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RECENED Terra Vac <br /> VAC 1211'North Barsten Way <br /> .SAN 1. 8 �tlfl5 Anaheim;CA 92806 <br /> 714-666-1988 <br /> ALT <br /> PP <br /> May 19, 2004 <br /> Bill Bunch <br /> Circle K Stores, Inc. . <br /> 1500 North Priest Dr: <br /> Tempe;AZ 85251 DC40 <br /> RE: Circle K Store 5449 <br /> 7647 Pacific Ave. <br /> Stockton, California <br /> Dear Mr. Bunch, <br /> Terra Vac was contracted to evaluate the probability of subsurface impacts to soil and/or <br /> groundwater beneath several operating Circle K service stations. The following report <br /> summarizes site activities conducted during due diligence site assessment of the Stockton <br /> Store 5449 Store 5731, located at 7647 Pacific Ave., Stockton, California. The site <br /> location is shown on Figure 1. A total of six soil borings were advanced using a <br /> GeoprobeTm rig. <br /> Field Procedures <br /> ULS Services Corp. was contracted to use geophysical methods to conduct utility and <br /> piping clearance prior to initiating any intrusive activities. Following utility clearance in <br /> the areas of assessment the potential boring locations and any identified obstructions <br /> were marked with paint. Boring locations were selected in order to obtain representative <br /> subsurface samples across the site. On April 13, 2004, a total of 6 soil borings were <br /> advanced. Figure 2 depicts the locations of the installed borings. <br /> The first five feet of each boring were hand augered to further clear the area for utilities <br /> or subsurface obstructions. Three borings were advanced to depths of 25 feet in the <br /> vicinity of the underground storage tanks.(USTs) (B1 through B3) and three borings were . <br /> advanced to 10 feet in the vicinity of the three dispensers and dispenser lines using <br /> GeoprobeT" (135, B6, B7). Please note that Boring B4 was not installed due to safety <br /> concerns. Soil samples were collected at five foot intervals and field screened for the <br /> presence of hydrocarbons using a portable hydrocarbon vapor analyzer. Groundwater <br /> was not encountered at this site. <br /> 1 <br />