Laserfiche WebLink
5.4 HRA RESULTS <br />' Soil and ground water data were compared to the risk-based screening <br /> levels described in the preceding section The results of these <br /> comparisons are discussed below <br /> 5.41 Soil <br />' Soil data from both the excavation confirmation sampling and the post- <br /> excavation investigation were compared to the risk-based screening levels <br /> for soil All detected concentrations were below the calculated screening <br /> levels Table 13 summarizes the comparison of the maximum detected <br /> soil concentrations and the calculated screening levels Based on this <br /> comparison, residual constituents in soil are not expected to pose an <br /> unacceptable risk under current and realistic future land use conditions, <br /> including construction, at the former tank sites <br /> The risk-based screeninglevels developed in this analysis do not consider <br /> P Y <br />' cumulative exposures to multiple constituents However, cumulative <br /> exposures to soil constituents are not expected to pose an unacceptable <br /> risk under a construction scenario for the following reasons <br /> C Residual soil constituents were detected infrequently, <br /> o The opportunity for exposure to soil constituents is limited, and <br />' o The calculated screening levels far exceeded any of the reported <br /> constituent concentrations <br /> t5.4.2 Ground Water <br />' Ground water monitoring data from the most recent round of ground <br /> water sampling (29 February 2000) were compared to the risk-based <br /> screening levels for ground water All detected concentrations were <br /> below the calculated screening levels Table 14 summarizes the <br /> comparison of the maximum detected ground water concentrations and <br />' the calculated screening levels Based on this comparison, residual <br /> constituent concentrations in ground water are not expected to pose an <br /> unacceptable risk under current and realistic future land use conditions, <br />' including construction, at the former tank sites <br /> As noted above for soil, the risk-based screening levels for ground water <br />' do not address potential cumulative exposures to multiple constituents <br /> However, cumulative exposures to ground water constituents are not <br /> anticipated to pose an unacceptable risk for the reasons stated below <br />' ERM 23 HEINZ USA-3374 50-3/27/DD <br />