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 Analysis, 3AP40

U.S. Environmental Protection Agency, Region 3

1650 Arch Street

Philadelphia, Pennsylvania 19103

____________________/s/________________________

Reviewed by Walter Wilkie, Associate Director

Office of Air Monitoring and Analysis, 3AP40

_______August 12, 2010__________

Date Signed

        

Introduction

The purpose of this document is to provide a technical summary of the
Office of Air Monitoring and Analysis (OAMA) review of the Base Year
emissions 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 evaluation of the methods used.  A SIP 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. Any questions pertaining to this technical summary should be
directed to Walter K. Wilkie, Associate Director, Office of Air
Monitoring and Analysis, at 215-814-2150 or via email at   HYPERLINK
"mailto:wilkie.walter@epa.gov"  wilkie.walter@epa.gov . 

II 	2002 SIP Base Year Inventory

	The SIP base year inventory is the primary inventory 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
stationary point and nonpoint sources, onroad mobile sources, and
nonroad mobile sources.  For the PM2.5 NAAQS, the pollutants to be
inventoried are PM 10, PM2.5, VOC, NOx, SO2 and NH3.  For the NAAQS,
emissions should be reported as actual annual emissions. 

	In the Charleston 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 is one EGU source in
Kanawha County, and one EGU source in Putnam County.  For EGUs and
Non-EGUs WVDEP supplied data to EPA’s National Emissions Inventory
(NEI) for 2002, as required by the Consolidated Emissions Reporting Rule
(CERR). West Virginia submitted filterable PM emissions that were
augmented by MACTEC for VISTAS to 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 estimates 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 University NH3 model.  

	WVDEP used a two step process 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 total hydrocarbons, 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 not
contained in the NONROAD Model.  Aircraft, locomotives, and commercial
marine vessels (CMV) emission estimates submitted by WVDEP were
developed by E.H. Pechan and Associates for VISTAS.  OAMA staff reviewed
the documentation provided concerning this portion 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 NOx, NH3, SO2, 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 emissions
values were given annually by SCC.  AQAB staff reviewed the files and
emission results.

 

 “Emissions Inventory Guidance for Implementation of Ozone and
Particulate Matter National Ambient Air Quality Standards (NAAQS) and
Regional Haze Regulations” EPA-454/R-05-001, August 2005

