2008 National Emissions Inventory Data & Documentation

In preparation for the 2008 NEI, the following data is being made available to help in creating your mobile, nonpoint and event files for submittal to the EIS.

Point - Only airport data will be released for the point data category prior to the publication of the 2008 General Purpose Release (NEI) on 12/31/2010.

Airport facility detail and Landing and Take Off (LTO) Data: For the 2008 NEI, EPA is adding approximately 16, 000 airports to the 3590 facilities already included in EIS from past inventory years. These files provide the preliminary information on all airport facilities and the 2008 LTO activity to be used for 2008. You can use the Source Category and AirCraftEngineType codes provided in the EIS Gateway to add detail to these files

Mobile

National Mobile Inventory Model (NMIM) National County Database (NCD) for 2008 and instructions to states. The NMIM model will be run as updates are received. All updates must be received no later than, June 1, 2010.

Instructions to State and Local agencies for updating the county-level database. NCD-Instructions and monthly ratios for gasoline parameter interpolation InterpolationRasio.csv

Entire NCD file used for preliminary 2008 NEI run
File name NCD20090327.zip.
This is the NCD used in the NMIM run that generated the emissions values in the preliminary 2008 NEI (runs performed April 2008). This zipped NCD file is in its original MySQL format. It includes the entire NCD that is used in conjunction with NMIM and thereby includes information for years other than 2008.

Entire NCD with Revisions for Gasoline Parameters
File name NCD20090531.zip.
There is one difference in these files and the NCD20090327 file above: the fuels for 2006-2011 in the gasoline table have been updated subsequent to the EPA's initial 2008 NMIM run for the NEI.

The following files are available at: NCD Files

• State-specific NCD Files. These files include the 2008 defaults plus the gasoline parameter updates. They have also been adjusted to ensure they pass EIS QA environment
• Concise directions to assist in submitting NCD information (see the file "NCDReadme.doc")

External Files
File Name: NCDNEI2008_ExternalFiles.zip.
This zipped file contains all the county-specific files targeted by the MOBILE and NONROAD models.

Onroad and Nonroad Emission Summary Files

Nonpoint - The following is a list of sectors in which EPA will provide county level emission estimates. These estimates have been developed in consultation with the Eastern Regional Technical Advisory Committee (ERTAC). This data should be available on the EIS Gateway by the end of August, 2009. These data will be used in those cases where S/L do not submit data.

• Architectural Coatings
• Traffic Paints
• Consumer Solvents
• Residential Heating; Anthracite coal
• Residential Heating; Bit/Subbit coal
• Residential Heating; Distillate Oil
• Residential Heating; Natural Gas
• Residential Heating; LPG
• Residential Heating; Wood
• Paved Roads
• Unpaved Roads
• Commercial Cooking
• Construction (Road, Residential, & Commercial/Industrial/Institutional)
• Cutback Asphalt
• Emulsified Asphalt
• Portable Fuel Containers (gas cans)
• Gasoline Distribution Stage I
• Stage 2 Gasoline Refueling
• Open Burning - Yard Waste - Leaves
• Open Burning - Yard Waste - Brush
• Land Clearing
• Household Waste Burning
• Publicly Owned Treatment Works (POTW)
• Animal Husbandry
• Fertilizer Application
• Pesticide Application

Additionally, for the emission sectors listed below, EPA will provide tools to help the S/L develop county level emission estimates. These sectors all have potential point source contributions and EPA is not able to develop county level emission estimates. Examples of these tools are emission factors based on employment data and county level employment data.

• Fuel Combustion; Industrial, Commercial, & Institutional
• Surface Coating - Auto Refinishing
• Surface Coating - Traffic Markings
• Surface Coating - Factory Finished Wood: SIC 2426 thru 242
• Surface Coating - Wood Furniture
• Surface Coating - Metal Furniture: SIC 25
• Surface Coating - Paper, foil, and film
• Surface Coating - Metal Can Coating
• Surface Coating - Sheet, strip, and coil
• Surface Coating - Miscellaneous Finished Metals: SIC 34 - (341 + 3498)
• Surface Coating - Machinery and Equipment: SIC 35
• Surface Coating - Large Appliances: SIC 363
• Surface Coating - Electronic and other Electric Coatings
• Surface Coating - Motor Vehicles
• Surface Coating - Aircraft
• Surface Coating - Marine
• Surface Coating - Railroad
• Surface Coating - Miscellaneous Manufacturing
• Industrial Maintenance Coatings
• Other Special Purpose Coatings
• Degreasing
• Graphic Arts
• Industrial Adhesives