the NAAQS, State air monitoring agencies are required to use, in their air quality monitoring networks, air monitoring methods that have been formally designated by the EPA as either reference or equivalent methods under EPA regulations at 40 CFR part 53. A manufacturer or seller of an air monitoring method (e.g. an air monitoring sampler or analyzer) that seeks to obtain such EPA designation of one of its products must carry out prescribed tests of the method. The test results and other information must then be submitted to the EPA in the form of an application for a reference or equivalent method determination in accordance with 40 CFR part 53. The EPA uses this information, under the provisions of Part 53, to determine whether the particular method should be designated as either a reference or equivalent method. After a method is designated, the applicant must also maintain records of the names and mailing addresses of all ultimate purchasers of all analyzers or samplers sold as designated methods under the method designation. If the method designated is a method for fine particulate matter (PM2.5) and coarse particulate matter (PM10-2.5), the applicant must also submit a checklist signed by an ISO-certified auditor to indicate that the samplers or analyzers sold as part of the designated method are manufactured in an ISO 9001-registered facility. Also, an applicant must submit a minor application to seek approval for any proposed modifications to previously designated methods.

The latest form for Application for Reference and Equivalent Method Determination (Renewal) expires 2026-07-31 and is listed under ICR 202106-2080-002.