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l ID : JAN 02'95 15 :34 No .005 P .05 <br /> ®RAFTr <br /> of a site remediation Performed by WHF Consultants. The Cxc<<vated hydrocarhaii- <br /> affected soils resulted from leaky underground storage tanks at the North Union Street <br /> site. `Approximately 2,400 cubic yards cif this soil are stockpiled at the West Weber <br /> Street site; the dimensions of the stockpile are approximately 125 x 260 feet and the <br /> depth Tanges from 1 to 3 feet. <br /> 1 <br /> Twenty soil samples were collected, in 40-foot intervals from fa grid'constructed on <br /> the soil stockpile in August, 1995. 77he soil samJAes were analyzed for benzene, toluene, <br /> cthylbenzene, and xylenes (BTEX) and TPH in the gasoline Mange ("f 1'H-g), kerosene <br /> range (TPH-k), diesel range (TPI -d), and cul rarigo (TPH-o) by Amcrican <br /> Environmental Network (ALN) Laboratorya Stag;-certified eflVir'carlrncntal lahoariatory- <br /> 17be results of this sampling effort. were prescrlted with the .third quarter groundwater <br /> sampling results from the North Union Street site (10-' Kaiser, 1995). <br /> Two of the 20 soul samplu.-i.collucted -had TPH concentrations exceeding the <br /> ro )oSCCI soil cle�uau 1i;vuls of 100 ni ► k g ail) 1 000 m T/k T for TPH—d and TPH-o a <br /> P f � P � � ' � b b , r <br /> respectively. Sail sample CS-13 had 5,500 anb/kg of TPH-d and 11,000 jng/kb of"1TP1I.-o; <br /> sample CS-2 had 180 mg/kg TPH-d. Based ion the grid spacing, the amount of soil � <br /> .E: 4 <br /> represented by these samples is estimated to he ap}�rctx,niately 300 cubic yards, assuming <br /> 11 15% volume expansion accompanying movement of the soil. <br /> The fallowing section presents a plait for remediation of the 300 cubic yards of <br /> Class 11 waste with TPH concentrations uxccuding the proij:)osed soil clefinup levels. <br /> 4 <br /> 3.0 OFF-SITE DISPOSAL PLAN <br /> Off-site disposal of the petroleum-affected soil in to Class 11 landfill could be <br /> completed in approximately four to six weeks. The Forward Landfill in southern <br /> Stockton bas lower disposal costs than the next nearest disposal facility, the 131.1 landfill <br /> in Livermore. The forward disposal facility,- tieing closer to the site has the added <br /> 101820A-0102900-2 <br /> coilrcmZ p1n 2 <br /> i. <br /> 5 <br />