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PjffWAWAkffMAm_� <br /> Working to Restore Nature <br /> 1) Soil containing°benzene remains in place between 10 to 22 feet bsg (boring BH-1). <br /> Total pounds of benzene (B1) were calculated as follows: <br /> B1 = 0.025 mg/kg X 1x10 kg/mg X 2,200 ft3,X 123 1b/ft3 <br /> _ . 0.006 lb of benzene <br /> where: mg -.milligram, kg = kilogram, lb = pounds, ft - feet <br /> assuming'the bulk density of soil = 123.4bs/ft3 <br /> (2)- Soil containing benzene remains in place between 30 to.40 feet bsg (boring BH-1). <br /> Total pounds of benzene (B2) were.calculated as follows: <br /> B2 `0.035 mg/kg X 1x10-6 kg/mg X 1,800 ft' X 123 1b/ft3 <br /> = 0.008 lb of benzene <br /> (3) Soil containing toluene remains in place between,15 to 40 feet bsg (boring BH-1 and <br /> southeast corner of the tank cavity). Total pourids.of toluene(T) were calculated as follows: <br /> T = 0.06 mg/kg X:1x10-6'kg/rng.X 6,25.0 ft3 X.123 lb/ft3 <br /> = 0.05 lb-of toluene' <br /> (4) Soil-containing ethylbenzene remains in place between 15 to-40 feet bsg(boring BH-1 <br /> and southeast corner of the tank cavity). Total pounds of ethylbenzene.(E) were calculated <br /> as follows:. <br /> E = 0.2 mg/kg X 1x100 kg/mg X 6,250 ft' X 123 lb/ft3 <br /> 1.53 lb of ethylbenzene <br /> (5) Soil containing xylenes remains in place-between 15 to 40 feet bsg (boring BH-1 and <br /> southeast corner of the tank.cavity). Total pounds of xylenes (X)were calculated as follows: <br /> X = 3.25 mg/kg X 1xi0-6 kg/mg X 6,250 ft3�X 123 lb/ft3 <br /> = 2.49 lb of total xylenes <br /> - <br /> Dissolved_Hydrocarbons,in Groundwater <br /> Results .of:groundwater monitoring show that concentrations of TPHg and BTEX were <br /> below detection limits in wells MW-1 through MW-4 during the-last four quarters; however, F <br /> 0504gtew123W9.01 4 I;I <br /> l <br /> i <br />