Technical Support Document (TSD) for the RedesignationRequest and Maintenance Plan ofthe West Virginia Portion Ofthe Parkersbmg-Madetta, WV-OH 1997 PM2.sNonattainment Area
SubmittedMarch 2012 by the West Virginia

Department ofEnvironmental Protection TSD PreparedMay 2012 by Alice

### H. Chow Office ofAirMonitoring andAnal ysis, 3AP40 U.S. Environmental Protection Agency, Region 3 1650 Arch Street Philadelphia, Pennsylvania 19103

Reviewed by Walter Wilkie, Associate Director Office ofAirMonitoring andAnalysis (3AP40)

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### I. Introduction The purpose ofthis document is to provide a technical summary ofthe Office ifAir Monitoring and Analysis (OAMA) review ofthe emissions inventories submitted with the Redesignation Request and Maintenance Plan for the West Virginia Portion ofthe Parkersburg-Marietta, WVOH 1997 PM2 .5 Nonattainment Area bythe West Virginia Depa1iment ofthe Environment (WVDEP). This review does not determine the approvability ofthe redesignation request or maintenance plan. In a maintenance plan, the emissions inventories are use to reflect the emissions during the time the area came into attainment and are then projected to showthat the area will remain in attainment. Any questions pertaining to this technical summary should be directed to Walter Wilkie, Associate Director, Office ofAir Monitoring and Analysis, at 215- 814-2150 or via email at wilkie.walter@epa.gov. 

### II. Emissions Inventories for Maintenance Plan 2008Attainment YearInventory andMaintenancePlan Base YearInventory The inventory used for the year ofattainment is called the Attainment Year Inventory and also is referred to as the Maintenance PlanBase Year Inventory. This inventory is used as the basis for the projected inventories that are used to showthe area will remain in attainment. The base year inventory contains primary PM2.s emissions (including condensibles), S02 and NOx. WVDEP did not include VOC and NH3 emissions having determined them to be insignificant. This section will discuss the 2008 Attainment Year Inventory that was used in the Parkersburg-Marietta Redesignation Request and Maintenance Plan submitted by WVDEP. WVDEP compiled emissions inventories for the West Virginiaportion ofthe Parkersburg-MariettaNonattainment Area. The West Virginiaportion ofthe nonattainment area consists ofWood County and the Grant Tax District ofPleasants County. The 2008 point source inventory contained emissions for electric generating units (EGUs) and Non-EGU sources in Wood County. For the Grant Tax District ofPleasants County, EGUs Pleasants and Willow Island Power Stations and Pleasants Energy, and the NonEGU Cabot and Cytec plants are included in the**inventory~** EPA guidance for emissions inventory development provides that actual emissions should be used for purposes ofthe base year inventory. WVDE.P used WV Department ofAir Quality's (DAQ) 2008 annual emissions inventory submitted to EPA's National Emissions Inventory (NEI) database and EPA's Clean Air Markets Division (CAMD) database to compile their inventory. Much ofthe work in developing the inventory involved realigning the EGUs and Non-EGUs from the 2008 dataset submitted to the NEI with the CAMD dataset. Forthe 2008 Nonpoint emissions, WVDEP used 2008 NEI v1.5 data developed by the EPA. Commercial marine vessels and locomotive emissions contained in the 2008 NEI vl.5 were moved to the nonroad data category. To calculate values for the Grant Tax District in-·fPleasants County, WVDEP used county data apportioned by population, ofwhich the population ofthe Grant Tax District as 22.29% ofthe population ofPleasants County. For 2008 Nomoad mobile sources, WVDEP generated the emissions using EPA's NONROAD model. Since marine, air and rail/locomotive (MAR) emissions are not part ofthe NONROAD model, they were calculated separately outside ofthe NONROAD model. To calculate values for the Grant Tax District in Pleasants County, WVDEP used county data apportioned by population, ofwhich the population ofthe Grant Tax District as 22.29% ofthe population ofPleasants County. The 2008 Omoad Mobile source inventory was developed using the most current version ofEPA's highway mobile source emissions model MOVES2010a. The Ohio Department of Transportation (ODOT) and the Wood-Washington-Wirt Interstate Planning Commission (WWW) performed the analysis in coordination withthe Ohio Environmental Protection Agency and WVDEP, with additional data provided by Ohio EPA, West Virginia Department of Transportation (WVDOT), and WVDEP. Since the Grant TaxDistrict in Pleasant County is**cons~dered** a "doughnut area" (outside the modeled domain, but within the nonattainment area) for planning purposes and its roadways are not included in the travel demand model network, the modeling area's growth factor was used to calculate future year vehicle miles traveled (VMT) in this area by functional class. OAMA staffreviewed the files and the emission results providedby WVDEP and found themto be acceptable.


### 2015 and2022 Projection Emission Inventories Projection inventories are used to showthatthe area will remain in attainment. WVDEP used 2015 and 2022 emissionprojections for the interim and maintenance plan end year, respectively. WVDEP used EPA's Integrated Planning Model (IPM) projections to support the Cross State Air Pollution Rule (CSAPR). IPM projections of2014 (released as 2014, the projected future year dataprovided with this platform is generally representative ofseveral years around 2012 and 2014 such as 2015\2020 and 2030 were used. WVDEP compiled Point source EGUs from EPA's CSAPRinventories of2015 and 2022 was interpolated between 2020 and 2030 inventories. For the Grant Tax District in Pleasants County, EGUs included Pleasants and Willow Island Power Stations and Pleasants Energy. ForNon-EGU emissions, inventories for 2015 and 2022 were grown from the 2008 inventory using Workforce West Virginia economic forecasts. For the Grant Tax District in Pleasants County, NonEGUs included Cytec, but Cabot was shutdown in 2008 and therefore was not included.

1 Posted June 29,2011, 2014 Emissions DataFiles, ftp:/ /ftp.epa
.gov/Emislnventory/2005v4_2/2014emis/ readme

_2005v4

_2

_CAP_BAFM

_HAPs_inventories_2014_inp uts.txt, I

. . 'Nonpoint source emissions for 2015 and 2022 were based on the 2008 inventory using Workforce West Virginia economic forecasts. The Workforce WV projections were selected because their projections were based more on local data, provided more coverage ofvarious categories and a wider range ofyears, based on 2008. WVDEP compiled and associated Workforce WV's growth factors with North American Industrial Classification System (NAICS) codes with WVDEP's Source Classification Codes (SCCs). Calculations were made and final estimates reflected both positive and negative growth. Nonroad source emissions for 2015 and 2022 were developed using monthly NOROAD model runs and summing the monthly datato obtain annual data. MAR emissions for 2015 and 2022 were based onthe 2008 inventory using Workforce WV economic forecasts. The same methodology was usedto project MARemissions as was discussed for Nonpoint sources. Onroad mobile projection emissions for 2015 and 2022 were calculated from MOVES2010aproduced emission factors as performedby the Ohio Department of Transportation. OAMA staffreviewed the methodologies providedby WVDEP and found themto be acceptable.