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� v <br /> o <br /> ASS OCIATIES INC <br /> concentration in one sample from boring MW 1 Detectable concentrations of TPHg and TPHd <br /> were recorded in the samples collected from boring MW3 Soil samples collected from boring <br /> MW2 contained no detectable concentrations of oxygenate fuel additives, EDB, or DCA The <br /> soil samples collected from boring MW2 at depths of 20 5 feet and 28 5 feet bgs contained low <br /> concentrations of BTEX constituents Elevated concentrations of TPHg and TPHd were detected <br /> ' in the samples collected from boring MW2 Analytical results of soil samples are summarized in <br /> Table 1 Laboratory data sheets and chain-of-custody documentation Is presented in Appendix B <br /> ' 44^2 Groundwater Analytical Results <br /> Groundwater samples collected from wells MW 1, MW2, and MW3 contained no detectable <br /> concentrations of BTEX, oxygenate fuel additives, EDB, DCA, or total lead Groundwater <br /> samples from wells MW2 and MW3 contained TPHg at concentrations of 4,900 micrograms per <br /> ' liter (ppb) and 200 ppb, respectively Groundwater samples from wells MW1, MW2, and MW3 <br /> contained TPHd at concentrations of 66 ppb, 57,000 ppb, and 4,200 ppb, respectively Analytical <br /> results of groundwater samples are summarized in Table 3 Laboratory data sheets and chain-of- <br /> custody documentation are contained in Appendix D <br /> 5,0 DISCUSSION <br /> Based on the analytical results and field observations, the soil and groundwater beneath the <br /> location of the former 10,000-gallon UST are impacted by TPHg and TPHd Groundwater <br /> samples collected from wells MW 1, MW2, and MW3 and soil borings SB5 and SB6 indicate that <br /> ' the extent of the TPHd and TPHg plumes appear to be less than 80 feet from the former UST in <br /> the northwest, northeast, and southeast directions The extent of impacted groundwater to the <br /> southwest is unknown None of-the or groundwater samples collected from the beneath the <br /> location of the former 10,000-gallon UST contained oxygenate fuel additives, EDB, or DCA <br /> 1 A) <br /> b <br /> Vv- <br /> U <br /> � � l <br /> w 162500\reporls\sumn doo 4 <br />