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I <br /> Chevron U.S.A. - Page 11 <br /> 8.0 RESULTS OF SURVEY <br /> A survey of each well was conducted by a licensed surveyor in order to <br /> establish relatively accurate surface elevations. The surface elevation were <br /> utilized in conjunction with ground water depth measurements to help evaluate <br /> round water <br /> g gradient and direction of flow. The results of the survey have been . <br /> f summarized on Table I as follows: <br /> t TABLE I <br /> Results of Survey <br /> (Elevation expressed in feet above mean sea-level <br /> Surface Depth to Ground water <br /> Well I.D. Elevation Ground Mater Elevation <br /> MW-1 35.45 70.88 -35.43 <br /> MW--2 36.67 72.14 -35.47 <br /> MW--3 35.71 71.18 -35.47 <br /> Groundwater monitoring well locations are shown on Plat0.ncluded at the <br /> end of the text. v <br /> 9.0 GROUND WATER GRADIENT ASSESSMENT <br /> i <br /> The elevations obtained from the survey of the well heads was compared to <br /> depth to ground water measurements made at each well location in order to <br /> determine ground water elevations. The ground water elevation calculated from <br /> measurements made at the time of our field study were utilized in assessing <br /> Lground water gradient and direction of ground water flow at the subject property. <br /> I <br /> Based upon review of the ground water elevation data and locations of the ground <br /> water monitoring wells, an interpreted ground water gradient was mechanically <br /> plotted, and is illustrated on Plate 3 of this report. The ground water is j <br /> i <br /> interpreted as being near flat, with the gradient in August of 1989 calculated at <br /> approximately 8.3x10-4 (0.00083 ft./ft.) flowing in a east-northeasterly <br /> direction. <br /> DAMES & MOORE <br />