Proposed Rule2025-14980

Air Plan Approval; State of Kansas; Attainment Redesignation for the 2008 Lead NAAQS and Associated Maintenance Plan

Primary source

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Published
August 7, 2025

Issuing agencies

Environmental Protection Agency

Abstract

The Environmental Protection Agency (EPA) is proposing to approve the request to redesignate portions of Saline County, Salina, Kansas to attainment for the 2008 lead National Ambient Air Quality Standards (NAAQS). The EPA's proposed approval of the redesignation request is based on the determination that the Salina area has met the criteria for redesignation to attainment set forth in the Clean Air Act (CAA), including the determination that the area has attained the standard. Additionally, the EPA is proposing to approve the State's plan for maintaining the 2008 lead NAAQS in the Salina area for ten years beyond redesignation.

Full Text

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<title>Federal Register, Volume 90 Issue 150 (Thursday, August 7, 2025)</title>
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[Federal Register Volume 90, Number 150 (Thursday, August 7, 2025)]
[Proposed Rules]
[Pages 38095-38102]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2025-14980]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Parts 52 and 81

[EPA-R07-OAR-2025-0693; FRL-12887-01-R7]


Air Plan Approval; State of Kansas; Attainment Redesignation for 
the 2008 Lead NAAQS and Associated Maintenance Plan

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

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SUMMARY: The Environmental Protection Agency (EPA) is proposing to 
approve the request to redesignate portions of Saline County, Salina, 
Kansas to attainment for the 2008 lead National Ambient Air Quality 
Standards (NAAQS). The EPA's proposed approval of the redesignation 
request is based on the determination that the Salina area has met the 
criteria for redesignation to attainment set forth in the Clean Air Act 
(CAA), including the determination that the area has attained the 
standard. Additionally, the EPA is proposing to approve the State's 
plan for maintaining the 2008 lead NAAQS in the Salina area for ten 
years beyond redesignation.

DATES: Comments must be received on or before September 8, 2025.

ADDRESSES: You may send comments, identified by Docket ID No. EPA-R07-
OAR-2025-0693 to <a href="https://www.regulations.gov">https://www.regulations.gov</a>. Follow the online 
instructions for submitting comments. All submissions received must 
include the Docket ID No. for this rulemaking. Comments received will 
be posted without change to <a href="https://www.regulations.gov">https://www.regulations.gov</a>, including any 
personal information provided. For detailed instructions on sending 
comments and additional information on the rulemaking process, see the 
``Written Comments'' heading of the SUPPLEMENTARY INFORMATION section 
of this document.

FOR FURTHER INFORMATION CONTACT: Jennifer Kissel, Environmental 
Protection Agency, Region 7 Office, Air

[[Page 38096]]

and Radiation Division, 11201 Renner Boulevard, Lenexa, Kansas 66219; 
telephone number: (913) 551-7982; email address: <a href="/cdn-cgi/l/email-protection#9bf0f2e8e8fef7b5f1fef5f5e2dbfeebfab5fcf4ed"><span class="__cf_email__" data-cfemail="c2a9abb1b1a7aeeca8a7acacbb82a7b2a3eca5adb4">[email&#160;protected]</span></a>.

SUPPLEMENTARY INFORMATION: Throughout this document ``we,'' ``us,'' and 
``our'' refer to the EPA. This section provides additional information 
by addressing the following:

Table of Contents

I. Written Comments
II. What action is the EPA proposing to take?
III. Background for the EPA's Proposed Action
IV. Have the requirements for approval of a SIP revision been met?
V. The EPA's Analysis of the State's Request
    a. Criteria (1)--The Area Has Attained the 2008 Lead NAAQS
    b. Criteria (2)--The Area Has a Fully Approved SIP Under Section 
110(k)
    c. Criteria (3)--The Air Quality Improvement Is Due to Permanent 
and Enforceable Reductions in Emissions Resulting From 
Implementation of the Applicable SIP and Applicable Federal Air 
Pollutant Control Regulations and Other Permanent Enforceable 
Reductions
    d. Criteria (4)--The Administrator Has Fully Approved a 
Maintenance Plan for the Area as Meeting the Requirements of Section 
175A
    1. Attainment Emissions Inventory
    2. Maintenance Demonstration
    3. Monitoring Network
    4. Verification of Continued Attainment
    5. Contingency Plan
    e. Criteria (5)--The Area Has Met All Applicable Requirements 
Under Section 110 and Part D
VI. Summary of Proposed Action
VII. Incorporation by Reference
VIII. Statutory and Executive Order Reviews

I. Written Comments

    Submit your comments, identified by Docket ID No. EPA-R07-OAR-2025-
0693, at <a href="https://www.regulations.gov">https://www.regulations.gov</a>. Once submitted, comments cannot 
be edited or removed from <a href="http://Regulations.gov">Regulations.gov</a>. 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, the full the 
EPA public comment policy, information about CBI or multimedia 
submissions, and general guidance on making effective comments, please 
visit <a href="https://www.epa.gov/dockets/commenting-epa-dockets">https://www.epa.gov/dockets/commenting-epa-dockets</a>.

II. What action is the EPA proposing to take?

    The EPA is proposing to approve the request submitted by the State 
of Kansas (hereinafter referred to as the State) to redesignate the 
Saline County, Salina, Kansas nonattainment area (hereinafter referred 
to as Salina nonattainment area) to attainment for the 2008 lead NAAQS.
    On March 20, 2025, the State submitted a redesignation request and 
plan that demonstrates attainment of the 2008 lead NAAQS. Also included 
in the submittal is an associated maintenance plan to ensure that the 
area continues to attain the standard ten years beyond redesignation. 
Based on our review of the State's plan, which is described in detail 
in the following sections and in the EPA's technical support document 
(TSD), the EPA proposes to approve the redesignation request for the 
Salina nonattainment area and associated maintenance plan. The 
redesignation request, maintenance plan, and the EPA TSD are included 
in the docket for this action. As part of this proposed action, the EPA 
also proposes to approve a revision to the Kansas SIP to incorporate a 
construction permit modification, which was issued on December 27, 2018 
(hereinafter referred to as the December 2018 permit) for the Stryten 
Salina, LLC facility (formerly known as Exide Technologies, hereinafter 
referred to as Stryten) which contains an updated control strategy to 
control lead emissions. The December 2018 permit incorporates three 
permit modifications to the facility's construction permit that was 
originally issued August 18, 2014 (hereinafter referred to as the 
August 2014 permit.)

III. Background for the EPA's Proposed Action

    On November 12, 2008, the EPA published a revision to the lead 
NAAQS, lowering the standard from 1.5 micrograms per cubic meter 
([mu]g/m\3\) to 0.15 [mu]g/m\3\ (73 FR 66964).
    Effective November 22, 2011, the EPA designated the Salina area as 
nonattainment for the 2008 lead NAAQS based on air quality monitoring 
data from 2008 through 2010 (76 FR 72097).
    The Stryten lead acid battery manufacturing plant located in 
Salina, KS was the main source of lead emissions impacting the 
violating monitor. On February 25, 2015, the State submitted a plan to 
bring the area into attainment of the standard, which was approved by 
the EPA on July 20, 2016 (81 FR 47034). The Salina lead attainment plan 
included a control strategy consisting of process and control device/
equipment modifications with corresponding emission limitations, 
building enclosure projects, negative pressure and particulate capture 
ventilation systems, and paving projects at the Stryten facility. The 
mechanism to enforce the control strategy is the August 2014 
construction permit issued to Stryten. With air quality monitoring data 
registering violations of the 2008 lead NAAQS from July 2016 through 
October 2016, the area did not attain by the statutory deadline of 
December 31, 2016. For this reason, Stryten implemented contingency 
measures and additional control strategies made enforceable through 
modifications to the August 2014 permit, the most recent of which is 
the December 2018 permit.\1\ The additional emission reduction measures 
included better control device filtration efficiency and monitoring, 
expansion of negative pressure ventilation of all lead-emitting process 
areas, additional paving of plant property, and dust suppression on 
plant grounds and roadways using a water truck and vacuum street 
sweeper. See the State's maintenance plan and the December 2018 permit 
for more information on the updated control strategy.
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    \1\ Modifications to Stryten's August 2014 construction permit 
were also issued on January 11, 2017 and June 23, 2017. The December 
2018 permit modification incorporates and maintains requirements 
from the previous construction permits. The December 2018 permit 
modification is included in appendix A of the State's maintenance 
plan.
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    Following implementation of the additional emission reduction 
measures starting in 2017, ambient lead concentrations decreased in the 
area. Air quality monitoring data from 2017-2019, 2018-2020, and 2019-
2021 show attainment of the 2008 lead NAAQS.
    The State received a Change of Ownership/Operator Notification in 
2020 notifying the State that Stryten is the owner of all permits 
related to the lead acid battery manufacturing facility related to 
Source Identification No. 1690035.

IV. Have the requirements for approval of a SIP revision been met?

    The State's redesignation submission meets the public notice 
requirements for SIP submissions in accordance with 40 CFR 51.102. The 
submission also satisfies the completeness criteria of 40 CFR part 51, 
appendix V. The State provided public notice on this SIP revision from 
January 23, 2025, to February 24, 2025, and received no

[[Page 38097]]

comments. In addition, as explained in this proposed action and in more 
detail in the TSD, the revision meets the substantive SIP requirements 
of the CAA, including section 110 and implementing regulations.

V. The EPA's Analysis of the State's Request

    The CAA provides the requirements for redesignating a nonattainment 
area to attainment. Specifically, section 107(d)(3)(E) of the CAA 
allows for redesignation provided the following criteria are met: (1) 
the Administrator determines that the area has attained the applicable 
NAAQS; (2) the Administrator has fully approved the applicable 
implementation plan for the area under section 110(k); (3) the 
improvement in air quality is due to permanent and enforceable 
reductions in emissions resulting from implementation of the applicable 
SIP and applicable Federal air pollutant control regulations and other 
permanent and enforceable reductions; (4) the Administrator has fully 
approved a maintenance plan for the area as meeting the requirements of 
section 175A; and (5) the state containing such area has met all 
requirements applicable to the area under section 110 and part D of 
title I of the CAA.
    The EPA has provided guidance on redesignation in the General 
Preamble \2\ for the implementation of title I of the CAA Amendments of 
1990 (April 16, 1992, 57 FR 13498, and supplemented on April 28, 1992, 
57 FR 18070) and has provided further guidance on processing 
redesignation requests in the following documents:
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    \2\ State Implementation Plans; General Preamble for the 
Implementation of Title I of the Clean Air Act Amendments of 1990,'' 
57 FR 13498, April 16, 1992.
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    1. ``Procedures for Processing Requests to Redesignate Areas to 
Attainment,'' Memorandum from John Calcagni, Director, Air Quality 
Management Division, September 4, 1992 (hereafter referred to as the 
``Calcagni Memorandum''); \3\
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    \3\ See the docket for this action and at <a href="https://www.epa.gov/sites/default/files/2016-03/documents/calcagni_memo_-_procedures_for_processing_requests_to_redesignate_areas_to_attainment_090492.pdf">https://www.epa.gov/sites/default/files/2016-03/documents/calcagni_memo_-_procedures_for_processing_requests_to_redesignate_areas_to_attainment_090492.pdf</a>.
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    2. ``State Implementation Plan (SIP) Actions Submitted in Response 
to CAA Deadlines,'' Memorandum from John Calcagni, Director, Air 
Quality Management Division, October 28, 1992; and
    3. ``Part D New Source Review (Part D NSR) Requirements for Areas 
Requesting Redesignation to Attainment,'' Memorandum from Mary D. 
Nichols, Assistant Administrator for Air and Radiation, October 14, 
1994.
    These documents are included in the docket for this proposed 
action.

a. Criteria (1)--The Area Has Attained the 2008 Lead NAAQS

    For designating a nonattainment area to attainment, the CAA 
requires the EPA to determine that the area has attained the applicable 
NAAQS (CAA section 107(d)(3)(E)(i)). The EPA is proposing to determine 
that the Salina nonattainment area is attaining the 2008 lead NAAQS 
based upon complete, quality-assured, and certified ambient air quality 
monitoring data from 2017-2019, 2018-2020, and 2019-2021 that show that 
the area has monitored attainment of the 2008 Lead NAAQS.
    According to 40 CFR 50.16, the 2008 lead NAAQS is met when the 
maximum arithmetic 3-month mean concentration for a 3-year period, as 
determined in accordance with 40 CFR part 50, appendix R, is less than 
or equal to 0.15 [mu]g/m\3\ at all relevant monitoring sites in the 
subject area. The EPA refers to this maximum rolling three-month 
average over a three-year period as the ``design value.'' The form of 
the standard is based on the maximum three-month rolling average over a 
three-year period (thirty-six rolling calendar quarters, or thirty-
eight total months).
    The State operated the original monitoring site in Salina from 2010 
to 2019. The site was relocated to the current location 90 meters east 
of the original site in October 2019 and was approved by the EPA. The 
EPA's TSD and the State's maintenance plan have more information 
concerning relocation of the monitor.
    The area has not recorded a three-month average lead value at the 
air monitor greater than 0.15 [mu]g/m\3\ during any three-month 
calendar period since the three-month period ending October 2016. Table 
1 summarizes the annual maximum 3-month rolling average lead 
concentrations and 3-year design values for the Salina lead monitor. As 
demonstrated by the data in the table, design values for the 2017-2019, 
2018-2020, and 2019-2021 periods are in compliance with the 2008 lead 
NAAQS.

   Table 1--Summary of Annual Maximum 3-Month Rolling Average Lead Concentrations and Design Values for Salina
                                             Monitor From 2015-2021
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                                                                                            Max 3-month rolling
                                                     Annual max 3-month                     average design value
                       Year                            rolling average     3-Year period   for the 3-year period
                                                        ([mu]g/m\3\)                            ([mu]g/m\3\)
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2015..............................................                  0.11  ...............  .....................
2016..............................................                  0.18  ...............  .....................
2017..............................................                  0.15        2015-2017                   0.18
2018..............................................                  0.05        2016-2018                   0.18
2019..............................................                  0.05        2017-2019                 * 0.15
2020..............................................                  0.05        2018-2020                 * 0.05
2021..............................................                  0.04        2019-2021                 * 0.05
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* Design values in attainment of the 2008 lead NAAQS.

    Due to equipment failures and electrical malfunctions at the 
monitoring site between May 5, 2022, and June 16, 2022, the State was 
not able to meet data completeness thresholds required to calculate 
valid lead design values for 2020-2022, 2021-2023, and 2022-2024. While 
design values for these periods are not available, the State's plan 
references 2022 and 2023 lead data and preliminary lead data from 2024 
that are consistent with attainment of the standard. More information 
on the lead monitoring data can be found in the State's maintenance 
plan and in the TSD.

[[Page 38098]]

    Based on the EPA's review of this data, the EPA proposes to find 
that the Salina area has attained the 2008 lead NAAQS.

b. Criteria (2)--The Area Has a Fully Approved SIP Under Section 110(k)

    For designating a nonattainment area to attainment, the CAA 
requires that the Administrator has fully approved the applicable 
implementation plan for the area under section 110(k) (CAA section 
107(d)(3)(E)(ii)). The EPA approved the State's attainment plan in a 
Federal Register rulemaking dated July 20, 2016 (81 FR 47034). The EPA 
has determined that the State has met all of the requirements for 
approval of the State's attainment SIP revision.

c. Criteria (3)--The Air Quality Improvement Is Due to Permanent and 
Enforceable Reductions in Emissions Resulting From Implementation of 
the Applicable SIP and Applicable Federal Air Pollutant Control 
Regulations and Other Permanent Enforceable Reductions

    For redesignating a nonattainment area to attainment, section 
107(d)(3)(E)(iii) of the CAA requires the EPA to determine that the air 
quality improvement in the area is due to permanent and enforceable 
reductions in emissions resulting from implementation of the SIP, 
applicable Federal air pollution control regulations, and other 
permanent and enforceable reductions. The EPA proposes to find that the 
State has demonstrated that the observed air quality improvement in the 
Salina nonattainment area is due to permanent and enforceable 
reductions in emissions.
    Despite implementation of the control strategy contained in the 
August 2014 permit, the Salina nonattainment area failed to attain the 
lead standard by December 31, 2016, triggering implementation of 
contingency measures at Stryten as specified in the permit. Stryten was 
subsequently issued three air construction permit modifications with 
updated control strategies that are incorporated in the December 2018 
permit and are enforceable by the State and the EPA. The December 2018 
permit includes additional emissions limitations and work practice 
controls that are attributed to the area's attainment of the NAAQS, 
such as baghouse improvements, street sweeping, and other fugitive dust 
measures.
    Following implementation of the additional emission reduction 
measures from the December 2018 permit, ambient lead concentrations 
decreased and the Salina nonattainment area came into compliance with 
the 2008 lead NAAQS. Section IV. of the TSD and section 2 of the 
State's submittal describes the control strategy and new lead emission 
reduction measures included in the December 2018 permit. The State 
included the December 2018 permit in appendix A of the State submittal 
for approval into the SIP. Once the EPA approves Stryten's December 
2018 permit as part of this redesignation action, the enhanced control 
strategy in the December 2018 permit will be both permanent and 
enforceable.
    Based on the information provided in the State's maintenance plan, 
the EPA proposes to find that Kansas has demonstrated that the observed 
air quality improvements in the Salina nonattainment area are due to 
implementation of the requirements of the August 2014 and December 2018 
permits.

d. Criteria (4)--The Administrator Has Fully Approved a Maintenance 
Plan for the Area as Meeting the Requirements of Section 175A

    For designating a nonattainment area to attainment, the CAA 
requires that the Administrator has fully approved a maintenance plan 
for the area as meeting the requirements of section 175A (CAA section 
107(d)(3)(E)(iv)). In conjunction with its redesignation request 
submitted to the EPA on March 20, 2025, the State also submitted a 
maintenance plan to provide for the ongoing attainment of the 2008 lead 
NAAQs through the year 2036, which is at least 10 years following the 
effective date of approval of the redesignation SIP revision. The EPA 
has reviewed the maintenance plan and proposes to find that it meets 
the requirements of section 175A of the CAA as explained further below.
    Section 175A of the CAA establishes requirements for maintenance 
plans seeking redesignation from nonattainment to attainment. Under 
section 175A, the plan must demonstrate continued attainment of the 
applicable NAAQS for at least ten years after the EPA approves a 
redesignation to attainment. Eight years after redesignation, a state 
must submit a revised maintenance plan which demonstrates that 
attainment will continue to be maintained for ten years following the 
initial ten-year maintenance period. To address the possibility of 
future NAAQS violations, the maintenance plan must contain contingency 
measures with a schedule for implementation as the EPA deems necessary 
to assure prompt correction of any future NAAQS violations.
    The EPA's interpretation of section 175A is contained in the 
Calcagni Memorandum.\4\ The Calcagni Memorandum provides guidance on 
the content of a maintenance plan, explaining that it should address 
five requirements: (1) An emissions inventory; (2) a maintenance 
demonstration; (3) an air quality monitoring commitment; (4) 
verification of continued attainment; and (5) a contingency plan.
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    \4\ See the docket for this action and at <a href="https://www.epa.gov/sites/default/files/2016-03/documents/calcagni_memo_-_procedures_for_processing_requests_to_redesignate_areas_to_attainment_090492.pdf">https://www.epa.gov/sites/default/files/2016-03/documents/calcagni_memo_-_procedures_for_processing_requests_to_redesignate_areas_to_attainment_090492.pdf</a>.
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    Section 175A requires a state seeking redesignation to attainment 
to submit a SIP revision to provide for the maintenance of the NAAQS in 
the area ``for at least 10 years after the redesignation.'' The EPA has 
interpreted this as a showing of maintenance ``for a period of ten 
years following redesignation,'' Calcagni Memorandum at page 9. Where 
the modeling method of showing maintenance is used, a state must show 
that ``the future mix of sources and emission rates will not cause a 
violation of the NAAQS.'' Id. Modeling should ``contain a summary of 
the air quality concentrations expected to result from application of 
the control strategy'' and ``identify and describe the dispersion model 
or other air quality model used to project ambient concentrations.'' 
Id.
    The following provides a discussion of how the EPA has proposed to 
determine that the State's maintenance plan meets the requirements of 
175A.
1. Attainment Emissions Inventory
    The State is required to develop an inventory of actual emissions 
to identify the level of emissions sufficient to attain the NAAQS. 
Stryten is the only point source of lead in the Salina nonattainment 
area, and there are no nonpoint sources of lead emissions in the area. 
The State submitted the lead emissions inventory for the Stryten 
facility in table 3-1 in the maintenance plan. The emissions inventory 
is summarized in table 2. The emissions inventory includes Stryten's 
actual, facility-wide lead emissions from 2015-2021 in tons/year.

[[Page 38099]]



   Table 2--Stryten's Reported Facility-Wide Emissions From 2015-2021
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                                                                Lead
                           Year                               emissions
                                                             (tons/year)
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2015......................................................          0.36
2016......................................................          0.32
2017......................................................          0.19
2018......................................................          0.14
2019......................................................          0.15
2020......................................................          0.10
2021......................................................          0.08
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    Table 2 shows that total lead emissions in the nonattainment area 
decline after 2017, which reflects enforceable emission reductions 
achieved through implementation of the additional control measures at 
Stryten beginning in 2017.
    As discussed in section V.a. of this preamble, the annual maximum 
3-month rolling average lead concentration has not exceeded the level 
of the 2008 lead NAAQS since 2017. For this reason, Stryten's total 
lead emissions of 0.19 tons in 2017 is consistent with attainment of 
the NAAQS. As shown in table 2, Stryten's lead emissions remain below 
0.19 tons per year from 2018 through 2021. More information can be 
found in the EPA's TSD.
    The EPA proposes to determine that the State has satisfied the 
requirement to develop an attainment inventory.
2. Maintenance Demonstration
    The State may demonstrate maintenance of the 0.15 [micro]g/m\3\ 
standard by either showing that future lead emissions will not exceed 
the level of the attainment inventory, or by modeling to show that the 
future mix of sources and emissions rates will not cause a violation of 
the 2008 lead NAAQS. The demonstration should be for a period of ten 
years following the redesignation. Dispersion modeling is a more 
sophisticated means of demonstrating maintenance than relying solely on 
the attainment emissions inventory because it incorporates meteorology, 
topography, and source characteristics in addition to permitted 
allowable emissions rates.
    As discussed above, the State provides an emissions inventory to 
demonstrate the level of actual emissions consistent with attainment of 
the 2008 lead NAAQS. To demonstrate continued maintenance of the NAAQS 
for a period of at least ten years based on Stryten's permitted 
allowable emissions levels, the State provided two modeling 
demonstration analyses included in appendix B of the State's plan and 
further detailed in the EPA's TSD. As explained in the State's plan, 
lead emissions from Stryten, the only point source of lead in the 
Salina nonattainment area, are expected to remain steady with only 
slight fluctuations throughout the maintenance period. The State does 
not expect any new industry or development through the 2036 maintenance 
period and any new source would need to comply with the NSR permitting 
program, ensuring anti-backsliding of the federally enforceable and 
permanent control strategy. This means that the 2036 projected 
emissions can be represented by the 2017 attainment year.
    The maintenance plan's first modeling analysis was performed by 
Stryten based on implementation of the control measures that are 
enforceable through the December 2018 permit. This analysis is 
documented in detail in the ``Air Quality Dispersion Modeling Report,'' 
prepared for Stryten by Ramboll and submitted to the State on October 
1, 2021 (appendix B, Attachment D of the maintenance plan). 
Additionally, the State conducted a supplemental modeling analysis that 
evaluated an operating scenario characterizing the point sources' 
allowable emission rates at worst-case dispersion conditions. The 
State's supplemental modeling analysis used the same modeling 
configuration and emission rates as the Stryten October 2021 modeling 
but different stack parameters for the point sources in the model, 
specifically stack parameters that are generally less favorable for 
dispersion. The State's supplemental modeling analysis is described in 
detail in appendix B of the maintenance plan. Both Stryten's October 
2021 modeling and the State's supplemental modeling analyses show 
attainment of the 2008 lead NAAQS at receptors throughout the 
nonattainment area. The EPA's review and analysis of both modeling 
demonstrations can be found in the TSD and is consistent with 40 CFR 
part 51, appendix W, Guideline on Air Quality Models (appendix W).\5\
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    \5\ See 89 FR 95031, November 29, 2024.
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    The EPA proposes to find that the maintenance modeling 
demonstrations follow current EPA modeling guidance in appendix W and 
used allowable emission rates consistent with the December 2018 permit. 
As stated above, both demonstrations, including the State's 
supplemental modeling analysis based on a worst-case operating scenario 
with less favorable dispersion characteristics, show modeled attainment 
of the 2008 lead NAAQS throughout the nonattainment area through 2036. 
Therefore, the EPA proposes to find that the State has demonstrated 
maintenance of the 2008 lead NAAQS. The input files used in the 
modeling demonstrations are available by request from the contact 
listed in the FOR FURTHER INFORMATION CONTACT section of this document.
3. Monitoring Network
    Once a nonattainment area has been redesignated, the state must 
continue to operate an appropriate air monitoring network, in 
accordance with 40 CFR part 58, to verify the attainment status of the 
area. The State has committed in its redesignation request and 
maintenance plan for the Salina nonattainment area to operate the lead 
air quality monitor (site ID 20-169-0004) in accordance with 40 CFR 
part 58. Air modeling has shown this monitoring location to be in the 
predicted area of maximum impact from fugitive emissions from Stryten. 
Thus, this air monitoring location continues to be acceptable for 
verifying continued NAAQS attainment. The State will continue to 
operate a lead monitor at this location for a minimum of ten years. As 
required by section 175A, eight years following redesignation the State 
shall submit an additional maintenance plan. The lead monitoring 
network will be revisited at that time. The EPA reviews any changes to 
the State's lead monitoring network in the annual network monitoring 
plan in accordance with 40 CFR part 58.
4. Verification of Continued Attainment
    The State has the legal authority to enforce and implement the 
requirements of the December 2018 permit for Stryten to ensure ongoing 
attainment of the 2008 lead NAAQS. These SIP-approved documents contain 
the permanent and enforceable measures for controlling lead emissions. 
The State commits in its maintenance plan to assure continued 
compliance through monitoring, performance testing, recordkeeping, and 
reporting requirements as established in the 2018 permit. The 
maintenance plan also includes that field representatives have the 
authority to conduct onsite inspections pursuant to K.S.A. 65-3009, 
which is part of the State's air quality program to identify violations 
and take timely and appropriate compliance and enforcement actions. 
Should another source of lead emissions to air seek a permit in the 
area to construct a new source or modify an existing one, the State has 
the authority to evaluate the potential impacts to air quality and 
NAAQS attainment.

[[Page 38100]]

    The maintenance plan also includes that since 2014, Stryten has 
been required to submit a Class 1 annual emissions inventory in 
accordance with K.A.R. 28-19-517. The State annually submits emissions 
inventories to the EPA.
    The State commits in its maintenance plan to continue to operate 
its lead monitoring site to verify the attainment status of the area 
and will continue to work with Region 7 to follow the air monitoring 
network review process, as required by 40 CFR part 58, to determine the 
adequacy of the lead monitoring network.
    The EPA proposes to find that the information in the maintenance 
plan demonstrates that the State has the legal authority to implement 
and enforce all measures necessary to attain and maintain the 2008 lead 
NAAQs.
5. Contingency Plan
    Section 175A(d) of the CAA requires that a maintenance plan include 
contingency provisions, as necessary, to promptly correct any violation 
of the NAAQS in the area following redesignation of the area. The 
State's maintenance plan states that it will require Stryten to 
implement all of the contingency measures in the December 2018 permit 
if a NAAQS violation occurs after redesignation of the area. The State 
established triggers that will initiate a timely response to monitored 
indications of a possible future violation of the 2008 NAAQS as 
described in table 3-2 in the maintenance plan and section X. of the 
December 2018 permit. These contingency measures include, for example, 
increasing dust suppression, installing continuous pressure analyzers/
monitors, completing a root cause analysis, conducting more frequent 
stack testing, or completing new air modeling.
    The EPA proposes to find that the State's contingency measures 
satisfy the pertinent requirements of CAA section 175A(d).

e. Criteria (5)--The Area Has Met All Applicable Requirements Under 
Section 110 and Part D

    For designating a nonattainment area to attainment, the CAA 
requires that the Administrator has fully approved a maintenance plan 
for the area as meeting the requirements under section 110 and Part D 
(CAA section 107(d)(3)(E)(v)). Section 110(a)(2) of title I of the CAA 
delineates the general requirements for an infrastructure SIP, which 
include enforceable emissions and other control measures, means, or 
techniques; provisions for the establishment and operation of 
appropriate devices necessary to collect data on ambient air quality; 
and programs to enforce the limitations. More specifically these 
requirements include, but are not limited to, the following: submittal 
of a SIP that has been adopted by the state after reasonable public 
notice and hearing; provisions for establishment and operation of 
appropriate procedures needed to monitor ambient air quality; 
implementation of a source permit program and provisions for the 
implementation of a Prevention of Significant Deterioration (PSD) 
program; provisions for the implementation of a Nonattainment New 
Source Review (NSR) program; provisions for air pollution modeling and 
provisions for public and local agency participation in planning and 
emission control rule development.
    The other requirements of section 110(a)(2) pertain to the 
administration of the state program to ensure the effectiveness of its 
overall air quality management program. The adequacy of the remaining 
elements of section 110(a)(2) including the State's PSD and 
Nonattainment NSR program, the State's appropriate air monitoring 
program for collecting air quality data, the State's ability to conduct 
air modeling, and the State's provisions for public participation for 
air planning are addressed in the EPA's September 15, 2014 final 
approval of the State's infrastructure SIP revision for the 2008 Lead 
NAAQS (79 FR 54908).
    Finally, section 107(d)(3)(E)(v) requires that the redesignation 
plan meet the requirements of part D. Section 172(c) and identifies key 
provisions that states must address in a nonattainment SIP, including: 
provisions for attainment and the timely implementation of all 
reasonably available control technology (RACT) and reasonably available 
control measures (RACM); provisions for reasonable further progress 
(RFP); provisions for an emissions inventory for the nonattainment 
area; provisions for nonattainment NSR; provisions for other measures, 
including a control strategy with enforceable limits and schedules and 
timetables for compliance; provisions to meet applicable parts of title 
42 section 7410(a)(2); provisions for equivalent technologies; and 
provisions for contingency measures.
    The approved attainment SIP revision contains legally enforceable 
control measures and includes an evaluation of how those measures meet 
RACT and RACM.\6\ The approved attainment SIP also included a plan for 
making RFP. An emissions inventory is included in the attainment SIP 
revision, and an emissions inventory is included as discussed in 
section V. of this preamble. The State has a SIP approved Nonattainment 
NSR program.\7\ The State did not request or use equivalent 
technologies. The December 2018 permit and the maintenance plan 
included in this proposed SIP action include enforceable contingency 
measures and control measures.
---------------------------------------------------------------------------

    \6\ See 81 FR 47034 (July 20, 2016).
    \7\ Kansas Administrative Regulations NONATTAINMENT AREA 
REQUIREMENTS 28-19-16. New source permit requirements for designated 
nonattainment areas and 28-19-16a through 28-19-16m. January 16, 
1990 (55 FR 1420) January 11, 2000 (65 FR 1545).
---------------------------------------------------------------------------

    Section 176(c) of the CAA requires states to establish criteria and 
procedures to ensure that federally supported or funded projects 
conform to the air quality planning goals in the applicable SIP. The 
requirement to determine conformity applies to transportation plans, 
programs, and projects that are developed, funded, or approved under 
title 23 of the United States Code (U.S.C.) and the Federal Transit Act 
(transportation conformity) as well as to all other federally supported 
or funded projects (general conformity). State transportation 
conformity SIP revisions must be consistent with Federal conformity 
regulations relating to consultation, enforcement, and enforceability 
that the EPA promulgated pursuant to its authority under the CAA. 
Considering the elimination of lead additives in gasoline, 
transportation conformity does not apply to the lead NAAQS. See 73 FR 
66964 (November 12, 2008).
    We have reviewed the State's SIP and propose to determine that it 
meets all applicable requirements under section 110 and Part D of the 
CAA to the extent those requirements are applicable for purposes of 
redesignation. EPA has previously approved provisions of the State's 
SIP addressing section 110 requirements (including provisions 
addressing lead) at 40 CFR 52.870.

VI. Summary of Proposed Action

    The EPA is proposing to approve the State's request to redesignate 
the Salina nonattainment area to attainment for the 2008 lead NAAQS. 
Based on our detailed analysis above, the EPA has determined that the 
State's March 20, 2025, request for redesignation demonstrates NAAQS 
attainment and the associated maintenance plan will ensure that the 
area continues to attain the standard. The EPA is also proposing to 
approve the 2018 construction permit into the SIP revision approval for 
the

[[Page 38101]]

area's redesignation and maintenance plan.
    Thus, we are processing this as a proposed action because we are 
soliciting comments. Final rulemaking will occur after consideration of 
any comments.

VII. Incorporation by Reference

    In this document, the EPA is proposing to include regulatory text 
in an EPA final rule that includes incorporation by reference. In 
accordance with requirements of 1 CFR 51.5, the EPA is proposing to add 
incorporation by reference of the Kansas permit issued December 27, 
2018, discussed in section II. of this preamble and as set forth below 
in the proposed amendments to 40 CFR part 52. The EPA has made, and 
will continue to make, these materials generally available through 
<a href="https://www.regulations.gov">https://www.regulations.gov</a> and at the EPA Region 7 Office (please 
contact the person identified in the FOR FURTHER INFORMATION CONTACT 
section of this preamble for more information).

VIII. Statutory and Executive Order Reviews

    Under the CAA, the Administrator is required to approve a SIP 
submission that complies with the provisions of the CAA and applicable 
Federal regulations. 42 U.S.C. 7410(k); 40 CFR 52.02(a). Thus, in 
reviewing SIP submissions, the EPA's role is to approve state choices, 
provided that they meet the criteria of the CAA. Accordingly, this 
action merely approves state law as meeting Federal requirements and 
does not impose additional requirements beyond those imposed by state 
law. For that reason, this action:
    <bullet> Is not a significant regulatory action subject to review 
by the Office of Management and Budget under Executive Order 12866 (58 
FR 51735, October 4, 1993);
    <bullet> Is not subject to Executive Order 14192 (90 FR 9065, 
February 6, 2025) because SIP actions are exempt from review under 
Executive Order 12866;
    <bullet> Does not impose an information collection burden under the 
provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.);
    <bullet> Is certified as not having a significant economic impact 
on a substantial number of small entities under the Regulatory 
Flexibility Act (5 U.S.C. 601 et seq.);
    <bullet> Does not contain any unfunded mandate or significantly or 
uniquely affect small governments, as described in the Unfunded 
Mandates Reform Act of 1995 (Pub. L. 104-4);
    <bullet> Does not have federalism implications as specified in 
Executive Order 13132 (64 FR 43255, August 10, 1999);
    <bullet> Is not subject to Executive Order 13045 (62 FR 19885, 
April 23, 1997) because it approves a state program;
    <bullet> Is not a significant regulatory action subject to 
Executive Order 13211 (66 FR 28355, May 22, 2001); and
    <bullet> Is not subject to requirements of section 12(d) of the 
National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272 
note) because application of those requirements would be inconsistent 
with the CAA.
    In addition, the SIP is not approved to apply on any Indian 
reservation land or in any other area where the EPA or an Indian Tribe 
has demonstrated that a Tribe has jurisdiction. In those areas of 
Indian country, the rule does not have Tribal implications and will not 
impose substantial direct costs on Tribal governments or preempt Tribal 
law as specified by Executive Order 13175 (65 FR 67249, November 9, 
2000).

List of Subjects

40 CFR Part 52

    Environmental protection, Air pollution control, Incorporation by 
reference, Intergovernmental relations, Lead, Reporting and 
recordkeeping requirements.

40 CFR Part 81

    Environmental protection, Air pollution control.

    Dated: July 21, 2025.
James Macy,
Regional Administrator, Region 7.

    For the reasons stated in the preamble, the EPA proposes to amend 
40 CFR parts 52 and 81 as set forth below:

PART 52--APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS

0
1. The authority citation for part 52 continues to read as follows:

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

Subpart R--Kansas

0
2. In Sec.  52.870:
0
a. The table in paragraph (d) is amended by adding the entry ``(6)'' at 
the end of the table; and
0
b. The table in paragraph (e) is amended by adding the entry ``(48)'' 
at the end of the table.
    The additions read as follows:


Sec.  52.870  Identification of plan.

* * * * *
    (d) * * *

                                   EPA-Approved Kansas Source-Specific Permits
----------------------------------------------------------------------------------------------------------------
                                                        State
             Name of source               Permit or   effective          EPA approval date          Explanation
                                          case No.       date
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
(6) Stryten Energy Battery Plant            1690035   12/27/2018  [Date of publication of the     ..............
 (formerly known as Exide).                                        final rule in the Federal
                                                                   Register], 90 FR [Federal
                                                                   Register page where the
                                                                   document begins of the final
                                                                   rule].
----------------------------------------------------------------------------------------------------------------

    (e) * * *

[[Page 38102]]



                                  EPA-Approved Kansas Nonregulatory Provisions
----------------------------------------------------------------------------------------------------------------
                                       Applicable         State
    Name of nonregulatory SIP        geographic or      submittal       EPA approval date         Explanation
            provision              nonattainment area      date
----------------------------------------------------------------------------------------------------------------
 
                                                  * * * * * * *
(48) Lead Redesignation SIP and   Portions of Saline     3/20/2025  [Date of publication of   [EPA-R07-OAR-2025-
 Maintenance Plan.                 County, Salina,                   the final rule in the     0693; FRL-12887-
                                   Kansas.                           Federal Register], 90     01-R7].
                                                                     FR [Federal Register
                                                                     page where the document
                                                                     begins of the final
                                                                     rule].
----------------------------------------------------------------------------------------------------------------

PART 81--DESIGNATION OF AREAS FOR AIR QUALITY PLANNING PURPOSES

0
3. The authority citation for part 81 continues to read as follows:

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

Subpart C--Section 107 Attainment Status Designations

0
4. In Sec.  81.317, the table entitled ``Kansas--2008 Lead NAAQS'' is 
amended by revising the entry ``Saline County, KS:'' to read as 
follows:


Sec.  81.317   Kansas.

* * * * *

                         Kansas--2008 Lead NAAQS
------------------------------------------------------------------------
                                   Designation for the 2008 NAAQS \a\
       Designated area        ------------------------------------------
                                      Date \1\               Type
------------------------------------------------------------------------
Saline County, KS:...........  [Date of publication   Attainment.
                                of the final rule in
                                the Federal
                                Register], 90 FR
                                [Federal Register
                                page where the
                                document begins of
                                the final rule].
    Saline County (part).....
        Area bounded by
         Schilling Rd. on the
         north, \1/4\ mile
         west of S Ohio St.
         on the east, Water
         Well Rd. on the
         south, and 9th
         Street on the west.
 
                              * * * * * * *
------------------------------------------------------------------------
\a\ Includes Indian Country located in each county or area, except as
  otherwise specified.
\1\ December 31, 2011 unless otherwise noted.

[FR Doc. 2025-14980 Filed 8-6-25; 8:45 am]
BILLING CODE 6560-50-P


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