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Working To Restore Nature <br /> Madison St site. These tanks were reportedly installed concurrent with building construction <br /> in 1956 Soil samples from beneath the tanks were variously analyzed for TPHg, total <br /> tpetroleum hydrocarbons as diesel(TPHd), BTEX, volatile and semi-volatile organics and metals <br /> Petroleum hydrocarbon constituents (BTEX) and TPHg, TPHd, metals (total lead, cadmium, <br /> chromium, nickel and zinc), semi-volatile and halogenated volatile organics were present in the <br /> soil samples collected beneath the tanks (Table 1B) <br /> Representative soil samples were also collected and analyzed from the tank pit soil piles prior <br /> to placement of the soils back in the excavations The tank pits were lined with plastic sheeting <br /> prior to placing the soils back in the excavations <br /> Because no further site investigation has been conducted in the vicinity of the waste oil and <br /> ' solvent tanks removed in November 1992, the limits of soil impact resulting from the waste oil <br /> and solvent tanks removed in 1992 remain undefined The impact to groundwater from these <br /> tanks is also unknown <br /> I <br /> ' Groundwater Monitoring and Sampling Program <br /> A groundwater monitoring and sampling program was initiated in September of 1990 Ten <br /> ' rounds of groundwater monitoring have been conducted since the program was initiated, the <br /> ' most recent was conducted in June 1994 Depth to water measurements have ranged from <br /> approximately 25 to 30 feet below the tops of the well casings Free product has been present <br /> ' in well MW3 since the groundwater investigation was initiated <br /> ' Groundwater analytical data are summarized in Table 2 Water level measurements appear in <br /> Table 3 <br /> 1 <br /> 1 <br /> 1500701REPORTSISR-06%FNL 5 <br /> 1 <br />