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constant,this will be easy to accomplish. A fixed mixer will accomplish the thorough mixing. A <br /> valve and pipe will allow the mixed solution to flow to the recirculation pond where the mixture <br /> will be allowed to enter the water output from the plant, at which point the flocculation of the <br /> sediment will take place. The chemical is used in very small quantities and the solids should settle <br /> very rapidly,based on experience at other sites. <br /> Several 55 gallon drums of the Hyperfloc may be stored on site at any one time. The Hyperfloc will <br /> be stored close to the recirculation pond so that it can be mixed and applied to the pond water <br /> within a short distance. <br /> The flocculant drums,mixing drums, and all pumping systems,will be contained within a <br /> secondary containment structure that will be able to contain 110%of the volume of the largest <br /> container. An example location of the flocculant storage can be seen on Map C-2. A standard spill <br /> kit will be placed on site to be rapidly employed in case a spill of the flocculant were to occur. All <br /> employees will be trained to check for spills of the flocculant and trained in the use of the spill kit. <br /> In addition, DBMS, CDPHE and Park County Department of Health will be immediately notified if <br /> a reportable flocculant spill occurs. Flocculant usage rate will be determined in concert with the <br /> flocculant supplier once operations begin, through sampling and testing. <br /> The flocculant will allow all solids to settle out in the initial area of the recirculation pond. This <br /> pond will be excavated in native material,which is alluvium. It is not anticipated that the initial <br /> settling area of the pond will rapidly drain to groundwater,but if that is the case, a layer of fine silt <br /> (-6"thick)will be laid in the pond. Sediment build up from the usage of the pond will further <br /> reduce permeability over time. <br /> Material safety data sheets for the Hyperfloc chemical can be found in Appendix 2. <br /> 5_2 Pond Cleanout <br /> The recirculation pond is shown on Maps C-2 and C-3. These are typical locations within the <br /> mining area. The pond will periodically be relocated, following design criteria, throughout the <br /> mine's life to accommodate mining under the processing area, concurrent reclamation, and <br /> economics of material dredge piles to the processing area. <br /> Trout Valley Ranch November 2016 D-4 c«x lxwitki and Amcia(m FLIA <br />