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6920 Koll Center Parkway �� <br /> Suite 216 Clayton <br /> Pleasanton, CA 94566 <br /> 925.426.2600 G R O U P 5 E R V I C E 5 <br /> Fax 925.426.0706 <br /> �EC�E-�]�9F,© <br /> JUL 2 3 2003 <br /> July 22, 2003 <br /> ENVIRumvitlV I r,EALTH <br /> PERMIT/SERVICES <br /> Ms. Devra Lewis <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road, Suite A <br /> Sacramento, California 95827 <br /> Clayton Project No. 70-02657.00 <br /> Subject: Additional Investigation Report <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 Delineation report on <br /> behalf of Shell Oil Company. The investigation was performed by Shell pursuant to a <br /> workplan dated May 19, 2003. <br /> If you have any questions or comments,please call me at (925) 426-2673. <br /> Sincerely, <br /> U M <br /> Michael Hurd, <br /> Senior Project Manager <br /> cc: Mr. Iry Jenkins, Shell Oil company <br /> Mr. Mike Infurna, San Joaquin County Environmental Health Department <br /> Mr. David Corliss, Golden State Developers <br /> Ms. Eileen Nottoli, Allen Matkins Leck Gamble & Mallory <br /> PUS'.Mi ROMCTS2WM2657 Shell TreW0903ep� ,c ,RWQCB.doc <br /> www.claytongrp.com <br /> Environmental Services • Occupational Health and Safety - Laboratory Services <br />