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5 <br /> 4.0 SUMMARY OF RESULTS <br /> A summary of the analytical results from current and past well sampling is presented in Table <br /> 1. Based on the water-level data for November 30, 2001, ATC has interpreted the groundwater <br /> gradient and flow direction for the upper aquifer as shown on Figure 3. In the upper aquifer <br /> monitoring wells MW-5, MW-6, MW-7 and MW-10, the groundwater elevation decreased <br /> from the previous quarter an average of 0.61 feet, ranging from 0.53 feet in monitoring well <br /> MW-10 to 0.74 feet in monitoring well MW-6. The apparent groundwater flow direction in the <br /> upper aquifer was generally southeasterly at a gradient of approximately 0.001 (Figure 3). <br /> Based on the water-level data for November 30, 2001 (Table 1), ATC has interpreted the <br /> groundwater gradient and flow direction for the lower aquifer as shown on Figure 4. In the lower <br /> aquifer monitoring wells MW-1R, MW-2, MW-3, MW-4, MW-8, and MW-9, the groundwater <br /> level decreased from the previous quarter an average of 0.82 feet, ranging from 0.76 feet in <br /> monitoring wells MW-9 to 0.95 in MW-1R. The apparent groundwater flow direction in the <br /> lower aquifer was generally southwesterly at a gradient of approximately 0.003 (Figure 4). <br /> Laboratory analysis of the water samples collected on November 30, 2001 indicate that TPH-G, <br /> BTEX, and MTBE were not detected in groundwater samples collected from MW-3, MW-4 and <br /> MW-9, in the local Iower aquifer, and MW-10, in the local upper aquifer. TPH-G and MTBE <br /> were detected in groundwater samples collected from MW-1 R in the lower aquifer. TPH-G was <br /> detected in groundwater samples collected from MW-5 in the upper aquifer. MTBE was <br /> detected in groundwater samples collected from wells MW-2 and MW-8 in the lower aquifer and <br /> MW-5, MW-6 and MW-7 in the upper aquifer. BTEX was not detected in the groundwater <br /> samples during this sampling event. <br /> Analytical results of fuel oxygenate compounds by USEPA Method 8260 indicate that MTBE <br /> was detected in the groundwater samples obtained from monitoring wells MW-1R at a <br /> concentration of 53 micrograms per liter (µg/1), MW-2 (1,500 µg/1), and MW-5 (2,800 µg/1), <br /> MW-6 (0.93 pg/1), MW-7 (3.7 µg/I) and MW-8 (8.5 pg/1). Fuel oxygenates other than MTBE <br /> (TBA, DIPE, ETBE, TAME and 1,2-DCA) were not detected in the groundwater samples <br /> collected from the ten wells sampled this quarter. The next quarterly groundwater sampling is <br /> scheduled for the first quarter of 2002. <br /> ):51nProgrc kOWKSTOPIQS 132aEPORTSQ00I\44thQtr2001rpt_do <br />