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3.0 Summary of Findings <br /> ' 3.1 Sitedr Bolo <br /> ►'�Y o9 gY <br /> ' The well casing elevations were previously surveyed relative to an arbitrary bench mark at the <br /> site that was set to 100 00 feet. The water table elevation measured on May 22, 1996 vaned <br /> between 45.86 feet and 47.47 feet. Water table depths were measured from both shallow and <br /> ' deep wells. A summary of groundwater elevation data is provided in Table 1 <br /> Monitoring wells MW-1, MW-2 and MW-3 (termed shallow wells) are screened within the <br /> upper portion of the unconfined aquifer, and have screen bottom depths of 63 feet, 64.5 feet <br />' and 65.5 feet bgs, respectively. Each screen length is 20 feet. The average groundwater <br /> elevation measured in these wells on May 22, 1996 was 47.21 feet. The average May 1996 <br /> groundwater elevation was 3.73 feet above average February 1996 water level for these wells <br /> The groundwater in the upper portion of the unconfined aquifer flows to the south-southwest <br />' at an approximate gradient of 0.006 ft/ft. <br /> Monitoring 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 bgs, respectively Each screen length is 20 feet. The average groundwater elevation in <br /> these wells is 45.90 feet. The average May 1996 groundwater elevation was 5.21 feet above <br /> the average February 1996 water level for these wells. The groundwater in the lower portion <br /> of the unconfined aquifer flows to the south-southwest at an approximate gradient of 0 002 <br /> ft/ft. <br /> The water level data for the two sets of wells indicate distinct potentiometnc surfaces within <br /> the unconfined aquifer, depending on the depth of the screened interval. In May 1996, the <br />' average water level elevation measured in the three shallow wells was 1.31 feet higher than <br /> the average water elevation measured in the three deeper wells, indicating a downward <br /> component of flow, which supports previous results Potentiometnc surface maps for both <br /> shallow and deep monitoring wells are presented in Figure 2. <br /> 1 3.2 Groundwater Quaffty Data <br /> TPH as diesel was not detected in any of the six monitoring wells at the site during the <br /> second quarter 1996. This is the first sampling event since January 1995 during which no <br /> detectable concentrations of TPH as diesel were measured from groundwater in any of the <br /> II <br />' M7/07-22-96/VDBF196-0016 db 3-1 <br />