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Evaluating the Groundwater Flow Direction and Gradient <br /> The elevations and positions ("x" and "y" lateral coordinates) of the monitoring well were surveyed <br />' by a licensed land surveyor The elevations of the monitoring wells were referenced to within <br /> 0 01 foot of the bench mark The horizontal distances were measured to the nearest 0 1 foot The <br /> elevations were taken to either the notch or the arrow on the well casing <br /> The groundwater elevations for each monitoring well were calculated by subtracting the depth to <br />' water from the wellhead elevation The groundwater elevation information was to construct a <br /> potentiometric surface map, which was used to evaluate the direction of groundwater flow and the <br /> magnitude of the groundwater gradient <br /> N 1sacDP120041Prj18801880039IA 4aa doe Shaw Environmental,Inc <br /> (01050000) <br /> ' B2 <br />