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<br />Greystar - El Camino Real and Diller St - DPM Cancer Risks From AT&T Emergency Generator <br />ISCST3 Risk Modeling Parameters and Maximum DPM Cancer Risk in Project Area <br />Future and Existing Residential Receptors <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 />MEI Cancer Risk From AT&T Emergency Generator Operation <br />Future On-Site Residents - First Floor Residences (1.5 meter receptor height) <br />Exposure Age DPM DPM <br />Duration Sensitivity Annual Conc Cancer Risk <br />(years)Age Factor (ug/m3) (per million) <br />0.25 -0.25 - 0*10 0.0037 0.05 <br />2 1 - 2 10 0.0037 1.21 <br />14 3 - 16 3 0.0037 1.34 <br />14 17 - 30 1 0.0037 0.15 <br />Total Increased Cancer Risk 2.7 <br />* Third trimester of pregnancy <br />MEI Cancer Risk From AT&T Emergency Generator Operation <br />Future On-Site Residents - Second Floor Residences (6.0 meter receptor height) <br />Exposure Age DPM DPM <br />Duration Sensitivity Annual Conc Cancer Risk <br />(years)Age Factor (ug/m3) (per million) <br />0.25 -0.25 - 0*10 0.0041 0.06 <br />2 1 - 2 10 0.0041 1.34 <br />14 3 - 16 3 0.0041 1.47 <br />14 17 - 30 1 0.0041 0.16 <br />Total Increased Cancer Risk 3.0 <br />* Third trimester of pregnancy <br />8.A. - Page 116