Laserfiche WebLink
f <br /> • DISCUSSION <br /> Results of the fourth quarter 2000 groundwater monitoring event indicate that the concentrations of <br /> dissolved hydrocarbons are generally consistent with previous sampling events MTBE was detected in <br /> the samples collected from monitoring wells MW-1, MW-4, and vapor extraction well VW-3A at <br /> concentrations of 1,870 µg/L, 1,150 µ1L, and 59 2 4g/L, respectively The shallow vapor extraction wells, <br /> VW-1A through VW-2B and VW-3B were scheduled to be sampled, however groundwater was not <br /> present in the wells at the time of sampling <br /> Based on the groundwater elevation collected monthly, the direction of groundwater flow was generally <br /> toward the east-northeast which is consistent with the previous sampling events The groundwater <br /> gradient throughout the quarter was approximately 0 003 ft/ft Groundwater elevations increased <br /> approximately two feet in monitoring wells MW-1, MW-2, MW-3, MW-4, and vapor extraction well VW-3A <br /> since the previous sampling event (September 2000) <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 Elevation Contours (10119100) <br /> • Figure 3 Groundwater Elevation Contours (11122100) <br /> C Figure 4 Groundwater Elevation Contours (12120100) <br /> • Figure 5 Groundwater Analytical Summary(Fourth Quarter 2000) <br /> • • Appendix A Field Data Sheets <br /> a Appendix B Sampling and Analysis Procedures <br /> e Appendix C Certified Analytical Reports and Chain-of-Custody Records <br /> • <br /> C\ARC0\21861QTRLY1200012186Q400 Delta <br /> 311101 <br />