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DISCUSSION <br /> . At the time of the fourth quarter 2003 monitoring event, groundwater was encountered In the monitoring <br /> wells at depths ranging from 52 60 to 52 79 feet below ground surface (bgs) Groundwater elevations <br /> decreased between 0 08 and 0 16 feet in wells MW-13, MW-14, and increased 0 15 feet in well AS-1 <br /> since the September 10, 2003 monitoring event Wells MW-1 and VW were dry Groundwater elevations <br /> measured in the wells this quarter are the lowest since the fourth quarter 2001, when monitoring and <br /> sampling was re-instituted <br /> TPHG was reported in wells MW-13, MW-14, and AS-1 The highest concentration of TPHG (5,200 pg/L) <br /> was reported in well MW-13 Benzene (34 µg/L) was reported in well MW-13 MTBE was not reported In <br /> any wells during this sampling event 1,2-DCA was reported in wells MW-14 (23 µg/L) and AS-1 <br /> (7 4 µg/L) TBA was reported in well AS-1 (5 2 pg/L) The reporting limits in samples MW-13 and MW-14 <br /> were raised due to sample foaming Concentrations of hydrocarbons reported in wells are generally <br /> consistent with historical data <br /> ATTACHMENTS <br /> • Table 1 Groundwater Elevation and Analytical Summary <br /> • Figure 1 Site Location Map <br /> • Figure 2 Site Map <br /> • Appendix A Field Data Sheets <br /> o Appendix B Sampling and Analysis Procedures <br /> • Appendix C Certified Analytical Reports and Chain-of-Custody Documentation <br /> i <br /> P WeichertlStockton-i 031Quarterly120031Teichert_4Q03 DOC 5TRATV5 <br />