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and former product lines Analytical results are presented in Table 4 and Tables 6 <br /> through 9 <br /> Vs=7,280 ft2 x 29 ft=211,120 ft3 from 0 to 29 feet <br /> Petroleum hydrocarbons remaining = 383 mg/kg x 1x10 kg/mg x 1221b/ft3 <br /> x 211,120 ft3 <br /> = 9,864 lbs of petroleum hydrocarbons as TPHG remaining between <br /> 0 to 29 feet bgs <br />' V2=7,322 ft2 x 31 ft=226,982 ft3 from 30 to 615 feet <br /> Petroleum hydrocarbons remaining = 16 mg/kg x 1x10 kg/mg x 145 lb/ft3 <br /> x 226,982 ft3 <br /> 526 lbs of petroleum hydrocarbons as TPHG remaining between <br />' 30 to 61.5 feet bgs <br /> From 0 to 29 feet bgs, TPHD was detected in soil samples collected near former waste-ori <br />' tanks T9 and T10 Concentrations within 0 to 29 feet bgs ranged from below laboratory <br /> detection limits to 4,300 ppm(beneath former waste-oil tank T10) The total pounds of TPHD <br /> that remain between 0 and 29 feet have been estimated using an average concentration of <br /> 600 ppm, and assuming a bulk density for soli of 122 lb/ft3 Figure 7 shows the location of the <br /> soil samples between 0 and 29 feet bgs From 30 to 615 feet bgs, TPHD was detected in soil <br /> samples collected near former waste-oil tank T9 The concentrations of TPHD from 30 to <br />' 615 feet bgs ranged from below laboratory detection limits to 29 ppm (near former waste-oil <br /> tank T 10) Figure 8 shows the location of the soil samples between 30 to 615 feet bgs The <br /> total pounds of TPHD that remain between 30 and 61 5 feet have been estimated using an <br />' average concentration of 16 ppm, and assuming a bulk density for soil of 145 lb/ft3 The <br /> average concentrations used were obtained from analytical results of soli samples collected <br /> from the soil borings and soil samples LoUmted beneath the former USTs Analytical results <br /> are presented in Table 4 and Tables 6 through 9 <br /> V3=3,800 ft` x 29 ft= 110,200 ft3 from 0 to 29 feet <br /> 1 � <br /> Petroleum hydrocarbons remaining = 600 mg/kg x 1x10 kg/mg x 1221b1ft3 <br /> x 110,200 ft3 <br /> 1 <br /> 8,066 lbs of petroleum hydrocarbons as TPHD remaining between <br />' 0 to 29 feet bgs <br /> V4=3,690 ft2 x 31 ft= 114,390 ft3 from 30 to 61 5 feet <br /> tiA[�IVTJ"805\080514204BS 97\prz 3 Rev 0 3/32/97 <br /> 20805 142 004 6-3 <br /> 1 <br />