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DISCUSSION r TPHG was detected in samples collected from wells MW-1 (6,800 µg/L) and MW-4 (88 µg/L) BTEX compounds were also detected in the sample collected from well MW-1 MTBE was detected in the samples collected from wells MW-1 (4,700 pg/L), MW-2 (1 9 µg/L), MW-4 (4,900 pg/L), VW-1B (63 pg/L), VW-213 (320 fig&), and VW-31B (26 µg/L) TAME (33 4g/L)was also detected in the sample collected from well MW-4 Petroleum hydrocarbons or fuel oxygenates were not detected in samples collected from monitoring wells MW-3, MW-5, MW-6, or MW-7 These analytical results are consistent with previous sampling events Groundwater flow directions during the first quarter 2002 were calculated to be towards the east-northeast at gradients ranging from 0 0019 to 0 0021 ft/ft East, northeast, and southeast groundwater flow directions have been reported since groundwater monitoring was initiated in 1995 At the time of the quarterly sampling event (March 14, 2002), groundwater elevations had increased approximately 3 feet in the monitoring wells since the previous sampling event (December 11, 2001) ATTACHMENTS • Table 1 Groundwater Monitoring Data • Table 2 Groundwater Analytical Results for Oxygenates • Table 3 Groundwater Elevation Data • Figure 1 Site location Map • Figure 2,3,4 Groundwater Elevation Contours (First Quarter 2002) • Figure 5 Groundwater Analytical Summary(First Quarter 2002) Appendix A Field Data Sheets • Appendix B Sampling and Analysis Procedures • Appendix C Certified Analytical Reports and Chain-of-Custody Records Y 1ARCO\21861QTRLY12002\Arco_2186_1 Q02 doe Delta.