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t:4 <br /> j <br /> Blockbuster Video/Yellow Submarine <br /> 1.A Site Assessment/Remedial Recomarendations <br /> Page 4 <br /> During the exploration trenching activities at this site, "erosene contaminated <br /> soils were detected in the northwest corner of the property. T e partial limits of <br /> the contaminated soils were determined by trenching (Plate 1, 2, 3 8:4). <br /> k-& <br /> ThiKerosene contaminated soils occupied a volume that could best be dt:scribcd <br /> <<, as a "squashed pipe shape". The long axis of the conln;mnatiun day-;ightca at <br /> surface near the location of sample 13B (Plate 1). The contamination descended <br /> at about a 45 degree angle towards the north (Plate 2). 1'hc contamination <br /> a plume was about four feet thick, 15 feet wide and 30 feet in length. <br /> The dimensions of this unusual plume indicate that the contamination followed <br /> some sort of preferred permeability zone in the soil. The exact geologic nature <br /> of this anisotropy could not be determined (possibly a subsidence crack). The <br /> 1:jrne was follwed "down the dip" for 30 feet, to a vertic,-1 depth of 22 feet <br /> below ground surface. Undoubtedly, the plurne continu:;s "down the dip", <br /> F exactly how much further is unknown. <br /> 3.5 Contamination Characteristics <br /> Northvrest Corn(U: Samples of the contamination plume were taken at varying <br /> intervals along the dip, daring exploration trenching. These samples show that <br /> ' there is no Benzene present and that contamination concentrations generally <br /> decrease with depth. <br /> Samples from this contaminate plume analyzed as follows: <br /> 1�7 <br /> s � SAMPLE DEPTH KEkOSF,NE TCLEP1Z <br /> 13B ' 1390 ND 1359 11,400 4,700 <br /> 08B <br /> 4, 66.9 ND ND 27 ND <br /> 08B 8.0 125 ND ND ND 1'dD <br /> 1 a RE#1 22.0 343 ND ND 370 220 <br /> it is evident from the above, that contaminate concentrations markedly decrease <br /> with depth. Remaining volume of the plume is approximately J cubic Dards. <br /> WasteOil Tante: Samples of this contamination plurne were taken at a depth cf <br /> a <br /> 12 fee:tbottom of tank) and at 15 feet(bottom of excavation). These analyse <br /> d. <br /> as follavl.=: <br /> Oil MOTOR <br /> SAMPLE VPPT H OIL PPS BENZ !-QL— XYZ, B-BENZ <br /> 1/39 3.n 12 <br /> RE,Txn1. 10,000 ND ND I'M ND <br /> 0 i 1 5 -- j ate- ND--ND----ND:- Ni} .-...- -- --- --- - - ---- -- <br /> �.-• -2514-.�. <br />