Federal Register / Vol. 86, No. 25 / Tuesday, February 9, 2021 / Proposed Rules 8729 

1 In March 2008, EPA completed another review 

of the primary and secondary ozone standards and 

tightened them further by lowering the level for 

both to 0.075 ppm. 73 FR 16436 (March 27, 2008). 

Additionally, in October 2015, EPA completed a 

review of the primary and secondary ozone 

standards and tightened them by lowering the level 

for both to 0.70 ppm. 80 FR 65292 (October 26, 

2015). 

2The requirements of CAA section 107(d)(3)(E) 

include attainment of the NAAQS, full approval 

under section 110(k) of the applicable SIP, 

determination that improvement in air quality is a 

result of permanent and enforceable reductions in 

emissions, demonstration that the state has met all 

applicable section 110 and part D requirements, and 

a fully approved maintenance plan under CAA 

section 175A. 

3See 80 FR 12315 (March 6, 2015). 

4 882 F.3d 1138 (D.C. Cir. 2018). 

Order 13175 (65 FR 67249, November 9, 

2000), because the SIP is not approved 

to apply in Indian country located in the 

State, and EPA notes that it will not 

impose substantial direct costs on tribal 

governments or preempt tribal law. 

List of Subjects in 40 CFR Part 52 

Environmental protection, Air 

pollution control, Carbon monoxide, 

Incorporation by reference, Lead, 

Nitrogen dioxide, Ozone, Particulate 

matter, Reporting and recordkeeping 

requirements, Sulfur oxides, Volatile 

organic compounds. 

Dated: February 3, 2021. 

Diana Esher, 

Acting Regional Administrator, Region III. 

[FR Doc. 2021–02616 Filed 2–8–21; 8:45 am] 

BILLING CODE 6560–50–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

40 CFR Part 52 

[EPA–R03–OAR–2020–0488; FRL–10017– 

25–Region 3] 

Air Plan Approval; Pennsylvania; 1997 

8-Hour Ozone National Ambient Air 

Quality Standard Second Maintenance 

Plan for the Clearfield/Indiana Area 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Proposed rule. 

SUMMARY: The Environmental Protection 

Agency (EPA) is proposing to approve a 

state implementation plan (SIP) revision 

submitted by the Commonwealth of 

Pennsylvania. This revision pertains to 

the Commonwealth’s plan, submitted by 

the Pennsylvania Department of 

Environmental Protection (PADEP), for 

maintaining the 1997 8-hour ozone 

national ambient air quality standard 

(NAAQS) (referred to as the ‘‘1997 

ozone NAAQS’’) in the Clearfield/ 

Indiana, Pennsylvania Area. This action 

is being taken under the Clean Air Act 

(CAA). 

DATES: Written comments must be 

received on or before March 11, 2021. 

ADDRESSES: Submit your comments, 

identified by Docket ID No. EPA–R03– 

OAR–2020–0488 at https://

www.regulations.gov, or via email to 

Gordon.Mike@epa.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. For either manner of 

submission, 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. 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. 

FOR FURTHER INFORMATION CONTACT: 

Serena Nichols, Planning & 

Implementation Branch (3AD30), Air & 

Radiation Division, U.S. Environmental 

Protection Agency, Region III, 1650 

Arch Street, Philadelphia, PA 19103. 

The telephone number is (215) 814– 

2053. Ms. Nichols can also be reached 

via electronic mail at Nichols.Serena@

epa.gov. 

SUPPLEMENTARY INFORMATION: On 

February 27, 2020, the PADEP 

submitted a revision to the 

Pennsylvania SIP to incorporate a plan 

for maintaining the 1997 ozone NAAQS 

in the Clearfield/Indiana Area through 

April 20, 2029, in accordance with CAA 

section 175A. 

I. Background 

In 1979, under section 109 of the 

CAA, EPA established primary and 

secondary NAAQS for ozone at 0.12 

parts per million (ppm), averaged over 

a 1-hour period. 44 FR 8202 (February 

8, 1979). On July 18, 1997 (62 FR 

38856),1 EPA revised the primary and 

secondary NAAQS for ozone to set the 

acceptable level of ozone in the ambient 

air at 0.08 ppm, averaged over an 8-hour 

period. EPA set the 1997 ozone NAAQS 

based on scientific evidence 

demonstrating that ozone causes 

adverse health effects at lower 

concentrations and over longer periods 

of time than was understood when the 

pre-existing 1-hour ozone NAAQS was 

set. 

Following promulgation of a new or 

revised NAAQS, EPA is required by the 

CAA to designate areas throughout the 

nation as attaining or not attaining the 

NAAQS. On April 30, 2004 (69 FR 

23858), EPA designated the Clearfield/ 

Indiana Area as nonattainment for the 

1997 ozone NAAQS. The Clearfield/ 

Indiana Area consists of Clearfield and 

Indiana Counties in Pennsylvania. 

Once a nonattainment area has three 

years of complete and certified air 

quality data that has been determined to 

attain the NAAQS, and the area has met 

the other criteria outlined in CAA 

section 107(d)(3)(E),2 the state can 

submit a request to EPA to redesignate 

the area to attainment. Areas that have 

been redesignated by EPA from 

nonattainment to attainment are referred 

to as ‘‘maintenance areas.’’ One of the 

criteria for redesignation is to have an 

approved maintenance plan under CAA 

section 175A. The maintenance plan 

must demonstrate that the area will 

continue to maintain the standard for 

the period extending 10 years after 

redesignation, and it must contain such 

additional measures as necessary to 

ensure maintenance as well as 

contingency measures as necessary to 

assure that violations of the standard 

will be promptly corrected. 

On March 19, 2009 (74 FR 11674), 

EPA approved a redesignation request 

(and maintenance plan) from PADEP for 

the Clearfield/Indiana Area. In 

accordance with section 175A(b), at the 

end of the eighth year after the effective 

date of the redesignation, the state must 

also submit a second maintenance plan 

to ensure ongoing maintenance of the 

standard for an additional 10 years. 

EPA’s final implementation rule for 

the 2008 ozone NAAQS revoked the 

1997 ozone NAAQS and provided that 

one consequence of revocation was that 

areas that had been redesignated to 

attainment (i.e., maintenance areas) for 

the 1997 ozone NAAQS no longer 

needed to submit second 10-year 

maintenance plans under CAA section 

175A(b).3 However, in South Coast Air 

Quality Management District v. EPA 4

(South Coast II), the United States Court 

of Appeals for the District of Columbia 

(D.C. Circuit) vacated EPA’s 


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5 ‘‘Procedures for Processing Requests to 

Redesignate Areas to Attainment,’’ Memorandum 

from John Calcagni, Director, Air Quality 

Management Division, September 4, 1992 (1992 

Calcagni Memo). 6See ‘‘Limited Maintenance Plan Option for 

Nonclassifiable Ozone Nonattainment Areas’’ from 

Sally L. Shaver, Office of Air Quality Planning and 

Standards (OAQPS), dated November 16, 1994; 

‘‘Limited Maintenance Plan Option for 

Nonclassifiable CO Nonattainment Areas’’ from 

Joseph Paisie, OAQPS, dated October 6, 1995; and 

‘‘Limited Maintenance Plan Option for Moderate 

PM10 Nonattainment Areas’’ from Lydia Wegman, 

OAQPS, dated August 9, 2001. 

7The ozone design value for a monitoring site is 

the 3-year average of the annual fourth-highest daily 

maximum 8-hour average ozone concentrations. 

The design value for an ozone nonattainment area 

is the highest design value of any monitoring site 

in the area. 

8For more information, see EPA’s March 19, 2009 

document proposing to redesignate the Clearfield/ 

Indiana Area to attainment for the 1997 ozone 

NAAQS (73 FR 43733). 

9For more information, visit https://

www.epa.gov/sites/production/files/2018-11/ozone_

1997_naaqs_emiss_inv_data_nov_19_2018_0.xlsx. 

10The NEI is a comprehensive and detailed 

estimate of air emissions of criteria pollutants, 

criteria precursors, and hazardous air pollutants 

from air emissions sources. The NEI is released 

every three years based primarily upon data 

provided by State, Local, and Tribal air agencies for 

sources in their jurisdictions and supplemented by 

data developed by EPA. 

interpretation that, because of the 

revocation of the 1997 ozone standard, 

second maintenance plans were not 

required for ‘‘orphan maintenance 

areas,’’ (i.e., areas like the Clearfield/ 

Indiana Area) that had been 

redesignated to attainment for the 1997 

ozone NAAQS and were designated 

attainment for the 2008 ozone NAAQS. 

Thus, states with these ‘‘orphan 

maintenance areas’’ under the 1997 

ozone NAAQS must submit 

maintenance plans for the second 

maintenance period. 

As previously discussed, CAA section 

175A sets forth the criteria for adequate 

maintenance plans. In addition, EPA 

has published longstanding guidance 

that provides further insight on the 

content of an approvable maintenance 

plan, explaining that a maintenance 

plan should address five elements: (1) 

An attainment emissions inventory; (2) 

a maintenance demonstration; (3) a 

commitment for continued air quality 

monitoring; (4) a process for verification 

of continued attainment; and (5) a 

contingency plan. The 1992 Calcagni 

Memo 5 provides that states may 

generally demonstrate maintenance by 

either performing air quality modeling 

to show that the future mix of sources 

and emission rates will not cause a 

violation of the NAAQS or by showing 

that future emissions of a pollutant and 

its precursors will not exceed the level 

of emissions during a year when the 

area was attaining the NAAQS (i.e., 

attainment year inventory). See 1992 

Calcagni Memo at p. 9. EPA further 

clarified in three subsequent guidance 

memos describing ‘‘limited maintenance 

plans’’ (LMPs) 6 that the requirements of 

CAA section 175A could be met by 

demonstrating that the area’s design 

value 7 was well below the NAAQS and 

that the historical stability of the area’s 

air quality levels showed that the area 

was unlikely to violate the NAAQS in 

the future. Specifically, EPA believes 

that if the most recent air quality design 

value for the area is at a level that is 

below 85% of the standard, or in this 

case below 0.071 ppm, then EPA 

considers the state to have met the 

section 175A requirement for a 

demonstration that the area will 

maintain the NAAQS for the requisite 

period. Accordingly, on February 27, 

2020, PADEP submitted the Clearfield/ 

Indiana Area second maintenance plan, 

following EPA’s LMP guidance and 

demonstrating that the area will 

maintain the 1997 ozone NAAQS 

through April 20, 2029, i.e., through the 

entire 20-year maintenance period. 

II. Summary of SIP Revision and EPA 

Analysis 

PADEP’s February 27, 2020 SIP 

submittal outlines a plan for continued 

maintenance of the 1997 ozone NAAQS 

which addresses the criteria set forth in 

the 1992 Calcagni Memo as follows. 

A. Attainment Emissions Inventory 

For maintenance plans, a state should 

develop a comprehensive and accurate 

inventory of actual emissions for an 

attainment year which identifies the 

level of emissions in the area which is 

sufficient to maintain the NAAQS. The 

inventory should be developed 

consistent with EPA’s most recent 

guidance. For ozone, the inventory 

should be based on typical summer 

day’s emissions of nitrogen oxides 

(NOX) and volatile organic compounds 

(VOC), the precursors to ozone 

formation. In the first maintenance plan 

for the Clearfield/Indiana Area, PADEP 

used 2004 for the attainment year 

inventory, because 2004 was one of the 

years in the 2004–2006 three-year 

period when the area first attained the 

1997 ozone NAAQS.8 The Clearfield/ 

Indiana Area continued to monitor 

attainment of the 1997 ozone NAAQS in 

2014. Therefore, the emissions 

inventory from 2014 represents 

emissions levels conducive to continued 

attainment (i.e., maintenance) of the 

NAAQS. Thus, PADEP is using 2014 as 

representing attainment level emissions 

for its second maintenance plan. 

Pennsylvania used 2014 summer day 

emissions from EPA’s 2014 version 7.0 

modeling platform as the basis for the 

2014 inventory presented in Table 1.9

TABLE 1—2014 TYPICAL SUMMER DAY NOX AND VOC EMISSIONS FOR THE CLEARFIELD/INDIANA AREA IN TONS/DAY

County Source category NOX

emissions 

VOC 

emissions 

Clearfield ....................................................................... Point .............................................................................. 0.14 13.16 

Nonpoint ....................................................................... 18.44 1.52 

Onroad .......................................................................... 2.43 8.42 

Nonroad ........................................................................ 1.30 0.67 

Indiana .......................................................................... Point .............................................................................. 0.73 105.90 

Nonpoint ....................................................................... 43.89 2.00 

Onroad .......................................................................... 1.70 3.47 

Nonroad ........................................................................ 0.80 0.94 

The data shown in Table 1 is based on 

the 2014 National Emissions Inventory 

(NEI) version 2.10 The inventory 

addresses four anthropogenic emission 

source categories: Stationary (point) 

sources, stationary nonpoint (area) 

sources, nonroad mobile, and onroad 

mobile sources. Point sources are 

stationary sources that have the 

potential to emit more than 100 tons per 

year (tpy) of VOC, or more than 50 tpy 

of NOX, and which are required to 

obtain an operating permit. Data are 

collected for each source at a facility 

and reported to PADEP. Examples of 


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11This resource document is included in the 

docket for this rulemaking available online at 

https://www.regulations.gov, Docket ID: EPA–R03– 

OAR–2020–0488 and is also available at https://

www.epa.gov/sites/production/files/2018-11/ 

documents/ozone_1997_naaqs_lmp_resource_

document_nov_20_2018.pdf. 

12See also Table II–2 of PADEP’s February 27, 

2020 submittal, included in the docket for this 

rulemaking available online at https://

www.regulations.gov, Docket ID: EPA–R03–OAR– 

2020–0488. 

13This data is also included in the docket for this 

rulemaking available online at https://

www.regulations.gov, Docket ID: EPA–R03–OAR– 

2020–0488 and is also available at https://

www.epa.gov/air-trends/air-quality-designvalues#report. 

14As explained in EPA’s March 19, 2009 

document proposing to redesignate the Clearfield/ 

Indiana Area as attainment for the 1997 ozone 

NAAQS (74 FR 11674), the 2004–2006 DV for the 

Clearfield/Indiana Area was 0.077 ppm. 

15See U.S. EPA, ‘‘Air Quality Modeling Technical 

Support Document for the Updated 2023 Projected 

Ozone Design Values’’, Office of Air Quality 

Planning and Standards, dated June 2018, available 

at https://www.epa.gov/airmarkets/air-qualitymodeling-technical-support-document-updated2023-projected-ozone-design. 

point sources include kraft mills, 

electrical generating units, and 

pharmaceutical factories. Nonpoint 

sources include emissions from 

equipment, operations, and activities 

that are numerous and in total have 

significant emissions. Examples include 

emissions from commercial and 

consumer products, portable fuel 

containers, home heating, repair and 

refinishing operations, and crematories. 

The onroad emissions sector includes 

emissions from engines used primarily 

to propel equipment on highways and 

other roads, including passenger 

vehicles, motorcycles, and heavy-duty 

diesel trucks. The nonroad emissions 

sector includes emissions from engines 

that are not primarily used to propel 

transportation equipment, such as 

generators, forklifts, and marine 

pleasure craft. EPA reviewed the 

emissions inventory submitted by 

PADEP and proposes to conclude that 

the plan’s inventory is acceptable for the 

purposes of a subsequent maintenance 

plan under CAA section 175A(b). 

B. Maintenance Demonstration 

In order to attain the 1997 ozone 

NAAQS, the three-year average of the 

fourth-highest daily average ozone 

concentration (design value, or ‘‘DV’’) at 

each monitor within an area must not 

exceed 0.08 ppm. Based on the 

rounding convention described in 40 

CFR part 50, appendix I, the standard is 

attained if the DV is 0.084 ppm or 

below. CAA section 175A requires a 

demonstration that the area will 

continue to maintain the NAAQS 

throughout the duration of the requisite 

maintenance period. Consistent with the 

prior guidance documents discussed 

previously in this document as well as 

EPA’s November 20, 2018 ‘‘Resource 

Document for 1997 Ozone NAAQS 

Areas: Supporting Information for States 

Developing Maintenance Plans’’ (2018 

Resource Document),11 EPA believes 

that if the most recent DV for the area 

is well below the NAAQS (e.g., below 

85%, or in this case below 0.071 ppm), 

the section 175A demonstration 

requirement has been met, provided that 

prevention of significant deterioration 

requirements, any control measures 

already in the SIP, and any Federal 

measures remain in place through the 

end of the second 10-year maintenance 

period (absent a showing consistent 

with section 110(l) that such measures 

are not necessary to assure 

maintenance). 

For the purposes of demonstrating 

continued maintenance with the 1997 

ozone NAAQS, PADEP provided 3-year 

DVs at monitors located in the 

Clearfield/Indiana Area from 2007 to 

2018. This includes DVs at monitors for 

2005–2007, 2006–2008, 2007–2009, 

2008–2010, 2009–2011, 2010–2012, 

2011–2013, 2012–2014, 2013–2015, 

2014–2016, 2015–2017, and 2016–2018, 

which are shown in Table 2 of this 

document.12 In addition, EPA has 

reviewed the most recent ambient air 

quality monitoring data for ozone in the 

Clearfield/Indiana Area, as submitted by 

Pennsylvania and recorded in EPA’s Air 

Quality System. The most recent DVs 

(i.e., 2017–2019) at monitors located in 

the Clearfield/Indiana Area are also 

shown in Table 2.13

TABLE 2—1997 OZONE NAAQS DESIGN VALUES IN PARTS PER MILLION FOR THE CLEARFIELD/INDIANA AREA

County AQS site ID 2005– 

2007 

2006– 

2008 

2007– 

2009 

2008– 

2010 

2009– 

2011 

2010– 

2012 

2011– 

2013 

2012– 

2014 

2013– 

2015 

2014– 

2016 

2015– 

2017 

2016– 

2018 

2017– 

2019 

Clearfield ........................ 42–033–4000 ................. .076 .073 .071 .073 .072 .074 .071 .066 .065 .064 .066 .064 0.060

Indiana ............................ 42–063–0004 ................. .080 .076 .073 .074 .073 .079 .075 .074 .071 .070 .070 .069 0.067 

As can be seen in Table 2, DVs at all 

monitors located in the Clearfield/ 

Indiana Area have been below 85% of 

the 1997 ozone NAAQS (i.e., 0.071 

ppm) since the 2014–2016 period. The 

highest DV for the 2017–2019 period at 

a monitor in the Clearfield/Indiana Area 

is 0.067 ppm, which is below 85% of 

the 1997 ozone NAAQS. 

Additionally, states can support the 

demonstration of continued 

maintenance by showing stable or 

improving air quality trends. According 

to EPA’s 2018 Resource Document, 

several kinds of analyses can be 

performed by states wishing to make 

such a showing. One approach is to take 

the most recent DV at a monitor located 

in the area and add the maximum 

design value increase (over one or more 

consecutive years) that has been 

observed in the area over the past 

several years. For an area with multiple 

monitors, the highest of the most recent 

DVs should be used. A sum that does 

not exceed the level of the 1997 ozone 

NAAQS may be a good indicator of 

expected continued attainment. As 

shown in Table 2 of this document, the 

largest increase in DVs at a monitor 

located in the Clearfield/Indiana Area 

was 0.006 ppm, which occurred 

between the 2009–2011 (0.073 ppm) and 

2010–2012 (0.079 ppm) DVs at 

monitoring site 42–063–0004. Adding 

0.006 ppm to the highest DV for the 

2017–2019 period (0.067 ppm) results in 

0.073 ppm, a sum that is still below the 

1997 ozone NAAQS. 

The Clearfield/Indiana Area has 

maintained air quality levels well below 

the 1997 ozone NAAQS since the area 

first attained the NAAQS in 2006.14

Additional supporting information that 

the area is expected to continue to 

maintain the standard can be found in 

projections of future year DVs that EPA 

recently completed to assist states with 

the development of interstate transport 

SIPs for the 2015 8-hour ozone NAAQS. 

Those projections, made for the year 

2023, show that the highest DV at a 

monitor located in the Clearfield/ 

Indiana Area is expected to be 0.0654 

ppm.15 Therefore, EPA proposes to 

determine that future violations of the 

1997 ozone NAAQS in the Clearfield/ 

Indiana Area are unlikely. 

C. Continued Air Quality Monitoring 

and Verification of Continued 

Attainment 

Once an area has been redesignated to 

attainment, the state remains obligated 

to maintain an air quality network in 

accordance with 40 CFR part 58, in 


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16A violation of the NAAQS occurs when an 

area’s 3-year design value exceeds the NAAQS. 

17These regulatory measures were considered 

potential cost-effective and timely control strategies 

by the Ozone Transport Commission (OTC) as well 

as the Mid-Atlantic Regional Air Management 

Association and the Mid-Atlantic/Northeast 

Visibility Union. The OTC is a multi-state 

organization responsible for developing regional 

solutions to ground-level ozone pollution in the 

Northeast and Mid-Atlantic, including the 

development of model rules that member states may 

adopt. The OTC member states include: 

Connecticut, Delaware, the District of Columbia, 

Maine, Maryland, Massachusetts, New Hampshire, 

New Jersey, New York, Pennsylvania, Rhode Island, 

Vermont, and Virginia. For more information on the 

OTC, visit https://otcair.org/index.asp. To view the 

model rules developed by the OTC, including those 

for consumer products and portable fuel containers, 

visit https://otcair.org/ 

document.asp?fview=modelrules. 

18Pennsylvania’s existing controls on consumer 

products are under 25 Pa. Code Chapter 130, 

Subchapters B and C (38 Pa.B. 5598). This 

contingency measure includes the adoption of 

additional controls on consumer products such as 

VOC limits for adhesive removers. 

19Existing controls on portable fuel containers 

can be found under 40 CFR part 59, subpart F— 

Control of Evaporative Emissions From New and InUse Portable Fuel Containers. 

order to verify the area’s attainment 

status. In the February 27, 2020 

submittal, PADEP commits to continue 

to operate their air monitoring network 

in accordance with 40 CFR part 58. 

PADEP also commits to track the 

attainment status of the Clearfield/ 

Indiana Area for the 1997 ozone 

NAAQS through the review of air 

quality and emissions data during the 

second maintenance period. This 

includes an annual evaluation of 

vehicles miles traveled and stationary 

source emissions data compared to the 

assumptions included in the LMP. 

PADEP also states that it will evaluate 

the periodic (i.e., every three years) 

emission inventories prepared under 

EPA’s Air Emission Reporting 

Requirements (40 CFR part 51, subpart 

A). Based on these evaluations, PADEP 

will consider whether any further 

emission control measures should be 

implemented for the Clearfield/Indiana 

Area. EPA has analyzed the 

commitments in PADEP’s submittal and 

is proposing to determine that they meet 

the requirements for continued air 

quality monitoring and verification of 

continued attainment. 

D. Contingency Plan 

The contingency plan provisions are 

designed to promptly correct or prevent 

a violation of the NAAQS that might 

occur after redesignation of an area to 

attainment. Section 175A of the CAA 

requires that a maintenance plan 

include such contingency measures as 

EPA deems necessary to assure that the 

state will promptly correct a violation of 

the NAAQS that occurs after 

redesignation. The maintenance plan 

should identify the contingency 

measures to be adopted, a schedule and 

procedure for adoption and 

implementation of the contingency 

measures, and a time limit for action by 

the state. The state should also identify 

specific indicators to be used to 

determine when the contingency 

measures need to be adopted and 

implemented. The maintenance plan 

must require that the state will 

implement all pollution control 

measures that were contained in the SIP 

before redesignation of the area to 

attainment. See section 175(A)(d) of the 

CAA. 

PADEP’s February 27, 2020 submittal 

includes a contingency plan for the 

Clearfield/Indiana Area. In the event 

that the fourth highest eight-hour ozone 

concentration at a monitor in the 

Clearfield/Indiana Area exceeds 0.084 

ppm for two consecutive years, but prior 

to an actual violation of the NAAQS, 

PADEP will evaluate whether additional 

local emission control measures should 

be implemented that may prevent a 

violation of the NAAQS.16 After 

analyzing the conditions causing the 

excessive ozone levels, evaluating the 

effectiveness of potential corrective 

measures, and considering the potential 

effects of Federal, state, and local 

measures that have been adopted but 

not yet implemented, PADEP will begin 

the process of implementing selected 

measures so that they can be 

implemented as expeditiously as 

practicable following a violation of the 

NAAQS. In the event of a violation, 

PADEP commits to adopting additional 

emission reduction measures as 

expeditiously as practicable in 

accordance with the schedule included 

in the contingency plan as well as the 

CAA and applicable Pennsylvania 

statutory requirements. 

PADEP will use the following criteria 

when considering additional emission 

reduction measures to adopt to address 

a violation of the 1997 ozone NAAQS in 

the Clearfield/Indiana Area: (1) Air 

quality analysis indicating the nature of 

the violation, including the cause, 

location, and source; (2) emission 

reduction potential, including extent to 

which emission generating sources 

occur in the nonattainment area; (3) 

timeliness of implementation in terms 

of the potential to return the area to 

attainment as expeditiously as 

practicable; and (4) costs, equity, and 

cost-effectiveness. The measures PADEP 

would consider pursuing for adoption 

in the Clearfield/Indiana Area include, 

but are not limited to, those summarized 

in Table 3 of this document. If 

additional emission reductions are 

necessary, PADEP commits to adopt 

additional emission reduction measures 

to attain and maintain the 1997 ozone 

NAAQS. 

TABLE 3—CLEARFIELD/INDIANA AREA SECOND MAINTENANCE PLAN CONTINGENCY MEASURES

Non-Regulatory Measures: 

Voluntary diesel engine ‘‘chip reflash’’ (installation software to correct the defeat device option on certain heavy-duty diesel engines). 

Diesel retrofit (including replacement, repowering or alternative fuel use) for public or private local onroad or offroad fleets. 

Idling reduction technology for Class 2 yard locomotives. 

Idling reduction technologies or strategies for truck stops, warehouses, and other freight-handling facilities. 

Accelerated turnover of lawn and garden equipment, especially commercial equipment, including promotion of electric equipment. 

Additional promotion of alternative fuel (e.g., biodiesel) for home heating and agricultural use. 

Regulatory Measures: 17

Additional control on consumer products.18

Additional controls on portable fuel containers.19

The contingency plan includes 

schedules for the adoption and 

implementation of both non-regulatory 

and regulatory contingency measures, 

including schedules for adopting 

potential land use planning strategies 

not listed in Table 3 of this document, 

which are summarized in Tables 4 and 

5 of this document, respectively. 


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TABLE 4—IMPLEMENTATION SCHEDULE FOR CLEARFIELD/INDIANA AREA NON-REGULATORY CONTINGENCY MEASURES

Time after triggering event Action 

Within 2 months ................... PADEP will identify stakeholders for potential non-regulatory measures for further development. 

Within 3 months ................... If funding is necessary, PADEP will identify potential sources of funding and the timeframe for when funds would 

be available. 

Within 6 months ................... PADEP will work with the relevant planning commission(s) to identify potential land use planning strategies and 

projects with quantifiable and timely emission benefits. PADEP will also work with the Pennsylvania Department of Community and Economic Development and other state agencies to assist with these measures. 

Within 9 months ................... If state loans or grants are required, PADEP will enter into agreements with implementing organizations. PADEP 

will also quantify projected emission benefits. 

Within 12 months ................. PADEP will submit revised SIP to EPA. 

Within 12–24 months ........... PADEP will implement strategies and projects. 

TABLE 5—IMPLEMENTATION SCHEDULE FOR CLEARFIELD/INDIANA AREA REGULATORY CONTINGENCY MEASURES

Time after triggering event Action 

Within 1 month ..................... PADEP will submit request to begin regulatory development process. 

Within 3 months ................... Request will be reviewed by the Air Quality Technical Advisory Committee (AQTAC), Citizens Advisory Council, 

and other advisory committees as appropriate. 

Within 6 months ................... Environmental Quality Board (EQB) meeting/action. 

Within 8 months ................... PADEP will publish regulatory measure in the Pennsylvania Bulletin for comment as proposed rulemaking. 

Within 10 months ................. PADEP will hold a public hearing and comment period on proposed rulemaking. 

Within 11 months ................. House and Senate Standing Committee and Independent Regulatory Review Commission (IRCC) comment on 

proposed rulemaking. 

Within 13 months ................. AQTAC, Citizens Advisory Council, and other committees will review responses to comment(s), if applicable, and 

the draft final rule. 

Within 16 months ................. EQB meeting/action. 

Within 17 months ................. The IRCC will take action on final rule. 

Within 18 months ................. Attorney General’s review/action. 

Within 19 months ................. PADEP will publish the regulatory measure as a final rule in the Pennsylvania Bulletin and submit to EPA as a 

SIP revision. The regulation will become effective upon publication in the Pennsylvania Bulletin. 

EPA proposes to find that the 

contingency plan included in PADEP’s 

February 27, 2020 submittal satisfies the 

pertinent requirements of CAA section 

175A(d). EPA notes that while six of the 

potential contingency measures 

included in the Commonwealth’s 

second maintenance plan are nonregulatory, their inclusion among other 

measures is overall SIP-strengthening, 

and their inclusion does not alter EPA’s 

proposal to find the LMP is fully 

approvable. EPA also finds that the 

submittal acknowledges Pennsylvania’s 

continuing requirement to implement 

all pollution control measures that were 

contained in the SIP before 

redesignation of the Clearfield/Indiana 

Area to attainment. 

E. Transportation Conformity 

Transportation conformity is required 

by section 176(c) of the CAA. 

Conformity to a SIP means that 

transportation activities will not 

produce new air quality violations, 

worsen existing violations, or delay 

timely attainment of the NAAQS (CAA 

176(c)(1)(B)). EPA’s conformity rule at 

40 CFR part 93 requires that 

transportation plans, programs and 

projects conform to SIPs and establish 

the criteria and procedures for 

determining whether or not they 

conform. The conformity rule generally 

requires a demonstration that emissions 

from the Regional Transportation Plan 

(RTP) and Transportation Improvement 

Program (TIP) are consistent with the 

motor vehicle emissions budget (MVEB) 

contained in the control strategy SIP 

revision or maintenance plan (40 CFR 

93.101, 93.118, and 93.124). An MVEB 

is defined as ‘‘that portion of the total 

allowable emissions defined in the 

submitted or approved control strategy 

implementation plan revision or 

maintenance plan for a certain date for 

the purpose of meeting reasonable 

further progress milestones or 

demonstrating attainment or 

maintenance of the NAAQS, for any 

criteria pollutant or its precursors, 

allocated to highway and transit vehicle 

use and emissions (40 CFR 93.101).’’ 

Under the conformity rule, LMP areas 

may demonstrate conformity without a 

regional emission analysis (40 CFR 

93.109(e)). However, because LMP areas 

are still maintenance areas, certain 

aspects of transportation conformity 

determinations still will be required for 

transportation plans, programs, and 

projects. Specifically, for such 

determination, RTPs, TIPs, and 

transportation projects still will have to 

demonstrate that they are fiscally 

constrained (40 CFR 93.108), meet the 

criteria for consultation (40 CFR 93.105 

and 93.112) and transportation control 

measure implementation in the 

conformity rule provisions (40 CFR 

93.113). 

Additionally, conformity 

determinations for RTPs and TIPs must 

be determined no less frequently than 

every four years, and conformity of 

transportation plan and TIP 

amendments and transportation projects 

is demonstrated in accordance with the 

timing requirements specified in 40 CFR 

93.104. In addition, for projects to be 

approved, they must come from a 

currently conforming RTP and TIP (40 

CFR 93.114 and 93.115). The Clearfield/ 

Indiana Area remains under the 

obligation to meet the applicable 

conformity requirements for the 1997 

ozone NAAQS. 

III. Proposed Action 

EPA’s review of PADEP’s February 27, 

2020 submittal indicates that it meets all 

applicable CAA requirements, 

specifically the requirements of CAA 

section 175A. EPA is proposing to 

approve the second maintenance plan 

for the Clearfield/Indiana Area as a 

revision to the Pennsylvania SIP. EPA is 

soliciting public comments on the 

issues discussed in this document. 


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8734 Federal Register / Vol. 86, No. 25 / Tuesday, February 9, 2021 / Proposed Rules 

These comments will be considered 

before taking final action. 

IV. 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, 

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 proposed 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); 

• Is not an Executive Order 13771 (82 

FR 9339, February 2, 2017) regulatory 

action because it is not a significant 

regulatory action under Executive Order 

12866. 

• 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 CAA; and 

• Does not provide 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, this proposed 

rulemaking, proposing approval of 

Pennsylvania’s second maintenance 

plan for the Clearfield/Indiana Area, 

does not have tribal implications as 

specified by Executive Order 13175 (65 

FR 67249, November 9, 2000), because 

the SIP is not approved to apply in 

Indian country located in the State, and 

EPA notes that it will not impose 

substantial direct costs on tribal 

governments or preempt tribal law. 

List of Subjects in 40 CFR Part 52 

Environmental protection, Air 

pollution control, Incorporation by 

reference, Nitrogen dioxide, Ozone, 

Volatile organic compounds. 

Dated: February 3, 2021. 

Diana Esher, 

Acting Regional Administrator, Region III. 

[FR Doc. 2021–02582 Filed 2–8–21; 8:45 am] 

BILLING CODE 6560–50–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

40 CFR Part 52 

[EPA–R03–OAR–2020–0489; FRL10018–20– 

Region 3] 

Approval and Promulgation of Air 

Quality Implementation Plans; District 

of Columbia; Nonattainment New 

Source Review Requirements for 2015 

8-Hour Ozone Standard 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Proposed rule. 

SUMMARY: The Environmental Protection 

Agency (EPA) is proposing to approve a 

state implementation plan (SIP) revision 

submitted by the Department of Energy 

and Environment (DOEE) of the District 

of Columbia. This SIP revision will 

fulfill the District of Columbia’s 

Nonattainment New Source Review 

(NNSR) SIP element requirement for the 

2015 8-hour ozone National Ambient 

Air Quality Standard (NAAQS). This 

action is being taken under the Clean 

Air Act (CAA). 

DATES: Written comments must be 

received on or before March 11, 2021. 

ADDRESSES: Submit your comments, 

identified by Docket ID No. EPA–R03– 

OAR–2020–0489 at https://

www.regulations.gov, or via email to 

Opila.MaryCate@epa.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. For either manner of 

submission, 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. 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. 

FOR FURTHER INFORMATION CONTACT: 

Matthew Willson, Permits Branch 

(3AD10), Air & Radiation Division, U.S. 

Environmental Protection Agency, 

Region III, 1650 Arch Street, 

Philadelphia, Pennsylvania 19103. The 

telephone number is (215) 814–5795. 

Mr. Willson can also be reached via 

electronic mail at Willson.Matthew@

epa.gov. 

SUPPLEMENTARY INFORMATION: On May 5, 

2020, the DOEE submitted on behalf of 

the District of Columbia (District) a 

formal SIP revision, requesting EPA’s 

approval of its NNSR Certification for 

the 2015 8-hour ozone NAAQS. The 

District is certifying that its existing 

NNSR program, covering the District 

portion of the Washington, DC-MD-VA 

Nonattainment Area (Washington Area) 

for the 2015 8-hour ozone NAAQS, is at 

least as stringent as the requirements at 

40 Code of Federal Regulations (CFR) 

51.165, as amended by the final rule 

titled ‘‘Implementation of the 2015 

National Ambient Air Quality Standards 

for Ozone: Nonattainment Area State 

Implementation Plan Requirements’’ 

(SIP Requirements Rule), for ozone and 

its precursors. See 83 FR 62998 

(December 6, 2018). 

I. Background 

On October 1, 2015, EPA promulgated 

a revised 8-hour ozone NAAQS of 0.070 

parts per million (ppm). 80 FR 65292 

(October 26, 2015). Under EPA’s 

regulations at 40 CFR 50.19, the 2015 

8-hour ozone NAAQS is attained when 

the three-year average of the annual 

fourth-highest daily maximum 8-hour 

average ambient air quality ozone 


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