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Ecology provides the high-quality science that is the foundation of Washington state environmental policy. Our monitoring, assessment, and modeling services provide a data-rich understanding of our state’s land, air, and water. We provide access to that data through reports, databases, maps and user-friendly online tools.

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Two Rivers Terminal comments (WAC 173-460) 12/18

These are Two Rivers Terminal's 12/18 comments to remove ammonium sulfate from the toxic air pollutant list, Chapter 173-460 WAC.

https://ecology.wa.gov/two-rivers-terminal-comments

Tier 1 Calculator for Renewable Diesel (WAC 173-424) 11-28-22

This is the (Tier 1) simplified calculator for conventionally-produced renewable diesel. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.

https://ecology.wa.gov/tier-1-calculator-for-renewable-diesel-wac-173-2

Tier 1 Calculator for Renewable Diesel (WAC 173-424) 07-18-22

This is the (Tier 1) simplified calculator for conventionally-produced renewable diesel. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.

https://ecology.wa.gov/tier-1-calculator-for-renewable-diesel-wac-173-1

Tier 1 Calculator for Starch-Fiber Ethanol (WAC 173-424) 11-28-22

This is the (Tier 1) simplified calculator for conventionally-produced starch and fiber ethanol. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.

https://ecology.wa.gov/tier-1-calculator-for-starch-fiber-ethanol-wac-2

Tier 1 Calculator for Starch-Fiber Ethanol (WAC 173-424) 07-15-22

This is the (Tier 1) simplified calculator for conventionally-produced starch and fiber ethanol. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.

https://ecology.wa.gov/tier-1-calculator-for-starch-fiber-ethanol-wac-1

Tier 1 Calculator for Starch-Fiber Ethanol (WAC 173-424) 03/15/22

This is the (Tier 1) simplified calculator for conventionally-produced starch and fiber ethanol. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.

https://ecology.wa.gov/tier-1-calculator-for-starch-fiber-ethanol-wac-173

Tier 1 Calculator for Sugarcane-Derived Ethanol (WAC 173-424) 11-28-22

This is the (Tier 1) simplified calculator for conventionally-produced sugarcane-derived ethanol. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.

https://ecology.wa.gov/tier-1-calculator-for-sugarcane-derived-ethano-2

Tier 1 Calculator for Sugarcane-Derived Ethanol (WAC 173-424) 07-18-22

This is the (Tier 1) simplified calculator for conventionally-produced sugarcane-derived ethanol. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.

https://ecology.wa.gov/tier-1-calculator-for-sugarcane-derived-ethano-1

Tier 1 Calculator for Sugarcane-Derived Ethanol (WAC 173-424) 03/15/22

This is the (Tier 1) simplified calculator for conventionally-produced sugarcane-derived ethanol. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.

https://ecology.wa.gov/tier-1-calculator-for-sugarcane-derived-ethanol-wa

Tier 1 calculator manual (WAC 173-424) 11-22

This is the November 2022 instruction manual for Tier 1 simplified carbon intensity calculators. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.

https://ecology.wa.gov/tier-1-calculator-manual-wac-173-424-11-22

Tier 1 calculator manual (WAC 173-424) 07-20

This is the instruction manual for Tier 1 simplified carbon intensity calculators. The calculator is used for fuel life cycle analysis for the Clean Fuels Program.

https://ecology.wa.gov/tier-1-calculator-manual-wac-173-424-07-20

Utility Carbon Intensity Calculator (WAC 173-424) 11-28-22

This is the November 28, 2022 spreadsheet of Washington utility carbon intensity calculator.

https://ecology.wa.gov/utility-carbon-intensity-calculator-wac-173-424-11

Utility Carbon Intensity Calculator (WAC 173-424) 06-30-22

This is the June 30, 2022 spreadsheet of Washington utility carbon intensity calculator.

https://ecology.wa.gov/utility-carbon-intensity-calculator-wac-173-424-06

Utility Carbon Intensity Calculator (WAC 173-424) 04/04/22

This is the April 4, 2022 spreadsheet of Washington utility carbon intensity calculator.

https://ecology.wa.gov/utility-carbon-intensity-calculator-wac-173-424-04

WA-GREET electric power final (WAC 173-424) 06-30-22

This is the June 30, 2022 final supporting documentation for electric power pathway in WA-GREET, Washington's version of the Greenhouse Gases, Regulated Emissions, and Energy Use in Technologies Model.

https://ecology.wa.gov/wa-greet-electric-power-final-wac-173-424-06-30-22

WA-GREET electric (WAC 173-424) 06-30-22

This is the June 30, 2022 supporting documentation for electric power pathway in WA-GREET, Washington's version of the Greenhouse Gases, Regulated Emissions, and Energy Use in Technologies Model.

https://ecology.wa.gov/wa-greet-electric-wac-173-424-06-30-22

WA-GREET supplemental (WAC 173-424) 04/04/22

This is the April 4, 2022 supporting documentation for WA-GREET, Washington's version of the Greenhouse Gases, Regulated Emissions, and Energy Use in Technologies Model.

https://ecology.wa.gov/wa-greet-supplemental-wac-173-424-04-04-22

WA-GREET supplemental (WAC 173-424) 03/08/22

This is supporting documentation for WA-GREET, Washington's version of the Greenhouse Gases, Regulated Emissions, and Energy Use in Technologies Model.

https://ecology.wa.gov/wa-greet-supplemental-wac-173-424-03-08-22

Utah GREET model (WAC 173-424) 11-28-22

This spreadsheet is the final Utah GREET model, fuel carbon intensity calculator for Clean Fuels Program, November 28, 2022.

https://ecology.wa.gov/utah-greet-model-wac-173-424-11-28-22

Utah GREET model (WAC 173-424) 07-15-22

This spreadsheet is the Utah GREET model, fuel carbon intensity calculator for Clean Fuels Program, July 15, 2022.

https://ecology.wa.gov/utah-greet-model-wac-173-424-07-15-22