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�� 4 22/2003 11:36 20946711' AGE STOQKTON PAGE 02/02 <br /> Advanced <br /> GeoEnvxronmental, Inc. - <br /> 22 Septet 2003 <br /> AGE-NC Project No.'97.0300 <br /> Ms.Vicki McCartney <br /> San Joaquin County Environattental.Health Department <br /> 304 East Weber'Avenue,31'Floor <br /> Stockton,CA 95202 <br /> Subject: RevWon to Work Plan Addendum,dated 03 July 2003 <br /> )PAC>IC PRIDE,VMT LANE <br /> 3230 North west Lxne,Stocktoty CA <br /> Dear Ms.McCartney: <br /> At the request of Mr. David Atwater of Vann De Pol Enterprises Inc.,Advanced GeoEnvironrnerttal, Inc. <br /> (AGE) is m9dng a revision to the San Joaquin County Environnwtal Health Department (SJCEH1))- <br /> approved Work Plan Addendum(dated 03 July 2003). <br /> In tht Work Plan Addendum-approval letter dated 09 September 2003,the'SJCEIID directed that at least one <br /> grab.water sample should be collected at depths between 60 feet and 63 feet below surface grade(bag). <br /> However, based on AGE's experience, the limitations for a Geaprobe 5400 in.the Stocktm ams is <br /> apprdycimately 50 to 65 feet bsg.'Therefore,AGE is revising the above referenced Work Plan Addendum to <br /> include utilization a tuck-mounted,hollow stem drill rig equipped with 6-inch diameter 1wllow-stem augers <br /> instead of the previously proposed Geoprobc 5400 soil probing unit.All soil cuttings generated from drilling ' <br /> activities will be stockpiled at the site and covered with plastic sheeting;stockpiled sail disposal alternatives <br /> will be evaluated based on results of soil and analysis. <br /> If you have any questions or require further information,please contact me at(209)'467-1006. <br /> Sincerely, . <br /> Advanced GeoEnvlroamental,l[nc: <br /> Timothy J.CdAar <br /> Project Geologist <br /> Enclosure <br /> cc: Mr.David Atwater,Van De Pol Enterprises <br /> Mr.Jim Barton, California Regional Water Quality Control Board•Central Valley Regicra <br /> 837 Shaw Road,Stockton,Califemia 95215 <br /> Telcphonc(209)467-1006 FAX(209)467-111s <br />