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October 2000 -33- 003-2191 <br />• V, = Ki / ~ <br />Where: <br />V, = groundwater seepage velocity (fflday) <br />K = hydraulic conductivity(ft/day) <br />i = hydraulic gradient (dimensionless) <br />4 = effective porosity (dunensionless) <br />The estimates of hydraulic conductivity (0.1 fl/day), gradient (0.03), and an effective <br />porosity (0.18) discussed above, yield a seepage velocity of 0.02 ft/day (6 feet per <br />yeaz) in the B Sand beneath the site. <br />3.2.2(E) Site Location in Relation to the Base Floodplain of Nearby Drainages <br />The neazest floodplain is in the Plum Creek drainage some one-half mile to the west. <br />The site is topographically situated more than 100 feet above the creek level and is more <br />• than 85 feet above the floodplain. There is no floodplain associated with any of the <br />drainages on site. The topography is rolling hill and valley arrangements that rise in <br />elevation to the east. See Drawings 1 and 2. Based upon the above, there can be no <br />impact from the site to the floodplain. <br />3.2.2(F) An Evaluation of the Poteutial for Impacts to Existing Surface Water and <br />GroundwaterQuality from the Proposed Facility for Solid Waste Disposal <br />The potential for impacts to the surface water in the azea is negligible. All of the run-off <br />from the depository will be contained in retention basins during the different phases of <br />operation and they will be designed to contain a 100-yeaz flood event. No water will <br />leave the site from surface drainage from disturbed lands. Undisturbed runoff from <br />lands not disturbed will be routed away from the drainage from the disturbed azeas. The <br />adjacent drainages aze all ephemeral. Based on the geology and the topography, there is <br />no potential to create a negative impact to the existing surface water or the surface water <br />system. No ponds, springs, wells, or impoundments aze fed by the ephemeral drainage <br />from the site. There will be no off site impacts from the flow of water from the lands. <br />WO'1191R1915ed~iWmnitl D00 doc Sedalia Recycling Center and Depository <br />