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i <br /> 1 <br /> Cleaning &ad The tanks were transported under manifest by Erickson to their facility in Richmond, California. There the tanks <br /> were cleaned, rendered useless, and subsequently disposed of at <br /> LMG Metals in Richmond as scrap metal (Appendix I) <br /> ERM-West, Inc. is currently awaiting the tank tracking forms, they <br /> will be submitted to the County as soon as they become available. <br /> After the tanks were removed, the sods below the tanks and ground <br /> water that collected in the excavation were sampled by ERM-West <br /> The sampling was performed according to the guidelines specified by <br /> the San Joaquin County tank removal permit (Appendix G). <br /> At 1325 West Weber, a soil sample was collected from approximately <br /> 2 feet below the bottom of the tank. The sample was collected by <br /> forcing a pre-cleaned brass tube into freshly exposed soil. A <br /> noticeable petroleum odor was noted during the sampling. Ground <br /> water was noted in the excavation and was subsequently sampled by <br /> lowering laboratory-provided containers into the water. While <br /> sampling the water, a slight sheen was noticed. <br /> At 1541 West Weber, two soil samples were collected from <br /> approximately 2 feet below each end of the tank. The samples were <br /> collected by sub-sampling scoops of soil collected by the backhoe <br /> bucket from under each end of the tank. No petroleum odor was <br /> noted during excavation and sampling Ground water was not <br /> encountered. <br /> Backfilling and Paving <br /> The tank excavations were backfilled on the same day that the tanks <br /> were removed. At 1325 West Weber, the tank excavation was lined <br /> with visqueen, then clean fill was placed in the pit. As the fill was <br /> placed, the material was compacted. The excavated material was <br /> stockpiled over the former tank area. Stockpiled soils were placed on <br /> visqueen, sampled, and covered with additional visqueen. <br /> At 1541 West Weber, the soils removed during excavation of the tank <br /> were used for backfill material. Additional clean fill material was <br /> added as needed. As the pit was backfilled, the material was <br /> compacted; the area was then paved with asphalt. <br /> I 4-4 <br />