Regulacje i polityka gospodarcza · 13.12.1996

Proposed Requirements for Designation of Reference and Equivalent Methods for PMINF2.5 and Ambient Air Quality Surveillance for Particulate Matter

The EPA proposes to revise 40 CFR part 58 to establish ambient air quality monitoring requirements for PM 2.5 (particles with an aerodynamic diameter less than or equal to a nominal 2.5 micrometers) as measured by a new reference method being proposed in Appendix L to 40 CFR part 50 or by an equivalent method designated in accordance with requirements being proposed in 40 CFR part 53. In addition, this document also proposes certain revisions to existing ambient air quality monitoring requirements for PM 10 (particles with an aerodynamic diameter less than or equal to a nominal 10 micrometers). The changes proposed in this document address among other things, network design and siting, quality assurance and quality control, and monitoring methodology. The document also indicates EPA's intent to explore opportunities to coordinate and integrate the existing visibility monitoring requirements with the ambient air quality monitoring requirements for particulate matter being proposed today to accommodate a better regional haze program and to reduce burdens and achieve multiple monitoring objectives.