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TABLE 1: RANGE OF ON-SITE CONTAMINANTS OF CONCERN <br /> CONTAMINANT PRODUCTION AND MONITORING WELLSa,b SOILSc,d,e <br /> SHALLOW DEEP <br /> A AQUIFER A AQUIFER <br /> (Ng/L) (µg/L) (mg/kg) <br /> Trichloroethane ND-380 60-94 ND-0.71 <br /> (ND-0.001) <br /> 1,1-Dichlorethylene - ND-220 24-45 ND (ND-0.003) <br /> Tetrachloroethylene ND-51 13-18 ND-0.001 (ND) <br /> Trichlorethylene ND-7 3-9 ND (ND-0.002) <br /> Copper ND-110 (ND) NA ND-7,8009 <br /> (10-86) <br /> Lead 150-230 (ND) ND ND-51,000 (4-150) <br /> Silver ND (ND) NA 0.1-700h <br /> (ND-0.8) <br /> Mercury 290f (ND) NA ND-4 (ND-1) <br /> Notes: <br /> a Summary of results from 1986 sampling of on-site groundwater. <br /> b Parentheses indicate filtered sample analytical results. <br /> c Summary of results obtained from 1986 and 1987 sampling of on-site surface and <br /> subsurface soils. <br /> d Surface soil analytical results represent soils and sludge. <br /> e Parentheses indicate analytical results for subsurface soil samples. <br /> f Contaminant detected in only one sample. <br /> g Maximum value detected in sample obtained from northern section of <br /> Pond 2. <br /> h Except for the maximum value detected, the remaining samples were less than 5 <br /> mg/kg. <br /> ug/L Micrograms per liter or parts per billion (ppb) . <br /> mg/kg Milligrams per kilogram or parts per million (ppm) . <br /> ND Not detected. <br /> NA Not analyzed for. <br /> 5 <br />