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w <br /> Site Background Information: Chapin Brothers Investments,Inc. <br /> Page 20 of 19 <br /> The total volume of ground water treated as of April 2002 is approximately 3,701,758 gallons. <br /> Cumulative totals of 6.758 lbs of benzene and 193.4 lbs of TPH-g are estimated to have been <br /> extracted since ground water treatment began on 02 April 2002. <br /> Based on the limits of the known impacted ground water and current (02 April 2002) laboratory <br /> analytical results of ground water samples,approximately 0.778 kilograms(1.7 lbs)of benzene and <br /> 7.78 kg(17.15lbs)of TPH-g are estimated to be dissolved in ground water. <br /> GROUND WATER TREATMENT <br /> Between 31 December 2007 and December 2008,the pump-and-treat system extracted and treated <br /> approximately 1,448,070 gallons of impacted ground water;a total of 5,282,962 gallons of water has <br /> been treated since ground water extraction began in April 2002. During ground water remediation <br /> between April 2002 and May 2005 an estimated 193 lbs of TPH-g were extracted from ground water. <br /> During ground water remediation between December 2007 and December 2008,an estimated 763.6 <br /> lbs of TPH-g were extracted from ground water. The total weight of TPH-g extracted from the site <br /> with ground water extraction is 957 lbs. <br /> Idroaced GeoEncironmental.Inc. <br />