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� v <br /> a <br /> A S SO C I ATE S I N C <br /> respectively. The groundwater sample from well MM3 contained elevated concentrations of <br /> TPHg and TPHd, but the chromatogram_patterns did not match the patterns for gasoline or diesel. <br /> ' The groundwater sample from well also contained TPHss at a concentration of 5,500 micrograms <br /> per liter (ppb) and detectable concentrations of ethylbenzene and xylenes. Analytical results of <br /> groundwater samples are summarized in Table 3. Laboratory data sheets and chain-of-custody <br /> ' documentation are contained in Appendix F. <br /> 6.0 DISCUSSION <br /> Based on the analytical results and field observations, the soil and groundwater beneath the <br /> location of the former 1,000-gallon UST are impacted by TPHss.' Groundwater and soil samples collected from wells MWl and MW2 indicate that impacted soil and groundwater have been <br /> defined to the north and east of the former UST. The soil samples from boring SB2 indicate the <br /> vertical extent of impacted soil is limited to less than 65 feet bgs. The extent of impacted <br /> ' groundwater and soil to the south and west is unknown. <br /> 1� <br /> 1 <br /> k <br /> W:\17295VeporWsumii.doc 6 <br />