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: Carbon dioxide from biogenic sources ( CO2 )

► Year 2011 —

● Greenhouse gas emission estimate —

Amount: 9,465 tonnes of CO2 From biogenic materials (9,465 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. ttp://

● Activity level used in calculations —

Activity: Fuel combustion = 216,147,677 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 CO2 emission = 0.0521 g / btu
Reference: USEPA (2012). Mandatory Reporting of Greenhouse Gas Regulation
Parameter: Heat content = 841 btu / scf
Reference: USEPA (2012). Mandatory Reporting of Greenhouse Gas Regulation

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

Amount: 43.8 g of CO2 per scf of Biomethane