LCFS Life Cycle Analysis Models and Documentation
Categories
Release for Public Feedback: Draft Proposed Changes for Tier 1 Simplified Calculators and Lookup Table Values
Instructions for Submitting Feedback
All feedback is due by July 12, 2023 at 5:00 PM (PDT).
- Click the Submit Feedback link for the corresponding proposed item.
- In the Subject line, please include the specific calculator's name below or enter "LUT Technical Support Document".
- Please provide a separate feedback entry for each item; do not combine them if submitting more than one.
Feedback received will be entered into the LCFS Calculator Feedback Log.
1. Proposed New Tier 1 Simplified Calculators for Public Feedback
| Release Date | Simplified Tier 1 Calculator Name | Documents | Feedback |
|---|---|---|---|
| 6/20/2023 | Biomethane from Anaerobic Digestion of Dairy and Swine Manure | Calculator (xlsm) Instruction Manual (pdf) | Comment Period Closed |
| 5/12/2023 | Hydroprocessed Ester and Fatty Acid Fuels | Calculator (xlsm) Instruction Manual (pdf) | Comment Period Closed |
| 4/28/2023 | Biomethane from Anaerobic Digestion of Organic Waste | Calculator (xlsm) Instruction Manual (pdf) | Comment Period Closed |
| 4/24/2023 | Sugarcane Ethanol | Calculator (xlsm) Instruction Manual (pdf) | Comment Period Closed |
| 4/14/2023 | Biodiesel | Calculator (xlsm) Instruction Manual (pdf) | Comment Period Closed |
| 3/8/2023 | Biomethane from Anaerobic Digestion of Wastewater Sludge | Calculator (xlsm) Instruction Manual (pdf) | Comment Period Closed |
| 2/28/2023 | Biomethane from North American Landfills | Calculator (xlsm) Instruction Manual (pdf) | Comment Period Closed |
| 2/21/2023 | Hydrogen | Calculator (xlsm) Instruction Manual (pdf) | Comment Period Closed |
| 2/21/2023 | Starch and Fiber Ethanol | Calculator (xlsm) Instruction Manual (pdf) | Comment Period Closed |
2. Proposed Lookup Table Changes for Public Feedback
| Release Date | Document Name | Description | Feedback |
|---|---|---|---|
| 2/21/2023 | Lookup Table Pathways Technical Support Documentation | This document describes the calculations, assumptions, and conditions for using the new proposed Lookup Table pathways. | Comment Period Closed |
CA-GREET3.0 Model and Tier 1 Simplified Carbon Intensity Calculators
The amendments to the LCFS regulation the Board adopted at its September 2018 hearing replace CA-GREET2.0 with the CA-GREET3.0 model and Tier 1 Simplified CI Calculators for LCFS fuel life cycle analysis. The CA-GREET3.0 model is used to generate the carbon intensities (CIs) of all fuel pathways, including Lookup Table pathways and applicant-specific Tier 1 and Tier 2 pathways.
Current Version: Effective January 4, 2019 (released August 13, 2018*)
- CA-GREET3. 0 Model
- Tier 1 Simplified CI Calculator for Starch and Fiber Ethanol
- Tier 1 Simplified CI Calculator for Sugarcane-derived Ethanol
- Tier 1 Simplified CI Calculator for Biodiesel and Renewable Diesel
- Tier 1 Simplified CI Calculator for LNG and L-CNG from North American Natural Gas
- Tier 1 Simplified CI Calculator for Biomethane from North American Landfills
- Tier 1 Simplified CI Calculator for Biomethane from Anaerobic Digestion of Wastewater Sludge
- Tier 1 Simplified CI Calculator for Biomethane from Anaerobic Digestion of Organic Waste
- Tier 1 Simplified CI Calculator for Biomethane from Anaerobic Digestion of Dairy and Swine Manure
*Minor changes to models posted on August 13, 2018 are documented in the second LCFS errata.
CA-GREET3.0 Supplemental Document and Tables of Changes. The CA-GREET3.0 model was developed from GREET1 2016 developed at Argonne National Laboratory. Argonne’s currently supported GREET versions are available. The changes staff made in converting GREET1 2016 into CA-GREET3.0 are documented in this document.
Lookup Table Pathways (Table 7-1)
CA-GREET3.0 Lookup Table Technical Support Documentation. Describes the calculations, assumptions, and conditions for using the Lookup Table pathways developed by CARB using CA-GREET3.0. The CI of Lookup Table pathways for California Average Grid Electricity used in Transportation and the Smart Charging/Smart Electrolysis pathways are subject to annual updates, pursuant to section 95488.5(d). For the 2019 CIs of these electricity pathways, visit LCFS Pathway Certified Carbon Intensities and technical documentation.
Temporary Pathways Table (Table 8)
Temporary pathways certified pursuant to section 95488.9(b)(4) of the LCFS regulation:
- Biomethane CNG, LNG or L-CNG from Anaerobic Digestion of Swine Manure
- Renewable Propane
- Alternative Jet Fuel
- Renewable Naphtha
Previous Life Cycle Analysis Models
September 29, 2015 release (in use from January 2016 to December 2018):
- CA-GREET 2.0 Tier 1
- CA-GREET 2.0 Tier 2
- CA-GREET 2.0 Supplemental Document
- California Reformulated Gasoline and Ethanol Denaturant Calculator.
- Oil Production Greenhouse Gas Emissions Estimator, or OPGEE
2009
- December 2009: California-GREET Model version 1.8b (modified by Life Cycle Associates LLC)
- February 2009: California-GREET Model version 1.8b (modified by Life Cycle Associates LLC)
- December 2008: California-GREET Model version 1.8b (modified by Life Cycle Associates LLC)
- September 2008: California-GREET Model version 1.8b (modified by Life Cycle Associates LLC)
- February 14, 2008: California-GREET Model 1.7 version 98
- Original GREET Model version 1.8b from ARGONNE National Laboratory