Clean Air Act Approval and Promulgation of State Implementation Plans; Prevention of Significant Deterioration; Designation of Areas for Air Quality Planning Purposes; Montana, North Dakota, South Dakota, Utah, and Wyoming

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Parts 52 and 81

[MT32-1-7117b, ND6-2-7081b, UT21-1-6915b, WY7-1-7042b; FRL-5303-2]

Clean Air Act Approval and Promulgation of State Implementation

Plans; Prevention of Significant Deterioration; Designation of Areas

for Air Quality Planning Purposes; Montana, North Dakota, South Dakota,

Utah, and Wyoming

AGENCY: Environmental Protection Agency (EPA).

ACTION: Notice of proposed rulemaking.

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SUMMARY: In this document, the EPA is proposing approval of revisions

to the State Implementation Plans (SIPs) submitted by the States of

Montana, North Dakota, Utah, and Wyoming. The submittals included

revisions to the prevention of significant deterioration (PSD)

permitting rules of these States mainly to address the replacement of

the total suspended particulate (TSP) increments with increments for

PM-10 (particulate matter 10 micrometers or less in diameter), but also

to address other changes in the Federal PSD permitting regulations and

to make other minor revisions. EPA is also proposing to delete the TSP

area designation tables and to revise and/or create PM-10 area

designation tables in 40 CFR part 81 for these States as well as for

the State of South Dakota (which has been delegated authority to

implement the Federal PSD regulations in 40 CFR 52.21). In the final

rules section of this Federal Register, the EPA is acting on the

States' SIP submittals in a direct final rule without prior proposal

because the Agency views these submittals as noncontroversial and

anticipates no adverse comments. A detailed rationale for the 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 in relation to this rule. If the EPA receives adverse

comments, then the direct final rule will be withdrawn and all public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. The EPA will not institute a second comment period

on this document. Any parties interested in commenting on this

documents should do so at this time.

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

December 4, 1995.

ADDRESSES: Written comments should be addressed to Vicki Stamper, 8ART-

AP, at the Environmental Protection Agency, Region VIII, 999 18th

Street, Suite 500, Denver, Colorado 80202-2466. Copies of the documents

relevant to this proposed rule are available for public 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; Montana Air Quality Division,

Department of Health and Environmental Sciences, 836 Front Street, P.O.

Box 200901, Helena, Montana 59620-0901; North Dakota Division of

Environmental Engineering, State Department of Health and Consolidated

Laboratories, 1200 Missouri Avenue, P.O. Box 5520, Bismarck, North

Dakota 58502-5520; Utah Division of Air Quality, Department of

Environmental Quality, 150 North 1950 West, P.O. Box 144820, Salt Lake

City, Utah, 84114-4820; and Wyoming Air Quality Bureau, Department of

Environmental Quality, Herschler Building, 122 West 25th Street,

Cheyenne, Wyoming 82002.

FOR FURTHER INFORMATION CONTACT: Vicki Stamper at (303) 293-1765.

SUPPLEMENTARY INFORMATION: See the information provided in the direct

final rule of the same title which is located in the Rules Section of

this Federal Register.

Dated: September 19, 1995.

Jack W. McGraw,

Acting Regional Administrator.

[FR Doc. 95-27063 Filed 11-2-95; 8:45 am]

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