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18 June 2001 AGE-NC Project No 99-0559 Page 4 of 5 I3 3 FREE PRODUCT MEASUREMENTS/REMOVAL/DISPOSAL During the quarter free-product thickness measurements and free-product removal were performed in well MW-2 The amount of free-product recovered was not quantified prior to disposal of 100 gallons of waste water The current free product thickness, during the April sampling event, was approximately 5 feet I4.0. SUMMARY AND CONCLUSIONS Based on data collected during the monitoring event, AGE concludes • The current ground water flow direction was determined to be to the west Ia Free floating gasoline continues to be present in well MW-2, located in the area of the USTs High concentrations ofTPH-g,BTEX and MTBE are present in the three surrounding ground water monitoring wells In general, the dissolved hydrocarbon concentrations have increased • in wells MW--2, MW-3 and MW-4 A slight decrease in hydrocarbon concentrations has occurred in MW-1 • The lateral and vertical extent of Impacted ground water has not been defined 5.0. RECOMMENDATIONS Based on the findings and conclusions in this report, AGE recommends the following • Additional assessment of the hydrocarbon and MTBE-Impacted soil should be conducted directly north, west and east of the UST area to determine the lateral extent of the plumes The vertical extent of impacted soil and ground water should be assessed, with the installation of additional ground water monitoring wells • Additional assessment of the ground water is necessary to the west of well MW-4,southwest of well MW-3 and north of well MW-1 • The ground water monitoring wells should be monitored on a quarterly basis • Interim ground water remediation should proceed immediately to miu maze the migration of the free-product and high concentrations of MTBE i Advanced GcoEnvironmental,Inc