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Daily Intake = . (Chemical Concentration)(Intake Factor) <br /> C = (A (B) J ,. <br /> Cancer Risk = (Slope Factor)(Lifetime Daily Intake) <br /> The cancer risk is calculated by multiplying the life time average daily intake by the <br /> slope factor. The life time average daily intake (Column C) is obtained by multiplying <br /> the intake factor (Column B) by the chemical concentration in media (Column A). The <br /> daily intake (Column C) is then multiplied by the slope factor(Column D) to determine <br /> a numerical estimate of excess lifetime cancer risk (Column E). <br /> The cancer risks are then summed for all of the chemicals evaluated for each exposure <br /> pathway. To determine the total carcinogenic risk to a given receptor, the cancer risks <br /> for each exposure pathway are summed. <br /> P Y <br /> 6.3 RISK CHARACTERIZATION RESULTS <br /> Chemical-specific, pathway specific, and cumulative carcinogenic risks and <br /> noncarcinogenic Hazard Indexes (HIs) ;;were calculated for each exposure scenario <br /> evaluated in the risk assessment. Results of the risk characterization are discussed in <br /> the sections below. Table 6-1 summarizes carcinogenic risk and Table 6-2 summarizes <br /> noncarcinogenic risks. <br /> 6.3.1 Carcinogenic Risk <br /> t USEPA has established a target cancer risk range of 1E-06 to 1E-04 (1 in 1,000,000 to <br /> 1 in 10,000) for evaluating the need for remedial action to protect public health from <br /> exposure to releases of hazardous chemicals. EPA guidance states that if the cumulative <br /> , ,. cancer risk does not exceed 1E-04, and noncarcinogenic effects are not of concern, then <br /> { <br /> remedial action is generally not warranted to protect public health (USEPA 1991). <br /> S:\LDC\YELLO.RPT May 4,1995 .6-6 t •' <br />