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' Tank Removal.and Rkamal <br /> "`The tanks will be uncovered and removed with a backhoe. After a <br /> tank has been removed from the ground, the tank will be visually <br /> inspected for general condition and potential leaks. The tanks and <br /> 4ttendant piping will be transported from the sites under manifest by <br /> 1/Dobbas (U.S. EPA ID No. CAD 981982994) to Erickson, Inc. (U.S. EPA <br /> t ID No. CAD 009466392) located in Richmond, California. Erickson <br /> will be responsible for destruction and final disposal of the tanks. <br /> ' Erickson will issue a certificate of tank destruction. <br /> Backfilling <br /> After the tank excavations are sampled (see below), the excavations <br /> will be immediately backfilled with clean material. If appropriate, <br /> the tank excavations will be lined with Visqueen prior to backfilling.. <br /> The backfilling will commence immediately because the open <br /> ' excavation could affect the stability of the warehouse building at 1325 <br /> West Weber and because the stability of the tank excavations could be <br /> affected by truck traffic. <br /> The material removed from each tank excavation will be stockpiled. <br /> Each stockpile will be staged on Visqueen and will be covered with <br /> the same material. Prior to final covering, the stockpiles will be <br /> sampled. If the results of the laboratory testing are below regulatory <br /> limits, the stockpile(s) will be disposed of in a Class III landfill. If <br /> test results exceed regulatory limits, the material will remain on site <br /> ' pending the completion of an investigation of the tank site(s) and <br /> determination of remedial measures. <br /> ' Soil and Groundwater Sampling <br /> ' After the tanks have been removed from the excavations, the soils <br /> under the tanks will be sampled by ERM-West, Inc. If there is a <br /> significant amount of groundwater in the excavation, the <br /> ' groundwater will also be sampled. <br /> Soil lin <br /> Soil samples will be collected with the aid of a backhoe. The backhoe <br /> ' will be used to excavate a small trench to approximately two feet <br /> below the bottom of the tank, near each of the tank ends. The backhoe <br /> will then remove soil from the base of the excavation for sampling. <br /> The soils in the backhoe bucket will be sampled by pushing a pre- <br /> cleaned brass tube into the soil mass until the tube is filled. Tubes <br /> will be sealed by placing Teflon film over the ends and securing it in <br /> 2-2 <br />