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[Federal Register Volume 78, Number 182 (Thursday, September 19, 2013)]
[Proposed Rules]
[Page 57573]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2013-22735]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[EPA-R08-OAR-2012-0475; FRL-9901-05-Region 8]

Approval and Promulgation of Air Quality Implementation Plans; 
State of Colorado Second Ten-Year PM10 Maintenance Plan for 
Aspen

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

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SUMMARY: EPA is proposing approval of the State Implementation Plan 
(SIP) revisions submitted by the State of Colorado. On May 25, 2011, 
the Governor of Colorado's designee submitted to EPA a revised 
maintenance plan for the Aspen area for the National Ambient Air 
Quality Standards (NAAQS) for particulate matter with an aerodynamic 
diameter less than or equal to 10 microns (PM10), which was 
adopted by the State on December 16, 2010. As required by Clean Air Act 
(CAA) section 175A(b), this revised maintenance plan addresses 
maintenance of the PM10 standard for a second 10-year period 
beyond the area's original redesignation to attainment for the 
PM10 NAAQS. In addition, EPA is proposing approval of the 
revised maintenance plan's 2023 transportation conformity motor vehicle 
emissions budget for PM10. This action is being taken under 
sections 110 and 175A of the CAA.

DATES: Written comments must be received on or before October 21, 2013.

ADDRESSES: Submit your comments, identified by Docket number EPA-R08-
OAR-2012-0475, by one of the following methods:
    http://www.regulations.gov. Follow the on-line 
instructions for submitting comments.
     Email: ostigaard.crystal@epa.gov.
     Fax: (303) 312-6064 (please alert the individual listed in 
the FOR FURTHER INFORMATION CONTACT if you are faxing comments).
     Mail: Carl Daly, Director, Air Program, U.S. Environmental 
Protection Agency (EPA), Region 8, Mailcode 8P-AR, 1595 Wynkoop Street, 
Denver, Colorado 80202-1129.
     Hand Delivery: Carl Daly, Director, Air Program, U.S. 
Environmental Protection Agency (EPA), Region 8, Mailcode 8P-AR, 1595 
Wynkoop Street, Denver, Colorado 80202-1129. Such deliveries are only 
accepted Monday through Friday, 8:00 a.m. to 4:30 p.m., excluding 
Federal holidays. Special arrangements should be made for deliveries of 
boxed information.

Please see the direct final rule, which is located in the Rules section 
of this Federal Register for detailed instruction on how to submit 
comments.

FOR FURTHER INFORMATION CONTACT: Crystal Ostigaard, Air Program, U.S. 
Environmental Protection Agency, Region 8, Mailcode 8P-AR, 1595 Wynkoop 
Street, Denver, Colorado 80202-1129, (303) 312-6602, 
ostigaard.crystal@epa.gov.

SUPPLEMENTARY INFORMATION: In the Rules section of this Federal 
Register, EPA is approving the State's SIP revision through a direct 
final rule without prior proposal because the Agency views this as a 
noncontroversial SIP revision and anticipates no adverse comments. A 
detailed rationale for the approval is set forth in the preamble to the 
direct final rule. If EPA receives no adverse comments, EPA will not 
take further action on this proposed rule. If EPA receives adverse 
comments, EPA will withdraw the direct final rule and it will not take 
effect. Then, EPA will address all public comments in a subsequent 
final rule based on this proposed rule. EPA will not institute a second 
comment period on this action. Any parties interested in commenting 
must do so at this time. Please note that if EPA receives adverse 
comment on an amendment, paragraph, or section of this rule and if that 
provision may be severed from the remainder of the rule, EPA may adopt 
as final those provisions of the rule that are not the subject of an 
adverse comment. See the information provided in the Direct Final 
action of the same title which is located in the Rules section of this 
Federal Register.

    Authority:  42 U.S.C. 7401 et seq.

    Dated: August 28, 2013.
Shaun L. McGrath,
Regional Administrator, Region 8.
[FR Doc. 2013-22735 Filed 9-18-13; 8:45 am]
BILLING CODE 6560-50-P
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