Last reviewed on 06-22-2018

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

♦ Category: Energy

IPCC: 1A3bi - Fuel Combustion Activities - Transport - Road Transportation - Cars
Sector: Transportation : On Road : Light-duty Vehicles : Passenger Cars

♦ Activity: Fuel combustion - Ethanol

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

► Year 2017 —

● Greenhouse gas emission estimate —

Amount: 4,097,358 tonnes of CO2 From biogenic materials (4,097,358 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://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 = 712,712,978 gal of Ethanol
Basis: Calculation
Calculation: [EMFAC category fuel combustion] * ([Fuel sales] / [EMFAC total fuel combustion]) * [Fraction of fuel mix]
Reference: ARB (2016). Technical support document on GHG inventory methodologies for the 2000-2014 inventory. See Discussion of emissions from on-road transportation available at: ttps://ww3.arb.ca.gov/cc/inventory/pubs/reports/2000_2014/ghg_inventory_00-14_technical_support_document.pdf#https://ww3.arb.ca.gov/cc/inventory/pubs/reports/2000_2014/ghg_inventory_00-14_technical_support_document.pdf
Reference: Not Applicable.

● Parameters and Constants used in calculations —

Parameter: EMFAC category fuel combustion = 7,104,841,430 gal
Reference: ARB (2017b). The California Air Resources Board's Emission FACtors (EMFAC) model was used to calculate emission rates from all motor vehicles, such as passenger cars and heavy-duty trucks, operating on highways, freeways, and local roads in California. Model and documentation available online at: /msei/msei.htm
Parameter: EMFAC total fuel combustion = 15,291,874,021 gal
Reference: ARB (2017b). The California Air Resources Board's Emission FACtors (EMFAC) model was used to calculate emission rates from all motor vehicles, such as passenger cars and heavy-duty trucks, operating on highways, freeways, and local roads in California. Model and documentation available online at: /msei/msei.htm
Parameter: Fraction of fuel mix = 0.0986
Reference: ARB (2016). Technical support document on GHG inventory methodologies for the 2000-2014 inventory. See Discussion of emissions from on-road transportation available at: ttps://ww3.arb.ca.gov/cc/inventory/pubs/reports/2000_2014/ghg_inventory_00-14_technical_support_document.pdf#https://ww3.arb.ca.gov/cc/inventory/pubs/reports/2000_2014/ghg_inventory_00-14_technical_support_document.pdf
Parameter: Fuel CO2 emission = 0.0684 g / btu
Reference: ARB (2016). Technical support document on GHG inventory methodologies for the 2000-2014 inventory. See Discussion of emissions from on-road transportation available at: ttps://ww3.arb.ca.gov/cc/inventory/pubs/reports/2000_2014/ghg_inventory_00-14_technical_support_document.pdf#https://ww3.arb.ca.gov/cc/inventory/pubs/reports/2000_2014/ghg_inventory_00-14_technical_support_document.pdf
Parameter: Fuel sales = 15,564,452,022 gal
Reference: CDTFA (2019). [Formerly referred to as Board of Equalization (BOE)]. California Department of Tax and Fee Administration. Fuel Taxes Statistics & Reports - Motor Vehicle Fuel. Accessed online at: ttp://www.cdtfa.ca.gov/taxes-and-fees/spftrpts.htm#http://www.cdtfa.ca.gov/taxes-and-fees/spftrpts.htm
Parameter: Heat content = 84,000 btu / gal
Reference: USEPA (2012). Mandatory Reporting of Greenhouse Gas Regulation http://www.epa.gov/ghgreporting/

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

Amount: 5,749 g (i.e. 5.75 kg) of CO2 per gal of Ethanol
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