Update on Upcoming Proposed Revisions to the PM 2.5 and PM 10-2.5 Standards. Colleen McKaughan, EPA Region 9 December 14, 2005. Overview. History and schedule for PM standards PM 2.5 -- current std. and EPA recommendations
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Colleen McKaughan, EPA Region 9
December 14, 2005
25 - 30 ug/m3 and retain the annual std.
30 - 40 ug/m3 and strengthen annual std. to 12 - 14 ug/m3