Technical Support Document (TSD) Parkersburg West Virginia 


PM2.5 State Implementation Plan (SIP) Base Year Inventory 


Submitted September 2008 by the West Virginia 


Department ofEnvironmental Protection 


TSD Prepared April 2010 by 


Janet C. Kremer 


Office of Air Monitoring and Analysis, 3AP40 


U.S. Environmental Protection Agency, Region 3 


1650 Arch Street 


Philadelphia, Pennsylvania 19103 


Reviewed by Walter Wilkie, Associate Director 


Office of onitoring and Analysis, 3AP40 


J~ Ib , '2..010 

Date Signed 
II 

I. Introduction 

The purpose of this document is to provide a technical summary of the 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 

approvability of the SIP Base Year Inventory 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 the benclunark for other SIP 

planning activities, such as the establislunent of an emissions reduction credit program. 

On January S, 200S the Parkersburg area, comprised of Wood County and the Grant Tax 

District in Pleasants County was designated as nonattainment for the PM2.S NAAQS. 

Any questions pertaining to this technical summary should be directed to Walter K. 

Wilkie, Associate Director, Office ofAir Monitoring 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 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, on-road mobile sources, and non-road mobile sources. For the 

PM2.S NAAQS, the pollutants to be inventoried are PM 10, PM2.S, VOC, NOx, S02 and 

NH3. For the NAAQS, emissions should be reported 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 

Virginia portion ofthe Parkersburg Non Attainment area. For Non-EGUs is the same 

data WVDEP supplied to the EPA's National Emissions Inventory (NEI) for the 2002 

periodic inventory requirement. West Virginia collected only filterable PM emissions that 

were augmented 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 FueVWood 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 non-road mobile source inventory 

used in this request. First the emissions for the non-road source categories that are 

included in EPA's NONROAD200S Model (NONROAD) were developed. NONROAD 

estimates fuel consumption and emissions of total hydrocarbons, carbon monoxide, 

nitrogen oxides, sulfur dioxide, and particulate matter for all non-road mobile source 

I "Emissions Inventory Guidance for Implementation ofOzone and Particulate Matter National Ambient 

Air Quality Standards (NAAQS) and Regional Haze Regulations" EPA-4541R-05-001, August 2005 
categories except for aircraft, locomotives, and commercial marine vessels (CMV). 

WVDEP provided sample input and output files for the NONROAD model that reflected 

the use of the most up to date information. 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.B. Pechan and Associates for VISTAS. OAMA staff reviewed the 

documentation provided concerning this portion of the 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 annually by SCC. 

OAMA staff reviewed the results, procedures, and methodologies for the SIP base 

. year, and found them to be approvable.