ARCHIVED REPORTS XR0001365 - Laserfiche WebLink

Home Browse Search

" - _ y i13 July 2004 s AGE-NC Project No 00-0769 Page 3 of 7 - 3 1 ' GROZJND WATER ELEVATION AND GRADIENT Depth to ground water was between 25 92 feet (MW-4D) and 30 12 feet (MW-5E) below the tops ' r ' of the well casings (BTOC)on 24 February 2004 Ground water elevations ranged from 15,34 feet ' (MW-4D)to 19 11 feet(MW--7D)below mean sea level(MSL) However,well casing elevation data for well MW-4D recorded during the February 2004 site survey appears to be erroneous' The well ' casing elevation data for well MW-4D was not utilized in plotting ground water elevation data Ground water elevation data collected from the site and wells off-site were plotted for the informal ' HU-1 through HU-4 hydrogeologic flow,units Ground water elevation data is presented in Table 1 and contoured ground water elevation data is presented in Figures 3 through 6 The elevation and gradient for each"unit is described below HU-1 Based on ground water elevation data collected in HU-1 Upper Zane(25 to 51 feet bsg),the ground water flow is generally toward the east and east--southeast with an average gradient of approximately • 0 003 ft/ft (Figure 3) HU-2 _ ' Based on ground water elevation data collected in HU-1(112 to 125 feet bsg),the ground water flow resembled an easterly trending ridge with the southern limb flowing toward the southeast at a gradient of approximately 0 002 ft/ft The northwest limb was inferred to be flowing north-northeast ' (Figure 4) r HU-3 Based on ground water elevation data collected in HU-3(140 to 160 feet bsg),the ground water flow Idirection is generally toward the east with an average gradient of approximately 0 001 ft/ft r (Figure 5) N HU-4 I the ground water Based on ground water elevation data collected in HU-4 (160 to 175 feet bsg}, • flow direction was generally toward the north at an approximate gradient of 0 007 ft/ft (Figure 6) rAdvanced GeoEnv ronmental,Inc rr ' r n s