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I <br /> I f lYJ <br /> T"K CLOSME ROM <br /> 21,20 North El Dorado Street, <br /> Stockton, Caldfamis <br /> "- Aegis Project No. 89-049 <br /> Page 16 <br /> 3 4 ® SUMMARY <br /> I 1) Initial analyses of soil samples collected from within the former <br /> tankl, basin revealed detectable levels of petroleum hydrocarbons. <br /> 2) After over-excavation of approximately 150 cubic yards of soil, <br /> sample analysis confirmed that over-excavation was successful in <br /> removing hydrocarbon-bearing soil from the former tank basin. <br /> 3) Analysis of soil boring samples indicated detectable levels of <br /> j petroleum hydrocarbons within the area of the proposed new tank <br />{ - basin location. However, sampling performed during excavation of <br /> thelnew tank basin indicated non-detectable levels of petroleum <br /> hydrocarbons. <br />! 1 <br /> 1 4) Initial sampling of soils within specific areas of the product <br /> line trenches and dispensing islands revealed detectable levels <br /> n of petroleum hydrocarbons. Resampling of soil in these areas, <br /> after over-excavation, confirmed soil quality to the extent that <br /> the,I, SJCEHD allowed completion of construction of the facility. <br /> �.� <br /> "" 5) Review of analytical reports for soil samples from the new tank <br /> basin by the SJCEHD-resulted in authorization to backfill the <br /> former tank basin with sail excavated from the proposed new tank <br /> location. All remaining stockpiled soil was sampled, ' <br /> characterized and hauled to the wCCSL for disposal. <br /> 6) Ancillary laboratory reports for analysis of product-line trench <br /> soil samples by EPA method 8010 revealed the presence of three of <br /> j the'Itwenty-eight analytes of halogenated volatile organics at <br /> levels ranging from 5.0 ppb to 16.0 ppb. <br /> Ii - <br /> 1 <br /> f <br /> t <br /> i <br /> 1, <br />