National Ambient Air Quality Standards for Particulate Matter

Federal Register, Volume 77 Issue 126 (Friday, June 29, 2012)

Federal Register Volume 77, Number 126 (Friday, June 29, 2012)

Proposed Rules

Pages 38889-39055

From the Federal Register Online via the Government Printing Office www.gpo.gov

FR Doc No: 2012-15017

Page 38889

Vol. 77

Friday,

No. 126

June 29, 2012

Part II

Environmental Protection Agency

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40 CFR Parts 50, 51, 52, et al.

National Ambient Air Quality Standards for Particulate Matter; Proposed Rule

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