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I <br /> A S S O C I A T E S I N C <br /> ANALYTICAL RESULTS <br /> The groundwater samples collected from wells MW1, MW2, MW4, MW5, MW6, and MW9 and <br /> contained detectable concentrations of TPHg and BTEX constituents The groundwater samples <br /> collected from wells MW3 and MW8 and the on-site domestic well contained no detectable <br /> concentrations of TPHg, BTEX, MTBE, TBA, DIPS, ETBE, MME, 1,2-DCA, or EDB <br /> The groundwater sample collected from well MW6 contained the highest concentration of <br /> MTBE The groundwater samples collected from wells MW2, MW3, MW4, MW8, MW9, and <br /> the on-site domestic well contained no detectable concentrations of MTBE, TBA, DIPE, ETBE, <br /> MME, or EDB although the reporting limit for MW2 was elevated due to dilution <br /> The groundwater samples from wells MW1, MW5, MW6, and MW9 also contained detectable <br /> concentrations of 1,2-DCA Analytical results of groundwater samples are summarized in Table <br /> 2 and laboratory data sheets are contained in Attachment 2 <br /> RECOMMENDATIONS <br /> Based on the results of the first quarter 2004 monitoring event, we recommend the following <br /> • • Continue quarterly monitoring and analyze samples from the monitoring wells for TPHg, <br /> BTEX, MTBE, ETBE, DIPE, TBA, TAME, 1,2-DCA, and EDB <br /> • A subsurface investigation to evaluate the vertical extent of petroleum impacted groundwater <br /> is ongoing <br /> • <br /> S 1Enviromenta11252911reports\IQR-2004 doe 3 <br />