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DISCUSSION <br /> Dissolved petroleum hydrocarbon and fuel oxygenate concentrations in the samples were generally <br /> consistent with the results of previous sampling events Benzene was detected for the first time in well <br /> MW-2 (1 9 pg/I) MTBE was detected in the samples collected from monitoring wells MW-1 (18 µg/L), <br /> MW-2 (56 µg/L), and MW-3 (0 56 pg/L) 1,2-DCA was detected in the samples collected from wells MW-2 <br /> (1 2 pg/L) and MW-3 (0 54 pg/L) TPHG, toluene, ethylbenzene, ETBE, DIPS, TAME, and TSA were <br /> reported below laboratory detection limits for all of the samples, consistent with the previous sampling <br /> event <br /> The groundwater flow direction was calculated to be towards the east at an average gradient of <br /> 0 0011 ft/ft Groundwater elevations decreased 0 85 to 0 86 feet in the monitoring wells since the <br /> previous sampling event (March 2002) <br /> ATTACHMENTS <br /> • Table 1 Groundwater Monitoring Data <br /> • Table 2 Groundwater Analytical Results for Oxygenates and Additional Compounds <br /> • Figure 1 Site Location Map <br /> • Figure 2 Groundwater Elevation Contour Map (Second Quarter 2002) <br /> • Figure 3 Groundwater AnaEytical Summary(Second Quarter 2002) <br /> • Appendix A Feld Data Sheets <br /> • Appendix B Sampling and Analysis Procedures <br /> • Appendix C Certified Analytical Reports and Chain-of-Custody Records <br /> P\13p-Arco for URS160801Quarterly\Arco_6080_2Q02 doc <br />