Approval and Promulgation of Air Quality Implementation Plans; Utah; Listing of Exempt Volatile Organic Compounds and Approval of Minor Rule Changes for Emissions From Air Strippers and Soil Venting Projects, and Repeal of Perchloroethylene Dry Cleaning Plant Requirements

ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[UT-001-0005b, UT-001-0006b, UT-001-0007b, UT-001-0009b, UT-001-0012b,

UT-001-0013b; FRL-6140-4]

Approval and Promulgation of Air Quality Implementation Plans;

Utah; Listing of Exempt Volatile Organic Compounds and Approval of

Minor Rule Changes for Emissions From Air Strippers and Soil Venting

Projects, and Repeal of Perchloroethylene Dry Cleaning Plant

Requirements

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

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SUMMARY: EPA is proposing to approve State Implementation Plan (SIP)

revisions submitted by the Governor of the State of Utah on November 8,

1995, February 12, 1996, November 20, 1996, May 15, 1997, and June 10,

1998, for the purpose of establishing a revised and updated definition

of a volatile organic compound (VOC) in UACR R307-1-1. The November 8,

1995, February 12, 1996, November 20, 1996, and May 15, 1997 revisions

were necessary to delete volatile methyl siloxanes,

parachlorobenzotrifluoride (PCBTF), acetone, perchloroethylene (PERC),

HFC 43-10mee, HCFC 225ca, and HCFC 225cb as EPA had previously

determined that these compounds have a negligible contribution to

tropospheric ozone formation. The June 10, 1998 submittal incorporated

the deletion of 16 more pollutants from the federal list that were

determined to have a negligible contribution to tropospheric ozone

formation; the compounds are: HFC-32, HFC-161, HFC-236fa, HFC-245ca,

HFC-245ea, HFC-245eb, HFC-245fa, HFC-236ea, HFC-365mfc, HCFC-31, HCFC-

123a, HCFC-151a, C4F9OCH3,

(CF3)2CFCF2OCH3,

C4F9OC2H5, and

(CF3)2CFCF2OC2H5

(compound names only are listed here, refer to 62 FR 44901, August 25,

1997, for the chemical name and 62 FR 44903, August 25, 1997, for the

complete list of exempted VOCs). In addition, this action also approves

the Governor's February 12, 1996, submittal that included minor

revisions to UACR R307-6-1 regarding VOC emissions from air strippers

and soil venting operations. EPA is also approving the Governor's

November 20, 1996, request for the removal of UACR R307-14-8 which had

addressed requirements for perchloroethylene dry cleaning plants

located in ozone nonattainment and maintenance areas. In the Final

Rules section of this Federal Register, EPA is approving the State's

SIP revision as 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 direct final rule. If no adverse comments are received in response

to this rule, no further activity is contemplated in relation to this

rule. 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 action should do so at this time.

[[Page 43655]]

DATES: Comments must be received in writing on or before September 14,

1998.

ADDRESSES: Written comments may be mailed to Richard R. Long, Director,

Air Program, Mailcode 8P2-A, Environmental Protection Agency (EPA),

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

Copies of the documents relevant to this action are available for

public inspection during normal business hours at the Air Program,

Environmental Protection Agency, Region VIII, 999 18th Street, Suite

500, Denver, Colorado, 80202. Copies of the State documents relevant to

this action are available for public inspection at the Utah Department

of Environmental Quality, Division of Air Quality, 150 North 1950 West,

Salt Lake City, Utah 84114-4820.

FOR FURTHER INFORMATION CONTACT: Cindy Rosenberg, EPA, Region VIII,

(303) 312-6436.

SUPPLEMENTARY INFORMATION: See the information provided in the Direct

Final action of the same title which is located in the Rules and

Regulations Section of this Federal Register.

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

Dated: July 30, 1998.

Patricia D. Hull,

Acting Regional Administrator, Region VIII.

[FR Doc. 98-21749 Filed 8-13-98; 8:45 am]

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