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DISCUSSION <br />. TPHG was detected in samples collected from wells MW-1 (13,000 µg/L), MW-4 (84 pg/L), VW-1 B (200 <br /> pg/L). and VW-2B (73 pg/L) MTBE was detected in the samples collected from wells MW-1 (8,800 pg/L), <br /> MW-2 (2 2 gg/L), MW-4 (5,600 pg/L), VW-1B (1,700 pg/L), VW-213 (450 pg/L), and VW-313 (200 pg/L) <br /> Petroleum hydrocarbons or fuel oxygenates were not detected in samples collected from monitoring wells <br /> MW-3, and MW-5 through MW-7 <br /> Groundwater flow during the fourth quarter 2001 was calculated to be generally towards the northeast at a <br /> gradient of 0 0034 ft/fit East, northeast, and southeast groundwater flow directions have been reported <br /> since groundwater monitoring was initiated in 1995 At the time of the quarterly sampling event <br /> (December 11, 2001), groundwater elevations had decreased approximately between 2 59 feet to 3 33 <br /> feet in the monitoring wells since the previous sampling event (September 13, 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 2,3,4 Groundwater Elevation Contours (4th Quarter 2001) <br /> • Figure 5 Groundwater Analytical Summary(4`h 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 /> P IARCO12186IQTRLY120011Arco_2186_4Q01 doe Delta <br />