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0 <br />b. In the event the presence of an off-site contaminant <br />plume is substantiated, extraction from the tank area <br />may draw the contaminants into the capture zone of <br />MW#1. We recommend prior sampling of the existing MW#1 <br />and MW#2 by EPA 601/602 and TPH, Volatiles. <br />5. Laboratory detection limits proposed for the verification <br />samples were not included in the workplan. Submit the limit <br />of quantification proposed during excavation. <br />6. Contaminants remaining at the conclusion of the excavation <br />attempt shall be addressed in a Soils Remediation Plan. <br />This remedial plan can be prepared in concert with the <br />groundwater investigative results and should include at <br />least three options. The Soils Remediation Plan should <br />include a feasibility study for each option proposed. <br />If you have any questions, contact Darlene Reuss of my staff at <br />(209) 468-3450. <br />Jogi Khanna, M.D., M.P.H. <br />District Health Officer <br />R n"V inoti, Director <br />Environmental Health Division <br />RV/DR:dr <br />cc: RWQCB, Region 5 <br />Canonie Environmental, Elliot Bruhl <br />