SUBJECT: 

FROM: 

TO: 

THRU: 

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

REGION III 

. 1650 Arch Street 

Philadelphia, Maryland 19103 

Technical Support Document (TSD)- Adequacy Findings for the Motor Vehicle 

Emissions Budgets (MVEBs) in the 1997 Fine Particulate Matter (PM2.s) National 

Ambient Air Quality Standard (NAAQS) Maintenance Plan for the York County, 

Pennsylvania (PA) 1997 PMz.s Nonattainment Area 

Gregory Becoat 7hh Office of Air Program Planning (3AP30) 

Administrative Record for the Adequacy Findings for the Motor Vehicle 

Emissions Budgets (MVEBs) in the 1997 Fine Particulate Matter (PMz.s) National 

Ambient Air Quality Standard (NAAQS) Maintenance Plan for the York County, 

Pennsylvania (P A) 1997 PMz.s Nonattainment Area 

& ''"' ~ 9/sj;, Cristina F emandez, Associate Director 

Office of Air Program Planning (3AP30) 

I. Background 

On January 5, 2005 (70 FR 944, 1014), the Environmental Protection Agency (EPA) published 

air quality area designations for the 1997 PM2.s NAAQS. In that rulemaking action, EPA 

designated York County, PA (the Area), which consists ofYork County, as nonattainment for the 

1997 annual PMz.s standard. On September 25,2009 (74 FR 48863), EPA determined that the 

Area had attained the 1997 PMz.s NAAQS based on quality-assured, quality:controlled and 

certified ambient air monitoring data that show the Area has monitored attainment based on 2006 

through 2008 data. 

II. Transportation Conformity Requirements 

Transportation conformity is required under section 176(c) of the Clean Air Act (CAA) to ensure 

that federally supported highway, transit projects, and other activities are consistent with 

(conform to) the purpose of the State Implementation Plan (SIP). The CAA requires federal 

actions in nonattainment and maintenance areas to "conform to" the goals of SIP. This means 

that such actions will not cause or contribute to violations of a NAAQS; worsen the severity of 
an existing violation; or delay timely attainment of any NAAQS or any interim milestone. 

Actions involving Federal Highway Administration (FHWA) or Federal Transit Administration 

(PTA) funding or approval are subject to the Transportation Conformity Rule (40 CPR part 93, 

subpart A). Under this rule, metropolitan planning organizations (MPOs) in nonattainment and 

maintenance areas coordinate with state air quality and transportation agencies, EPA, FHW A, 

and FT A to demonstrate that their metropolitan transportation plans and transportation 

improvement plans (TIPs) conform to applicable SIPs. This is typically determined by showing 

that estimated emissions from existing and planned highway and transit systems are less than or 

equal to the MVEBs contained in a SIP. 

For MVEBs to be approvable, they must meet, at a minimum, EPA's adequacy criteria found at 

40 CPR 93.118(e)(4). EPA's adequacy criteria are:· (1) the submitted control strategy 

implementation plan was endorsed by the Governor or designee and was subject to a State public 

hearing; (2) consultation among Federal, State, and local agencies occurred; full implementation 

plan documentation was provided to EPA; and EPA's stated concerns, if any, were addressed 

before the control strategy implementation plan was submitted; (3) the MVEBs are clearly 

identified and precisely quantified; (4) the MVEBs, when considered together with all other 

emissions sources, are consistent with applicable requirements for maintenance; (5) the MVEBs 

are consistent with and clearly related to the emissions inventory and the control measures in the 

submitted control strategy implementation plan; and (6) revisions to previously submitted 

maintenance plans explain and document any changes to previously submitted budgets and 

control measures; impacts on point and area source emissions; any changes to established safety 

margins; and reasons for the changes (including the basis for any changes related to emission 

factors or estimates of vehicle miles traveled). 

III. Review of the Submitted Modeling Utilizing the Motor Vehicle Emission Simulator 

(MOVES2010) 

Pennsylvania Department ofEnvironmental Protection (PADEP) utilized MOVES2010a to 

produce MVEBs for years 2017 and 2025. To utilize the MOVES2010a model, several different 

models were used to provide the necessary inputs into MOVES2010a. One ofthe models, 

PPSUITE, was utilized to provide inputs as well as to post-process the output files from 

MOVES2010a. 

The appropriate traffic related inputs which were processed by PPSUITE were input into 

MOVES2010a. Additional traffic related inputs as well as non-traffic related inputs were 

provided as well. The data was input into MOVES2010a via the county data manager. The 

county data manager is a function of the MOVES2010a model which allows county specific data 

inputs to be converted into a usable form by MOVES2010a. At that point a Run Specification 

(RunSpec), which is a function ofMOVES2010a that allows the user to input necessary 

parameters into the model, was created and run in batch mode. The outputs were provided as an 

inventory because vehicle miles traveled (VMT) and vehicle population were provided to 

MOVES2010a. 

EPA reviewed the modeling methodology utilized by P ADEP and all modeling related 

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information to produce the MVEBs for years 201 7 and 2025. EPA found that all necessary and 

required modeling procedures were followed in the production of the 20 17 and 2025 MVEBs 

which were produced using MOVES2010a. 

IV. Administrative Requirements for Making Adequacy Findings 

EPA followed the process for determining the adequacy of the submitted SIP MVEBs in 

accordance with the procedures listed in the January 2008 Conformity Regulations contained in 

40 CFR part 93, 118(f) "Adequacy review process for implementation plan submissions." EPA 

will be issuing a notice of proposed rulemaking (NPR) for a 30-day public comment period 

soliciting public comment for the approvability of the Commonwealth of Pennsylvania's SIP 

submission. The NPR also proposes approval of the MVEBs for milestone year 201 7 and the 

out-year 2025 for the York County, PA 1997 PM2.s Nonattainment Area for PM2.s and nitrogen 

oxides (NOx). 

Shown in Table 1 are the budgets from the York County, PA Maintenance Plan. The MVEBs in 

Table 1 for milestone year 2017 and the out-year 2025 for PM2.s and NOx will be applied to all 

future transportation conformity determinations and analyses for the 1997 annual PM2.s NAAQS. 

Table 1. On-Road MVEBs Contained in the York County, PA 1997 PM2.s 

Nonattainment Area Maintenance Plan for the 1997 PM2.sNAAQS 

Year Motor Vehicle Emissions Mobile Vehicle Emissions 

Budget for PM2.s On-Road Budget for NOxOn-Road 

Emissions (tons per year) Emissions (tons per year) 

2017 192 5,390 

2025 144 3,398 

V. Evaluation of the Adequacy of the MVEBs in the York County, PA Maintenance Plan 

for the 1997 PM2.s NAAQS 

In this TSD, EPA is evaluating the MVEBs associated with the York County, PA Maintenance 

Plan for conformity purposes. EPA is using the evaluation criteria detailed in the Transportation 

Conformity Rule, 40 CFR part 93.102(b)(2)(v), 93.1 02(b)(2)(v), 93.102(b)(3), and part 93, 

93 .118( e )4 through 93 .118( e )5. The evaluation is presented in Table 2, below. 

Table 2. Adequacy of the MVEBs Contained in the York County, PA Maintenance Plan 

for the 1997 PM2.5 NAAQS 

Transportation Conformity Review Criteria Was the Criterion Satisfied? 

Rule If Yes How was this Criteria 

40 CFR Part 93, 93.118 Satisfied? 

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93.1 02(b )(2)(iv) Have EPA and the Neither EPA nor the 

Commonwealth made a Commonwealth have made 

finding that N Ox is an such a finding. 

insignificant contributor to 

the direct mobile PM 

emissions? 

93.1 02(b )(2)(v) Has EPA or the Neither EPA nor the 

Commonwealth made a Commonwealth have made 

finding that volatile organic any findings that VOCs, SOx, 

compounds (VOCs), Sulfur or NH3 are significant 

Oxides (SOx) or Ammonia contributors to the PM2.s 

(NH3) as precursors to be a mobile emissions. 

significant contributor to the 

mobile PM2.s emissions? 

93.1 02(b )(3) Has the EPA or the Neither EPA nor the 

Commonwealth made a Commonwealth have made 

finding that re-entrained road such a finding. 

dust is a significant 

contributor to the PM mobile 

emissions? 

Sec. 93.118(e)(4)(i) Was the submitted revised Yes. The York County, PA 

plan endorsed by the Maintenance Plan was 

Governor (or his or her endorsed and submitted as a 

designee) and subject to a SIP revision by the 

Commonwealth public Governor's designee, the 

hearing? Secretary of Pennsylvania 

Department of Environmental 

Protection, E. Christopher 

Abruzzo. A public hearing 

on the SIP proposal 

scheduled for February 26, 

2014, was cancelled because 

no one expressed interest in 

presenting testimony or 

attending the hearing. 

Sec. 93.118(e)(4)(ii) Before the maintenance plan Yes. Consultation has 

was submitted to EPA, did occurred among all required 

consultation between federal, federal, State and local 

State and local agencies agencies. 

occur; was full 

implementation plan 

documentation provided to 

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EPA, and was EPA's stated 

concerns, if any, addressed? 

Sec. 93 .118( e)( 4 )(iii) Was the motor vehicle Yes, the budgets are clearly 

emissions budget(s) clearly identified on pages 31-32 of 

identified and precisely the York County, PA 

quantified? Maintenance Plan prepared 

by the Pennsylvania 

Department of Environmental 

Protection. 

Sec. 93.118(e)(4)(iv) Is the motor vehicle EPA believes the budgets can 

emissions budget(s), when be declared adequate because 

considered together with all in conjunction with the other 

other emission reductions, emission reductions, they 

consistent with applicable demonstrate continued 

requirements for maintenance for years 2017 

maintenance? and 2025. 

Sec. 93.118(e)(4)(v) Is the motor vehicle EPA believes that the budgets 

emissions budget(s) are clearly related to the 

consistent with and clearly emissions inventory and the 

related to the emissions control measures in the SIP 

inventory and the control submittal. 

measures in the Plan? 

Sec. 93.118(e)(4)(vi) Revisions to previously Yes, the York County, PA 

submitted attainment Maintenance Plan provides 

demonstrations: explain and new MVEBs for years 2017 

document any changes to and 2025 for PM2.s and NOx. 

previously submitted budgets The addition of safety 

and control measures; margins to the MVEBs is 

impacts on point and area consistent with continued 

source emtsstons; any attainment. 

changes to established safety 

margins (see Sec. 93.101 for 

definition); and reasons for 

the changes (including the 

basis for any changes related 

to emission factors or 

estimates of vehicle miles 

traveled). 

Sec. 93.118(e)(5) Did they provide and we Yes 

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reviewed public comments 

and the Commonwealth's 

responses to those comments 

with the submitted control 

strategy SIP? 

VI. Findings 

Based upon our review and evaluation of the MVEBs contained in the Maintenance Plan for the 

York County, PA 1997 PMz.sNAAQS Nonattainment Area, EPA finds the MVEBs adequate for 

conformity purposes and recommends that the MVEBs be SIP approved. 

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