PM-2.5 definition

PM-2.5 means particulate matter with an aerodynamic diame- ter less than or equal to a nominal 2.5 micrometers as measured by a reference method based on 40 C.F.R. Part 50 Appendix L and designated in accordance with 40 C.F.R. Part 53 or by an equivalent method desig- nated in accordance with 40 C.F.R. Part 53.

PM-2.5 means particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 micrometers as measured by a reference method set forth in 40 CFR 50, Appendix L, and designated as a reference method in accordance with 40 CFR 53 or by an equivalent method approved by the Administrator in accordance with 40 CFR 53.

PM-2.5 means particulate matter with an aerodynamic diameter of less than or equal to a nominal 2.5 micrometers as measured by a reference method based on 40 CFR Part 50, Appendix L, and designated in accordance with 40 CFR Part 53, or by an equivalent method designated in accordance with 40 CFR Part 53.

Examples of PM-2.5 in a sentence

• Instead, EPA determined that states had to account for PM2.5 and PM10 condensables for applicability determinations and in establishing emissions limitations for PM2.5 and PM10 in PSD permits beginning on or after January 1, 2011.

• One of these requirements is for NSR permits to address pollutants responsible for the secondary formation of PM2.5, otherwise known as precursors.

• The 2008NSR Rule finalized several new requirements for SIPs to address sources that emit direct PM2.5 and other pollutants that contribute to secondary PM2.5 formation.

• In EPA’s April 28, 2011, proposed rulemaking for infrastructure SIPS for the 1997 ozone and PM2.5 NAAQS, we stated that each state’s PSD program must meet applicable requirements for evaluation of all regulated NSR pollutants in PSD permits ( see 76 FR 23757 at 23760).

• This view was reiterated in EPA’s August 2, 2012, proposed rulemaking for infrastructure SIPs for the 2006 PM2.5 NAAQS (see 77 FR 45992 at 45998).

More Definitions of PM-2.5

PM-2.5 means particulate matter with an aerodynamic diameter less than or equal to a nominal two and one-half (2.5) micrometers as measured by an applicable reference method, or equivalent or alternative method, specified by the EPA or by a method specified in this Article. {amended May 14, 2010, effective May 24, 2010}

PM-2.5 means particulate matter with an aerodynamic diameter less than or equal to a nominal two and one-half (2.5) micrometers as measured by an applicable reference method, or equivalent or alternative method, specified by EPA or by method specified in this Article.

PM-2.5 means particulate matter with an aerodynamic diameter less than or equal to a nominal

PM-2.5 means particulate matter with an aerody- namic diameter less than or equal to a nominal 2.5 microme- ters as measured by a reference method based on 40 C.F.R. Part 50 Appendix L and designated in accordance with 40C.F.R. Part 53 or by an equivalent method designated in accordance with 40 C.F.R. Part 53.

PM-2.5 means particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 micrometers as measured by a reference method based on 40 CFR 50 Appendix L, or by an equivalent method designated according to 40 CFR 53.

PM-2.5 means particulate matter that is 2.5 microns or less in diameter. “PM 10” shall mean particulate matter that is10 microns or less in diameter.

PM-2.5 means particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 micrometers as measured by an EPA‐approved reference or equivalent method.