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Proposed Costco Wholesale Redwood City GDF Expansion 7.A. - Page 190 <br /> Air Quality/Climate Change Analysis <br /> Appendix B: Operation Emission Calculations <br /> Table B-6. San Mateo County EMFAC2011 On-road Vehicle Emission Factors for 2012. <br /> Summer Emission Factors Winter Emission Factors Peak Daily Emission Factors Ann.Ave.Emission Factors <br /> LDAs,LDTs,and MDTs LDAs,LDTs,and MDTs LDAs,LDTs,and MDTs LDAs, LDTs,and MDTs <br /> Parameter Units Gasoline Fuel Onl Gasoline Fuel Onl Gasoline Fuel Onl Gasoline Fuel Onl <br /> Criteria Pollutants <br /> ROG Ib/mile 0.00064719 0.00069478 0.00069478 0.00063583 <br /> CO Ib/mile 0.00660262 0.00722407 0.00722407 0.00674523 <br /> NOx Ib/mile 0.00062181 0.00076436 0.00076436 0.00070559 <br /> PM�o Ib/mile 0.00010596 0.00010596 0.00010596 0.00010596 <br /> PM2.5 Ib/mile 0.00004574 0.00004574 0.00004574 0.00004574 <br /> SOx Ib/mile 0.00000951 0.00000896 0.00000951 0.00000899 <br /> Greenhouse Gases <br /> COZ Ib/mile 0.94156745 0.88522791 0.94156745 0.88848919 <br /> CH4 Ib/mile 0.00008630 0.00008131 0.00008630 0.00008152 <br /> N20 Ib/mile 0.00006614 0.00006231 0.00006614 0.00006248 <br /> Trip Distance mi/trip 5.97 5.97 5.97 5.97 <br /> Notes: <br /> 1. Criteria pollutant and COZ emission factors for on-road motor vehicles are derived from the California Air Resources Board's <br /> EMFAC2011 model emission estimates for San Mateo County for 2012. Source: California Air Resources Board,EMFAC2011 Web <br /> Based Data Access,October 24,2011,emissions data option,available at www.arb.ca.gov/msei/modeling.htm(accessed January <br /> 12,2012). Emissions were estimated for the light duty auto(LDA),light duty truck(LDT1 and LDT2),and medium duty vehicle(MDV) <br /> categories,summed,and converted to pounds per mile using the sum of EMFAC2011 daily VMT estimates. <br /> 2. Methane(CH4)and nitrous oxide(N20)emissions were calculated based on emission factors developed for the California Air <br /> Resources Board 2000-2009 Greenhouse Gas Emissions Inventory. Source: California Air Resources Board,Documentation of <br /> California's Greenhouse Gas Inventory,May 24,2012,data for 2009,Category 1A3b-Road Transportation,available at <br /> www.arb.ca.gov/cc/inventory/doc/doc index.php(accessed May 24,2012). Factors for Light Duty Trucks and Sports Utility <br /> Vehicles were used for Medium Duty Vehicles(MDVs). <br /> a.Light duty autos(Category 1A3bi-gasoline): <br /> 0.793 grams methane/gallon of gasoline <br /> 0.598 grams nitrous oxide/gallon of gasoline <br /> b.Light duty trucks and Sports Utility Vehicles(Category 1A3bii-gasoline): <br /> 0.748 grams methane/gallon of gasoline <br /> 0.584 grams nitrous oxide/gallon of gasoline <br /> 3. Criteria pollutant emission factors include total emissions for each pollutant. In addition to exhaust emissions, ROG factors include <br /> diurnal,hot soak,running loss,and resting loss emissions. In addition to exhaust emissions, PN�o and PM2.5 factors include <br /> emissions from brake wear and tire wear. <br /> 4. Trip length is calculated based on daily VMT and trip information from EMFAC2011 model emission estimates for San Mateo County <br /> for 2012. <br /> 5. Conversion factors: <br /> 2000 pounds/ton <br /> 453.59 grams/pound <br /> Page 10 Date: 7/30/2012 <br />