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DISCUSSION <br /> See attached tables for historical data This quarter, per the requirements of the California Regional Water Quality Control <br /> Board, Central Valley Region, two wells (ATR-2 and SMW-1) were analyzed for oxygenates using EPA Method 8260 <br /> Methyl tertiary butyl ether was detected in both wells No other oxygenates were detected in either well Tertiary butyl <br /> alcohol (350 micrograms per liter) was detected in well ATR-2 (see Table 2) Operation and maintenance data for the <br /> remediation system at this site is presented in Appendix A <br /> ATTACHMENTS <br /> Figure I Groundwater Elevation Map <br /> Figure 2 Constituent Concentration Map <br /> Table L Summary of Groundwater Monitoring Data Water Elevations and Analyses <br /> Table 2 Summary of Additional Analytical Data-Oxygenates by EPA Method 8260 <br /> Table 3 Groundwater Flow Direction and Gradient <br /> Appendix A O&M Report <br /> Appendix B Field Data Sheets, Laboratory Reports, and Chain-of-Custody Documentation <br /> Use or disclosure o data continued on this s sheet is subject to the restriction specified a1 the beginning of this document <br /> 331 51REP0RTS14TH96QTR DOC <br />