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i <br /> DISCUSSION <br /> • TPHG and BTEX were detected in the samples collected from monitoring wells MW-1 through MW-7, <br /> MW-1 B, MW-1 C, and MW-813, consistent with the previous quarter Benzene, toluene, and xylenes were <br /> detected in the sample collected from monitoring well MW-8C at concentrations lust above method <br /> detection limits MTBE was detected in the samples collected from monitoring wells MW-1, MW-3, and <br /> MW-4, consistent with the previous sampling event 1,2-DCA was detected in the samples collected from <br /> monitoring wells MW-1 C, MW-6, MW-8, and MW-86 at concentrations dust above method detection limits <br /> Methanol was detected in the samples collected from monitoring wells MW-2 (1 61 mg/1) and MW-8B <br /> (1 17 mg/1) <br /> The groundwater flow direction was calculated to be towards the east-northeast at an average <br /> groundwater gradient of 0 0026 ft/ft The groundwater flow direction and gradient are consistent with <br /> previous quarters The groundwater elevations are relatively unchanged since the previous monitoring <br /> event <br /> ATTACHMENTS <br /> • Table 1 Groundwater Monitoring Data <br /> • Table 2 Groundwater Analytical Results for Oxygenates <br /> • Table 3 Groundwater Flow Direction and Gradient <br /> • Figure 1 Site Location Map <br /> • Figure 2 Groundwater Elevation Contours (First Quarter 2001) <br /> • Figure 3 Groundwater Analytical Summary(First Quarter 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 /> C 1ARC0121681QTRLY1200112168Q101 DOC Delta <br /> 4/25/01 <br />