Technical Support Document (TSD) Charleston West Virginia PM2.5 State Implementation Plan (SIP) Base Year Inventory

Submitted November 2009 by the West Virginia Department of Environmental Protection TSD Prepared July 2010 by Alice H. Chow Office of Air Monitoring and Anal ys is, 3AP40 U.S. Environmental Protection Agency , Region 3

1650 Arch Street Philadelphia, Pennsylvania 19103

____________________ /s/

________________________ Reviewed b y Walter Wilkie, Associate Director Office of Air M onitoring and Anal ys is, 3AP40

_______ August 12, 2010

__________ Dat e Signed**I. Introduction**  The purpose of this document is to provide a technical summary of the Office of Air Monitoring and Analy sis (OAMA) review of the Base Year emis sions inventories submitted with the Charleston , West Virginia PM2.5 SIP by the West Virginia Department of the Environmental Protection (WVDEP). This review determines the approvability

of the SIP Base Year Inventory and an ev aluation of the methods used . A SI P Base Year Inventory

is the starting point from which other SIP inventories are derived as well as serving as the benchmark for other SIP planning activities, such as the establishment of an emissions reduction credit program. On January 5, 2005 the Charleston area, comprised of Kanawha and Putnam Counties, was designated as nonattainment for the PM2.5 NAAQS. An y questions pert aining to this technical summary should be directed to Walter K. Wilkie, Associate Director , Office of Air Monitoring and Analy sis, at 215

- 814

- 2150 or via email at wilkie.walter@epa.gov

.

**II 2002 SIP Base Year Inventory**  The SIP base y ear inventory is the primary

inventory

from which other inventories (3

- ye ar cy cle 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 ye ar inventory is comprehensive, accurate, and current for all actual emissions. 1 The base year inventory includes emissions estimates from stationary point and nonpoint sources, onroad mobile sources, and nonroad mobile sources. For the PM2.5 NAAQS, the pollutants to be inventorie d are PM 10, PM2.5, VOC, NOx, SO2 and NH 3 . For the NAAQS, emiss ions should be reported as actual annual emissions. In the Charleston SIP the base y ear used was 2002. WVDEP provided a point source inventory

for 2002 that contained emissions for electric generating units ( EGUs ) and Non

- EGU sources. T here is one EGU source in Kanawha Count y , and one EGU source in Putnam County. F or EGUs and Non

- EGUs WVDEP supplied data to EPA’s National Emissions Inventory (NEI) for 2002 , as required b y the Consolidated Emissions Reporting Rule (CERR)

. West Virginia submitted filtera ble PM emissions that were augmented by

MACTEC for VISTAS t o develop primary PM 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 estim ates for the Residential Fuel/Wood Combustion categories for coal, distillate oil, natural gas, and wood from the 2002 preliminary NEI file. NH3 emissions estimates were calculated using the Carnegie Mellon Universit y NH3 model. WVDEP used a two step pr ocess to develop the Nonroad Mobile source inventory used in this request. First the emissions for the nonroad source categories that are included in EPA’s NONROAD2005 Model (NONROAD) were developed. NONROAD estimates fuel consumption and emissions of to tal hy drocarbons, carbon monoxide, nitrogen oxides, sulfur dioxide, and particulate matter for all nonroad mobile source categories except for aircraft, locomotives, and commercial marine vessels (CMV). The second step was to develop emissions that were n ot contained in the NONROAD Model. Aircraft, locomotives, and commercial marine vessels (CMV) emission estimates

1 “ Emissions Inventory Guidance for Implementation of Ozone and Particulate Matter National Ambient Air Quality Standards (NAAQS) and Regional Haze Regulation s ” EPA

- 454/R

- 05

- 001, August 2005submitted by WVDEP were developed by E.H. Pechan and Associates for VI STAS. OAMA staff reviewed the documentation provided concerning this po rtion of the Nonroad inventory

and believes that it is reasonable to use these emission estimates. The MOBILE6 module of the SMOKE model was used to develop the onroad mobile source emissions estimates for NO x , NH 3 , SO 2 , 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. Mobile emis sions values were given annually by SCC

. AQAB staff reviewed the files and emission results

.