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i <br /> I <br /> 4+ <br /> DISCUSSION: <br /> TPHG (91.6 µg/L), toluene (6.71 gg/L), MTBE (89.2 (µg/Q, and TAME (2.45 pg/L) were detected in the <br /> sample collected from monitoring well MW-5. Petroleum hydrocarbons and fuel oxygenates were not <br /> detected in the samples collected from the other monitoring wells. <br /> The groundwater flow direction (east-southeast) and gradient (0.0017) are generally consistent with <br /> previous quarters. Groundwater elevation increased approximately 2 feet since the previous sampling <br /> event(December 2000). <br /> Delta procured and installed a GastTM oil-free compressor and re-initiated air bubbling on March 5, 2001. <br /> Dissolved oxygen data was collected on March 11, 2001. Delta will collect dissolved oxygen data on a <br /> monthly basis to evaluate oxygen consumption and performance of the air bubbling system. <br /> ATTACHMENTS: <br /> E • 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 (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 /> CAARC0121301QTRLY1200112130 Q101.doc Delta <br /> 5110101 <br /> t <br />