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Task 3 Prepare Additional Investigation Report and <br /> Update Site Conceptual Model <br /> An Additional Investigation Report documenting the work performed, laboratory analytical reports, <br /> evaluation of the data collected, conclusions, and recommendations will be prepared. The report will <br /> b ormy6a 1�- <br /> include a well construction log of the new borings, lithological cross-sections, chemical iso-concentration <br /> maps for soil and groundwater, updated site map and analytical laboratory results of soil and groundwater <br /> samples collected during the borehole investigation. <br /> If you have any questions concerning the proposed scope of work or costs please contact the undersigned <br /> at (925) 460-5300. <br /> Respectfully submitted, <br /> ATC ASSOCIATES INC. <br /> Peter Kolodner Scott Perkins <br /> Project Manager Senior Project Manager <br /> David A. Evans, P.G. <br /> CA Professional Geologist No. 8623 <br /> t <br /> �y\DNAL 0 <br /> Q� O <br /> a <br /> No.Ben <br /> Q <br /> N9rF DF CAt-SFDQ=\ <br /> Attachments: <br /> Figure 1 — Proposed boring Location Map <br /> Regulatory Correspondence <br /> Additional Investigation Workplan <br /> Quik Stop No. 132,Stockton,CA <br /> May 18,2009 <br /> 1 <br />