ENVIRONMENTAL PROTECTION AGENCY
<CFR>40 CFR Part 52</CFR>
<DEPDOC>[EPA-R09-OAR-2024-0197; FRL-11981-01-R9]</DEPDOC>
<SUBJECT>Air Plan Revisions; California; Sacramento Metropolitan Air Quality Management District; Reasonably Available Control Technology District</SUBJECT>
<HD SOURCE="HED">AGENCY:</HD>
Environmental Protection Agency (EPA).
<HD SOURCE="HED">ACTION:</HD>
Proposed rule.
<SUM>
<HD SOURCE="HED">SUMMARY:</HD>
The Environmental Protection Agency (EPA) is proposing to approve state implementation plan (SIP) revisions from the Sacramento Metropolitan Air Quality Management District (SMAQMD or “District”) to address Clean Air Act (CAA or “Act”) requirements related to the 2008 8-hour ozone national ambient air quality standards (NAAQS or “standards”). These revisions concern emissions of oxides of nitrogen (NOX) from boilers, gas turbines, and miscellaneous (misc) combustion units and reasonably available control technology (RACT) requirements for major sources of NOX in the portion of the Sacramento Metro, CA, nonattainment area that is subject to SMAQMD jurisdiction. We are taking comments on this proposal and plan to follow with a final action.
</SUM>
<EFFDATE>
<HD SOURCE="HED">DATES:</HD>
Comments must be received on or before August 1, 2024.
</EFFDATE>
<HD SOURCE="HED">ADDRESSES:</HD>
Submit your comments, identified by Docket ID No. EPA-R09-OAR-2024-0197 at
<E T="03">https://www.regulations.gov.</E>
For comments submitted at
<E T="03">Regulations.gov</E>
, follow the online instructions for submitting comments. Once submitted, comments cannot be edited or removed from
<E T="03">Regulations.gov</E>
. 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 (
<E T="03">i.e.,</E>
on the web, cloud, or other file sharing system). For additional submission methods, please contact the person identified in the
<E T="02">FOR FURTHER INFORMATION CONTACT</E>
section. For the full EPA public comment policy, information about CBI or multimedia submissions, and general guidance on making effective comments, please visit
<E T="03">https://www.epa.gov/dockets/commenting-epa-dockets.</E>
If you need assistance in a language other than English or if you are a person with a disability who needs a reasonable accommodation at no cost to you, please contact the person identified in the
<E T="02">FOR FURTHER INFORMATION CONTACT</E>
section.
<FURINF>
<HD SOURCE="HED">FOR FURTHER INFORMATION CONTACT:</HD>
Eugene Chen, EPA Region IX, 75 Hawthorne Street (AIR-3-3), San Francisco, CA 94105. By phone: (415) 947-4304 or by email at
<E T="03">chen.eugene@epa.gov.</E>
</FURINF>
<SUPLINF>
<HD SOURCE="HED">SUPPLEMENTARY INFORMATION:</HD>
Throughout this document, “we,” “us,” and “our” refer to the EPA.
<HD SOURCE="HD1">Table of Contents </HD>
<EXTRACT>
<FP SOURCE="FP-2">I. The State's Submittal</FP>
<FP SOURCE="FP1-2">A. What documents did the State submit?</FP>
<FP SOURCE="FP1-2">B. Are there other versions of the submitted documents?</FP>
<FP SOURCE="FP1-2">C. What is the purpose of the submitted documents?</FP>
<FP SOURCE="FP-2">II. The EPA's Evaluation and Proposed Action</FP>
<FP SOURCE="FP1-2">A. How is the EPA evaluating the submitted documents?</FP>
<FP SOURCE="FP1-2">B. Do the submitted documents meet the evaluation criteria?</FP>
<FP SOURCE="FP1-2">1. Boilers</FP>
<FP SOURCE="FP1-2">2. Gas Turbines</FP>
<FP SOURCE="FP1-2">3. Miscellaneous Combustion Units</FP>
<FP SOURCE="FP1-2">C. Public Comment and Proposed Action</FP>
<FP SOURCE="FP-2">III. Incorporation by Reference</FP>
<FP SOURCE="FP-2">IV. Statutory and Executive Order Reviews</FP>
</EXTRACT>
<HD SOURCE="HD1">I. The State's Submittal</HD>
<HD SOURCE="HD2">A. What documents did the State submit?</HD>
Table 1 lists the documents 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).
<GPOTABLE COLS="5" OPTS="L2,nj,i1" CDEF="xs40,12,r50,12,12">
<TTITLE>Table 1—Submitted Documents</TTITLE>
<CHED H="1">Local agency</CHED>
<CHED H="1">Document/rule No.</CHED>
<CHED H="1">Document title</CHED>
<CHED H="1">Adopted</CHED>
<CHED H="1">Submitted</CHED>
<ROW>
<ENT I="01">SMAQMD</ENT>
<ENT/>
<ENT>Reasonably Available Control Technology (RACT) Permits for Major Stationary Sources of Nitrogen Oxides</ENT>
<ENT>03/28/2024</ENT>
<ENT>04/11/2024</ENT>
</ROW>
</GPOTABLE>
On March 28, 2024, SMAQMD adopted portions of several permits issued under the District's SIP-approved New Source Review (NSR) permit program for submittal into the SIP. These permits contain requirements that regulate emissions of NO
<E T="52">X</E>
, and the District adopted these permits for SIP submission to ensure that its major sources of NO
<E T="52">X</E>
are subject to federally enforceable RACT requirements. A list of the permits (“District Permits”) contained in this SIP revision is included in Table 2 below. On April 11, 2024, CARB submitted this SIP revision to the EPA for approval as a revision to the California SIP. The EPA has reviewed this submittal and finds that it fulfills the completeness criteria of appendix V.
<SU>1</SU>
<FTREF/>
<FTNT>
<SU>1</SU>
See Docket Item A-14, 40 CFR Appendix V to Part 51—Criteria for Determining the Completeness of Plan Submissions.
</FTNT>
<GPOTABLE COLS="5" OPTS="L2,nj,i1" CDEF="s50,12,r50,12,xs88">
<TTITLE>Table 2—District Permits Included in April 11, 2024 Submittal</TTITLE>
<CHED H="1">Source name</CHED>
<CHED H="1">Permit No.</CHED>
<CHED H="1">Unit name/ID</CHED>
<CHED H="1">
Unit size
(MMBtu/hr)
</CHED>
<CHED H="1">Unit type</CHED>
<ENT I="01">Mitsubishi Chemical Carbon Fiber and Composites</ENT>
Misc Combustion Unit.
Misc Combustion Unit.
</ENT>
</ROW>
<ROW>
<ENT I="22"> </ENT>
<ENT>24613</ENT>
<ENT>Oxidation Oven 3</ENT>
<ENT>2</ENT>
<ENT>Misc Combustion Unit.</ENT>
</ROW>
<ROW>
<ENT I="22"> </ENT>
<ENT>24614</ENT>
<ENT>Oxidation Oven 4</ENT>
<ENT>2</ENT>
<ENT>Misc Combustion Unit.</ENT>
</ROW>
<ROW>
<ENT I="22"> </ENT>
<ENT>25397</ENT>
<ENT>Oxidation Oven—Line 31</ENT>
<ENT>3</ENT>
<ENT>Misc Combustion Unit.</ENT>
</ROW>
<ROW>
<ENT I="22"> </ENT>
<ENT>25398</ENT>
<ENT>Oxidation Oven—Line 31</ENT>
<ENT>3</ENT>
<ENT>Misc Combustion Unit.</ENT>
</ROW>
<ROW>
<ENT I="22"> </ENT>
<ENT>25399</ENT>
<ENT>Cleaver Brooks Boiler</ENT>
<ENT>6</ENT>
<ENT>Boiler.</ENT>
</ROW>
<ROW>
<ENT I="01">UC Davis Medical Center</ENT>
<ENT>17549</ENT>
<ENT>Combined Cycle Turbine</ENT>
<ENT>260</ENT>
<ENT>Gas Turbine.</ENT>
</ROW>
<ROW>
<ENT I="22"> </ENT>
<ENT>20216</ENT>
<ENT>Boiler 1</ENT>
<ENT>32</ENT>
<ENT>Boiler.</ENT>
</ROW>
<ROW>
<ENT I="22"> </ENT>
<ENT>20217</ENT>
<ENT>Boiler 2</ENT>
<ENT>32</ENT>
<ENT>Boiler.</ENT>
</ROW>
<ROW>
<ENT I="22"> </ENT>
<ENT>20218</ENT>
<ENT>Boiler 3</ENT>
<ENT>32</ENT>
<ENT>Boiler.</ENT>
</ROW>
<ROW>
<ENT I="22"> </ENT>
<ENT>20219</ENT>
<ENT>Boiler 4</ENT>
<ENT>32</ENT>
<ENT>Boiler.</ENT>
</ROW>
<ROW>
<ENT I="01">Sacramento Metropolitan Utility District (SMUD) Procter & Gamble Power Plant</ENT>
Boiler.
Gas Turbine.
Gas Turbine.
Gas Turbine.
Boiler.
</ENT>
</ROW>
<ROW>
<ENT I="01">SMUD Cosumnes Power Plant</ENT>
<ENT>25801</ENT>
<ENT>Turbine 2</ENT>
<ENT>2,200</ENT>
<ENT>Gas Turbine.</ENT>
</ROW>
<ROW>
<ENT I="22"> </ENT>
<ENT>25800</ENT>
<ENT>Turbine 3</ENT>
<ENT>2,200</ENT>
<ENT>Gas Turbine.</ENT>
</ROW>
<ROW>
<ENT I="01">SMUD Campbell Power Plant</ENT>
<ENT>27118</ENT>
<ENT>Gas Turbine</ENT>
<ENT>1,410</ENT>
<ENT>Gas Turbine.</ENT>
</ROW>
<ROW>
<ENT I="01">SMUD Carson Power Plant</ENT>
<ENT>27151</ENT>
<ENT>Turbine 27151</ENT>
<ENT>600</ENT>
<ENT>Gas Turbine.</ENT>
</ROW>
<ROW>
<ENT I="22"> </ENT>
<ENT>27154</ENT>
<ENT>Cleaver Brooks Boiler</ENT>
<ENT>100</ENT>
<ENT>Boiler.</ENT>
</ROW>
<ROW>
<ENT I="22"> </ENT>
<ENT>27156</ENT>
<ENT>Turbine 27156</ENT>
<ENT>450</ENT>
<ENT>Gas Turbine.</ENT>
</ROW>
</GPOTABLE>
<HD SOURCE="HD2">B. Are there other versions of the submitted documents?</HD>
We have not previously approved district permits into the SIP for any of the sources listed in Table 2. The District Permits were submitted to address our June 30, 2023 action that finalized a partial approval and partial disapproval of the District's “Demonstration of Reasonably Available Control Technology for the 2008 Ozone NAAQS” (“2017 RACT SIP”). The District's 2017 RACT SIP was submitted to demonstrate that its stationary sources are subject to RACT rules for the 2008 8-hour ozone NAAQS.
<SU>2</SU>
<FTREF/>
Our partial disapproval related solely to the RACT element for major sources of NO
<E T="52">X</E>
that relied upon three district rules: Rule 411 (NO
<E T="52">X</E>
from Boilers, Process Heaters and Steam Generators), Rule 413 (Stationary Gas Turbines), and Rule 419 (NO
<E T="52">X</E>
from Miscellaneous Combustion Units). Rules 411 and 413 have previously been approved into the SIP, but Rule 419 was locally adopted and submitted to the EPA as part of the 2017 RACT SIP development process and has not been approved into the SIP. As part of our June 30, 2023 final action, we identified deficiencies with the submitted version of Rule 419 but did not act to approve or disapprove that rule. As discussed in greater detail below, the District elected to submit source-specific permits, rather than
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