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leveled to accommodate the interim relocation of the solid materials (non-authorized waste rock <br /> and commingled bank run materials to be removed from atop the composite liner system). <br /> In a similar manner, a leveled area will be established in a to-be-determined area immediately <br /> downgradient of and proximal to the concrete barrier wall to accommodate interim storage of free <br /> liquids (i.e., meteoric precipitation accumulation)to be pumped from the EPF. <br /> The upgradient staging/stockpile area will be established within the same area from which the <br /> non-authorized waste rock and bank run materials were derived; an area that continues to be <br /> occupied by like materials. This proposed staging and stockpile area location is also within the <br /> defined environmental protection facility (EPF) footprint, and as such, any/all materials placed <br /> therein will be fully protected from run-on (and subject to run-off containment) by the existing <br /> perimeter stormwater diversion features and concrete barrier wall, respectively. <br /> In conjunction with preparing the staging/stockpile area, VRI will ensure that the "as approved" <br /> design criteria of the existing stormwater channel features are maintained, and that the carrying <br /> capacity is sufficient to preclude run-on from contacting and/or otherwise adversely affecting the <br /> staged and/or stockpiled materials. <br /> Surface preparation of the staging/stockpile area will include blading and leveling of an area <br /> sufficient to accommodate on an interim basis those materials subject to removal from the EPF. <br /> In addition, a nominal 2-ft. high perimeter berm (or equivalent)will be established around the limits <br /> of the staging/stockpile area, to include a ramped access road across the berm to facilitate entry <br /> to the area. The perimeter berm shall serve the dual purposes of(a)secondary run-on prevention; <br /> and, (b) stabilization/containment of both the subject material stockpile and any "footprint" <br /> precipitation thereon. <br /> 1.2 Interim Management of Residual Liquids <br /> At this juncture (early December 2016), VRI estimates that a pool of approximately 7,500 to <br /> 10,000 gallons of free liquid resides in the EPF, and it is anticipated that this volume will be further <br /> reduced through natural evaporative effects prior to the startup of the removal action. If the final <br /> volume is such that it can be practicably managed through interim storage, VRI will pump all <br /> residual water (which can be largely characterized as meteoric precipitation accumulation) to an <br /> interim portable storage tank or tanks to be situated at the leveled area proximal to the concrete <br /> barrierwall. The proposed interim storage tank(s), or other suitable volume containment vessel(s) <br /> will be of sufficient capacity to receive the estimated volume of water contained within the EPF. <br /> All pumping efforts will be carried out in a manner that maximizes water recovery but avoids <br /> recovery of sediments and/or sludge. Recovered water will be retained within the interim storage <br /> tank through conclusion of the removal effort. <br /> In the event the EPF contained water volume exceeds readily available storage capacity at the <br /> time removal action efforts are undertaken, other disposition options may be considered, to <br /> include: onsite evaporation (e.g., high-pressure atomization or via land application within the <br /> 3 <br />