[Federal Register Volume 62, Number 250 (Wednesday, December 31, 1997)]
[Proposed Rules]
[Page 68246]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 97-33959]


=======================================================================
-----------------------------------------------------------------------

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Parts 52 and 81

[CO-001-0006b & CO-001-0021b; FRL-5934-3]


Clean Air Act Approval and Promulgation of PM10 
Implementation Plan for Colorado; Designation of Areas for Air Quality 
Planning Purposes; Steamboat Springs

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

-----------------------------------------------------------------------

SUMMARY: EPA proposes to approve the State implementation plan (SIP) 
submitted by the State of Colorado to achieve attainment and 
maintenance of the National Ambient Air Quality Standards (NAAQS) for 
particulate matter with an aerodynamic diameter less than or equal to a 
nominal 10 micrometers (PM10), including among other things, 
control measures, technical analyses, quantitative milestones and 
contingency measures. The SIP was submitted by the Governor of Colorado 
with a letter dated September 16, 1997 to satisfy certain Federal 
requirements for an approvable SIP for the Steamboat Springs, Colorado 
moderate PM10 nonattainment area, as designated effective 
January 20, 1994. In addition, EPA proposes to approve the Steamboat 
Springs emergency episode plan. EPA also proposes to amend the boundary 
for the Steamboat Springs nonattainment area to clarify the original 
description.
    In the Final Rules Section of this Federal Register, EPA is 
approving the State's SIP revisions as a direct final rule without 
prior proposal because the Agency views this as a noncontroversial 
revision and anticipates no adverse comments. A detailed rationale for 
EPA's actions is set forth in the direct final rule. If no adverse 
comments are received in response to this proposed rule, no further 
activity is contemplated and the direct final rule will become 
effective. If EPA receives adverse comments, the direct final rule will 
be withdrawn and all public comments received will be addressed in a 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 on this document should do so at this time.

DATES: Comments on this proposed rule must be received in writing by 
January 30, 1998.

ADDRESSES: Written comments on this action should be addressed to 
Richard R. Long, 8P2-A, at the EPA Regional Office listed below. Copies 
of the State's submittal and documents relevant to this proposed rule 
are available for inspection during normal business hours at the 
following locations: Air Program, Environmental Protection Agency, 
Region VIII, 999 18th Street, suite 500, Denver, Colorado 80202-2405; 
and Colorado Department of Health, Air Pollution Control Division, 4300 
Cherry Creek Drive South, Denver, Colorado 80222-1530.

FOR FURTHER INFORMATION CONTACT: Amy Platt, Air Program, EPA, Region 
VIII, at (303) 312-6449.

SUPPLEMENTARY INFORMATION: See the information provided in the Direct 
Final action which is located in the Rules Section of this Federal 
Register.

    Dated: November 4, 1997.
Jack W. McGraw,
Acting Regional Administrator.
[FR Doc. 97-33959 Filed 12-30-97; 8:45 am]
BILLING CODE 6560-50-P