primary standard for particles generallyless than or equal to 10 mm in diameter(PM10), the EPA proposes to retain thecurrent 24-hour PM10 standard tocontinue to provide protection againsteffects associated with short-termexposure to thoracic coarse particles(i.e., PM10-2.5).
With regard to the
secondary PM standards, the EPAproposes to revise the suite of secondaryPM standards by adding a distinctstandard for PM2.5 to address PM-relatedvisibility impairment and to retain thecurrent standards generally to addressnon-visibility welfare effects.
• Fax: 202–566–9744.
The EPA’s policy is that all
comments received will be...
Allowed
Adobe Portable Document Format (.pdf) - application/pdf
R14-20,012214 PC# 31 Fed Reg -Exh A to IEPA's Statement of Reasons.pdf
Case Files 
