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Proposed Costco Wholesale Redwood City GDF Expansion 7.A. - Page 192 <br /> Air Quality/Climate Change Analysis <br /> Appendix B: Operation Emission Calculations <br /> Table B-8. San Mateo County EMFAC2011 On-road Heavy-Heavy Duty Diesel Truck(Vehicle Category T7)Emission Factors for 2012. <br /> Summer Emission Factors Winter Emission Factors Peak Daily Emission Factors Ann.Ave.Emission Factors <br /> HHDTs(Category T7) HHDTs(Category T7) HHDTs(Category T7) HHDTs(Category T7) <br /> Parameter Units Diesel Fuel Onl Diesel Fuel Onl Diesel Fuel Onl Diesel Fuel Onl <br /> Criteria Pollutants <br /> ROG Ib/mile 0.00135173 0.00136629 0.00136629 0.00135784 <br /> CO Ib/mile 0.00588280 0.00623938 0.00623938 0.00603256 <br /> NOx Ib/mile 0.02537286 0.02659550 0.02659550 0.02625060 <br /> PM�o Ib/mile 0.00103811 0.00104074 0.00104074 0.00103921 <br /> PM2.5 Ib/mile 0.00083769 0.00084011 0.00084011 0.00083870 <br /> SOx Ib/mile 0.00003820 0.00003807 0.00003820 0.00003815 <br /> Greenhouse Gases <br /> COZ Ib/mile 4.00447997 3.99003722 4.00447997 3.99841402 <br /> CH4 Ib/mile 0.00010210 0.00010173 0.00010210 0.00010195 <br /> N20 Ib/mile 0.00013190 0.00013142 0.00013190 0.00013170 <br /> Trip Distance mi/trip 7.30 7.30 7.30 7.30 <br /> Notes: <br /> 1. Criteria pollutant and COZ emission factors for on-road heavy-heavy diesel trucks 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,February 9,2012,emissions data option,available at www.arb.ca.gov/msei/modeling.htm(accessed May 24, <br /> 2012). <br /> 2. Methane(CH4)and nitrous oxide(N20)emissions were calculated based on emission factors developed for the California Air Resources <br /> Board 2000-2009 Greenhouse Gas Emissions Inventory. Source: California Air Resources Board,Documentation of California's <br /> Greenhouse Gas Inventory,May 24,2012,data for 2009,Category 1A3biii-Road Transportation-Heavy-duty Trucks and Buses- <br /> Distillate,available at www.arb.ca.gov/cc/inventory/doc/doc_index.php(accessed May 24,2012). <br /> 0.257 grams methane/gallon of gasoline <br /> 0.332 grams nitrous oxide/gallon of gasoline <br /> 3. Criteria pollutant emission factors include total emissions for each pollutant. In addition to running exhaust emissions,emission factors <br /> include idle exhaust emissions. PM�o and PM2.5 factors also include emissions from brake wear and tire wear. <br /> 4. Truck trip length is based on CaIEEMod emissions model defaultvalue. Source: ENVIRON International Corporation,California <br /> Emissions Estimator Model(CaIEEMod)User's Guide Uersion 2011.1,Table 4.2(Mobile Trip Characteristics Dependent on Location), <br /> data for San Mateo County urban truck length-commercial to commercial(C-C)trips, February 2011,available at www.caleemod.com <br /> (accessed May 24,2012). <br /> 5. Conversion factors: <br /> 2000 pounds/ton <br /> 453.59 grams/pound <br /> Page 12 Date: 7/30/2012 <br />