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corner of the sit-e that was de signated .as,. having an <br /> elevation of 60 . 00 feet . z <br /> By 'employing' the well head elevations and depths .to water <br /> in monitoring wells 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 report , ,groundwatet flow is <br /> towards the northeast at N762a -E. <br /> Hydraulic gradient w.as cal.culatedby drawing a� perpen- <br /> + dicular line to contours established as described and then' determining the distance on- this.' line between extreme <br /> contours- a. distance of 5.2 feet . 'Hydraulic head (h) <br /> between extreme contours was 52 . 39 ft less 52 . 30 ft or' 0 . 09 <br /> feet . Hydraulic gradient is equal- to h/L or 0 . 09/52 = <br /> 0 . 00173 ft/ft . <br /> While actual measurements- of hydraulic conductivity have <br /> not yet been made at -the site, hydraulic conductivity for <br /> sand, - silt , and clay soils are in the range' of 100 , 1 , and <br /> r. 0 . 001 ft'/day , . respecti.vel`y . <br /> The soil texture at the..depths occupied by groundwater at. <br /> the .site is silty clay.,. If one assumes a hydraulic .. <br /> conductivity (K) value of 0 . 05 ft/.day, groundwater will , <br />` travel 0 . 03 feet per year.,- If a- hydraulic conductivity ' of <br /> f 0 . 5 ft'/day is assumed, groundwater -will travel 0 . 3 ft/year ., <br />,IE , <br />