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PHONE 285-2440 <br /> CABLE ADDRESS TIMOIL <br /> SEATTLE rE {FAX) 206-283-8036 <br /> TACOMA R <br /> PORTLAND <br /> STOCKTON I2 1 TO <br /> RICHMOND <br /> RENO 9 3 ORE <br /> LOS ANGELES TIME O I L C O O <br /> 8 4 i <br /> 7 s s TS 2737 WEST COMMODORE WAY SEATTLE, WA 98199-1233 <br /> RODUCTS <br /> T, PO BOX 24447 SEATTLE WA 98124 <br /> TESTED <br /> TIMEP -0447 <br /> U <br /> September 24, 1992 <br /> yxcLU <br /> Mr Michael Collins O <br /> San Joaquin County Public Health Services <br /> Environmental Health Division SEP 2 g 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, 1434 W Yosemite, Manteca, California <br /> Property No 04-167 <br /> Dear Mr Collins <br /> This letter has been prepared to provide you with information regarding the <br /> f. 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 19, 1991, three underground storage tanks were removed from the <br /> above-referenced property as part of a facility upgrade Laboratory analyses <br /> indicated that gasoline was present in the samples collected from beneath the <br /> west end of the 12,000 gallon tank and the north pump island at 460 ppm and <br /> 13,000 ppm, respectively None of the other samples contained detectable <br /> concentrations of the gasoline or its constituents A summary of analytical <br /> results generated during the tank pull is included in the attached report <br /> On August 27, 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 <br /> groundwater monitoring wells During site activities, soil vapor samples were <br /> collected from depths of 9 feet and 15 feet in probes advanced at 9 locations <br /> Figure 3 - Soil Vapor Survey Sampling Location Plan of Canonie's report <br /> identifies the location of each sampling point <br /> Analysis of vapor samples collected from each of the probe locations suggest that <br /> soil contamination is limited to the area immediately surrounding the north pump <br /> island, based on the analytical results of soil samples collected during the tank <br /> removal, this pattern of contamination was expected The results of the soil <br /> l� vapor survey did not indicate that contamination has migrated offsite <br /> Groundwater was not encountered in any of the sampling probes <br />