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i <br /> Case Closure Summary <br /> Former Shell Service Station <br /> Page 3 of 3 ' <br /> 3 <br /> 12/7/04 Two 15,000-gallon fiberglass gasoline USTs, four fuel dispensers, one <br /> 550-gallon waste oil tank, and associated piping were removed from this <br /> N site. Four soil samples were collected beneath the four dispensers at 3 feet <br /> d bgs; six soil samples were collected beneath the piping at 3 feet bgs; six <br /> soil samples were collected beneath the two USTs at 3 to 12 feet bgs; one <br /> J soil sample was collected beneath the waste oil tank at 8 feet bgs; and four <br /> soil samples were collected beneath the four hoists at 4.5 to 6.5 feet bgs. <br /> The only chemicals of concern detected were xylene at 0.012 mg/kg and <br /> 0.0059 mg/kg in soil samples D-4 and P-5, respectively; TPH-diesel <br /> ranging from 2.7 to 22 mg/kg in the one waste oil soil sample and four <br /> hoist soil samples; and total recoverable petroleum hydrocarbons ranging <br /> from 13 to 86 mg/kg in the four hoist soil samples. <br /> 01/20/04 to a <br /> 07/08/05 Quarterly groundwater monitoring has taken place with non-detect results <br /> reported for chemicals of concern except for MTBE concentrations found <br /> 3 in MW-1 ranging from 4.0 µg/l,(January 2004),to 1.2 µg/L(July 2005). <br /> a <br /> n <br /> k <br /> 3 <br /> I <br /> •i <br /> rn ] <br /> i !qqI <br /> 3 <br /> 'i <br />