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' 1.3.2 Soil Contamination <br /> Findings from Barber's sampling indicated non-detect or very low levels southeast of the <br /> block wall containment but a strong presence adjacent (within 5 FT) to the wall in the area <br /> noth of the loading rack Contamination with headier fractions (extractable C10-C36) <br /> was found in soil, ranging upwards to 14,000 mglkg at 12 FT bgs A scaled and <br /> ' updated site map with boring locations identified and a compilation of the November 22, <br /> 2004 sampling findings may be found attached <br /> While heavier hydrocarbon levels were found in tested sod samples, Kerosene (C-10-C16), <br /> tested for in all samples, was not found <br /> 9.3 3 Groundwater <br /> This brief study did not sample ground water, only shallow soil Quarterly ground water <br /> sampling continues with the most recent testing in September 2004 and the next scheduled <br /> ' for late December 2004 <br /> 14 Other findings <br /> The E5E trench excavation contained a 1" site water line adjacent to the fence at a depth <br /> ' of about 2 FT Uppermost soil tends to be cleaner sand It is not self supporting If not <br /> supported a lay back of greater than 1 1 caving must be anticipated <br /> 1.5 Conclusion <br /> This brief report offers limited information about shallow soil contamination to be <br /> considered prior to excavation in the vicinity east of the concrete block walled <br /> containment area It is offered as additional information and is not seen as a substitute for <br /> ' plume ground water definition <br /> ' Shallow but significant contamination exists adjacent to the block wall in sandy material <br /> Complete excavation of shallow highly contaminated sod will, at the least, undermine the <br /> eastern block wall segment and likely impact on the foundation structures of the <br /> operational vertical tanks within the containment area <br /> • <br />