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Ms Lori Duncan <br /> Page 4 of 5 <br /> Two 4-tube composite samples from the stockpiled soil were collected for waste profiling purposes. <br /> The samples were submitted under chain of custody to McCampbell for analysis. <br /> The suite of analyses for the excavation confirmation samples consisted of total petroleum <br /> hydrocarbons as gasoline (TPHg) using EPA method 8015; total oil and grease (TOG) using method <br /> 5520; benzene, toluene, ethylbenzene and xylenes (BTT-X') using EPA method 8020; and volatile <br /> organic compounds (VOC's) including gasoline oxygenate additives using EPA method 8260. Per <br /> landfill requirements, composite soil samples collected from the soil piles were analyzed for TOG and <br /> for semi-volatile organic compounds(SVOC)using EPA method 8270. <br /> Analytical Results <br /> No target analytes were detected in the confirmation soil samples collected from the excavation. <br /> Composite samples from the soil stockpiles contained low levels of TOG and semi-volatile <br /> constituents. Analytical results for soil samples are summarized in Table 3. Laboratory data <br /> sheets and chain of custody documentation are included in Attachment B. <br /> CONTAMINATED SOIL DISPOSAL <br /> On December 1, 2000, the soil generated from the excavation (214.76 tons) was transported to <br /> . Forward Landfill in Manteca California for disposal. Copies of weigh tickets and non-hazardous <br /> waste manifests are included in Attachment C. <br /> SUMMARY <br /> • Approximately 165 cubic yards of soil was removed from the former UST location by <br /> excavation. The soil was disposed of at Class II Forward Landfill. <br /> • The lateral and vertical extent of contamination has been defined and all impacted soil was <br /> removed by excavation. <br /> • No detectable amounts of target analytes were found in the confirmation soil samples collected at <br /> 10, 17 and 18 feet bgs along the northern and eastern sidewalls of the excavation. No detectable <br /> amounts of target analytes were found in the soil borings previously installed peripheral to the <br /> tank-pit, <br /> • Soil samples from directly beneath the former UST at two consecutive depths (17 and 20 feet <br /> bgs) were non-detect for all analytes. <br /> CONCLUSIONS <br /> The lateral and vertical extent of soil contamination defined by the initial subsurface investigation <br /> has been confirmed. Contaminated material did not extend laterally beyond the confines of the <br /> tankpit. <br /> Nsauto/reports/excaysum.doc <br />