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1 <br /> 16 3.D Summary of Findings <br /> 3.1 Site H dro eolo <br /> Y 9 9Y <br /> The well casing elevations were surveyed relative to an arbitrary bench mark at the site that <br /> was set to 100 00 feet The water table elevation measured on February 28, 1996 vaned <br /> between 42 03 feet and 43 52 feet (corresponding to depths between 55 67 feet and 56 45 <br /> feet) This was the first monitoring event during which water levels could be measured in all <br /> the site monitoring wells (Table 1) Monitoring wells MW-1, MW-2 and MW-3 (termed <br /> shallow wells) are screened within the upper portion of the unconfined aquifer, and have <br /> screen bottom depths of 63 feet, 64 5 feet and 65 5 feet, respectively Each screen length is <br /> 20 feet The average groundwater elevation measured in these wells in February 1996 was <br /> 43 48 feet (55 66 feet depth) The average February 1996 elevation is 7 65 feet above the <br /> average November 1995 water level The groundwater flow direction in these wells was <br /> estimated to be south-westerly, at a gradient of 0 001 ft/ft <br /> IMonitoring wells MW-4, MW-5 and MW-6 (termed deep wells) are screened within the lower <br /> portion of the unconfined aquifer and have screen bottom depths of 95 feet, 89 feet and 88 <br /> feet respectively Each screen length is 20 feet The average groundwater elevation in these <br /> wells is 42 09 feet (56 13 feet depth) The average February 1996 elevation was 7 59 feet <br /> above the average November 1995 water level This groundwater flow direction in these <br /> wells was estimated to be south-westerly, at a gradient of 0 002 ft/ft <br /> The water level data for the two sets of wells indicates distinct potentiometne surfaces within <br /> the unconfined aquifer, depending on the depth of the screened interval In February 1996, <br /> average water elevation (43 48 feet) measured in the three shallow wells was 1 39 feet higher <br /> than the average water elevation (42 09 feet) measured in the three deeper wells, indicating a <br /> vertically downward flow direction <br /> A summary of groundwater elevation data is provided in Table 1. A potentiometric surface <br /> map for both shallow and deep monitoring wells is presented in Figure 2 Figure 3 provides <br /> an illustration of the shallow and deep wells and their screened intervals <br /> MZ/05-07-96/VDBF/96-0007 IF 3-1 <br />