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CrIMPENC <br /> 3.0 sITE <br /> nvvFsIIGATioly <br /> This section describes the proposed methodology for fiuther evaluating the extent of <br /> Petroleum hydrocarbon Impacted soil and for conducting groundwater monitoring at the site <br /> Included in this section are descriptions of the proposed field methods and procedures, <br /> ' laboratory analysis, and storage and disposal of investigation derived wastes <br /> 3.1 Soil Evaluation <br /> The following section discusses the methods and procedures that will be used in <br /> fi rther evaluating the condition of the soils surrounding the former USTs <br /> 3 1 1 Borehole Location <br /> To assess the extent of the <br /> impacted soil, four boreholes will be dulled at the locations <br /> shown in Figure 4 These borehole locations are based on the results of the previous <br /> investigations and the recommendations of the San Joaquin County PHS/EHD (Appendix A) <br /> fie The soil borings will be drilled using a truck mounted drill rig equipped with hollow stem <br /> augers (HSA) All non-dedicated drilling and sampling equipment will be cleaned according <br /> to Versar's standard decontamination procedures outlm�4-m Appendix B Each boring will be <br /> drilled to the groundwater surface at approximately 50 feet bgs Prior to any drilling <br /> activities, Versar will obtain all required permrtg"'�It is Versar's understanding that the only <br /> permit required is a borehole drilling permit from San Joaquin County PHS/EHD ' <br /> r3 12 Soil Sampling <br />' To evaluate soil conditions, soil samples will be collected at a maximum of five feet <br /> intervals for laboratory analysis Soil samples will be collected in decontaminated brass tubes <br /> Iplaced inside a split spoon drive sampler The Versar site supervisor will ensure that the <br /> sampler and the brass tubes are thoroughly cleaned prior to collecting each sample Versar's <br /> soil sampling procedures are included in endix B and will be adhered to during the <br /> investigation, any variation from these procedures will be documented in the field notebook <br /> r� <br /> f 7 <br />