02691cam a2200553 i 4500 on1078783751 OCoLC 20190831111942.0 m o d f cr mn||||||||| 181212e201804 ncuab obt f000 0 eng c GPO eng rda pn GPO MERUC OCLCF GPO MvI pcc n-us--- 0483-E-22 (online) EP 4.52:P 25/6/V.1-2 EPA-454/R-18-001a EPA-454/R-18-001b EP 4.52:P 25/6/V.1-2 Technical basis for the EPA's development of the significant impact thresholds for PM2.5 and ozone / Air Quality Assessment Division. Technical basis for the Environmental Protection Agency's development of the significant impact thresholds for Particulate Matter 2.5 and ozone Research Triangle Park, NC : U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Air Quality Assessment Division, April 2018. 1 online resource (2 volumes) : color illustrations, maps txt c rdamedia cr rdacarrier "April 2018." "EPA-454/R-18-001." Suffix in report number based on information from agency. CRDP Program record. Includes bibliographical references. [V.1. Without special title] -- [V.2 Appendices]. Description based on online resource; title from PDF title page (EPA, viewed Dec. 12, 2018). Air quality Standards United States. Air Pollution Standards United States. Air Pollution United States Measurement. Atmospheric ozone United States Measurement. Atmospheric ozone Environmental aspects United States. Air Pollution Measurement. fast (OCoLC)fst00802127 Air Pollution Standards. fast (OCoLC)fst00802166 Air quality Standards. fast (OCoLC)fst00802527 Atmospheric ozone Environmental aspects. fast (OCoLC)fst00820453 Atmospheric ozone Measurement. fast (OCoLC)fst00820459 United States. fast (OCoLC)fst01204155 United States. Environmental Protection Agency. Air Quality Assessment Division, issuing body. Print version: Technical basis for the EPA's development of the significant impact thresholds for PM2.5 and ozone (OCoLC)1076552095 https://purl.fdlp.gov/GPO/gpo112914 BEV Fed Docs 285814 285814