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Prop 7.A. - Page 201 dwood City GDF Expansion <br /> Air�ua���y�������a«���a��y�,�,��alysis <br /> Appendix C: Modeling Assessment Updates <br /> Table C-4. Cumulative Health Risk Screening Analysis for Rail Corridor Near the Costco Wholesale Redwood City GDF. <br /> Notes: <br /> 1. The above table reflects standard exposure parameters for residential receptors,as presented in BAAQMD Air Toxics NSR Program <br /> Health Risk Screening Analysis(HRSA) Guidelines. <br /> 2. Hourly breathing rate for residential receptors assumes 24 hours/day. <br /> 3. Exposure duration assumes a total of 70 years exposure commencing in 2013,distributed as follows: <br /> -Caltrain: locomotive engine rebuilds will be completed in 2017(see Table C-6) <br /> -As Modeled(BAAQMD TAC Analysis)assumes 70 years exposure at current emission rates. <br /> -In vicinity of Costco Redwood City GDF assumes locomotive engine rebuilds will be completed in 2017(see Table C-6). <br /> -In vicinity of Costco Redwood City GDF after electrification assumes electrification is completed by 2025. <br /> -Freight rail: freight locomotives are rebuilt about every 10 years[Rolling Stock: Locomotives and Rail Cars-Industry&Trade <br /> Summary(publication No. Publication ITS-08), U.S. International Trade Commission-Office of Industries,March 2011,page 26, <br /> available at www.usitc.gov/publications/332/ITS-08.pdf(accessed March 26,2012)]. Assuming previous rebuilds prior to the 2008 <br /> locomotive emission standards effective date(July 7,2008),freight locomotive engine rebuilds in compliance with the 2008 standard <br /> will be completed by 2018. <br /> -Dumbarton Rail Corridor: assume start of passenger rail service in 2018. <br /> Page 7 Date: 7/30/2012 <br />