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12 2 UST System Removal <br /> On August 13, 1996, Fisch Environmental removed the two USTs The USTs included an 8,000- <br /> gallon tank(Tank 1) and a 1,000-gallon tank(Tank 2) According to the EHD inspection notes, <br /> both tanks appeared corroded, and holes were observed in the 1,000-gallon UST EHD also <br /> noted gasoline odor in both UST excavations <br /> Two soil samples were collected from beneath each former UST, and a single soil sample was <br /> collected from beneath the former dispenser The soil sample locations are shown on Figure 2, <br /> and the sod sample analytical results are summanzed in Table 1 <br /> 1 The soil sample collected from beneath the former dispenser island contained the highest <br /> concentrations of gasoline hydrocarbons This sample contained 12,000 mg/kg of TPH-as- <br /> gasoline, 67 mg/kg of benzene, 710 mg/kg of toluene, 220 mg/kg of ethylbenzene, 1,200 mg/kg of <br /> ixylenes, 215 mg/kg of total lead, and 2,100 mg/kg of TPH-as-kerosene All four of the soil <br /> samples collected from beneath the former USTs contained detectable concentrations of TPH-as- <br /> gasoline (up to 2,000 mg/kg), toluene (up to 26 mg/kg), ethylbenzene (up to 7 1 mglkg), and <br /> xylenes (up to 16 mg/kg) Methyl tertiary butyl ether (MTBE) was not detected to any of the <br /> samples analyzed <br /> 12 3 Preliminary Investigation and Evaluation <br /> On April 16, 2001, Ramage Environmental published Preliminary Investigation and Evaluation <br /> Report, which documented the results of sod and groundwater-grab sampling from three on-site <br /> Geoprobe®sod borings (G-1, G-2, and G-3) The boring locations are shown on Figure 2 <br /> Results of the investigation indicated that soil and groundwater beneath the site had been <br /> impacted by petroleum hydrocarbons The sod sample analytical results are summarized in Table <br /> 1, and the groundwater analytical results are included in Table 2 <br /> 12 4 Monitoring Well Installations and Sensitive Receptor Survey <br /> 2002 Ramage Environmental published Monitonn Well Installation Report, <br /> On September 27, g p 9 <br /> which documented the installation of four on-site groundwater monitoring wells and a survey of <br /> potential sensitive receptors within 2,000 feet of the site <br /> 4 <br /> s <br />