Documentation for the 2011 NEI is ongoing at this time. Updates will be posted as available.  Requests for additional information can be made to the Info CHIEF Help Desk at info.chief@epa.gov.

• 2011 NEI Technical Support Document
• Supporting Data and Summaries
• 2011 NEI Report

• Quality Assurance details

  • Quality assurance routines for the 2011 data (xlsx)(1 pg, 22 K)
  • Emission InventorySystem QA Changes for the 2011 NEI (xlsx)(1 pg, 64 K)
  • Emission Inventory system QA Checks (xlsx)(1 pg, 124 K)  (formerly Appendix 5)
  • Priority Facility List (xls)(1 pg, 2 MB) : Facilities deemed high priority based on aggregate contribution to emission

• Nonpoint Emissions Tool and Methods

  • Nonpoint Categories (xlsx)(1 pg, 18 K) that EPA is developing emission estimates for or planning to pull forward the 2008 estimates for use in 2011, if not provided by Agencies. (Updated September 2012)
  • Data and documentation:  MS Excel spreadsheets with emission factors, activities and county level allocation factors, and MS Word documents that describe the methodology used to estimate emissions
  • Oil & Gas Emission Estimation Tool: (ZIP 6.5 MB) Includes the Access database tool, Supporting Materials, Documentation and Instructions for version 2. (Updated November 2014)

• Onroad Mobile Resources

  • Example run specification file:  Sample county run specification file for 2011 NEI.
  • Generic CDB Creator (ZIP)(13 pp, 2 MB) XML template for creating CDBs for submission to the NEI
  • QA Tools:  Tools to QA CDBs and to create the required QA Reports for EIS CDB submission
  • CDB Sampler Header (xml)(1 pg, 2 K) file that can be edited for EIS submittal as an alternative to creating it via Bridge Tool Staging Tables
  • National County Checklist (xlsx)(1 pg, 101 K) : checklist that indicates which tables the agency has revised from EPA's defaults for each county's CDB

• Rail (locomotives) and Commercial Marine

  • 2011NEIv2 Shape Fractions of County Emission for Rail and Commercial Marine (ZIP)(1 pg, 2 MB)
  • Rail and Commercial Marine Shapefile Information for the 2011 NEI (docx)(1 pg, 12 K)  
  • Shapefile Fractions of County Emissions for Rail and Commercial Marine (ZIP)(1 pg, 2 MB)
  • Port Shape Files (ZIP)(1 pg, 1 MB) last revised August 2014 
  • ShippingLane Shape Files (ZIP)(1 pg, 26 MB) last revised August 2014
  • Rail Line Shape Files, (ZIP)(1 pg, 29 MB) last revised August 2014