Technical Support Document (TSD)-

Review of Emissions Inventories for the Redesignation Request and Maintenance Plan of the Maryland portion ofthe Martinsburg-Hagerstown, WV-MD

1997 PM2.s N onattainment Area

Submitted on December 23, 2013 by: Maryland Department of the Environment

TSD Prepared on April25, 2014 by: Emlyn Velez-Rosa

Office of Air Program Planning, 3AP30

OnBehalfof

Office of Air Monitoring and Analysis, 3AP40

U.S. Environmental Protection Agency, Region 3

1650 Arch Street Philadelphia, Pennsylvania 19103

ReViewed by Alice H. Chow, Associate Director

Office of Air Monitoring and Analysis (3AP40)

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ate slgned1 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 Maryland portion of the MartinsburgHagerstown, WV-MD nonattainment area (“the Martinsburg Area” or “the Area”) for the 1997 annual fine particulate matter (PM 2.5 ) national ambient air quality standard (NAAQS). The Martinsburg Area is comprised of Berkeley Coun ty in West Virginia and Washington County in Maryland (the Maryland portion of the Area). These plans were prepared by the Maryland Department of the Environment (MDE). This re view does not determine th e approvability of the redesignation request or maintenance plan. Emi ssions inventories in a redesignation request are used to show permanent and enforceable emi ssion reductions between the year the area was designated as a nonattainment area and the year th e area came into attainment. In a maintenance plan, the emissions inventorie s are used to reflect the emissions during the time the

nonattainment area came into attainment and are th en projected to show that the area will remain in attainment for at least 10 y ears after redesignation. Any questi ons pertaining to this technical summary should be directed to Alice H. Chow, A ssociate Director, Office of Air Monitoring and Analysis, at 215-814-2144 or via email at chow.alice@epa.gov

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II. Comprehensive Emissions Inventory

Under section 172(c)(3) of the Clean Air Act (CAA), st ates are required to submit a comprehensive, accurate, current accounting of actual emissions from all sources (point, nonpoint, nonroad, and onroad) in the nonattainment area. For PM 2.5 nonattainment areas, this inventory must contain primary PM 2.5 emissions (including condens ibles), sulfur dioxide (SO 2 ), nitrogen oxides (NO x ), volatile organic compounds (VOC), and ammonia (NH 3 ). On December 7, 2012 (77 FR 72966), EPA approved the 2002 emissi ons inventory submitted by the State of Maryland with the attainment plans for the 1997 annual PM 2.5 NAAQS to satisfy the requirements of section 172(c)(3) for the Ma ryland portion of the Martinsburg Area.

III. Emissions Inventories for Redesign ation Request and Maintenance Plan

2007 Attainment Year Inventory and Main tenance Plan Base Year Inventory

States are required to submit an inventory used for the year of attainment, which is referred to as the attainment year inventory or the maintenance plan base year inventory. Maryland used a 2007 emissions invent ory as its attainment year a nd maintenance plan base year emissions inventory for the Washington County maintenance plan. The 2007 inventory is appropriate to use because 2007 is part of the three-year period of 2007-2009 that demonstrated

attainment of the 1997 annual PM 2.5 NAAQS in the Martinsburg Area. The 2007 emissions inventory is used as the basis for the projected inventories that are used to show the Area will

remain in attainment.2 For the 2007 emissions inventory for the poi nt, nonpoint, and nonroad source categories,

MDE submitted the 2007 Version 3 Emissions I nventory developed through the Mid-Atlantic Regional Air Management Association (MARAMA) regional planning process. Documentation of the development of the 2007 emissions inve ntory can be found in MARAMA’s January 23, 2012 “Technical Support Document for the Development of the 2007 Emission Inventory for the Regional Air Quality Modeling in the Northeas t / Mid-Atlantic Regi on Version 3.3” (MARAMA 2007 TSD).

The Washington County 2007 point source inventory was classi fied as emissions from electric generating units (EGUs) and from non- EGU sources. EPA guidance for emissions inventory development provides that actual emissions should be used for purposes of the comprehensive emissions inventory. The point source inventory submitted was developed by

MARAMA in consultation with MDE.

The nonpoint source emissions inventory fo r 2007 was developed using 2007 specific activity data along with EPA emission factors and the most recently available emission calculation methodologies.

The 2007 nonroad emissions were generated the emissions using EPA’s National Mobile Inventory Model 2008 (NMIM), which used NONRO AD 2008a emissions model. Marine, air and rail/locomotive (MAR) emissions are not part of the NMIM and were calculated separately using the most recent methodologies and inputs.

The 2007 onroad mobile source inventory was developed by using EPA’s highway

mobile source emissions model MOVES2010a and the most recent planning assumptions. Local data inputs to MOVES2010a reflect the latest available planning assumptions using data obtained from MDE, Maryland’s Motor Vehi cle Administration (MVA), Maryland State Highway Administration (SHA), Hagerstown/ Eastern Panhandle Me tropolitan Planning Organization (HEPMPO), and othe r local/national sources. Do cumentation of the onroad inventory development is available in MDE’s “O n-Road (Highway) Mobile Emissions Inventory

Documentation for the Washi ngton County, Maryland PM2.5 N onattainment Area,” found in Appendix F on the State submittal.

EPA’s OAMA reviewed the files and the emi ssion results provided by MDE and found them to be acceptable. 2017 and 2025 Projected Emission Inventories

Projected inventories are used to show that the area will remain in attainment. MDE used 2017 and 2025 emission projections develope d through the MARAMA regional planning process for the interim and maintenance plan en d year, respectively. Th e projected inventories are derived by applying the approp riate growth and cont rol factors to the 2007 attainment year emissions inventory. Emission projections, emi ssion methodologies, control factors, and growth

factors for the 2017 and 2025 inventories ca n be found in MARAMA’s January 23, 2012 “Technical Support Document for the Developm ent of the 2017/2020 Emission Inventory for Regional Air Quality Modeling in the Nort heast/Mid-Atlantic Region,Version 3.3” and3 “Technical Support Document for the Developm ent of the 2025 Emission Inventory for PM Nonattainment Counties in the MANE-VU Regi on, Version 3.3, Rev. 2,” respectively.

Projected emissions for EGU point sources were developed based on electricity generation projections that are delineated by region and fuel. Growth factors for EGU sources are based on the U.S. Energy Information Administration’s (EIA’s) 2011 Annual Energy Outlook (AEO2011) (Appendix F, Table 96 - Elect ricity Generation by Electricity Market Module Region and Fuel Source). Projected em issions for non-EGU unit point sources were developed using AEO fuel consumption forecasts, State-level employment projections, and other State-specific emission projection data.

The projected onroad mobile source inventor ies were developed by using EPA’s highway mobile source emissions model MOVES2010a, the most recent planning assumptions, and Statedeveloped growth factors. Local data inputs to MOVES2010a reflect the latest available planning assumptions using data obtained from MDE, Maryland’s Motor Vehicle Administration (MVA), Maryland State Highway Administratio n (SHA), Hagerstown/ Eastern Panhandle Metropolitan Planning Organizatio n (HEPMPO), and other local/n ational sources. Growth factors were developed and selected based on consultation between Maryland Department of Transportation (MDOT), HEPMPO and MDE. Documentation of the onroad inventory development is available in MDE’s “On-Road (Highway) Mobile Emissions Inventory

Documentation for the Washi ngton County, Maryland PM2.5 N onattainment Area,” found in Appendix F on the State submittal.

Projected emissions for nonroad mobile sources were developed using NMIM2008 (version NMIM20090504), which used NONROAD2008a model (version July 2009), EPA’s most recently approved emissions estimation tool for nonroad sources. Emissions from airport ground support equipment were estimated based on EPA’s aircraft inventor y that was prepared using the Federal Aviation Administration’s (FAA’s) Emissions and Dispersion Modeling System (EDMS). Because NONROAD2008a does not estimate emissions from marine vessel, airport, and railroad sources, these emissions we re estimated separately. Emissions data for commercial marine vessels are based on recent EPA regulatory impact analyses. Airports emissions were projected by applying growth da ta reported by the FAA. Railroad emissions were projected based on growth data available in the AEO2010.

EPA’s OAMA reviewed the methodologies submitted by MDE and found them to be acceptable.