[Federal Register Volume 68, Number 86 (Monday, May 5, 2003)]
[Proposed Rules]
[Pages 23661-23662]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 03-10998]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[IN152-1b; FRL-7481-2]


Approval and Promulgation of Implementation Plans; Indiana

AGENCY: Environmental Protection Agency (EPA).

[[Page 23662]]


ACTION: Proposed rule.

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SUMMARY: The EPA is proposing to approve revisions to volatile organic 
compound (VOC) regulations in 326 Indiana Administrative Code (IAC) 8-
1-2. Indiana submitted a request for this State Implementation Plan 
(SIP) revision on October 21, 2002 and January 10, 2003. These 
regulations affect miscellaneous metal coating operations performing 
dip or flow coating. One revision is that dip and flow coating 
operators may now use a rolling 30-day average to meet VOC content 
limits. This replaces a daily compliance requirement. EPA has 
determined that the extended averaging period is more practical for 
these sources because of the difficulties associated with 
intermittently adding solvent and the higher transfer efficiency 
associated with dip and flow coating operations. Solvent is 
intermittently added to the coating tank to maintain proper viscosity. 
Dip and flow coating generally has a higher transfer efficiency, which 
results in lower emissions, than spray coating. Indiana also added new 
equivalent emission limits for dip and flow coating, and made some 
additional, minor revisions. The requested revisions will aid dip and 
flow coating sources. Dip and flow coating uses less coating compared 
to spray coating, lowering total emissions. By providing alternative 
compliance options, dip and flow coating sources do not have to switch 
to spray coating to be able to demonstrate compliance.

DATES: The EPA must receive written comments by June 4, 2003.

ADDRESSES: You should mail written comments to: J. Elmer Bortzer, 
Chief, Regulation Development Section, Air Programs Branch (AR-18J), 
U.S. Environmental Protection Agency, Region 5, 77 West Jackson 
Boulevard, Chicago, Illinois 60604.
    You may inspect copies of Indiana's submittal at: Regulation 
Development Section, Air Programs Branch (AR-18J), U.S. Environmental 
Protection Agency, Region 5, 77 West Jackson Boulevard, Chicago, 
Illinois 60604.

FOR FURTHER INFORMATION CONTACT: Matt Rau, Environmental Engineer, 
Regulation Development Section, Air Programs Branch (AR-18J), U.S. 
Environmental Protection Agency, Region 5, 77 West Jackson Boulevard, 
Chicago, Illinois 60604, Telephone: (312) 886-6524.

SUPPLEMENTARY INFORMATION: Throughout this document wherever ``we,'' 
``us,'' or ``our'' are used we mean the EPA.

Table of Contents

I. What actions are the EPA taking today?
II. Where can I find more information about this proposal and the 
corresponding direct final rule?

I. What Actions Are the EPA Taking Today?

    The EPA is proposing to approve revisions to 326 IAC 8-1-2. The 
revised rule includes a new compliance method for dip coating and flow 
coating operations. Prior to these revisions, dip and flow coating 
facilities were required to use daily averaging to meet VOC content 
limits. The revised rules allow for calculating the VOC content on a 
30-day rolling average basis for dip or flow coating only. The extended 
averaging period is more practical for these sources because of the 
difficulties associated with intermittently adding solvent and the 
higher transfer efficiency associated with dip and flow coating 
operations. Solvent is intermittently added to the coating tank to 
maintain proper viscosity. Dip and flow coating generally has a higher 
transfer efficiency than spray coating, which results in lower VOC 
emissions.
    Indiana also added new equivalent emission limits at 326 IAC 8-1-
2(a)(9)(A) for dip and flow coating operations. Equivalent emission 
limits are expressed in terms of mass VOC per volume of coating solids.
    Indiana also made several minor revisions to 326 IAC 8-1-2. Most of 
these revisions are simple rewording or adding a word or phrase for 
clarity to portions of the rule.

II. Where Can I Find More Information About This Proposal and the 
Corresponding Direct Final Rule?

    For additional information see the direct final rule published in 
the rules section of this Federal Register.

    Dated: April 2, 2003.
Bharat Mathur,
Acting Regional Administrator, Region 5.
[FR Doc. 03-10998 Filed 5-5-03; 8:45 am]
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