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.5a MR- <br /> P <br /> KLEINFELDER <br /> 3.5 MONITORING WELL ELEVATION SURVEY , <br /> On March 16, 1990, the three monitoring NYells were surveyed to establish a relative <br /> elevation of each well. No established benchmark was located near the site. To minimize <br /> costs a cement pad located northwest of the building (Plate 3) was usej as the local <br /> benchmark, and an arbitrary elevation of 100 feet was set for the pad. This arbitrary <br /> selection is not material to measuring the direction and gradient of ground water flow as <br /> the calculations are based on relative comparisons of each well elevation. The relative . <br /> elevations of the top of casings(TOCs)are presented in Table 1. <br /> NIS <br /> i <br /> 1. <br /> F15-90-101 5 <br /> Copyright 1990 KLein#etder, Inc. <br /> 3 <br />