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• 20 May 2004 <br /> AGE-NC Protect No 98-0521 <br /> Page 7 of 9 <br /> or that no recognizable pattern is evident <br /> • Various BTEX compounds were detected in samples collected from monitoring wells MW-4 <br /> and MW-5 at concentrations as high as 1,900 µg/1 benzene (MW-4), 55 µg/1 toluene <br /> (MW-4), 430 µg/1 ethylbenzene (MW-4) and 530 µg/1 total xylenes (MW-4) <br /> • MTBE was detected in wells MW-1 through MW-5 by EPA Method 8260B at concentrations <br /> ranging from 3 2 pg/l (MW-5) to 3,900 µg/l (MW-4) <br /> • TBA was detected in the sample collected from well MW-5 at a concentration of 8 0 pg/1 <br /> • No other fuel oxygenates were detected in the samples collected during the September 2003 <br /> monitoring event <br /> Analytical results from the monitoring well ground water samples are summanzed in Tables 4 and 5 <br /> The laboratory report(MAI Lab IDs 0307492-001 and 0309359-001 through 0309359-005),QA/QC <br /> and chain-of-custody are included in Appendix G The lateral extent of dissolved contaminants is <br /> depicted on Figure 6 <br /> • 4' Quarter 2003 <br /> The results of the December 2003 monitoring event are as follows <br /> • TPH-g was detected in samples collected from monitoring wells MW-2 and MW-4 at <br /> concentrations of 160µg/1 and 200µg/l,respectively,TPH-g was not detected in the samples <br /> collected from monitoring wells MW-1, MW-3 and MW-5 <br /> • Benzene, ethylbenzene and total xylenes were detected in the sample collected from <br /> monitoring well MW-4 at concentrations of 29 µg/1, 9 0 µg/1 and 8 8 µg/1 respectively <br /> • MTBE was detected in wells MW-2 and MW-4 by EPA Method 8260B at concentrations of <br /> 160 µg/1 and 120 µg/l, respectively <br /> • No other fuel oxygenates were detected in the samples collected during the December 2003 <br /> monitoring event <br /> Analytical results from the monitoring well ground water samples are summarized in Tables 4 and 5 <br /> The laboratory report(CTEL Laboratory IDs 0312-207-1 through 0312-207-5),QA/QC and chain-of- <br /> custody are included in Appendix H The lateral extent of dissolved contaminants is depicted on <br /> Figure 7 <br /> Advanced GeoEnviron mental,Inc <br />