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4 <br /> each boring were collected from a depth of 5.5 feet and composited into three soil samples <br /> for analysis by area (ship-building yard, welding and fitting shops, and the open west portion <br /> of the parcel, Figure 3). Additionally, soil samples from the water-table interface and water <br /> samples were collected from the two monitoring wells. The soil and water samples were <br /> analyzed for priority pollutant metals and volatile organics (EPA Method 8240). <br /> The results of that initial investigation (WaterWork, January 1990) indicated slightly <br /> elevated concentrations of total lead and mercury, neither of which exceeded their <br /> respective TTLCs, in the composite soil sample from the former ship-building yard area <br /> (Figure 3). Concentrations just above detection limits of toluene and total xylenes were also <br /> present in this soil sample. Concentrations of the remaining priority pollutant metals in the <br /> soil samples were generally within the average range of metal concentrations in soil, and no <br /> volatile organics were detected in any of the other soil samples. In the water samples, <br /> concentrations of cadmium, chromium (II1), lead, and selenium exceeded or equaled their <br /> respective MCLS, and a small amount of acetone in well MW-1 (suspected laboratory <br /> contaminant) was the only volatile organic detected in either well. <br /> A second phase of investigation was conducted in March 1992 to verify and assess the extent <br /> and source of impacts on the soil and ground water and determine site-specific hydrologic <br /> conditions. Seven additional soil borings were drilled and subsequently completed as <br /> shallow monitoring wells (MW-3 through MW-9), which were located in the northern <br /> portion of the property (Figure 2). Discrete soil samples were collected at the 5.5-foot <br /> depth during drilling, water samples were collected from each monitoring well, and all soil <br /> and water samples were again analyzed for priority pollutant metals and volatile organics <br /> (EPA Method 8240). <br /> The results of the second phase of investigation (RESNA, May 1992) indicated elevated <br /> levels of total lead (still below the TTLC) in several soil samples from the former ship- <br /> building yard and the welding and fitting shop area (Figure 2). However, the soluble lead <br /> concentrations from these samples were well below the STLC for lead. The concentrations <br /> [aU <br /> LHDORFF & SCALMANINI <br /> CONSO I. ! ING ENU IN F f f1 5 <br />