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I <br /> 4-1 <br /> 1 , <br /> 4. SUMMARY OF RESULTS <br /> A summary of the analytical results from current and past well samplings is presented in Table 1 Based <br /> on the «ater-level data for December 4, 1997 (Table 1), ATC Associates Inc has interpreted the <br /> groundwater gradient and flow directions for the upper aquifer, as shown on Figure 3 In the local upper <br /> aquifer (Monitoring Wells MW-5, MW-6 and MW-7), the groundwater level dropped an average of 0 36 <br /> feet, ranging from 0 28 feet in Momtonng Well MW-7 to 0 41 feet in Momtonng Well MW-5 The <br /> apparent groundwater flow direction in the local upper aquifer is southeasterly at a gradient of <br /> approximately 0 0035 (Figure 3) <br /> Laboratory analysis of the water sample collected on December 4 1997 from Monitoring Well MW-5 <br /> ' indicates that TPH-G and BTEX were not detected in this sample MTBE was detected in the sample <br /> collected from Monitoring Well MW-5 at a concentration of 880 parts per billion (ppb) The next <br /> quarterly groundwater sampling is scheduled for the first quarter of 1998 <br /> i <br /> 1 - - <br /> l� <br /> 1997 4th Quarter Groundwater Momlonng Report <br /> ATC PLSMPLCASANT01MAdmin Tyk1LE}iRMAN1QLgASTOP5132597RPT4TF1 AOC[March 3 17481 <br />