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4 CONCLUSIONS AND RECOMMENDATIONS <br /> ' 4.1 Conclusions <br />' The analytical data for the former Nestle site in Stockton, California indicates that the <br /> petroleum hydrocarbon compounds found in the soil are limited in depth and extent <br /> Twelve soil samples were collected In November 1994 and only one soil sample was <br />' impacted Groundwater samples collected from the on site monitor>_ng well do not <br /> indicate any impacts <br />' The present soil conditions were modeled to determine the potential for the petroleum <br /> hydrocarbon compounds to migrate to groundwater The modeling showed that the <br /> compounds detected in the soil are expected to take more than 10,000 years to reach <br />' groundwater and that their concentrations would be less than their respective drinking <br /> water standards <br /> The remedial alternatives evaluation indicates that the "no action" alternative is <br /> appropriate for this site This conclusion is based on the fact that the soil excavation and <br /> disposal alternative would be prohibitively expensive and would only serve to move the <br /> impacted soil to another location (landfill) The soil excavation and incineration <br /> alternative would be even more expensive, and the potential benefits to human health and <br /> the environment would not improved over those of the no-action alternative The <br /> ' groundwater monitoring alternative will not yield conclusive results because of the <br /> extended length of time it would take for the source to reach the groundwater Therefore, <br /> "no action" is the appropriate alternative for this site <br /> 4.2 Recommendation <br />' Based on the results of the model and the discussion of other alternatives, EMCON <br /> recommends no further action for the Site <br /> 1\PMRXK00285 DOC-951 lc 1 Rev 0 8/28/95 <br /> 22074-001 001 4-1 <br /> 1 <br />