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• <br />Mr. Eric Jenks <br />-3- <br />• <br />17 May 2012 <br />investigations will be used to plan future investigations to define the downgradient <br />extent of Site -related chemicals of concern. <br />Central Valley Water Board staff concurs with the conclusion that the extent of 1,2-DCP <br />and 1,2,3 -TCP east of South Stockton Street and deeper than depths investigated <br />during the Phase II Investigation have not yet been evaluated and thus, the Central <br />Valley Water Board staff concurs with the work proposed in the Work Plan. By 12 <br />October 2012, please submit the results of the investigations in a site assessment <br />report. Provide at least one-week notice of field activities to allow Central Valley Water <br />Board staff to observe. <br />If you have questions or comments, please contact Siddharth Sewalia at 916-464-4658, <br />or by E-mail at ssewalia(o)-waterboards.ca.gov <br />Siddharth Sewalia <br />Water Resource Control Engineer <br />Private Sites Cleanup Unit <br />cc: Ms. Melissa Asher, Geosyntec Consultants, Oakland <br />Ms. Lori Duncan, San Joaquin County Environmental Health Department, <br />Stockton <br />KAP E. LOHaLEY SCD, P.E., cHAm I PAMELA G. OF10MC M P.E., SCEE, ExecunvE oFFMEII <br />11022 Burt Cartbw 0AYn MG, FUmho Cordaa0. CA 0WQ � wrorvr.wetder}roorda od QodaatO Nvellap <br />j n®GsG��o wren <br />