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- - -Page <br /> 2 ._._..-- <br /> December 1 , 1988 <br /> CHET DAVISS©N <br /> Soils will be sampled at the surface and at two subsurface <br /> depths , at each of the three locations. <br /> 2. Groundwater <br /> A single well will be drilled on . Woodson Estate property <br /> immediately downgradient from the hazardous waste site and <br /> as close to the Woodson Estates southern property boundary <br /> as possible. A sample will be taken from each aquifer down <br /> to the aquifer commonly used to provide drinking water in <br /> that area. <br /> Both the soil and groundwater sampling will be conducted by <br /> experienced engineering firms following appropriate <br /> sampling procedures to insure integrity of the media being <br /> sampled , and proper handling and transfer of the samples. <br /> Analytical Program <br /> The samples will be transferred to the analytical laboratory <br /> where they will be analyzed for the following compounds : <br /> carbaryl (Sevin ) , DDE , DDT, DEF , 2 , 4—D ( acid + esters) , <br /> Disyston, endosulfan, ethion. ethyl parathion , malathion , <br /> methoxychhlor , pentachlorophenol , phenol , toxaphene , <br /> _._ trichlorophenol , and trithion. These chemicals represent <br /> those identified by CDHS during their site evaluation. <br /> - - - The laboratory will be certified by the California <br /> Department of Health Services for the analysis of soil and <br /> water and will follow appropriate chain of custody <br /> procedures and required Good Laboratory Practices (GLP) in <br /> handling the samples and conducting the analysis . The <br /> level of sensitivity for each compound will be at a minimum <br /> equal to that reported by CDHS during their evaluation of <br /> the Lodi Airport Site. <br /> Risk Assessment <br /> Results of the sample analyses will be used to conduct risk <br /> assessments for those compounds identified. Each chemical <br /> found will be evaluated using procedural guidelines outlined <br /> in the CDHS Site Mitigation Decision Tree Manual ( 1986 ) . <br /> This information will be contained in a report which will <br /> assess the potential human impacts , if any , to persons who <br /> may reside on that property . <br /> Timetable <br /> Depending upon availability of firms to conduct the <br /> sampling , the risk assessment report should be available <br />