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Site Background Information: Chapin Brothers Investments, Inc. <br /> Page 10 of 19 <br /> • TPH-g not detected below was detected below 20 feet bsg overall, except in the area of <br /> boring CBS. <br /> • Benzene was not detected in any of the soil samples analyzed. <br /> • Various other BTEX compounds were detected in six of the seventeen soil samples analyzed. <br /> The greatest concentrations of BTEX compounds detected were generally in soil samples <br /> collected at a depth of 20 feet bsg offsite and at a depth of 15 feet bsg in the area of soil <br /> boring CB5. <br /> • MTBE was detected in one of the seventeen soil samples analyzed. MTBE was detected at <br /> a concentration of 0.007 mg/kg(CB 1-25').The other fuel additives were not detected in the <br /> soil samples analyzed. <br /> A total of nine grab water samples collected at the site. Six grab water samples were analyzed by <br /> OnSite and three additional grab water sample were analyzed by MAI. <br /> • TPH-g was detected in four of the grab ground water samples collected from the site at <br /> concentrations up to 22,000 microgram per liter (µg/1). The greatest concentration of <br /> hydrocarbons as gasoline were detected at the location of CHP5 and toward the west to the <br /> location of CB3. <br /> • Benzene was detected in four of the water samples analyzed at concentrations ranging from <br /> 1.2 pg/1 in boring CHP6 to 150 µg/1 in boring CHP5. The most significant concentrations <br /> of toluene, ethylbenzene and xylene were also detected in the water sample collected from <br /> CHP5. <br /> • MTBE was detected in three of the grab water samples analyzed at concentrations ranging <br /> from 2.3 µg/1 in boring CHP7 to 11 µg/1 in boring CHP5. TBA was detected in the grab <br /> water sample from boring CHP5 at a concentration of 67 pg/l. While DIPE was detected in <br /> six of the grab water samples analyzed at concentrations ranging from 1.3 µg/1 in boring <br /> CHP7 to 150 µg/1 in boring CHP 1. <br /> • TPH-g was detected in samples from monitoring well samples MW-1,MW-3,MW-5,M W-4 <br /> and vapor well VE-1 at concentrations of 410 µg/l, 4,600 pg/l, 800 µg/l, 4,000 µg/1 and <br /> 1,100 pg/l,respectively. <br /> • Benzene was detected in ground water samples collected from wells MW-1,MW-3,MW-4 <br /> MW-5 and vapor well VE-1 at concentrations of 5.9 pg/l,76µg/1,740µg/l, 1.9µg/1 and 9.2 <br /> µg/1, respectively. Other BTEX compounds were detected in the well samples at <br /> concentrations up to 480 pg/l. <br /> • MTBE was detected in the samples collected from wells MW-1, MW-3 and MW-4 at <br /> concentrations of4.4 pg/l, 1.7 pg/1 and 3.7µg/1;DIPE was detected in samples collected from <br /> wells MW-3, MW-4 and MW-5 at concentrations of 20 pg/l, 1.2 µg/1 and 9.2 µg/l, <br /> Advanced Geo Environmental,Inc. <br />