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I 09 January 2009 AGE-NC Project No. 08-1641 Page 2 of 3 I :I 0.26 feet (MW-3) above mean sea level (MSL) to 0.45 feet (MW-2) above MSL. Ground water at the site was inferred to be flowing generally northeast, under a hydraulic gradient E of approximately 0.002 feet/feet (ft/ft). Figure 3 illustrates contoured ground water elevations as measured on 10 October 2008. ! `i • Total petroleum hydrocarbons quantified as gasoline (TPH-g) were detected in the ground water sample collected from well MW-1 at a concentration'of 2,000 micrograms per liter (µg/1). No additional analytes were reported at or above laboratory detection limits in the ground water samples analyzed. f I� Analytical results of water samples collected in October 2008 are summarized in Table 2. The j laboratory report(CTEL Lab Project.No.CT214-0810088),quality assurance/quality control report, and chain-of-custody form are included in Appendix D. Electronic deliverable format(EDF) files and depth-to-water data were uploaded to the State GeoTracker database;confirmation numbers are 9502239406 and 5069855213. 4.0. CONCLUSIONS Based upon the results of the ground water monitoring, AGE presents the following conclusions: l ' i0 Concentrations of TPH-g reported in well MW-1 are generally declining overtime as shown in a graph depicting trends in TPH-g concentrations in the well MW-1 provided in Appendix E. .E 5.0. RECOMMENDATIONS Based on the conclusions presented in this report, AGE.recommends: • Continuation of minimal quarterly ground water ,monitoring. The first quarter 2009 { monitoring event is.scheduled for January 2009. • Reduced ground water sampling schedule to quarterly sampling of wells MW-1 and MW-3; with annual ground water sampling of all other monitoring wells. Continue ground water measurements of all monitoring wells each quarter. f I Advanced GeoEnvironmental,Inc.