Last reviewed on 12-01-2023

Documentation of California's Greenhouse Gas Inventory (2023 Edition - Last updated on 12-1-2023)

♦ Category: Energy

IPCC: 1A1ai - Fuel Combustion Activities - Energy Industries - Main Activity Electricity and Heat Production - Electricity Generation
Sector: Electricity Generation (In State) : Utility Owned

♦ Activity: Fuel combustion - Digester gas

♦ Greenhouse gas: Carbon dioxide from biogenic sources ( CO2 )

► Year 2007 —

● Greenhouse gas emission estimate —

Amount: 115,755 tonnes of CO2 From biogenic materials (115,755 tonnes CO2 Eq.)
Basis: Calculation
Calculation: [Fuel combustion] * [Heat content] * [Fuel CO2 emission]
Reference: IPCC (2006). 2006 IPCC Guidelines for National Greenhouse Gas Inventories, Prepared by the National Greenhouse Gas Inventories Programme, Eggleston H.S., Buendia L., Miwa K., Ngara T., and Tanabe K. (eds). Volume 2, Chapter 2: Stationary Combustion. Published: IGES, Japan. http://www.ipcc-nggip.iges.or.jp/public/2006gl/pdf/2_Volume2/V2_2_Ch2_Stationary_Combustion.pdf

● Activity level used in calculations —

Activity: Fuel combustion = 2,643,368,609 scf of Digester gas
Basis: Data
Reference: EIA (2013). Energy Information Administration. Form EIA-906/920/923: Monthly Utility Power Plant Database. Accessed online at: https://www.eia.gov/electricity/data/eia923/#https://www.eia.gov/electricity/data/eia923/

● Parameters and Constants used in calculations —

Parameter: CO2 emission factor = 0.0521 g / btu
Reference: CARB Mandatory Reporting of Greenhouse Gas Regulation. Subpart C of 40 CFR Part 98 (§§98.30 to 98.38). Available online at: https://www.arb.ca.gov/cc/reporting/ghg-rep/regulation/subpart_c_rule_part98.pdf
Parameter: Heat content = 841 btu / scf
Reference: CARB Mandatory Reporting of Greenhouse Gas Regulation. Subpart C of 40 CFR Part 98 (§§98.30 to 98.38). Available online at: https://www.arb.ca.gov/cc/reporting/ghg-rep/regulation/subpart_c_rule_part98.pdf

● Greenhouse gas from biogenic materials per unit activity (derived from values listed above) —

Amount: 43.8 g of CO2 per scf of Digester gas