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<J <br /> Soon K Kim <br /> Page 2 <br /> All of the above discussedworkis investigative and PHS/EHD is directing you to <br /> continue with the investigation so that decisions on the best remedial <br /> alternative can be made. In addition to the above discussed work, aquifer tests <br /> should be performed so that hydraulic control of the groundwater contaminant <br /> plume can be addressed in the final remedial plan. <br /> All of the above investigative work should be completed by January 1, 1995. CH2M <br /> Hill has submitted a workplan for the piezometers, extraction wells, and air <br /> sparge wells and the additional monitoring wells can be included with an addendum <br /> to that work plan. If push point sampling is to be conducted in order to decide <br /> the placement of the monitoring wells, then it should be proposed and conducted <br /> as soon as possible. Efforts to obtain encroachment permits from the City of <br /> Stockton for work in their-right of way should begin immediately. <br /> j According :to the groundwater pumping records for Del Monte' s production wells <br /> that were provided to PHS/EHD, pumping began in March of 1992 and 1993, so the <br /> dates for submittal of the..Final Remediation Plan (Corrective Action Plan) and <br /> implementation of the plan :should not be extended at this time. <br /> If you. have any questions contact Margaret Lagorio at (209) 468-3449. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Ma�Et La o ioeal Senior REHS .Diane M. Hinson, RENS <br /> II Site Mitigation Unit Supervisor . <br />+; ML - - <br /> i <br /> Enc <br /> C: Pillsbury Madison & Sutro - Rona Sandler - <br /> C: CH2M Hill .- Grant Stewart , <br /> c: CVRWQCB - Beth Thayer <br /> 4'4 <br /> i <br /> Ilk" <br /> " <br /> V <br /> :1 <br />