Emissions Inventory

Modified February 3, 2020

The USEPA requires States to inventory and submit emissions from air pollution sources. These sources include Point Sources (industrial stationary sources), Nonpoint Sources (small facilities, lawn mowers, wood stoves, etc.), and Mobile Sources (cars, trucks, boats, etc.). Only the Point Source emissions are required to be reported to the USEPA every year. Nonpoint and Mobile sources are reported every three years. The most recent comprehensive three-year inventory was for the 2017 calendar year.

Inventory data is used to verify whether air programs previously enacted are being effective and to aid in designing air programs needed to ensure air quality is improved or maintained. Additionally, for new rule development, the USEPA uses these emissions estimates to model the risk to nearby communities; especially for toxic air pollutants.

West Virginia uses the State & Local Emissions Inventory System (SLEIS) database software to collect the Title V point source emissions. This web based software can be accessed at https://apps.dep.wv.gov/SLEIS.

To use SLEIS, an account must be established. If you are not registered, please download, complete, save, and email the registration form (available from the SLEIS webpage) to dep.aei@wv.gov.

Major Title V facilities (not Title V deferred facilities) are required to submit the 2019 calendar year inventory by March 31, 2020. Data request letters were mailed to each facility on or before December 31, 2019.

Deferred Title V Facilities are required to submit the 2019 calendar year inventory (facility summary only) by May 1, 2020. Data request letters were mailed to each facility on or before December 31, 2019.

Documents to be Completed and Submitted with Inventory

The two Excel spreadsheets below must be completed and sent as attachments to SLEIS, or emailed to dep.aei@wv.gov. The Certification of Data Accuracy must be printed, filled out, and submitted on paper (or scanned and emailed to dep.aei@wv.gov) as it contains a signature.

  • Certification of Data Accuracy
    • Date: November 17, 2017
    • Summary: This document cannot be submitted as an attachment in SLEIS, as it requires a confirmation number that will not be available until AFTER the SLEIS inventory has been submitted.
  • Declaration of Data Confidentiality
    • Date: October 30, 2013
    • Summary: Use to describe Confidential Business Information (CBI) in the Emission Inventory submittal. Do not put confidential information in the SLEIS submittal. Confidential data is to be submitted separately. If not claiming data confidential, put an "X" in the box labeled "Check here". Copy the completed table and attach it to your SLEIS emission inventory submittal.
  • Title V Cross Reference Table
    • Date: October 30, 2013
    • Summary: Use to reconcile differences between Title V and SLEIS numbering schemes. If the numbering schemes match exactly, submit with an "X" in the box labeled "Check here". Copy the completed table and attach it to your SLEIS emission inventory submittal. You must submit this spreadsheet every year, even if one was submitted for a prior year.

Supporting Information

The following documents contain useful information for emission inventory preparation and reporting.

  • 2019 EI Basic Reporting Guidance
    • Date: December 11, 2018
    • Summary: Provides basic SLEIS guidance and addresses questions and problems that have arisen during previous reporting years.
  • Filterable and Condensable PM
    • Date: December 30, 2013
    • Summary: PDF of PowerPoint presentation explaining different types of particulate matter.

Resources for Estimating Emissions

Emission Inventory Improvement Program (EIIP)

U.S. EPA's AP-42 Emission Factor Website

Contact Information

Bin Schmitz, Environmental Resources Analyst
West Virginia Department of Environmental Protection
Division of Air Quality
Nonpoint Sources
601 57th St. SE
Charleston, WV 25304
Phone: (304) 926-0499 x41906
Email: bin.z.schmitz@wv.gov

Matt Kemper, Environmental Resources Analyst
West Virginia Department of Environmental Protection
Division of Air Quality
Mobile Sources, Oil & Gas
601 57th St. SE
Charleston, WV 25304
Phone: (304) 926-0499 x41270
Email: matt.a.kemper@wv.gov

Dave Porter, Engineer
West Virginia Department of Environmental Protection
Division of Air Quality
General Questions, Point Sources, SLEIS Administrator & Tech Support, Emissions Inventory Web Page
601 57th St. SE
Charleston, WV 25304
Phone: (304) 926-0499 x41291
Email: david.j.porter@wv.gov