Technical Support Document (TSD) Parkersburg West Virginia PM2

.5 State Implementation Plan (SIP) Base Year Inventory
Submitted September 2008 bythe West Virginia Department ofEnvironmental Protection TSD Prepared April 2010 by Janet C

. Kremer Office ofAirMonitoring and Analysis, 3AP40 U.S. Environmental Protection Agency, Region 3 1650 Arch Street Philadelphia, Pennsylvania 19103

ReviewedbyWalterWilkie, Associate Director Office of**onitoring** and Analysis, 3AP40

## J~ Ib , '2..010 Date Signed

### II I. Introduction The purpose ofthis document is to provide a technical summary ofthe Office ofAir Monitoring and Analysis (OAMA) review ofthe Base Year emissions inventories submitted with the Parkersburg, West Virginia PM2.S SIP by the West Virginia Department ofthe Environmental Protection (WVDEP). This review determines the approvabilityofthe SIP Base YearInventory and an evaluation ofthe methods used for projection year inventories. A SIP Base Year Inventory is the starting point from which other SIP inventories are derived as well as serving as thebenclunark for other SIP planning activities, such as the establislunent ofan emissions reduction credit program. On January S, 200S the Parkersburg area, comprised ofWood County and the Grant Tax District in Pleasants Countywas designated as nonattainment for the PM2.S NAAQS. Any questions pertaining to this technical summary shouldbe directed to Walter K. Wilkie, Associate Director, Office ofAirMonitoring and Analysis, at 21S-814-21S0 or via email at wilkie.walter@epa.gov.


### 2002 SIP Base Year Inventory The SIP base year inventory is the primaryinventory from which other inventories (3-year cycle inventories, reasonable further progress inventories, modeling inventories) are derived. The Clean Air Act calls for State, local, and Tribal agencies to ensure that the base year inventory is comprehensive, accurate, and current for all actual emissions.! The base year inventory includes emissions estimates from stationarypoint and nonpoint sources, on-road mobile sources, and non-road mobile sources. Forthe PM2.S NAAQS, the pollutants to be inventoried are PM 10, PM2.S, VOC, NOx, S02 and NH3. Forthe NAAQS, emissions shouldbereported as actual annual emissions. In the Parkersburg SIP the base year used was 2002. WVDEP provided a point source inventory for 2002 that contained emissions for electric generating units (EGUs) and Non-EGU sources. There are no EGU sources in Wood County, which is the West Virginiaportion ofthe ParkersburgNon Attainment area. ForNon-EGUs is the same data WVDEP supplied to the EPA'sNational Emissions Inventory (NEI) for the 2002 periodic inventory requirement. West Virginia collected only filterable PM emissions that were augmented to develop primaryPM estimates. For the 2002 Area source emissions, WVDEP used 2002 NEI data developed by the EPA as the starting point for the area source inventory. West Virginia updated estimates for the Residential FueVWood Combustion categories for coal, distillate oil, natural gas, and wood from the 2002 preliminaryNEI file. NH3 emissions estimates were calculated using the Carnegie Mellon UniversityNH3 model. WVDEP used a two step process to develop the non-road mobile source inventory used in this request. First the emissions for the non-road source categories that are included in EPA'sNONROAD200S Model (NONROAD) were developed. NONROAD estimates fuel consumption and emissions oftotal hydrocarbons, carbon monoxide, nitrogen oxides, sulfur dioxide, and particulate matter for all non-road mobile source

I "Emissions Inventory Guidance for Implementation of Ozone andParticulate MatterNationalAmbient Air Quality Standards (NAAQS) andRegionalHaze Regulations" EPA-4541R-05-001, August 2005categories except for aircraft, locomotives, and commercial marine vessels (CMV). WVDEP provided sample input and output files for the NONROAD model that reflected the use ofthe most up to date information. The second step was to develop emissions that were not contained inthe NONROAD Model. Aircraft, locomotives, and commercial marine vessels (CMV) emission estimates submittedbyWVDEP were developed byE.B. Pechan and Associates for VISTAS

. OAMA staffreviewed the documentationprovided concerning this portion ofthe non-road inventory and believes that it is reasonable to use these emission estimates. The MOBILE6 module ofthe SMOKE model was used to develop the on-road mobile source emissions estimates for NOx , NH3, S02, PM, and VOC emissions

. . MOBILE 6.2 defaults were used for the speed, vehicle age and vehicle mix data. The 2002 vehicle miles traveled (VMT) was obtained from the West Virginia Department of Transportation (WVDOT) and provided along with West Virginia-specific temperature data. WVDEP provided Mobile6

.2 input and output files for review

. Mobile emissions values were given annuallyby SCC. OAMA staffreviewed the results, procedures, and methodologies for the SIP base

. year, and found them to be approvable

.