GREET and AFLEET Model Guide

GREET 2020 Release

The Argonne National Laboratory’s Systems Assessment Center is pleased to announce the 2020 release of the suite of GREET Models. Please read Summary of Expansions and Updates in GREET® 2020 (554KB pdf) for more details on updates in this version.

GREET Excel Model: 

  • Fuel-Cycle Model: To download GREET_1_2020 please use the following link GREET 1 Series
  • Vehicle-Cycle Model: To download GREET_2_2020 please use the following link GREET 2 Series

 

The Department of Energy’s Clean Cities Program has enlisted the expertise of Argonne to develop a tool to examine both the environmental and economic costs and benefits of alternative fuel and advanced vehicles. Argonne has developed the Alternative Fuel Life-Cycle Environmental and Economic Transportation (AFLEET) Tool for Clean Cities stakeholders to estimate petroleum use, greenhouse gas emissions, air pollutant emissions, and cost of ownership of light-duty and heavy-duty vehicles using simple spreadsheet inputs.

The tool uses data from Argonne’s Greenhouse gases, Regulated Emissions, and Energy use in Technologies (GREET) fuel-cycle model to generate necessary well-to-wheels petroleum use and GHG emission co-efficients for key fuel production pathways and vehicle types. In addition, Environmental Protection Agency’s MOtor Vehicle Emission Simulator (MOVES) and certification data are used to estimate tailpipe air pollutant emissions. Various sources are used to provide default cost data, including the Clean Cities Alternative Fuel Price Report and American Recovery and Reinvestment Act awards.

Download tool and documentation

Salt Lake County Vehicle Repair and Replacement Assistance Program (VRRAP)

Vehicle Emissions Program

Salt Lake County Health Department

REPAIR HELP

Vehicle Repair Assistance Program (VRAP)

Depending on the age and overall condition of a vehicle failing the emissions test, low-income vehicle owners may qualify for vehicle repair assistance. We require a completed application and supporting documentation.

TESTING REQUIREMENTS

Before you may register a motor vehicle (either gasoline or diesel-powered) for operation in Salt Lake County, it must pass an emissions test.

  • Vehicles less than six years old are tested every other year.
  • Vehicles more than six years old must be tested every year.
  • Farm-plated vehicles and vehicles of model year 1967 or older are exempt from testing.

Independent testing facilities located throughout Salt Lake County perform the emissions testing. The  Vehicle Emissions Program licenses and regulates the facilities.

A malfunctioning vehicle can emit one hundred times the amount of pollution that it would if it were working properly.

Every day, the program keeps tons of pollutants out of the Salt Lake Valley’s air:

  • 82 tons of carbon monoxide (CO)
  • 4 tons of hydrocarbons (HC)
  • 4 tons of nitrogen oxide (NOx)

FAILING VEHICLES

Motor vehicles are responsible for more than 70% of the air pollution that affects our health. When a vehicle is operating properly, its emissions levels are very low. However, a malfunctioning vehicle can emit one hundred times the amount of pollution that it would if it were working properly. Properly tuned and well-maintained vehicles also provide better performance and fuel economy for the owner.

If your vehicle fails the emissions test:

  • Use a repair facility and technician who is familiar with your vehicle and its emissions system.
  • Secure a written estimate that includes diagnosis and recommended repairs.
  • If you are not satisfied with the estimate or diagnosis, get a second technician’s opinion or contact the Air Quality Bureau.
  • Check your vehicle owner’s manual for information specific to your vehicle. Many emissions systems are covered by warranties, if still applicable.

You cannot register a failing vehicle in Salt Lake County until it is properly repaired, retested, and passes the test.


Waivers

In very rare cases, vehicle owners have made repairs toward the major cause of the high emissions and those repairs have failed to reduce the pollution levels to below the standard. In some of those cases, SLCoHD may issue a repair waiver to allow a failing vehicle to be registered for that year.

A vehicle may qualify for a waiver if it has:

  • failed at least two emissions inspections.
  • received emissions-related repairs from a recognized repair facility.
  • fulfills all other waiver requirements.

Waivers are handled on a case-by-case basis and may or may not be granted. A waiver is a last resort. The vehicle must be inspected by a SLCoHD vehicle emissions technician to review all test data and repair information, and to verify the ineffective repairs. Contact the Air Quality Bureau for more information about waivers.

STATIONS/TECHS

USE ONLY THE FREE ADOBE ACROBAT READER TO COMPLETE AND SUBMIT YOUR APPLICATION OR RECERTIFICATION FORM. Some web browser PDF viewers may not properly submit your application or form.

Stations

Note that permits are not transferable; when a change of ownership occurs at a permitted facility, the new owner must apply for a new permit and pay all applicable fees.

Emissions Stations in good standing with SLCoHD may apply to become a Vehicle Repair Assistance Program (VRAP) repair station. For more information, contact the Air Quality Bureau.

Technicians

Utah Foundations Driving Towards a Cleaner Future Report (November 2019)

 

Driving Toward a Cleaner Future: Alternative Fuel Vehicles in Utah examines the incentives and disincentives around electric cars, as well as the policy decisions around preparation for a wide proliferation of electric vehicles in the future. It also examines the incentives and requirements around public and private heavy-duty fleet vehicles.

Key Findings of this Report

  • Electric vehicles – or battery electric cars and plug-in hybrids – accounted for less than 2% of the nation’s new vehicle market share in 2018. In Utah, electric’s market share was about 1.6%.
  • Addressing the fears of consumers is a core challenge in alternative fuel vehicle adoption. Less than a quarter of Americans consider purchasing electric cars because of concerns about running out of power, the availability of charging stations and initial vehicle cost.
  • Utah’s relatively small electric vehicle tax credit was not renewed in 2016, yet electric vehicle market share has continued to increase.
  • The top electric-vehicle-adopting states – all in the West – offer significant incentives. However, the 10 states with the highest market share growth in 2018 offer no incentives (though they all had 2017 market share under one percent).
  • There is evidence that the looming threat of expiring tax credits can encourage short-term market uptake of alternative fuel vehicles.
  • Due to state and local investment, as well as the Volkswagen Settlement and private actors, Utah’s electric vehicle charging infrastructure is poised to quickly expand
  • Large fleet vehicles account for one-third to one-half of Utah’s vehicle emissions, even though they account for only 3% of the vehicle miles traveled.
  • Alternative-fuel, heavy-duty fleet vehicles are more expensive than diesel and have large infrastructure costs, but offer large fuel and maintenance savings.
  • To encourage the market’s embrace of alternative fuel vehicles, state and local governments should continue to explore opportunities to encourage private actors to deploy alternative fuel infrastructure for customers, tenants, employees and visitors.
  • Cities and counties have at least two potential roles to play: adopting building codes that are “future-proof” for the growth in alternative fuel vehicles, and retiring older public-service diesel fuel fleets.
  • Utah may get a substantial air quality return on its tax credit investments by continuing to focus incentives on heavy-duty fleet vehicles and renewing them in 2020.
  • To encourage the market’s embrace of alternative fuel vehicles, public and private sector stakeholders should mount public information campaigns to explain the growing availability of alternative fuel infrastructure and address other consumer fears.

You can download a pdf of the report here

See the comprehensive, 2014, air quality report here.