Last reviewed on 06-22-2018

Documentation of California's Greenhouse Gas Inventory (11th Edition - Last updated on 11-06-2019)

♦ Category: Energy

IPCC: 1A3biii - Fuel Combustion Activities - Transport - Road Transportation - Heavy-duty Trucks and Buses
Sector: Transportation : On Road

♦ Activity: Fuel combustion - Biomethane

♦ Greenhouse gas: Methane ( CH4 )

► Year 2012 —

● Greenhouse gas emission estimate —

Amount: 0.184 tonne of CH4 Emitted (4.60 tonnes CO2 Eq.)
Basis: Calculation
Calculation: [Fuel combustion] * [Heat content] * [Fuel CH4 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. ttp://www.ipcc-nggip.iges.or.jp/public/2006gl/pdf/2_Volume2/V2_2_Ch2_Stationary_Combustion.pdf#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 = 218,714,800 scf of Biomethane
Basis: Data
Reference: ARB (2016). Personal communiciation between Kevin Eslinger, California Air Resources Board, and Low Carbon Fuel Standard (LCFS) staff. 2016.

● Parameters and Constants used in calculations —

Parameter: Fuel CH4 emission = 1.000E-06 g / btu
Reference: USEPA (2012). Mandatory Reporting of Greenhouse Gas Regulation http://www.epa.gov/ghgreporting/
Parameter: Heat content = 841 btu / scf
Reference: USEPA (2012). Mandatory Reporting of Greenhouse Gas Regulation http://www.epa.gov/ghgreporting/
Constant: Global warming potential of CH4 = 25
Reference: IPCC (2007). Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Solomon S., Qin D., Manning M., Chen Z., Marquis M., Averyt K.B., Tignor M., and Miller H.L. (eds.). http://www.ipcc.ch/publications_and_data/publications_ipcc_fourth_assessment_report_synthesis_report.htm

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

Amount: 8.410E-04 g of CH4 per scf of Biomethane
0.021 g of CO2eq. per scf of Biomethane
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