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' 20 June 2001 AGE-NC Project No 98-0426 ' Page 3 of 4 No fuel oxygenates were detected above laboratory reporting limits in any of the ground water samples collected The current and historical ground water analytical results are summarized on Table 2 The laboratory - report(MAI Lab I D No 67488 through 67490), chain-of-custody form and the laboratory QA/QC report are included in Appendix B 4.0. SUMMARY AND CONCLUSIONS Based on the data collected during this monitoring period, AGE concludes ' Groundwater flow at the site was toward the northeast which is consistent with the February 2001 monitoring event and regional trends The ground water elevation has increased approximately 0 5 feet since the February 2001 sampling event • In general, TPH-g concentrations decreased in the ground water sample from MW2 and increased in the sample from MW3 this quarter as compared to the February 2001 sampling event, TPH-g was not detected in the sample from MW-1 BTEX compounds were not detected in the sample from MW-1, but various BTEX compounds were detected in the samples from MW-2 and MW-3 0 MTBE concentrations remained at non-detectable levels for the fourth consecutive quarter 5.0. RECOMMENDATIONS ' AGE recommends the following ' • Continued quarterly monitoring of the ground water monitoring wells The next monitoring event will be performed in August 2001 • Discontinue analyses fort'fuel oxygenates AGE recently submitted two work plans to 1)install two additional groundwater wells in the down- gradient and eastern cross-gradient directions from monitoring well MW3(Figure 2),and 2)advance ' three soil borings to help define vertical and lateral extent of contamination The work plans have been approved by the PHS-EHD and the projects are anticipated to occur between the second and third quarters of 2001 I ' Advanced GeoEnvironmental,Inc