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• Gradient and Direction of Ground-Water Flow <br /> A licensed land surveyor produced a site map showing the location of the monitoring wells <br /> and other site features with listing of the horizontal and vertical references of the <br /> monitoring wells The elevation of the monitoring wells were referenced to within 0 01-foot <br /> of a nearby United States Geodetic Survey, County, or City bench mark The horizontal <br /> distances were measured to the nearest 01-foot. The ground-water elevation in each <br /> monitoring well was calculated by subtracting the depth to water from the wellhead <br /> elevation The ground-water elevation information was used to evaluate the direction of <br /> groundwater flow, evaluate the ground-water gradient, and construct a ground-water <br /> gradient or potentiometric map <br />• <br />• 3M55-5 <br />