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DISCUSSION <br /> . At the time of the second quarter 2004 monitoring event, groundwater elevations had decreased between <br /> 1 28 and 1 33 feet since the previous monitoring event (February 9, 2004) Groundwater elevations <br /> measured during the second quarter 2004, are generally consistent with historical data <br /> During the second quarter 2004, MTBE was reported in wells MW-1 (0 73 pg/L) and MW-2 (0 72 pgl) <br /> TBA (10 gg/L) was reported in well MW-1, and 1,2-DCA was reported in wells MW-1 (24 pg/L) and MW-2 <br /> (23 pg/L) TPHG, BTEX compounds, DIPS, ETBE, or TAME were not reported in either monitoring well <br /> Chemical analytical data for the second quarter 2004 monitoring event are similar to historical monitoring <br /> well data <br /> ATTACHMENTS <br /> • Table 1 Groundwater Elevation and Analytical Data <br /> • Table 2 Groundwater Analytical Results for Oxygenates <br /> • Figure 1 Site Location Map <br /> • Figure 2 Site Map <br /> • Appendix A Field Data Sheets <br /> • Appendix B Sampling and Analysis Procedures <br /> • Appendix C Certified Analytical Reports and Chain-of-Custody Documentation <br /> • <br /> • <br /> P U B C\Stockton\Qrt1y120041IBC Stockton-2Q04 DOC 5-rKAW5 <br />