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
- EMFAC 2007 Population Technical Memo Update
- Corrections to Heavy-Duty Gas Cap Benefits
- Updating Vehicle Miles Traveled and Speed Distributions in EMFAC 2007
- Redistribution Of Heavy-Heavy Duty Diesel Truck Vehicle Miles Traveled In California
- Coding Modifications To Evaporative Emissions Algorithms
- Revision Of Heavy Heavy-Duty Diesel Truck Emission Factors And Speed Correction Factors
- Revised Planning Relative Humidity Profiles
- Revised Planning Temperature Profiles
- Increased Evaporative Emissions From On-Road Motor Vehicles Due To Ethanol Permeation
- Modifications To The Inspection And Maintenance Programs In The Working Draft Of Emfac2007
- On-Road Emissions Inventory Fuel Correction Factors
- Coding Modifications To Correct Errors In Emfac2002
- Revise Brake Wear PM Emission Factor
- Modification of Mileage Accrual Rates
- Determination of Statewide Percent of Heavy-Heavy Duty Diesel Truck (HHDDT) by County
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
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