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National Clean Diesel Campaign (NCDC)

Working Together for Cleaner Air

Results and Outputs
Diesel Emissions Quantifier (DEQ)

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Need help?  DEQ Trouble Shooting

The DEQ estimates emission reductions based on retrofit technologies and other information entered into the DEQ. After clicking on ‘Quantify Emissions’, you will see the ‘Emissions Results’ page with two tabs.

Emissions Results Tab

This tab provides a summary of emission results for your entire retrofitted fleet. At the bottom of the page, you will find 'Capital Cost Effectiveness', 'Total Cost Effectiveness' and the remaining lifetime for each vehicle group.

Below that, you can download your DEQ results as a printable spreadsheet or in a format that can be imported into DRIVER.

The DEQ calculates emission reductions for four criteria pollutants, NOx, PM, HC, CO, as well as CO2. The following eight outputs are calculated for each pollutant.

  • Annual Results - Baseline for Retrofitted Vehicles in short tons is the annual baseline emissions before the fleet is retrofitted.
  • Annual Results - Amount Reduced in short tons is the annual emissions reduced after the fleet has been retrofitted.
  • Annual Results - Percent Reduced (%) is the percent by which emissions are reduced after the fleet has been retrofitted.
  • Lifetime Results - Baseline for Retrofitted Vehicles in short tons is the lifetime baseline emissions before the fleet is retrofitted.
  • Lifetime Results - Amount Reduced in short tons is the lifetime emissions reduced after the fleet has been retrofitted.
  • Lifetime Results - Percent Reduced (%) is the percent by which lifetime emissions are reduced after the fleet has been retrofitted.
  • Capital Cost Effectiveness ($/ton) is the Capital Costs (Unit Cost plus Installation Cost) for retrofit technologies divided by the ‘Lifetime Amount Reduced’ emissions. These fields will be blank if the costs have not been entered on the ‘Add a New Technology’ screen.
  • Total Cost Effectiveness ($/ton) is the 'total project costs' divided by the ‘Lifetime Amount Reduced’ emissions. These fields will be blank if the costs have not been entered on the 'Enter Fleet Information' screen.

Health Benefits Tab

This tab estimates health benefits based on the annual reductions of PM. Costs come from the Capital Costs (unit cost plus installation cost) entered on the 'Add a New Technology' screen. Benefits are the monetized health benefits resulting from reduced PM. Both costs and benefits have been annualized over the remaining life of the fleet.

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