### ·. UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION III 1650 Arch Street Philadelphia, Pennsylvania 19103

SUBJECT: Technical Support Document (TSD)- Review ofthe On-Road Portion ofthe 2011 Base Year Inventories for the Pennsylvania Portion ofthe Following Five 2008 8- Hour Ozone National Ambient Air Quality Standard (NAAQS) Nonattainment Areas: Allentown-Bethlehem-Easton, Lancaster, Philadelphia-Wilmington-Atlantic City, Pittsburgh-Beaver Valley, and Reading FROM: Asrah Khadr, Environmental Engineer, EIT 

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### ~**~ 1-.21-1~**  Crfstfna Fernandez Associate Director Office ofAir Program Planning (3AP30)

I. Background This TSD documents the review ofthe on-road portion ofthe 2011 base year inventories for the aforementioned five 2008 8-hour ozone NAAQS nonattainment areas. For additional information about this action, please refer to the notice ofproposed rulemaking (NPR) and direct final rulemaking notice (DFRN) in this docket.

II. Review of the Submitted Modeling Utilizing the Motor Vehicle Emission Simulator {MOVES2010b) To evaluate the submitted motor vehicle emissions inventory, it was necessary to review the supporting modeling completed using MOVES2010b. The submitted files include run specifications (RunSpecs) describing the scenario parameters, input databases containing local fleet data, and an output database containing the modeling results. The submitted RunSpecs, input databases, and output databases were reviewed against the EPA document: Technical Guidance on the use of MO VES2010 for Emission Inventory Preparation in State Implementation Plans and Transportation Conformity. This document provides guidance on the use ofthe MOVES model to develop inventories for SIPs as well as analysis ofemissions for transportation conformity determinations. EPA carefully reviewed the RunSpecs, input databases, and output databases used in the analyses to ensure they were completed consistent with the recommendations outlined in the above mentioned MOVES Technical Guidance and are appropriately representative ofthe 1modeling domain and analysis year. Table 1 presents a summary ofthe review ofthe RunSpecs and the selections made for each parameter
. Table 2 presents a summary ofthe review ofeach MOVES input parameter from the submittal. Table 3 presents a summary ofthe review ofthe output and post-processing methodology. The RunSpecs, input databases, and output databases were reviewed and found to have followed the applicable EPA guidance provided in the Technical Guidance on the use ofMOVES2010for Emission Inventory Preparation in State Implementation

. Plans and Transportation Conformity

. Additionally, sufficient documentation was provided to support the data, decisions, and assumptions made for each parameter.

Table 1. Review of RunSpees for year 2011 for the Five 8-Hour Ozone NAAQS Nonattainment Areas Domain/Scale County scale was selected

- allowing for appropriate detail necessary for regulatory analysis. Time Spans Panel Hourly time aggregation was selected. All appropriate months, days, and hours were selected. The appropriate year was selected for the scenario being modeled. Geographic Bounds The appropriate county was selected

. Vehicles/Equipment Gasoline, ethanol , diesel, and compressed natural gas (CNG) fuels were selected. All source types were selected. Road Type All road types were selected. Pollutants and Processes Nitrogen oxides (NOx) and volatile organic compounds (VOCs) were selected. All processes were included in the analysis.

Table 2. Review of MOVES input databases for year 2011 for the Five 8-Hour Ozone NAAQS Nonattainment Areas Parameter Submittal Age Distribution All source types were included with fractions for ages (0

-30 years). Average Speed Average speed distributions were provided for all source types , for Distribution each combination ofroad type and hour ofthe day. Fuel (fuel formulation, 

# • A complete fuel supply table was provided with all fuel types fuel supply, fuel usage, present in the region

. andAVFT) 

## • Appropriate fuel properties were included in the fuel formulation table, including Reid Vapor Pressure (RVP) , ethanol content, and sulfur levels. 

## • The fuel usage table was provided and described the ethanol use by E-85 capable vehicles

. 

## • The alternative vehicles and fuel technologies (A VFT) table was provided. 

## • Any and all changes to the default fuels have been sufficiently documented. Meteorology Data Local meteorology data (tem p erature and humidity) was provided for 2each hour ofthe day for each month

. Ramp Fraction Local fractions oframp driving times were provided for restricted access roadways. Road Type Distribution The vehicle miles traveled (VMT) fraction for each road type was provided for each source type and road type. Source Type The number ofvehicles ofeach source type was provided. Population 

# • Annual VMT was provided for the five MOVES highway performance management system (HPMS) vehicle categories. Vehicle Type VMT 

## • Monthly VMT fractions were provided for all source types (includes inputs for and month. annual VMT, daily 

## • Daily VMT fractions were provided for all days and source VMT fraction, hourly types. VMT fraction, and 

## • Hourly VMT fractions were provided for each day type and monthly VMT fraction) source type. Hotelling The hotelling activity (auxiliary power unit (APU) use vs extended · idle vs. engine oft)_ was described for all model years . Inspection/Maintenance (IIM) Programs The existing IIM program was accurately described.



### Table 3. Review of the output database and post-processing steps for year 2011 for the Five 8-Hour Ozone NAAQS Nonattainment Areas MOVESrun table Appropriate version ofMOVES was used. All calculation


### . bundles were processed

. MOVES error table No errors were produced in any of the runs. MOVESoutput The output contains emission results for all necessary source types, processes, and pollutants. Output processing The output was appropriately summed to generate the emissions inventory. The methodology was documented.

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