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DISCUSSION <br /> TPHG and BTEX were detected in the sample collected from monitoring well MW-1 BTEX were detected <br /> in the sample collected from well VW-3B Benzene and ethylbenzene were detected in the sample <br /> collected from well VW-2B at concentrations fust above laboratory method detection limits These results <br /> are relatively consistent with previous quarters MTBE was detected in the samples collected from wells <br /> MW-1, MW-4, VW-1B, VW-2B, and VW-36 at concentrations ranging from 94 µg/L (VW-1B) to 28,000 <br /> fig/L (MW-1) <br /> The groundwater flow direction was calculated for each month of the second quarter 2001 (Figures 3, 4, <br /> and 5) The flow directions were generally towards the northeast at a gradient ranging from 0 0020 to <br /> 0 0039 ft/ft Groundwater elevations decreased approximately 2 5 to 3 feet since the previous monitoring <br /> event (March 16, 2001) <br /> ATTACHMENTS <br /> • Table 1 Groundwater Monitoring Data <br /> • Table 2 Groundwater Analytical Results for Oxygenates <br /> • Table 3 Groundwater Elevation Data <br /> • Figure 1 Site Location Map <br /> • Figure 2 Groundwater Analytical Summary(2nd Quarter 2001) <br /> • Figure 3,4,5 Groundwater Elevation Contours (2nd 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 />• <br /> C 1PARCO\21861QTRLY120011Arco 2186 2Q01 Report doc Delta <br /> 8/27/01 <br />