Clean Air Act Approval and Promulgation of State Implementation Plan for Montana; Libby Moderate PMINF10 Nonattainment Area

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[MT26-7-6874b; FRL-5609-9]

Clean Air Act Approval and Promulgation of State Implementation

Plan for Montana; Libby Moderate PM10 Nonattainment Area

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

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

SUMMARY: EPA proposes to approve the State implementation plan (SIP)

revisions submitted by the State of Montana on March 15, 1995 to

satisfy the Federal Clean Air Act requirement to submit contingency

measures for the Libby moderate PM10 (particulate matter with an

aerodynamic diameter less than or equal to a nominal 10 micrometers)

nonattainment area. The March 15, 1995 submittal also recodified the

Lincoln County regulations. In addition, EPA proposes to approve a SIP

revision submitted by the Governor of Montana on May 13, 1996, which

included revisions to the Lincoln County regulations regarding open

burning. EPA is proposing to approve these SIP revisions because they

are consistent with the applicable requirements of the Clean Air Act,

as amended (Act), and EPA guidance.

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 amendment and anticipates no adverse comments. A detailed

rationale for EPA's approval 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be withdrawn and all public comments received will be addressed in a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 now.

DATES: Comments on this proposed rule must be received in writing by

October 30, 1996.

ADDRESSES: Written comments on this action should be addressed to Vicki

Stamper, 8P2-A, at the EPA Regional Office listed below. Copies of the

State's submittals and documents relevant to this proposed rule are

available for inspection during normal business hours at the following

locations: Air Programs Branch, Environmental Protection Agency, Region

VIII, 999 18th Street, Suite 500, Denver, Colorado 80202-2405; and

Montana Department of Environmental Quality, Air Quality Division,

Cogswell Building, Helena, Montana 59620-0901.

FOR FURTHER INFORMATION CONTACT: Vicki Stamper at (303) 312-6445.

SUPPLEMENTARY INFORMATION: See the information provided in the Direct

Final action which is located in the Rules Section of this Federal

Register.

Dated: August 29, 1996.

Patricia D. Hull,

Acting Regional Administrator.

[FR Doc. 96-24531 Filed 9-27-96; 8:45 am]

BILLING CODE 6560-50-P