Technical Support Document (TSD) for the 

Redesignation Request and Maintenance Plan 

of the West Virginia Portion 

Of the Parkersbmg-Madetta, WV-OH 

1997 PM2.s Nonattainment Area 

Submitted March 2012 by the West Virginia 

Department of Environmental Protection 

TSD Prepared May 2012 by 

Alice H. Chow 

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 Air Monitoring and Analysis (3AP40) 
·. 
I. Introduction 

The purpose of this document is to provide a technical summary of the Office if Air Monitoring 

and Analysis (OAMA) review of the emissions inventories submitted with the Redesignation 

Request and Maintenance Plan for the West Virginia Portion of the Parkersburg-Marietta, WVOH 1997 PM2.5 Nonattainment Area by the West Virginia Depa1iment ofthe Environment 

(WVDEP). This review does not determine the approvability of the 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 show that the 

area will remain in attainment. Any questions pertaining to this technical summary should be 

directed to Walter Wilkie, Associate Director, Office of Air Monitoring and Analysis, at 215-

814-2150 or via email at wilkie.walter@epa.gov. 

II. Emissions Inventories for Maintenance Plan 

2008 Attainment Year Inventory and Maintenance Plan Base Year Inventory 

The inventory used for the year of attainment is called the Attainment Year Inventory 

and also is referred to as the Maintenance Plan Base Year Inventory. This inventory is used as 

the basis for the projected inventories that are used to show the 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 Virginia portion of the 

Parkersburg-Marietta Nonattainment Area. The West Virginia portion of the nonattainment area 

consists of Wood 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 of Pleasants 

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 of the base 

year inventory. WVDE.P used WV Department of Air 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 of the work in 

developing the inventory involved realigning the EGUs and Non-EGUs from the 2008 dataset 

submitted to the NEI with the CAMD dataset. 

For the 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 
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Pleasants County, WVDEP used county data apportioned by population, of which the population 

of the Grant Tax District as 22.29% of the population of Pleasants 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 of the 

NONROAD model, they were calculated separately outside of the NONROAD model. To 

calculate values for the Grant Tax District in Pleasants County, WVDEP used county data 

apportioned by population, of which the population of the Grant Tax District as 22.29% of the 

population of Pleasants County. 

The 2008 Omoad Mobile source inventory was developed using the most current version 

of EPA'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 with the Ohio Environmental Protection Agency 

and WVDEP, with additional data provided by Ohio EPA, West Virginia Department of 

Transportation (WVDOT), and WVDEP. Since the Grant Tax District 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 staff reviewed the files and the emission results provided by WVDEP and found 

them to be acceptable. 

2015 and 2022 Projection Emission Inventories 

Projection inventories are used to show that the area will remain in attainment. WVDEP 

used 2015 and 2022 emission projections 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 data provided with this platform is generally representative of several years around 

2012 and 2014 such as 2015\2020 and 2030 were used. WVDEP compiled Point source EGUs 

from EPA's CSAPR inventories 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. For Non-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, Non EGUs included Cytec, but Cabot was 

shutdown in 2008 and therefore was not included. 

1 Posted June 29,2011, 2014 Emissions Data Files, 

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 of various 

categories and a wider range of years, 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 data to obtain annual data. MAR emissions for 2015 and 

2022 were based on the 2008 inventory using Workforce WV economic forecasts. The same 

methodology was used to project MAR emissions as was discussed for Nonpoint sources. 

Onroad mobile projection emissions for 2015 and 2022 were calculated from 

MOVES2010a produced emission factors as performed by the Ohio Department of 

Transportation. 

OAMA staff reviewed the methodologies provided by WVDEP and found them to be 

acceptable.