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A,' ESTERN' GEOLOGic RESOURCES , INC . <br /> 2169 E.FRANCISCO BOULE%ARD,SUITE B <br /> SAN RAVAEL.CALIFORNIA 94901 <br /> 415,457-7505 FAX.415,457-8521 <br /> 3 Apr 1989 <br /> Julian Munoz <br /> Safeway Stores, Inc. <br /> Meat Packing Department <br /> 1111 Navy Drive <br /> Stockton, CA 95204 <br /> Re: Tank Excavation <br /> and Former Sampling <br /> Safeway Meat Packing Facility <br /> Stockton, California <br /> Dear Mr. Munoz: <br /> This letter summarizes the results of the past subsurface investigations <br /> conducted in association with the removal of 4 underground fuel storage tanks <br /> located at the Safeway Meat Packing facility, 1111 Navy Drive, Stockton, <br /> California (Figures I and 2) . The tanks were removed by Precision Industries <br /> (PI) of Stockton, California, between 6 and 10 July 1987. Weiss Associates <br /> (WA) of Oakland, California, conducted several phases of subsurface <br /> investigation and soil stockpile sampling between April 1987 and September <br /> 1988. The results of soil and groundwater sampling are presented in Tables <br /> 1 through 4 and sampling locations are presented in Figures 2 through 7. <br /> The following briefly describes the work performed. WA report dates and <br /> recipients are underlined. <br /> 10 June 1987 - Julian Munoz, Safeway <br /> On 7 and 8 April 1987, WA supervised the drilling of soil borings and <br /> collected soil samples around the underground storage tanks. The location <br /> of borings B-1 through B-9 are indicated in Figure 2. In the area of the <br /> tanks the site is underlain by low permeability silts and clays with <br /> discontinuous layers of clayey sand. Groundwater was encountered at about <br /> 16 to 17.5 ft below grade. Photoionization detector (PID) readings during <br /> drilling indicated that volatile hydrocarbons were present in soil in all <br /> borings except B-1 and B-9. The highest concentration of volatile <br /> hydrocarbons was detected at 700 ppmv in the sample collected at 19.7 ft <br /> from the bottom of boring B-8. One sample from each boring except B-9 was.. <br /> analyzed by Brown and Caldwell Laboratories (B&C) of Emeryville, <br /> California, for total fuel hydrocarbons (TFH) and benzene, toluene and <br /> 57 xylene (BTX) . Analytic results are presented in Table 1 . TFH at 1100 <br /> ppm were only detected in the sample collected from boring B-2 at 20.7 ft <br /> below grade. BTX were not detected in any samples. <br /> 10 August 1987 - Julian Munoz, Safeway <br /> Between 6 and 10 June 1987, the four underground fuel storage tanks were <br /> removed by PI . WA personnel were present to observe the removal . Water <br />