Clean Air Act Approval and Promulgation of PMINF10 Implementation Plan for Montana

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[MT7-1-5487b; MT26-2-6874b; FRL-5439-1]

Clean Air Act Approval and Promulgation of PM10

Implementation Plan for Montana

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

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

for the Kalispell, Montana nonattainment area, the Flathead County Air

Pollution Control Program, and a Board Order setting emission limits at

nine stationary sources, submitted by the State of Montana with letters

dated November 25, 1991, January 11, 1994, August 26, 1994, and July

18, 1995, to achieve attainment 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). The SIP was

submitted to satisfy certain federal Clean Air Act requirements for an

approvable moderate nonattainment area PM10 SIP for Kalispell. In

addition, EPA proposes to approve the SIP revisions submitted on August

26, 1994, and July 18, 1995, to satisfy the Federal Clean Air Act

requirement to submit contingency measures for the Kalispell and

Columbia Falls moderate PM10 nonattainment areas. The Columbia

Falls submittal also incorporates minor revisions to the attainment and

maintenance demonstrations for the Columbia Falls moderate PM10

nonattainment area SIP into the Montana SIP. Since the SIP still

adequately demonstrates timely attainment and maintenance of the PM

10 national ambient air quality standards (NAAQS), EPA proposes to

approve these revisions. EPA is also proposing to delete an obsolete

section of the Code of Federal Regulations (CFR) which applied to

further requirements for the Butte total suspended particulates (TSP)

plan.

In the Final Rules Section of the Federal Register, EPA is

approving the

[[Page 11170]]

State's SIP revisions, as a direct final rule without prior proposal

because the Agency views these as noncontroversial revisions 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 EPA receives adverse

comments, the direct final will be withdrawn and all public comments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 action should do

so at this time.

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

April 18, 1996.

ADDRESSES: All written comments should be addressed to: Richard R.

Long, Director, Air Program, EPA Region VIII, at the address listed

below. Information supporting this action can be found at the following

location: EPA Region VIII, Air Program 999 18th Street, Denver,

Colorado 80202-2466. The information may be inspected between 8 a.m.

and 4 p.m., on weekdays, except for legal holidays. A reasonable fee

may be charged for copying.

FOR FURTHER INFORMATION CONTACT: Callie Videtich, Air Program, EPA

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

(303) 312-6434.

SUPPLEMENTARY INFORMATION: See the information provided in the Direct

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

Register.

List of Subjects in 40 CFR Part 52

Environmental Protection, Air pollution control, Hydrocarbons,

Intergovernmental relations, Nitrogen dioxide, Particulate matter,

Reporting and recordkeeping requirements, Sulfur dioxide, Volatile

organic compounds.

Authority: 42 U.S.C. 7401-7671q.

Dated: September 29, 1995.

Jack W. McGraw,

Acting Regional Administrator.

[FR Doc. 96-6003 Filed 3-18-96; 8:45 am]

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