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- D PHONE 285 2400 <br /> t/' ¢ CABLE ADDRESS TI7lOIL. <br /> SEATTLE T / (FAX) 206 283-8036 <br /> TACOMA EH <br /> PORTLAND <br /> STOCKTON _Il I Tb <br /> RENO 2 <br /> LOS ANGELES �� �43 ON <br /> OIL O <br /> RICHMOND 7 6 5 r6 <br /> 2737 WEST COMMODORE WAY SEATTLE, WA 98199-1233 <br /> PRODUCTS T PO BOX 24447 SEATTLE, WA 98124-0447 <br /> TIME TESTED ME <br /> September 24, 1992 <br /> Mx' Michael Collins 9F <br /> Rgy <br /> San Joaquin County Public Health Services <br /> Environmental Health Division SEP 2 8 1992 <br /> P 0 Box 2009 <br /> Stockton, California 95201 ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> RE Soil Vapor Survey Report <br /> Jackpot Food Mart, 14000 E Highway 8, Lockeford, California <br /> Property No 04-049 (� <br /> Dear Mr Collins ev tj <br /> This letter has been prepared to provide you with information regarding the <br /> • completion of a soil vapor survey at the above-referenced site The soil vapor <br /> survey was performed by Environmental Control Associates and consultant services <br /> were provided by Canonie Environmental Please find enclosed Canonie's "Soil <br /> Vapor Survey Report with Proposed Boring and Well Locations" which documents site <br /> conditions and contains analytical reports <br /> On September 17, 1991, three underground storage tanks were removed from the <br /> above-mentioned property as part of a facility upgrade Soil samples collected <br /> from the floor of the tank excavation indicated the presence of gasoline at <br /> concentrations ranging from "non-detect" to 8,700 ppm No contamination was <br /> indicated in samples collected from beneath the former pump islands A summary <br /> of analytical results generated during the tank pull is included in the attached <br /> report <br /> During the removal of the tanks, approximately 150 cubic yards of slightly <br /> contaminated fill material were removed from the excavation and placed on plastic <br /> sheeting on the east edge of the property Analysis of six soil samples <br /> collected from the stockpile indicated that gasoline concentrations levels ranged <br /> from "non-detect" to 2700 ppm Because contamination within the fill sand was <br /> significantly lower than that encountered within the tank excavation, it was used <br /> to backfill the excavation Remediation of the contaminated fill will be <br /> conducted concurrently with cleanup of the former tank excavation <br /> On August 26, 1992, a soil vapor survey was performed in the area of the former <br /> tanks to assist in the determination of the lateral and vertical extent of <br /> contamination prior to the placement of soil borings and installation of vapor <br /> extraction wells During site activities, soil vapor samples were collected from <br /> depths of 4 feet to 13 feet in probes advanced at 13 locations Every attempt <br />