MSEI - OFFROAD Archives - Technical Draft Memos Archived technical draft memos for the OFFROAD category.Addition of Tier 4 Emission Factors to Off-road Large Compression-Ignited Engines (>25 hp)Off-Road Exhaust Emissions Inventory Fuel Correction FactorsAddendum to Evaporative Emissions for Small Off-Road Engines to Include Large-Spark Ignition EnginesRevisions to the Diesel Transport Refrigeration Units (TRU) InventoryEstimation of the Impact of Ethanol on Off-Road Evaporative Emissions