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• 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 /> with the following exceptions Toluene was below the method reporting Omit (MRL) in well MW-1 MTBE <br /> was below MRLs in wells MW- 2 and MW-3 TPHG was below the MRL in wells MW-4 and VW-3 The <br /> groundwater gradient and direction of groundwater flow (northeast) were generally consistent with the <br /> previous sampling events Groundwater elevation increased 3 34 feet in wells from the previous sampling <br /> event (December 1999) <br /> Groundwater samples were analyzed for oxygenates tertiary butanol, MTBE, di-isopropyl ether, ethyl tertiary <br /> butyl ether, and tertiary amyl methyl ether (TAME) using USEPA Method 8260 MTBE was detected in <br /> wells MW-1, MW-4, and VW-3 at concentrations of 281 µg/L, 106 pg/L, and 25 2 µg/L, respectively TAME <br /> was detected in well MW-1 at a concentration of 2 46 �Lg/L All other oxygenates were below laboratory <br /> detection limits for all wells <br /> ARCO will transfer this project to another consultant The new consultant will begin providing services <br /> during the second quarter 2000 <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 (First Quarter 2000) <br /> • Figure 3 Groundwater Elevation Contours (First Quarter 2000) <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 /> • <br /> CP W NCamPk\DatalArchive\ArcoN21861Qu1y12186Q100 DOC-98ut 1 IT Corporation <br /> 06/06/00 <br />