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1 16 4. SUMMARY OF RESULTS 5 A summary of the e analytical results from current and past well samplings is presented in Table 1 Based on the water-level data for June 4, 1996 (Table 1 ), Smith Environmental has interpreted the groundwater gradient and flow directions for the upper and lower aquifers, as shown on Figures 3 and 4, respectively In the local upper aquifer (Monitoring Wells MW-5, MW-6 and MW-7), the groundwater level rose an average of 0 35 feet, ranging from 0 25 feet in Monitoring Well MW-7 to 0 42 fleet in Monitoring Well MW-5. In the local lower aquifer (Monitoring Wells MW-1 R, MW-2, MW-3, and MW-4), the groundwater level rose an average of 0 47 feet, ranging from 0 42 feet in Monitoring Well MW-1 R to 0 52 feet in Monitoring Well MW-3 The apparent groundwater flow direction in the local upper aquifer is to the east-southeast at a gradient of approximately 0 005 (Figure 3) The apparent groundwater flow direction in the local lower aquifer is to the east-southeast at a gradient of approximately 0 003 (Figure 4) Laboratory analyses of water samples collected on June 4, 1996 from Monitoring Wells MW-2, MW-3, MW-4, MW-6, and MW-7, indicated that TPH-G, BTEX and MTBE were not detected in any of these samples In the sample collected from ' Monitoring Well MW-1R, TPH-G, and BTEX were not detected, but MTBE was detected at a concentration of 19 parts per billion (ppb). In the sample collected from Monitoring Well MW-5, MTBE was detected at a concentration of 660 ppb Because of the concentration of MTBE present in the sample from Monitoring Well MW-5 it was necessary to rase the detection limits of TPH-G to 125 ppb and BTEX to 1 2 ppb At these increased detection limits, TPH-G and BTEX were not detected in the sample collected from Monitoring Well MW-5 The next quarterly groundwater +il sampling is scheduled for September 1996 i • MV%W X94 2735OUIK 132 RPT 123 Apr 061 8�H