LCFS Life Cycle Analysis (LCA) For Public Comment
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Proposed Regulatory LCA Models and Documentation
Release Date: December 19, 2023
The California Air Resources Board (CARB or Board) has posted regulatory documents for the 45-day public comment period for proposed amendments to the Low Carbon Fuel Standard regulation. These documents were transmitted by CARB to the California Office of Administrative Law (OAL) on December 19, 2023.
The other rulemaking documents including the proposed Regulation Order and Initial Statement of Reasons are available here.
The public comment period for this regulatory action is from January 5, 2024 to February 20, 2024.
Download all LCA Documents (zip)
To ensure full functionality of LCA models, please download the file and open in Excel desktop application only. Online Excel may not display all features.
1. Proposed CA-GREET4.0 Model
| Release Date | Document Details | Comments |
|---|---|---|
| 12/19/2023 | CA-GREET4.0 Model (xlsm) The CA-GREET4.0 model is used to generate the carbon intensities (CIs) of fuel pathways, including Lookup Table pathways and applicant-specific Tier 1 and Tier 2 pathways. CA-GREET4.0 Model Documentation (pdf) This document describes the updates to Argonne GREET1 2022. | Comment Period Closed |
2. Proposed Tier 1 Simplified Calculators
| Release Date | Document Details | Comments |
|---|---|---|
| 12/19/2023 | Biodiesel Calculator (xlsm) Instruction Manual (pdf) Biomethane from Anaerobic Digestion of Dairy and Swine Manure Calculator (xlsm) Instruction Manual (pdf) Biomethane from Anaerobic Digestion of Organic Waste Calculator (xlsm) Instruction Manual (pdf) Biomethane from Anaerobic Digestion of Wastewater Sludge Calculator (xlsm) Instruction Manual (pdf) Biomethane from North American Landfills Calculator (xlsm) Instruction Manual (pdf) Hydrogen Calculator (xlsm) Instruction Manual (pdf) Hydroprocessed Ester and Fatty Acid Fuels Calculator (xlsm) Instruction Manual (pdf) Starch and Fiber Ethanol Calculator (xlsm) Instruction Manual (pdf) Sugarcane Ethanol Calculator (xlsm) Instruction Manual (pdf) | Comment Period Closed |
3. Proposed Lookup Table Changes
| Release Date | Document Details | Comments |
|---|---|---|
| 12/19/2023 | Lookup Table Pathways This document describes the calculations, assumptions, and conditions for using the new proposed Lookup Table pathways. | Comment Period Closed |
** The LCA calculators contain Excel macros and must be used with macros enabled. For questions about these files or to report a technical issue, please contact CARB LCFS Pathway Processing <lcfspathways@arb.ca.gov>.
Previous Draft Proposed Changes for Tier 1 Simplified Calculators and Lookup Table Values
Release Date: Feb. 2023 to June 2023
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 |