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i - <br /> *Well head elevations were d6termined ,with respect to an <br /> arbitrary datum- established at the edge of a _concrete l <br /> footing for a light standard located at the southeast <br /> corner of the site that was designated as having an <br /> elevation. of 60 . 00 feet . ' <br /> By employing the° well head_ elevations and depths to water, <br /> in monitoring wel.1s .MW-1 , ,MW-2 , and MW-3 , groundwater. <br /> elevations were calculated . Groundwater contours were <br /> drawn by interpolation of, the groundwater elevations . As <br /> shown on Figure - 3 of this 'repor;t ,, groundwater was .flowing <br /> N-30° -E, (at 0 . 0025 1t/,f t.) - on -September 30 , 1994 . <br /> The hydraulic gradient was 'xcal"cul ated`. by "drawi'ng a perpen- <br /> dicular nine to contours established as - described .and then <br /> determining the distance (L):.. and" elevation differences (h) <br /> between extreme contours . Distance (L) was measured at 65 . <br /> feet . The elevation difference .(h) was `52 : 28-•' - 52 . 12 or <br /> 0 . 16 feet . The hydraulic gradient (h/L) •was .then <br /> calculated : '- 0 . 16 ft/ 65 It 0 . 0025 ft/ft . <br /> E <br /> M <br />