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ATTACHMENT 2 <br /> Process Flow Description <br /> Present System <br /> 1 . "White pipe" which conveys flow from underground workings to <br /> the surface through the rock tunnel. <br /> 2 . Flocculant tank for the 016 pond(s) . <br /> 3 . The 016 sediment ponds. <br /> Underground Sizing Screen <br /> 4 . Underground screen for removal of coarse solids. <br /> Water Treatment Plant <br /> 5. Pipeline conveys flow from tunnel to plant and recycle <br /> sump/hydrocyclone. <br /> 6 . Underflow from hydroclone, containing middling solids, goes <br /> into the wash plant cycle. Overflow re-circulates to re-cycle <br /> sump. <br /> 7 . Overflow from the recycle sump, containing very fine (-200 <br /> mesh) solids proceeds to flocculation. <br /> 8. Flocculant tank. <br /> 9. Mine water is flocculated. <br /> 10. Recycle sump maintains continuous rate of flow to hydroclone <br /> separator. <br /> Alternatives <br /> As indicated, the primary treatment for mine drainage will be the <br /> 016 ponds and the water treatment plant, with the 020 pond for <br /> "finishing. " <br /> However, Mid-CQntinent wishes to utilize the eight ponds of 016 , <br /> 001 and 020, as well as the water treatment plant and the coal <br /> preparation plant to allow maximum flexibility in management of <br /> mine water treatment, so that the approved system has back-up <br /> capabilities and alternatives. <br />