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' No volatile, semivolatile, or organochlorine pesticide/PCB compounds <br /> were detected in the deep upgradient or deep downgradient wells with the <br /> exception of bis (2-ethylhexyl) phthalate (19 parts per billion (ppb)). <br /> ' The results of the laboratory blank sample analyzed with this sample <br /> indicated the same compound at 77 ppb. Thus, this compound may be a <br /> laboratory contaminant introduced during the analytical process (3). <br /> ' Concentrations of metals in shallow downgradient wells (MW-4 and MW-5) <br /> were similar to those detected in the shallow upgradient well (SB-1). <br /> For metals information, see Appendix C. <br /> No volatile, semivolatile, or organochlorine pesticide/PCB compounds <br /> were found above detection limits in the shallow upgradient well or the <br /> shallow downgradient wells (3). <br /> ' Trichloroethane (TCA) was detected in the shallow (61 feet below ground <br /> surface (bgs)) and deep (281 feet bgs) soil samples from boring MW-2 at <br /> concentrations of 25 and 40 parts per billion, respectively. The <br /> results of the laboratory blank sample analyzed with this sample <br /> ' indicated the presence of TCA at 10 parts per billion, suggesting that <br /> this compound could be a laboratory contaminant. No semivolatile or <br /> ' organochlorine pesticide/PCB compounds were detected in the soil samples <br /> from MW-2 or in other shallow or deep soil samples collected during the <br /> SWAT program (3). <br /> Toluene was detected in the deep soil sample taken at 201 feet bgs from <br /> MW-1 at a concentration of 12 parts per billion. This compound was not <br /> detected in shallow soil or in the groundwater sample from MW-1. <br /> ' Toluene was also not detected in any other deep or shallow soil sample. <br /> Results of shallow and deep soil sampling and groundwater sampling <br /> efforts are listed in Appendix C. <br /> Analysis of the samples collected during the SWAT Program indicates that <br /> no chemical compounds are present in the shallow perched and deep <br /> regional aquifers, or in vadose soils. According to Emcon Associates, <br /> ' organic chemicals in soil or water samples can be accounted for through <br /> 3-2 <br /> ' sa/tm/chl/si <br />