7
National Ambient Air Quality Standards
l Older Version           2006/2008 Version
l
lOzone 0.08 ppm (8-hour) 0.075 ppm (8-hour)
l
l
lPM2.5  15 ug/m3 (annual) 15 ug/m3 (annual)
l 65 ug/m3 (daily) 35 ug/m3 (daily)
l
lLead 1.5 ug/m3  Between 0.10-0.30 ug/m3
l(Proposed) (quarterly)
l