Federal Register / Vol. 83, No. 122 / Monday, June 25, 2018 / Proposed Rules 29483 

.com/wps/portal. You may view this service 

information at the FAA, Engine and Propeller 

Standards Branch, 1200 District Avenue, 

Burlington, MA. For information on the 

availability of this material at the FAA, call 

781–238–7759. 

Issued in Burlington, Massachusetts, on 

June 19, 2018. 

Robert J. Ganley, 

Manager, Engine and Propeller Standards 

Branch, Aircraft Certification Service. 

[FR Doc. 2018–13523 Filed 6–22–18; 8:45 am] 

BILLING CODE 4910–13–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

40 CFR Part 52 

[EPA–R09–OAR–2018–0233; FRL–9979– 

35—Region 9] 

Air Plan Approval; California; San 

Diego County Air Pollution Control 

District; Stationary Source Permits and 

Exemptions 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Proposed rule. 

SUMMARY: The Environmental Protection 

Agency (EPA) is proposing to approve 

and conditionally approve revisions to 

the San Diego County Air Pollution 

Control District’s (SDAPCD or 

‘‘District’’) portion of the California 

State Implementation Plan (SIP). These 

revisions concern the District’s New 

Source Review (NSR) permitting 

program for new and modified sources 

of air pollution under section 

110(a)(2)(C) and part D of title I of the 

Clean Air Act (CAA). This action 

updates the SDAPCD’s applicable SIP 

with current SDAPCD permitting rules. 

We are taking comments on this 

proposal and plan to follow with a final 

action. 

DATES: Any comments must arrive by 

July 25, 2018. 

ADDRESSES: Submit your comments, 

identified by Docket ID No. EPA–R09– 

OAR–2018–0233 at http://

www.regulations.gov, or via email to 

R9AirPermits@epa.gov. For comments 

submitted at Regulations.gov, follow the 

online instructions for submitting 

comments. Once submitted, comments 

cannot be removed or edited from 

Regulations.gov. For either manner of 

submission, 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 

http://www2.epa.gov/dockets/ 

commenting-epa-dockets. 

FOR FURTHER INFORMATION CONTACT: YaTing Tsai, EPA Region IX, (415) 972– 

3328, Tsai.Ya-Ting@epa.gov. 

SUPPLEMENTARY INFORMATION: 

Throughout this document, ‘‘we,’’ ‘‘us’’ 

and ‘‘our’’ refer to the EPA. 

Table of Contents 

I. The State’s 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 EPA’s Evaluation and Action 

A. How is the EPA evaluating the 

rules? 

B. Do the rules meet the evaluation 

criteria? 

C. Proposed Action and Public 

Comment 

III. Incorporation by Reference 

IV. Statutory and Executive Order 

Reviews 

I. The State’s Submittal 

A. What rules did the State submit? 

Table 1 lists the rules addressed by 

this proposal with the dates when they 

were adopted by the SDAPCD and 

submitted by the California Air 

Resources Board (CARB), which is the 

governor’s designee for California SIP 

submittals. Collectively, these 

submittals generally constitute the 

SDAPCD’s current program for 

preconstruction review and permitting 

of new or modified stationary sources 

under its jurisdiction. The rule revisions 

that are the subject of this action 

represent a comprehensive revision to 

the SDAPCD’s preconstruction review 

and permitting program and are 

intended to satisfy the requirements 

under part D of title I of the Act 

(nonattainment NSR or NNSR) as well 

as the general preconstruction review 

requirements under section 110(a)(2)(C) 

of the Act (minor NSR). The SDAPCD 

does not implement a SIP-approved 

prevention of significant deterioration 

(PSD) permitting program and has not 

submitted the rules in this action for 

purposes of the PSD program; therefore, 

we are not evaluating whether this SIP 

submittal satisfies PSD program 

requirements at 40 CFR 51.166. 

TABLE 1—SUBMITTED RULES

Rule No. Rule title Adopted 

date 

Submitted 

date 

11 .............................. Exemptions from Rule 10 Permit Requirements .............................................................. 05/11/2016 08/22/2016 

20 .............................. Standards for Granting Permits ........................................................................................ 06/10/1986 11/21/1986 

20.1 ........................... New Source Review—General Provisions ....................................................................... 04/27/2016 06/17/2016 

20.2 * ......................... New Source Review—Non-Major Stationary Sources ..................................................... 04/27/2016 06/17/2016 

20.3 * ......................... New Source Review—Major Stationary Sources and PSD Stationary Sources ............. 04/27/2016 06/17/2016 

20.4 * ......................... New Source Review—Portable Emission Units ............................................................... 04/27/2016 06/17/2016 

20.6 ........................... Standards for Permit to Operate Air Quality Analysis ...................................................... 04/27/2016 06/17/2016 

24 .............................. Temporary Permit to Operate ........................................................................................... 06/29/2016 08/22/2016 

* The following subsections of the Rules 20.2–20.4 were not submitted to the EPA for inclusion in the San Diego SIP: Rule 20.2 Subsections 

(d)(2)(i)(B), (d)(2)(v), (d)(2)(vi)(B) and (d)(3); Rule 20.3 Subsections (d)(1)(vi), (d)(2)(i)(B), (d)(2)(v), (d)(2)(vi)(B) and (d)(3); and Rule 20.4 Subsections (b)(2), (b)(3), (d)(1)(iii), (d)(2)(i)(B), (d)(2)(iv), (d)(2)(v)(B), (d)(3) and (d)(5). 

On October 14, 2016, the EPA 

determined that the submittal of Rules 

20.1, 20.2, 20.3, 20.4 and 20.6 met the 

completeness criteria in 40 CFR part 51 

appendix V, which must be met before 

formal EPA review. On September 27, 


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1Letter dated April 16, 2018, from Jim Swaney, 

P.E., to Carol Sutkus and Doris Lo, Subject: 

‘‘Commitment Letter to Fix Deficiencies in New 

Source Review Rules State Implementation Plan 

Submittal’’; letter dated April 27, 2018, from Dr. 

Michael Benjamin to Alexis Strauss. 

2The EPA approved Rule 11 in its entirety for 

incorporation into the California SIP in September 

22, 1972 (37 FR 19812) and approved revisions in 

1982. 

2016, we determined that the submitted 

versions of Rules 11 and 24 met these 

completeness criteria. On May 21, 1987, 

the submittal of Rule 20 was deemed 

complete by operation of law. 

In addition to these SIP submittals, on 

April 27, 2018 the District and CARB 

transmitted a commitment letter to the 

EPA to adopt and submit specific 

enforceable measures by July 31, 2019 to 

address deficiencies in the submitted 

rules identified by the EPA.1

B. Are there other versions of these 

rules? 

The EPA last approved significant 

revisions or updates to the SDAPCD’s 

SIP-approved NSR program in the 

1980s. The existing SIP-approved NSR 

program for new or modified stationary 

sources under the SDAPCD’s 

jurisdiction generally consists of the 

versions of the rules identified below in 

Table 2. 

TABLE 2—SIP APPROVED RULES

Rule No. Rule title SIP approval 

date 

Federal Register 

citation 

11 ............................ Exemptions from Rule 10 Permit Requirements ....................................................... 07/06/1982 47 FR 29233 2

20 ............................ Standards for Granting Applications ......................................................................... 09/22/1972 37 FR 19812 

20.1 ......................... New Source Review—General Provisions ................................................................ 04/14/1981 46 FR 21757 

20.2 ......................... New Source Review—Non-Major Stationary Sources .............................................. 04/14/1981 46 FR 21757 

20.3 ......................... New Source Review—Major Stationary Sources and PSD Stationary Sources ...... 04/14/1981 46 FR 21757 

20.4 ......................... New Source Review—Portable Emission Units ........................................................ 04/14/1981 46 FR 21757 

20.6 ......................... Standards for Permit to Operate Air Quality Analysis .............................................. 04/14/1981 46 FR 21757 

24 ............................ Temporary Permit to Operate ................................................................................... 10/24/2008 73 FR 63382 

Collectively, these regulations 

establish the NSR requirements that are 

currently in place for both major and 

minor stationary sources under the 

SDAPCD’s jurisdiction in California. If 

the EPA finalizes the action proposed 

herein, these rules will be replaced in 

the SIP by the submitted set of rules 

listed in Table 1. 

C. What is the purpose of the submitted 

rule revisions? 

As noted above and described in 

further detail below, the submitted rules 

are intended to satisfy the minor NSR 

and NNSR requirements of section 

110(a)(2)(C) and part D of title I of the 

Act, and related EPA regulations. Minor 

NSR requirements are generally 

applicable for SIPs in all areas, while 

NNSR requirements apply only for areas 

designated as nonattainment for one or 

more National Ambient Air Quality 

Standards (NAAQS). San Diego County 

is currently classified as a ‘‘moderate’’ 

nonattainment area for the 2008 8-hour 

ozone NAAQS and is designated 

attainment or unclassifiable for all other 

NAAQS. See 40 CFR 81.305. Therefore, 

in addition to being subject to the 

requirements for minor NSR at section 

110(a)(2)(C) of the Act, California is 

required to adopt and implement a SIPapproved NNSR permitting program 

that applies to new or modified major 

stationary sources of ozone and ozone 

precursors within the San Diego County 

nonattainment area, under part D of title 

I of the Act. 

II. The EPA’s Evaluation and Action 

A. How is the EPA evaluating the rules? 

The EPA has evaluated the submitted 

rules for compliance with applicable 

requirements of section 110(a)(2)(C) and 

part D of title I of the CAA and 

associated regulations at 40 CFR 

51.160–165, consistent with the 

District’s current classification as a 

‘‘moderate’’ nonattainment area for the 

2008 8-hour ozone NAAQS. We have 

also reviewed the rules for consistency 

with other CAA general requirements 

for SIP submittals, including 

requirements at section 110(a)(2) 

regarding rule enforceability, and 

requirements at sections 110(l) and 193 

for SIP revisions. 

Section 110(a)(2)(C) of the Act 

requires each SIP to include a program 

to regulate the modification and 

construction of any stationary source 

within the areas covered by the SIP as 

necessary to assure attainment and 

maintenance of the NAAQS. The EPA’s 

regulations at 40 CFR 51.160–51.164 

provide general programmatic 

requirements to implement this 

statutory mandate. These requirements, 

commonly referred to as the ‘‘minor 

NSR’’ or ‘‘general NSR’’ program, apply 

generally to both major and non-major 

stationary sources and modifications 

and in both attainment and 

nonattainment areas, in contrast to the 

specific statutory and regulatory 

requirements for PSD and NNSR 

permitting programs under parts C and 

D of title I of the Act that apply to major 

sources in attainment and 

nonattainment areas, respectively. 

Part D of title I of the Act, and the 

implementing regulations at 40 CFR 

51.165, contain the NNSR program 

requirements for major stationary 

sources and major modifications (as 

those terms are defined at 40 CFR 

51.165) at facilities that are located in a 

nonattainment area and are major 

sources for the pollutants for which the 

area has been designated nonattainment. 

The SDAPCD has elected not to 

submit rules to satisfy requirements of 

the PSD program under part C of title I 

of the Act for major stationary sources 

in attainment areas at this time. 

Accordingly, the EPA is not evaluating 

whether this SIP submittal satisfies PSD 

program requirements at 40 CFR 51.166, 

and some portions of Rules 20.2–20.4 

addressing major sources in attainment 

areas are excluded from the submittal. 

See Table 1. The EPA remains the PSD 

permitting authority in San Diego 

County. 

Section 110(a)(2)(A) of the Act 

requires that regulations submitted to 

the EPA for SIP approval must be clear 

and legally enforceable. Section 110(l) 

of the Act prohibits the EPA from 

approving any SIP revisions that would 

interfere with any applicable 

requirement concerning attainment and 

reasonable further progress (RFP) or any 

other applicable requirement of the 

CAA. Section 193 of the Act prohibits 

the modification of a SIP-approved 

control requirement in effect before 

November 15, 1990 in a nonattainment 


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area, unless the modification ensures 

equivalent or greater emission 

reductions of the relevant pollutant(s). 

With respect to procedures, CAA 

sections 110(a) and 110(l) require that a 

state conduct reasonable notice and 

hearing before adopting a SIP revision. 

B. Do the rules meet the evaluation 

criteria? 

With the exceptions noted below, the 

EPA finds that the submitted rules 

generally satisfy the applicable CAA 

and regulatory requirements. 

Accordingly, we are proposing to fully 

approve Rules 11, 20, and 24 under 

CAA section 110(k)(3), and to 

conditionally approve Rules 20.1, 20.2, 

20.3, 20.4, and 20.6 under CAA section 

110(k)(4). Below, we discuss generally 

our evaluation of the submitted rules. 

The technical support document (TSD) 

included in the docket for this proposed 

rulemaking contains a more detailed 

analysis. 

We find that the submitted rules 

satisfy the minor NSR requirements. 

The rules clearly identify the kinds of 

projects subject to review under the 

District’s program, include legally 

enforceable procedures to ensure that 

construction will not violate the state’s 

control strategy or interfere with 

attainment or maintenance of the 

NAAQS, provide for public availability 

of relevant information, and meet other 

requirements of the minor NSR 

regulations at 40 CFR 51.160–164. In 

general, Rules 11, 20, 20.1, 20.6 and 24 

incorporate general regulatory 

requirements of the minor NSR 

program, while Rules 20.2, 20.3, and 

20.4 apply applicable elements of the 

program to minor stationary sources, 

major stationary sources, and portable 

emission units, respectively. 

We find that the submitted rules 

satisfy nearly all applicable statutory 

and regulatory NNSR requirements, 

including definitions, applicability 

procedures, and requirements for 

sources in nonattainment areas to obtain 

emission reduction offsets and comply 

with the lowest achievable emissions 

rate. These requirements are met 

substantially through Rule 20.1, and 

other elements are addressed in Rules 

20.2–20.4. The EPA has identified two 

deficiencies in the rules. First, the 

submitted rules do not contain 

recordkeeping and reporting 

requirements for sources using an 

actual-to-potential-actual test to 

determine applicability of major source 

requirements. The submitted Rule 20.1 

provides an option for sources to use the 

federal actual-to-potential-actual test 

under 40 CFR 51.165(a)(2)(ii)(B) through 

(F); however, the rule does not include 

associated provisions at 40 CFR 

51.165(a)(6) and (7) that require these 

sources to comply with recordkeeping 

and reporting requirements. Second, the 

rules do not incorporate the requirement 

at section 173(a)(4) of the Act, which 

states that NNSR permit programs shall 

provide that permits to construct and 

operate may not be issued if the EPA 

Administrator has determined that the 

applicable implementation plan for the 

nonattainment area is not being 

adequately implemented. As described 

below, these deficiencies are the basis 

for the EPA’s proposed conditional 

approval of the District’s June 17, 2016 

submittal. 

The submitted rules comply with the 

substantive and procedural 

requirements of CAA section 110(l). 

With respect to the procedural 

requirements, based on our review of 

the public process documentation 

included with the submitted rules, we 

find that the SDAPCD has provided 

sufficient evidence of public notice and 

opportunity for comment and public 

hearings prior to submittal of this SIP 

revision and has satisfied these 

procedural requirements under CAA 

section 110(l). 

With respect to the substantive 

requirements of CAA section 110(l), we 

have determined that our approval of 

the submitted rules would strengthen 

the applicable SIP. The current SIPapproved San Diego NNSR program is 

significantly out of date when compared 

with current federal NNSR regulatory 

requirements, and the updated versions 

of the submitted rules bring the program 

up to date with current requirements. 

As a whole, the submitted rules are 

more stringent and will be more 

protective of air quality in San Diego 

County, and we have determined that 

our approval of this SIP submittal 

would not interfere with any applicable 

requirement concerning attainment and 

RFP or any other applicable requirement 

of the Act. 

Similarly, we find that the submitted 

rules are approvable under section 193 

of the Act. Most of the submitted rules 

were last approved prior to November 

15, 1990, and are subject to the general 

requirement to ensure equivalent or 

greater emission reductions. We have 

determined that the submitted rules will 

ensure greater reductions overall 

relative to the SIP-approved version of 

the rules. 

The submitted rules are otherwise 

consistent with criteria for the EPA’s 

approval of regulations submitted for 

inclusion in the SIP, including the 

requirement at CAA section 110(c)(2)(A) 

that submitted regulations be clear and 

legally enforceable. 

For the reasons stated above and 

explained further in our TSD, we find 

that the submitted NSR rules generally 

satisfy the applicable CAA and 

regulatory requirements for minor NSR 

and NNSR permit programs under CAA 

section 110(a)(2)(C) and part D of title I 

of the Act and other applicable 

requirements, subject to the two 

exceptions noted above where the EPA 

has identified a deficiency. For those 

exceptions, the District and CARB have 

committed to adopt and submit 

revisions to address the identified 

deficiencies within a year of the date of 

approval, consistent with the 

requirements at CAA section 110(k)(4) 

for conditional approval. 

C. Proposed Action and Public 

Comment 

Based on our evaluation of the 

submitted rules, the EPA is proposing to 

fully approve the SDAPCD’s August 22, 

2016 and November 21, 1986 submittals 

(consisting of Rules 11, 20, and 24), and 

to conditionally approve the District’s 

June 17, 2016 submittal (consisting of 

Rules 20.1, 20.2, 20.3, 20.4, and 20.6). 

Under CAA section 110(k)(3), the EPA 

may approve a plan revision in whole 

or in part if it meets all applicable 

requirements. Under CAA section 

110(k)(4), the EPA may conditionally 

approve a plan revision based on a 

commitment by the state to adopt 

specific enforceable measures by a date 

certain but not later than one year after 

the date of the plan approval. 

As described above, the EPA has 

determined that the submitted rules 

generally comply with most applicable 

requirements, but do not satisfy the 

requirements at 40 CFR 51.165(a)(6) and 

(7) and section 173(a)(4) of the Act. On 

April 16, 2018, the District transmitted 

to CARB and the EPA a commitment to 

revise the submitted rules by amending 

Rule 20.1 to incorporate the 

requirements at 40 CFR 51.165(a)(6) and 

(7) and by amending Rule 20.3 to 

incorporate the requirement at CAA 

section 173(a)(4), and to transmit the 

revised rules to CARB no later than June 

30, 2019. The amendments to Rules 20.1 

and 20.3 as described above will cure 

the deficiencies in Rules 20.2, 20.4, and 

20.6. On April 27, 2018, CARB 

committed to submit these rules to the 

EPA no later than July 31, 2019. These 

letters commit the District to adopt 

specific enforceable measures to correct 

the rule deficiencies and commit the 

state to submit them to the EPA by a 

date certain, and the EPA has 

determined that if the District adopts 

and submits these revisions as 

committed, the identified deficiencies 

will be cured. Accordingly, we find that 


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these commitment letters are consistent 

with CAA requirements regarding 

conditional approval at CAA section 

110(k)(4). 

The intended effect of our proposed 

conditional approval action is to update 

the applicable SIP with current 

SDAPCD rules and provide the SDAPCD 

the opportunity to correct the identified 

deficiencies. If we finalize this action as 

proposed, our action would be codified 

through revisions to 40 CFR 52.220 

(Identification of plan—in part) and 40 

CFR 52.248 (Identification of plan— 

conditional approval). 

If the State meets its commitment to 

submit the required measures and the 

EPA approves the submission, then the 

deficiencies listed above will be cured. 

However, if the District fails to submit 

these revisions within the required 

timeframe, the conditional approval will 

become a disapproval, and the EPA will 

issue a finding of disapproval. The EPA 

is not required to propose the finding of 

disapproval. Further, a finding of 

disapproval would start an 18-month 

clock to apply sanctions under CAA 

section 179(b) and a two-year clock for 

a federal implementation plan under 

CAA section 110(c)(1). 

We will accept comments from the 

public on this proposal until July 25, 

2018. 

III. Incorporation by Reference 

In this document, the EPA is 

proposing to include in a final EPA rule 

regulatory text that includes 

incorporation by reference. In 

accordance with requirements of 1 CFR 

51.5, the EPA is proposing to 

incorporate by reference the SDAPCD 

rules described in Table 1 of this 

preamble. The EPA has made, and will 

continue to make, these materials 

available through www.regulations.gov 

and at the EPA Region IX Office (please 

contact the person identified in the FOR

FURTHER INFORMATION CONTACT section of 

this preamble for more information). 

IV. Statutory and Executive Order 

Reviews 

Under the CAA, the EPA 

Administrator is required to approve a 

SIP submission that complies with the 

provisions of the Act 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 Act. 

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: 

• Is not a significant regulatory action 

subject to review by the Office of 

Management and Budget under 

Executive Orders 12866 (58 FR 51735, 

October 4, 1993) and 13563 (76 FR 3821, 

January 21, 2011); 

• Does not impose an information 

collection burden under the provisions 

of the Paperwork Reduction Act (44 

U.S.C. 3501 et seq.); 

• 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.); 

• 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); 

• Does not have Federalism 

implications as specified in Executive 

Order 13132 (64 FR 43255, August 10, 

1999); 

• Is not an economically significant 

regulatory action based on health or 

safety risks subject to Executive Order 

13045 (62 FR 19885, April 23, 1997); 

• Is not a significant regulatory action 

subject to Executive Order 13211 (66 FR 

28355, May 22, 2001); 

• 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 Clean Air Act; 

and 

• Does not provide the EPA with the 

discretionary authority to address, as 

appropriate, disproportionate human 

health or environmental effects, using 

practicable and legally permissible 

methods, under Executive Order 12898 

(59 FR 7629, February 16, 1994). 

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 in 40 CFR Part 52 

Environmental protection, 

Administrative practice and procedure, 

Air pollution control, Carbon monoxide, 

Incorporation by reference, 

Intergovernmental relations, Lead, 

Nitrogen dioxide, Ozone, Particulate 

matter, Reporting and recordkeeping 

requirements, Sulfur dioxide, Volatile 

organic compounds. 

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

Dated: June 4, 2018. 

Michael Stoker, 

Regional Administrator, Region IX. 

[FR Doc. 2018–13348 Filed 6–22–18; 8:45 am] 

BILLING CODE 6560–50–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

40 CFR Parts 52 and 81 

[EPA–R07–OAR–2017–0349; FRL–9979– 

84—Region 7] 

Approval of Missouri Air Quality 

Implementation Plans; Redesignation 

of the Missouri Portion of the St. 

Louis-St. Charles-Farmington, MO-IL 

2008 Ozone Area to Attainment 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Proposed rule. 

SUMMARY: The Environmental Protection 

Agency (EPA) is proposing to approve a 

request from the Missouri Department of 

Natural Resources (MDNR) to 

redesignate the Missouri portion of the 

St. Louis-St. Charles-Farmington, MO-IL 

nonattainment area (‘‘St. Louis area’’ or 

‘‘area’’) to attainment for the 2008 ozone 

National Ambient Air Quality Standard 

(NAAQS). MDNR submitted this request 

on September 12, 2016, with a 

supplemental submission on February 

16, 2018, to include a revised motor 

vehicle emissions budget. EPA is 

proposing this action because the 

request meets the statutory requirements 

for redesignation under the Clean Air 

Act (CAA). As part of this action, EPA 

is also proposing to approve, as a 

revision to the Missouri State 

Implementation Plan (SIP), the state’s 

plan for maintaining the 2008 8-hour 

ozone NAAQS through 2030. Finally, 

EPA finds adequate and is proposing to 

approve, as a SIP revision, the State’s 

2030 volatile organic compound (VOC) 

and oxides of nitrogen (NOX) Motor 

Vehicle Emission Budgets (MVEBs) for 

the Missouri portion of the St. Louis 

area. EPA addressed the Illinois portion 

of the St. Louis area in a separate 

rulemaking action on March 1, 2018. 83 

FR 8756. 

DATES: Comments must be received on 

or before July 25, 2018. 

ADDRESSES: Submit your comments, 

identified by Docket ID No. EPA–R07– 

OAR–2017–0349, to https://

www.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 


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