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Nj y, <br /> DISCUSSION: <br /> Groundwater samples were analyzed for TPHG, BTEX, and.oxygenates. Results of this monitoring event <br /> indicated that dissolved gasoline hydrocarbons were generally consistent with previous monitoring events. <br /> The groundwater gradient and direction of groundwater flow (east-northeast) were generally consistent with <br /> the previous sampling events, Groundwater elevation decreased 4.19 feet from the previous sampling event <br /> (June 1999). <br /> Groundwater samples were analyzed for the oxygenates tertiary butanol, MTBE, di-isopropyl ether, ethyl <br /> tertiary butyl ether, and tertiary amyl methyl ether (TAME) using USEPA Method 8260. MTBE was detected <br /> in wells MW-1, MW-2, MW-4, and VW-3 at concentrations of 800 Ftg/L, 3.64 µg/L, 1,060 ELg/L, and 1,500 <br /> [tg/L, respectively. MTBE by USEPA Method 8260 was below laboratory detection limits for well MW-3. <br /> TAME was detected in wells MW-1 and VW-3 at concentrations of 8.12 [tg/L and 12.3 pg/L. All other <br /> oxygenates were below laboratory detection limits for all wells. <br /> Assembly Bill 681 Notification (AS 681) <br /> This property is owned by Catherine Bevanola, P.O. Box 901297, Palmdale, CA 93590-1297. The property <br /> owner receives copies of reports for this site. <br /> ATTACHMENTS: <br /> • Table 1 Groundwater Monitoring Data <br /> • Table 2 Groundwater Analytical Results for Oxygenates <br /> • Figure 1 Site Location Map <br /> • Figure 2 Groundwater Analytical Summary (Third Quarter 1999) <br /> • Figure 3 Groundwater Elevation Contours (Third Quarter 1999) <br /> • Appendix A Sampling and Analysis Procedures <br /> • Appendix B Laboratory Analysis Reports and Chain-of-Custody Records <br /> • Appendix C Field Data Sheets <br /> CP1C:1Archive\Arco121861Qtrly121860399.DOC-95Usg:1 j��tctRC�C <br />