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6920 Koll Center Parkway �1 Clayton <br /> Suite 216 <br /> Pleasanton, CA 94566 <br /> 925.426.2600 GROUP SERVICES <br /> Fax 925.426.0106 2005 MAY 23 pH 9' 40 <br /> SAN JOAG-Uli'l ENVIRDNMENTATY <br /> L <br /> HEALTH DEPARTMENT <br /> May 20, 2005 <br /> Ms. Devra Lewis <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 11020 Sun Center Drive #200 <br /> Rancho Cordova, California 95670 <br /> Clayton Project No. 70-02657.00 <br /> Subject: Additional Groundwater Delineation Workplan <br /> Former Shell Central Valley Crude Oil Pipelines <br /> Hansen Road <br /> Tracy, California <br /> Dear Ms. Lewis: <br /> Clayton Group Services (Clayton)prepared the enclosed Additional Groundwater <br /> Delineation Workplan on behalf of Shell Oil Products US. The investigation is currently <br /> scheduled to start in early June, due to equipment availability. <br /> If you have any questions or comments, please call me at(925)426-2673. <br /> Sincerely, <br /> &aeurd., <br /> Senior Project Manager <br /> cc: See Distribution List <br /> PL\SAMPROlBCTS@002\02657 Shell Tr \0505wkpin\cwltrRWQCB,d <br /> www.claytongrp.com <br /> Environmental Services - Occupational Health and Safety • Laboratory Services <br />