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l✓vF, <br /> J d,i <br /> Applied GeoSystems 4191-E Power Inn Road, Sacramento, CA�§56i6 (916)452-2901 <br /> • FREMONT • IRVINE • HOUSTON • BOSTON • SACRAMENTO • CULVER CITY • SAN JOSE <br /> i <br /> June 4 , 1989 <br /> 0602erat / <br /> AGS 39044-1W <br /> Ms. Eleanor K. Ratliff <br /> Registered Sanitarian <br /> San Joaquin Local Health District <br /> 1601 East Hazelton Avenue <br /> Stockton, California 95205 <br /> Subject: Addendum to Preacquistion Environmental Assessment Work <br /> Plan for Proposed ARCO Station Property, Northeast <br /> Corner of Main Street and Indiana Street, Woodbridge, <br /> California. <br /> Ms. Ratliff: <br /> This letter is to follow up on our telephone conversation of May <br /> 26 and May 31, 1988 in which we discussed the concerns or <br /> problems you had with the Work Plan No. 39044-1W and permitting <br /> for the above referenced site. Each subject we discussed is <br /> discussed below and may be considered as an addendum to the Work <br /> Plan. <br /> 1) A concern expressed was responsibility for the drill <br /> cuttings generated during this work. As mentioned on page <br /> 12 of the Work Plan, disposal or treatment of drill cuttings <br /> will be the responsibility of ARCO. Following evaluation of <br /> the analytical results of the soil samples Applied <br /> GeoSystems will recommend to ARCO what appropriate methods <br /> are feasible for disposal of the cuttings. If the cuttings t <br /> contain no evidence of hydrocarbon contamination ARCO will <br /> choose to leave the soil onsite to be disposed of or used <br /> during construction. If analytical data indicate the <br /> cuttings are contaminated ARCO will dispose of or treat the <br /> soil properly. <br /> 2) A concern was expressed on the backfilling of the soil vapor <br /> probe holes with bentonite instead of neat cement. Applied <br /> GeoSystems proposes to modify our procedure for backfilling <br /> the soil vapor probe holes for this site from backfilling <br /> with bentonite pellets to backfilling with neat cement as <br /> you have recommended. The probe holes will be backfilled <br /> with a cement, water, and bentonite slurry to within a few <br /> inches below grade. <br />