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Federal Register / Vol. 86, No. 151 / Tuesday, August 10, 2021 / Proposed Rules ENVIRONMENTAL PROTECTION
AGENCY
40 CFR Part 52
EPAR09OAR20210371; FRL874601
R9

Air Plan Approval; California; San Diego Air Pollution Control District Environmental Protection Agency EPA.
ACTION: Proposed rule.
AGENCY:

The Environmental Protection Agency EPA is proposing to approve revisions to the San Diego Air Pollution Control District SDAPCD portion of the California State Implementation Plan SIP. These revisions concern emissions of volatile organic compounds VOCs from cold solvent cleaning and stripping operations and from vapor degreasing operations. We are proposing to approve changes to SIP-approved local rules to regulate these emission sources under the Clean Air Act CAA or the Act. We are taking comments on this proposal and plan to follow with a final action.
DATES: Comments must be received on or before September 9, 2021.
ADDRESSES: Submit your comments, identified by Docket ID No. EPAR09
OAR20210371 at https
SUMMARY:

www.regulations.gov. For comments submitted at Regulations.gov, follow the online instructions for submitting comments. Once submitted, comments cannot be edited or removed from Regulations.gov. The EPA may publish any comment received to its public docket. Do not submit electronically any information you consider to be Confidential Business Information CBI
or other information whose disclosure is restricted by statute. Multimedia submissions audio, video, etc. must be accompanied by a written comment.
The written comment is considered the official comment and should include discussion of all points you wish to make. The EPA will generally not consider comments or comment contents located outside of the primary submission i.e. on the web, cloud, or other file sharing system. For additional submission methods, please contact the person identified in the FOR
FURTHER INFORMATION CONTACT section.
For the full EPA public comment policy, information about CBI or multimedia submissions, and general guidance on making effective comments, please visit https www.epa.gov/dockets/
commenting-epa-dockets. If you need assistance in a language other than English or if you are a person with disabilities who needs a reasonable
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accommodation at no cost to you, please contact the person identified in the FOR
FURTHER INFORMATION CONTACT section.
FOR FURTHER INFORMATION CONTACT:
Robert Schwartz, EPA Region IX, 75
Hawthorne St., San Francisco, CA
94105. By phone: 415 9723286 or by email at schwartz.robert@epa.gov.
SUPPLEMENTARY INFORMATION:
Throughout this document, we, us and our refer to the EPA.
Table of Contents I. The States Submittal A. What rules did the State submit?
B. Are there other versions of these rules?
C. What is the purpose of the submitted rule revisions?
II. The EPAs Evaluation and Action A. How is the EPA evaluating the rules?
B. Do the rules meet the evaluation criteria?
C. The EPAs recommendations to further improve the rules D. Public comment and proposed action III. Incorporation by Reference IV. Statutory and Executive Order Reviews
I. The States Submittal A. What rules did the State submit?
Table 1 lists the rules addressed by this proposal with the dates that they were adopted by the local air agency and submitted by the California Air Resources Board CARB.

TABLE 1SUBMITTED RULES
Local agency
Rule

SDAPCD
SDAPCD

67.6.1
67.6.2

On June 7, 2021, the EPA determined that the submittal for SDAPCD Rule 67.6.1 and Rule 67.6.2 met the completeness criteria in 40 CFR part 51
Appendix V, which must be met before formal EPA review.

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B. Are there other versions of these rules?
We approved earlier versions of Rule 67.6.1 and Rule 67.6.2 into the SIP on October 13, 2009.1 The SDAPCD
adopted revisions to the SIP-approved versions on February 10, 2021 and CARB submitted them to us on April 20, 2021. If we take final action to approve the February 10, 2021 versions of Rule 67.6.1 and Rule 67.6.2, these versions will replace the previously approved versions of these rules in the SIP.

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FR 52427.

VerDate Sep<11>2014

16:29 Aug 09, 2021

Jkt 253001

Cold Solvent Cleaning and Stripping Operations
Vapor Degreasing Operations

C. What is the purpose of the submitted rule revisions?
Emissions of VOCs contribute to the production of ground-level ozone and smog, which harm human health and the environment. Section 110a of the CAA requires states to submit regulations that control VOC emissions.
The District revised Rule 67.6.1 to include more stringent solvent cleaning VOC limits, increase the stringency of a qualifying VOC limit for an exemption to the rule, and remove an inappropriate exemption for sources covered by a National Emission Standards for Hazardous Air Pollutants NESHAP
standard. Rule 67.6.2 was revised to increase the stringency of a qualifying VOC limit for an exemption to the rule and to add several housekeeping updates.
Additionally, on December 3, 2020
85 FR 77996, the EPA partially approved and partially disapproved
PO 00000

Revised and adopted
Rule title
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02/10/2021
02/10/2021

Submitted 04/20/2021
04/20/2021

SDAPCDs reasonably available control technology RACT demonstrations for the 2008 8-hr ozone national ambient air quality standards NAAQS also referred to as the 2016 RACT SIP.
These deficiencies were identified in our August 10, 2020 proposed partial approval and partial disapproval.2 For Rule 67.6.1, the deficiency identified was an inappropriate exemption for sources covered by the NESHAP
standard. Revisions to Rule 67.6.1 were submitted on April 20, 2021, in part to correct this deficiency. The EPAs technical support document TSD has more information about these rules.
II. The EPAs Evaluation and Action A. How is the EPA evaluating the rules?
Rules in the SIP must be enforceable see CAA section 110a2, must not interfere with applicable requirements 2 85

E:FRFM10AUP1.SGM

FR 48127.

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