Technical Support Document (TSD) for the

Redesignation Request and Maintenance Plan

 For the West Virginia Portion of the 

 Steubenville-Weirton, OH-WV

 1997 PM2.5 Nonattainment Area

Submitted April 2012 by the West Virginia 

Department of Environmental Protection 

TSD Prepared August 2012 by

Jessica L. Fry

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)

_______8/24/2012__________

Date Signed
I. Introduction

The purpose of this document is to provide a technical summary of the Office of 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 Steubenville-Weirton, OHWV 1997 PM2.5 Nonattainment Area by the West Virginia Department of the Environment 

(WVDEP). This review does not determine the approvability of the redesignation request or 

maintenance plan. In a maintenance plan, the emissions inventories are used 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 PM2.5 emissions (including condensibles), SO2 and 

NOx . WVDEP did not include VOC and NH3 emissions having determined them to be 

insignificant for the purpose of this submittal. This section will discuss the 2008 Attainment 

Year Inventory that was used in the Steubenville-Weirton Redesignation Request and 

Maintenance Plan submitted by WVDEP.

WVDEP compiled emissions inventories for the West Virginia portion of the 

Steubenville-Weirton Nonattainment Area. The West Virginia portion of the nonattainment area 

consists of Brooke and Hancock Counties. 

The 2008 point source inventory contained emissions for non-electric generating units 

(EGU) sources in Brooke and Hancock Counties. There are no EGU sources in Brooke or 

Hancock County. EPA guidance for emissions inventory development provides that actual 

emissions should be used for purposes of the base year inventory. WVDEP 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 v1.5 

were moved to the non-road data category.
For 2008 Non-road 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. 

The 2008 Onroad 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. 

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. 

For Non-EGU Point source emissions, inventories for 2015 and 2022 were grown from 

the 2008 inventory using Workforce West Virginia economic forecasts. There are no EGUs 

located in the WV portion of the Steubenville-Weirton, OH-WV area.

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 emissions data. WVDEP compiled and 

associated Workforce WV’s growth factors with North American Industrial Classification 

System codes with WVDEP’s Source Classification Codes. Calculations were made and final 

estimates reflected both positive and negative growth.

Non-road source emissions for 2015 and 2022 were developed using monthly 

NONROAD model runs and summarizations of monthly data to obtain annual data values. 

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 previously 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.