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ti <br /> i <br /> Delta <br /> Environmental <br /> Consultants, Inc. j <br /> 3330 Data Drive <br /> Rancho Cordova, CA 95670 <br /> 916/638-2085 <br /> FAX:916/638-8385 <br /> ; <br /> I <br /> I <br /> i <br /> July 3, 1990 <br /> I <br /> Mr. Harlin Knoll <br /> i <br /> Public Health Services <br /> Environmental Health Division <br /> San Joaquin County <br /> P.O. Box 2009 <br /> 1601 East Hazelton Avenue <br /> Stockton, California 95201. <br /> I <br /> Subject: Ground Water Monitoring Well Abandonment <br /> 3725 Tracy Boulevard, Tracy, California <br /> Delta Project No. 40-89-012 <br /> Dear Mr. Harlin: <br /> j <br /> As you requested during our phone conversation on July 3, 1990, this letter describes the scope of <br /> work to be conducted at the above-referenced site. Work will begin on July 5, 1990, and will include <br /> the abandonment of three ground water monitoring wells to a depth of 22 feet below grade. The <br /> wells will be properly destroyed by removing all material within the original borehole (including the x <br /> well casing, screen, filter pack, and annular seal). This will be performed by use of a hollow-stem <br /> auger drilling method. The created borehole will be appropriately sealed with Portland cement with <br /> 5 percent bentonite. The seal material will be trimied and pressure grouted. <br /> If you have any question regarding this project, please contact Jim Brownell at (916)III 638-2085. <br /> II F <br /> Sincerely, ilrlls <br /> DELTA ENVIRONMENTAL CONSULTANTS, INC. M <br /> I <br /> Charles Keoni Almeida i <br /> Geologist <br /> i <br /> CKA:ecd <br /> i` <br /> I <br /> SII <br /> ; <br /> I <br /> I <br /> I i <br /> Practical Solutions to Environmental Concerns <br />