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A <br /> Delta ���;� <br /> ////Ak Consultants,EnviroInc. 1n , Sri <br /> /gyp j9 <br /> 3330 Data Drive <br /> Rancho Cordova, CA 9567091638-20 <br /> �1jT NTS <br /> FAX3916/638-85 <br /> 16 88385 <br /> August 29, 1989 <br /> Ms. Diane Hinson E, <br /> Public Health Services <br /> County of San Joaquin <br /> 1601 East Hazelton Avenue <br /> Stockton, California 95201 <br /> Subject: Addendum to Work Plan--Shell Service Station <br /> 3725 Tracy Boulevard, Tracy, California <br /> Delta Project No. 40-89-012 <br /> Dear Ms. Hinson: <br /> Delta Environmental Consultants, Inc. (Delta), is presenting an addendum to the "Proposed Work Plan <br /> for Pretank Closure Site Assessment." Soil samples taken during the investigative borings indicate the <br /> possibility of ground water being impacted by petroleum hydrocarbons. <br /> Delta proposes the drilling and installation of three monitoring wells in order to assess ground water <br /> gradient and quality at the site. Enclosed is a site map indicating the proposed locations for the <br /> three monitoring wells. These wells will be used to assess ground water quality and hydrogeologic <br /> parameters to aid in the design of the system required for dewatering the new tank excavation during <br /> new tank installation. <br /> We would like to complete this work as soon as possible, and I have tentatively scheduled the work <br /> to be done on September 9; 1989, if approval has been received from your office.. - <br /> If you have any questions concerning this project, please do not hesitate to call me at (916) 638-2085. <br /> Sincerely, <br /> DELTA NVIRONMENTAL CONSULTANTS, INC. <br /> Paul C. Andrews <br /> Geologist <br /> PCA:mjd <br /> Enclosure <br /> cc/enc: Ms. Diane Lundquist, Shell Oil Company <br /> Ms. Eleanor Ratliff, County of San Joaquin <br /> Mr. Darrell Robinson, Shell Oil Company <br /> Practical Solutions to Environmental Concerns <br />