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.l <br /> GeofogicafTechnics Inc. <br /> 2741 River Road _ <br /> Modesto,ca(,fo is 95351 <br /> /-. (209)538-6424/jaX#538-5852 <br /> 1 I I <br /> Work Plan <br /> Additional Site Characterization <br /> C & B Equipment <br /> L; 7474 West 11th Street <br /> Tracy, California <br /> Cj Project No. 336.2 <br /> July 15, 1996 <br /> C it <br /> i <br /> 1.0 ADDITIONAL SITE CHARACTERIZATION <br /> COn behalf of C &B Equipment Geological Technics Inc. responds to the San Joaquin County <br /> Public Health Service June 4, 1996 correspondence directing that a work plan be submitted to <br /> further investigate the extent of contamination. It is the intention of this Work Plan to <br /> Cpropose techniques and methodology that will offer site specific data in order to better <br /> qualify the risk at this site. <br /> C To further investigate the extent of gasoline range petroleum hydrocarbons in the <br /> groundwater, Geological Technics Inc. proposes to: <br /> • drill soil borings and collect soil and discrete groundwater samples from each, <br /> • test selected soil samples for geotechnical parameters to evaluate fate and transport <br /> C considerations, <br /> • install one groundwater monitoring well screened across the water table in the down <br /> C gradient direction, <br /> • install one deeper screened groundwater monitoring well in an effort to complete lateral <br /> and vertical extent of groundwater contamination, <br /> • initiate routine groundwater monitoring that will include measuring additional parameters <br /> to evaluate the plume stability, <br /> C • perform a comprehensive well/receptor survey to include identifying all wells in a 2,000 <br /> ft radius and evaluating their construction, use, and pumping rates; with regards to the <br /> C&B domestic well, it will be sampled, sounded for depth to water/total depth, and its <br /> construction, condition, use and contaminant load (if any)will be evaluated. <br /> r The results of the investigation to date are summarized in this document,(Summary Tables- <br /> Appendix A). All of the data will be integrated and reported together once this proposed <br /> scope of work has been completed. <br /> C <br /> C t`' <br />