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sftrol saf, <br /> KEI-P89-1104 .P1 <br /> November 22, 1989 <br /> Page 2 <br /> 2 . Site Description: <br /> The service station site occupies the southwest corner at <br /> the intersection of Pacific Avenue and Willora Road in <br /> Stockton, California. A Site Plan is attached. <br /> PROPOSED FIELD WORK <br /> PHASE I - FUEL TANK PIT EXCAVATION (SOIL REMEDIATION) <br /> 1. KEI proposes first excavation of the fuel tank pit to a <br /> depth of 16.5 feet. In addition, KEI proposes additional <br /> soil samples be taken beneath sample points A2 and B2 to the <br /> maximum excavator depth capability (approximately 20 to 23 <br /> feet) to define the vertical extent of the soil contamina- <br /> tion. The undisturbed samples will be collected from bulk 17 <br /> material excavated by backhoe. The sam le 1 be placed , <br /> in clean, 2" diameter brass tubes, sealed with aluminum <br /> foil, plastic caps and tape, and stored in a cooled ice <br /> chest for subsequent delivery to a certified laboratory. <br /> 2 . After sampling, the half of the fuel tank pit beneath sample <br /> point A2 and B2 will be excavated to the depth of the <br /> additional pit bottom samples. All excavated soil will be <br /> stockpiled on-site for further sampling. <br /> 3 . KEI further proposes to define the lateral extent of <br /> contamination by collecting tank pit sidewall samples at an <br /> interval not to exceed one sample per 20 linear feet of <br /> original tank pit perimeter. The undisturbed samples will <br /> again be collected from bulk material excavated by backhoe <br /> as described above. After sampling, the tank pit walls will <br /> be excavated laterally to the sample points, with excavated <br /> soil stockpiled on-site for further sampling. <br /> 4 . All tank pit bottom and sidewall samples will be analyzed <br /> for TPH as gasoline (5030/8015) , BTX&E (5030/8020) , TEL <br /> (DHS-LUFT) , and EDB (DHS-AB1803) in accordance with San <br /> Joaquin Local Health District guidelines. <br /> 5. All excavated soil stockpiled on-site will be sampled to <br /> determine appropriate disposition. One composite sample <br /> will be collected from each 50 cubic yards of stockpiled <br /> soil. Each composite sample will consist of two individual <br /> grab samples taken at various locations and depths from 1 to <br /> 2 feet, and will be composited by the laboratory as one <br /> sample. Composite samples will be analyzed for TPH as <br /> gasoline and BTX&E. All excavated hazardous material, as <br />