Mobile Sources Emissions Technical Support Documents

This page last reviewed April 14, 2010

Technical Support Documents 
These documents reflect the most current information but may be revised.  

EMFAC Model

    Available Memos

OFFROAD Model

     Available Documents
  • Addition of Tier 4 Emission Factors to Off-road Large Compression-Ignited Engines (>25 hp)
  • Off-Road Exhaust Emissions Inventory Fuel Correction Factors
  • Addendum to Evaporative Emissions for Small Off-Road Engines to Include Large-Spark Ignition Engines
  • Revisions to the Diesel Transport Refrigeration Units (TRU) Inventory
  • Estimation of the Impact of Ethanol on Off-Road Evaporative Emissions
  • Changes to the Locomotive Inventory
One-Pager Documents (Draft) Under Review
  • Recreational Vehicles

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