Laserfiche WebLink
TANK CLOSURE REPORT <br />2320 EL Dorado, Stockton, CA <br />Aegis Project No. 89-049 <br />Page 10 <br />Table <br />ANALYTICALSOIL • . <br />StockpileMaterial/Existing <br />Tank Basin <br />Results reported in Parts Per Million (P M <br />Sample ID TotalPetroleum Hy• a •• •matic Volatile Organics <br />No- <br />G EDB benzene toluene• - <br />Comp Soil ND ND ND ND ND ND <br />Pile <br />SP -(A-E) ND ND ND ND ND ND <br />SP -(F -I) ND ND ND ND ND ND <br />ND = not detected <br />Material• Tank Basin <br />GasolineA-E = Sample ID's from which composites were made <br />TPH = Total Petroleum Hydrocarbons <br />EDB= Ethyl DiBromide <br />BTEX = Benzene, Toluene, Ethyl Benzene, total Xylenes <br />Note: Samples were composited in the laboratorye <br />Detection <br />0.005 <br />ra • <br />4.0 PROPOSED O. <br />soilsAegis proposes, as an interim remediation option, over -excavation of <br />. a maximum depth of 5 feetbelow • ..- in the areadefined <br />as <br />containing petroleum hydrocarbons. Excavation to a depth greater than <br />5 feet below grade will endanger the structural integrity of the <br />canopy. The area targeted for over -excavation was defined by <br />laboratory analysis of grab samples obtained during exposure by <br />backhoe. The area is confined to a region immediately beneath the <br />product dispensing island nearest the station store. The excavated S1 <br />r.. will be stockpiled in accordance with countyand state <br />regulations• i sampled for determination i disposal - i •: <br />If the limits of the excavation do not remove all detectable petrole <br />hydrocarbons, then a vapor extraction well will be permitted and <br />installed. The extent of soil containing petroleum hydrocarbons will <br />thus be defined. <br />