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<br />El Camino & Diller, Redwood City, CA - 1st Floor Receptors (1.5 meter receptor height) <br />ISCST3 Railroad DPM Risk Modeling Parameters and Maximum Cancer Risk at Project Site <br />Caltrain Without Electrification - Diesel-Powered Passenger and Freight Trains <br />Cancer Risk Calculation Method <br />Cancer Risk (per million) = CPF x Inhalation Dose x ASF x ED/AT x FAH x 1.0E6 <br />Where: CPF = Cancer potency factor (mg/kg-day)-1 <br />ASF = Age sensitivity factor for specified age group <br />ED = Exposure duration (years) <br />AT = Averaging time for lifetime cancer risk (years) <br />FAH = Fraction of time spent at home (unitless) <br />Inhalation Dose = Cair x DBR x A x (EF/365) x 10-6 <br />Where: Cair = concentration in air (μg/m3) <br />DBR = daily breathing rate (L/kg body weight-day) <br />A = Inhalation absorption factor <br />EF = Exposure frequency (days/year) <br />10-6 = Conversion factor <br />Values <br />Cancer Potency Factors (mg/kg-day)-1 <br />TAC CPF <br />DPM 1.10E+00 <br />Infant/Child Adult <br />Age -->3rd Trimester 0 - <2 2 - <16 16 - 30 <br />Parameter <br />ASF 10 10 3 1 <br />DBR* = 361 1090 572 261 <br />A = 1 1 1 1 <br />EF = 350 350 350 350 <br />ED = 0.25 2 14 14 <br />AT = 70 70 70 70 <br />FAH = 1.00 1.00 1.00 0.73 <br />* 95th percentile breathing rates for infants and 80th percentile for children and adults <br />Rail Locomotive Cancer Risk by Year - Maximum Impact Receptor Location <br />Exposure Age DPM DPM <br />Exposure Duration Sensitivity Annual Conc Cancer Risk <br />Year Year (years)Age Factor (ug/m3) (per million) <br />0 2020 0.25 -0.25 - 0*10 0.0169 0.230 <br />1 2020 1 1 10 0.0169 2.782 <br />2 2021 1 2 10 0.0164 2.692 <br />3 2022 1 3 3 0.0164 0.424 <br />4 2023 1 4 3 0.0164 0.424 <br />5 2024 1 5 3 0.0164 0.424 <br />6 2025 1 6 3 0.0164 0.424 <br />7 2026 1 7 3 0.0080 0.206 <br />8 2027 1 8 3 0.0080 0.206 <br />9 2028 1 9 3 0.0080 0.206 <br />10 2029 1 10 3 0.0080 0.206 <br />11 2030 1 11 3 0.0080 0.206 <br />12 2031 1 12 3 0.0080 0.206 <br />13 2032 1 13 3 0.0080 0.206 <br />14 2033 1 14 3 0.0080 0.206 <br />15 2034 1 15 3 0.0080 0.206 <br />16 2035 1 16 3 0.0080 0.206 <br />17 2036 1 17 1 0.0033 0.009 <br />18 2037 1 18 1 0.0033 0.009 <br />19 2038 1 19 1 0.0033 0.009 <br />20 2039 1 20 1 0.0033 0.009 <br />21 2040 1 21 1 0.0033 0.009 <br />22 2041 1 22 1 0.0033 0.009 <br />23 2042 1 23 1 0.0033 0.009 <br />24 2043 1 24 1 0.0033 0.009 <br />25 2044 1 25 1 0.0033 0.009 <br />26 2045 1 26 1 0.0033 0.009 <br />27 2046 1 27 1 0.0033 0.009 <br />28 2047 1 28 1 0.0033 0.009 <br />29 2048 1 29 1 0.0033 0.009 <br />30 2049 1 30 1 0.0033 0.009 <br />Total Increased Cancer Risk 9.6 <br />* Third trimester of pregnancy <br />8.A. - Page 108