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4 29 December 2000 • AGE-NC Pro ect No 96-0235 Page 7 of 8 4 0. SUMMARY AND CONCLUSIONS Based on the data collected from the former UST No 3 area, AGE finds Deeper ground water in the MW-1, MW-2, MW-6B and MW-8B does not appear to be In , direct hydraulic communication with the shallower ground water in MW-4, MW-5, MW-6A, IMW-7 and MW-8A Monitoring well MW-3, screened from 30 to 55 feet bsg and EW-2, screened from 30 to 50 feet bsg, may be in hydraulic communication with all wells at the site (Figures 5 and 6) • Ground water flow within the lower monitored Interval appears to have been toward the ' southwest, ground water flow in the upper Interval appears to have been flowing radially from the northwest to north to northeast • The greatest concentrations of hydrocarbons in ground water were detected in wells EW-2, MW-2 and MW-1 Impacted deeper ground water appears to be centered In the area near EW-2, MW--2 and MW-1 Shallow well MW-7, located just south of MW-2, contained only low concentrations of BTEX Based on the data collected from the former UST cluster area, AGE finds I • Significant concentrations of TPH,-g,TPH-d and BTEX were detected in shallow well EW-1 TPH-g and TPH-d were were not detected in the shallow well samples MW-11A, MW-12A and MW-13A Low concentrations of TPH-g or TPH-d were detected in the deeper well I ~ samples MW-11 B and MW-12B I " • MTBE was detected in the lower screened wells MW-9, MW-11B and MW-13B,and in ' shallow wells MW-10 and MW-13A • The most impacted ground water appears to be centered around EW-'1 and,MW-10, deeper ground water is less intensely impacted • Ground water flow in the area of the former UST cluster was generally toward the west and southwest Ground water flow calculations do not Include data from the, wellspurged and sampled during the August monitoring event Concentrations of TPH-g and TPH-d in shallow and deep groundwater are illustrated on Figures 6 and 7 Advanced Geol+nvironmental,Inc