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j 17 <br /> . DISCUSSION <br /> TPHG and BTEX were detected in the samples collected from monitoring wells MW-1 through MW-7, <br /> MW-1B, MW-1C, and MW-81B at concentrations generally consistent with previous quarters MTBE was <br /> detected in the samples collected from monitoring wells MW-1 and MW-4 1,2-DCA was detected in the <br /> samples collected from monitoring wells MW-1 C, MW-8, and MW-8B at concentrations dust above method <br /> detection limits <br /> The groundwater flow direction was calculated to be towards the east-southeast at an average <br /> groundwater gradient of 0 0020 ft/ft The groundwater flow direction and gradient are generally consistent <br /> with previous quarters The groundwater elevations increased less than 1 foot since the previous <br /> monitoring event <br /> ATTACHMENTS <br /> • Table 1 Groundwater Monitoring Data <br /> • Table 2 Groundwater Analytical Results for Oxygenates <br /> • Figure 1 Site Location Map <br /> • Figure 2 Groundwater Elevation Contours (Second Quarter 2001) <br /> • Figure 3 Groundwater Analytical Summary (SecondQuarter 2001) <br /> • Appendix A Field Data Sheets <br /> • Appendix B Sampling and Analysis Procedures <br /> • Appendix C Certified Analytical Reports and Chain-of-Custody Records <br /> • <br /> • <br /> C1ARC0121681QTRLY12001\2168-2QOIReport DOC Delta <br />