Published on: 98-29015. Notice of designation and receipt of applications. 98-29015. Ambient Air Monitoring Reference and Equivalent Methods: Designation of a New Reference Method and Receipt of Three New Applications for Reference Method Determinations
Published on: 97-18579. Final rule. 97-18579. Revised Requirements for Designation of Reference and Equivalent Methods for PMINF2.5/INF and Ambient Air Quality Surveillance for Particulate Matter