8 CAR pt. 40, Appendix B. National Ambient Air Quality Standards List

ARKANSAS POLLUTION CONTROL AND ECOLOGY COMMISSION 8 CAR PART 40 APPENDIX B NATIONAL AMBIENT AIR QUALITY STANDARDS LIST APPENDIX B: NATIONAL AMBIENT AIR QUALITY STANDARDS LIST The National Ambient Air Quality Standards are listed in the table below. Pollutant Final Rule Cite Final Rule Date Primary / Secondar y Averaging Time Level Form Applicable Chapters Carbon Monoxide 76 FR 54294 August 31, 2011 Primary 8-hour 9 ppm Not to be exceeded more than once per year All Chapters 1-hour 35 ppm All Chapters Lead 73 FR 66964 November 12, 2008 Primary and secondary Rolling 3 month average 0.15 μg/m3 Not to be exceeded All Chapters Nitrogen Dioxide 75 FR 6474 February 9, 2010 Primary 1-hour 100 ppb 98th percentil e, averaged over 3 years All Chapters 61 FR 52852 October 8, 1996 Primary and secondary Annual 53 ppb Annual Mean All Chapters Ozone 73 FR 16436 March 27, 2008 Primary and secondary 8-hour 0.075 ppm Annual fourth- highest daily maximum 8-hr concentration, averaged over 3 years All Chapters Particle Pollution, PM2.5 78 FR 3085 January 15, 2013 Primary Annual 12 μg/m3 Annual mean, averaged over 3 years All Chapters 71 FR 61144 October 17, 2006 Secondary Annual 15 μg/m3 Primary and secondary 24-hour 35 μg/m3 98th percentile, averaged over 3 years All Chapters Pollutant Final Rule Cite Final Rule Date Primary / Secondar y Averaging Time Level Form Applicable Chapters Particle Pollution, PM10 71 FR 61144, October 17, 2006 Primary and secondary 24-hour 150 μg/m3 Not to be exceeded more than once per year on average over 3 years All Chapters Sulfur Dioxide 75 FR 35520 June 22, 2010 Primary 1-hour 75 ppb 99th percentile of 1-hour daily maximum concentrations, averaged over 3 years All Chapters 38 FR 25678 September 14, 1973 Secondary 3-hour 0.5 ppm Not to be exceeded more than once per year All Chapters