LCFS Life Cycle Analysis (LCA) For Public Comment
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Proposed Regulatory LCA Models and Documentation
Release Date: October 1, 2024
The California Air Resources Board (CARB or Board) has posted regulatory documents for the second 15-day public comment period for proposed amendments to the Low Carbon Fuel Standard regulation.
The other rulemaking documents for the second 15-day changes, including the proposed Regulation Order and Initial Statement of Reasons are available here.
The public comment period for this regulatory action is from October 1, 2024 to October 16, 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 Tier 1 Simplified Calculators
| Release Date | Document Details | Comments |
|---|---|---|
| 10/01/2024 | Biomethane from Anaerobic Digestion of Dairy and Swine Manure Instruction Manual (pdf) | Comment Period Closed |
Biomethane from Anaerobic Digestion of Organic Waste Instruction Manual (pdf) | ||
Hydrogen Calculator (xlsm) Instruction Manual (pdf) | ||
Hydroprocessed Ester and Fatty Acid Fuels Instruction Manual (pdf) |
** 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>.
First 15-day Proposed Changes for CA-GREET4.0 Model and Documentation, Tier 1 Simplified Calculators, and Lookup Table Values
1. Proposed CA-GREET4.0 Model
| Release Date | Document Details | Comments |
|---|---|---|
| 8/12/2024 | 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 |
|---|---|---|
| 8/12/2024 | 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 |
|---|---|---|
| 8/12/2024 | 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>.
ISOR Proposed Changes for CA-GREET4.0 Model and Documentation, Tier 1 Simplified Calculators, and Lookup Table Values
Release Date: December 19, 2023
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>.