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r <br />u <br />u <br />0 <br />n <br />0 <br />G <br />11 <br />GRA YLAND ENVIRONMENTAL VIRO1 r1Y1E1 r l AL CONSULTING SERVICES <br />March 20, 1998 <br />022-160 <br />Mr. Michael Walton <br />Walton Engineering, Inc. <br />P.O. Box 1025 <br />West Sacramento, California 95691 <br />Subject: Underground Storage Tank Removal Report <br />West Lane Fuels <br />3300 West Lane, Stockton, California <br />Dear Mr. Walton: <br />At the request of Walton Engineering, Inc., of West Sacramento, California, a registered geologist <br />from Grayland Environmental (Grayland) arrived at the West Lane Fuels property (site) located at <br />3300 West Lane in Stockton, California, on November 21, 1997, to assist with the removal of three <br />underground storage tanks (Figure 1). Grayland collected individual soil samples for laboratory <br />testing from beneath each of the former underground fuel storage tanks and from beneath fuel <br />dispensers and underground piping. Soil sample composites were collected from the soil stockpiles, <br />which were generated during the tank removal work. <br />Grayland returned to the site on November 26, 1997, to collect soil samples from the base and two <br />sidewalls of an area within the tank excavation, which was overexcavated to a depth of <br />approximately 24 feet below ground surface. On December 2, 1997, Grayland returned to the site <br />to collect four soil samples from beneath an abandoned underground product pipeline, which at one <br />time supplied fuel to dispensers formerly situated along Alpine Avenue. <br />SITE DESCRIPTION AND BACKGROUND <br />The site was occupied by the West Lane Fuels sales office and convenience store. West Lane Fuels <br />stored three grades of unleaded gasoline for retail sale in three underground storage tanks at the site. <br />The underground storage tanks were situated side by side near the northern boundary of the property <br />(Figure 2). Two of the underground storage tanks had capacities of approximately 8,000 gallons, <br />while the storage tank used to store regular unleaded gasoline had a capacity of approximately <br />10,000 gallons. Fill ports were located at the southern ends of the underground storage tanks; fuel <br />dispensers were located southwesterly of the three storage tanks along West Lane. The single-wall, <br />carbon steel underground storage tanks did not have overfill protection and were not wrapped. The <br />storage tanks apparently were installed during the early 1970's. <br />2731 Quail Street Davis, California 95616 (916) 756-1441 <br />Grayland 022-160.trr 1 March 20, 1998 <br />