Gasoline Dispensing Facility Emission Factors

This page last reviewed March 27, 2014

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Background

The Air Resources Board (ARB) has updated the total organic gas (TOG) emission factors for California gasoline dispensing facilities (GDF). In California, these facilities distribute approximately 15 billion gallons of gasoline per year to motor vehicles, fuel containers, and gasoline-powered equipment. TOG emissions, which are ozone precursors, can occur at GDFs when gasoline is transferred from delivery vehicles to GDF underground tanks, storage of gasoline at GDF, and transfer of gasoline from GDF underground tanks to motor vehicles, fuel containers, and other gasoline powered equipment. Other emission points include gasoline spillage and permeation of gasoline from dispensing hoses.

The updated TOG emission factors for California GDF reflect advances in vapor recovery system performance achieved through implementation of ARB's enhanced vapor recovery program and the interaction between GDF vapor recovery systems and vehicles equipped with onboard refueling vapor recovery (ORVR) systems, which first appear with 1998 model-year passenger vehicles and are required on all 2006 model-year vehicles with a gross vehicle weight rating of 10,000 pounds or less.

The technical support for the revised TOG emission factors is found in "Revised Emission Factors for Gasoline Marketing Operations at California Gasoline Dispensing Facilities," which provides a summary of five supporting attachments. The following hyperlinks can be used to access these documents.

     Revised Emission Factors for Gasoline Marketing Operations at California Gasoline Dispensing Facilities

        Attachment 1 - Revised Emission Factors for Phase II Vehicle Fueling at California Gasoline Dispensing Faculties

        Attachment 2 - Revised Emission Factors for Phase I Gasoline Bulk Transfer at California Gasoline Dispensing Facilities

        Attachment 3 - Revised Emission Factors for Pressure Driven Emissions at California Gasoline Dispensing Facilities

        Attachment 4 - Revised Emission Factors for Gasoline Spillage at California Gasoline Dispensing Facilities

        Attachment 5 - Proposed Emission Factors for Gasoline Dispensing Hose Permeation at California Gasoline Dispensing Facilities

If you have questions regarding the revised emission factors, please contact Angus MacPherson via email at amacpher@arb.ca.gov or by phone at (916) 445 4686.

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