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contain 110% of the full tank, if a rupture occurs. Also, the SPCC Plan has strict procedures for <br />spill containment measures, tank filling controls, and use of spill kits and spill reporting <br />procedures. Tanks are to be inspected at regular intervals and written reports aze kept on site <br />demonstrating compliance. <br />The controls to ensure that the pumped water from the pit is clean before entering the River are <br />as follows: 1) The pump will always be at least 2 feet below the active level within the pit area, <br />therefore, the water entering the pump will be filtered groundwater only. 2) A sediment sump as <br />shown on Map C-2 is located adjacent to the pump, which is located at the northeast corner of <br />the disturbed area. <br />According to searches on the Division of Water Resources database, there are no wells which aze <br />within 600 feet of White River City Pit. There are no stockponds within a reasonable distance; <br />however there is one spring which will not be disturbed through the mining of the pit. <br />Details of the pit pumping operation such as flow rates, discharge points, etc. aze given in the <br />Mine Plan section. <br />2. Groundwater <br />Alluvial groundwater levels are approximately 4-6 feet from the surface in the permit area, <br />depending upon the time of year, and more importantly, depending upon the river level. Almost <br />all of this water is from the River itself since the hills immediately south of the site are in <br />relatively impermeable layers of the Green River Shale which cannot provide much water. The <br />gravel is approximately 15-25 feet thick below a relatively thick topsoil zone of 2-3 feet <br />thickness and overburden of approximately 4 feet. The shales immediately below the gravel <br />deposit prevent any rechazge from the gravel into deep aquifers that might be located below the <br />shales. <br />White River City Pit December 06 H-3 <br />