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<br />Gold Hill Mill 3 Mav 19. 1995 <br />7. It is stated in the application that if any additional structures or <br />buildings are found to be necessary, they will be built in the area <br />encompassed by the boundaries of this permit application. Please <br />acknowledge your understanding that a technical revision would have to be <br />filed and approved before any additional structures could be erected, and <br />that additional bond may be required for demolition and disposal if the <br />proposed structures do not fit in with the approved post mining land-use. <br />8. The quantities of mill chemicals proposed to be stored at the site <br />are quite large given the capacity of the Gold Hill Mill, however, since <br />the chemicals in question are relatively non-hazardous, the Division will <br />not object to the quantities proposed. However, the Division will require <br />that these mill chemicals be stored within the mill building so that any <br />spills can be contained, and will further require that no more than 12 <br />empty chemical drums be stored at the site at any given time. Disposal <br />of empty drums can be costly, and could deplete the Division's bond in a <br />forfeiture situation. <br />9. Please provide a schematic of the mill building showing all possible <br />exit points for fluid or slurry spills. Include locations where the <br />proposed concrete spill containment structures will be located. Also <br />provide a volumetric analysis that will demonstrate that the proposed <br />height of the containment structures will be sufficient to prevent <br />reasonably foreseeable spills from escaping the building. <br />10. The Division will require that all diversion ditch reaches, culvert <br />locations, etc. be accurately located on a map, and that the size and <br />configuration of ditch reaches and culverts be provided. <br />11. Although we have referred to the rock cover required for the tailing <br />surface as a "capillary barrier", there are other benefits to the rock <br />layer than preventing capillary rise. For example, the rock layer will <br />facilitate drainage and provide a superior plant rooting zone. It is the <br />Division's understanding, based on discussions at our May 16, 1995 <br />meeting, that COM, Inc. will commit to placement of the full 24 inch rock <br />layer, and will incorporate a cost for placement of the rock cover into <br />the reclamation cost estimate. The rock layer tailing cover material will <br />have to be constructed from low pyrite rock in order to provide a non-acid <br />root zone. It is the Division's understanding that COM, Inc. will <br />stockpile sufficient rock cover material adjacent to the tailings in order <br />to reduce the amount of bond required, however, until such a stockpile is <br />in place, the bond will have to reflect the actual cost required to <br />borrow, haul, dump, and spread the rock. <br />You have stated that sufficient geotextile will be stored at the mill to <br />cover the tailings at the time of reclamation, and as such, that no cost <br />for purchasing geotextile should be included in the bond. There is a <br />mechanism to handle such an arrangement in the Mineral Rules and <br />Regulations. Please review Rules 4.3.10 and 4.9.3 to determine if COM, <br />Inc. would like to comply with the requirements involved in pledging <br />