1987-01-08_REVISION - M1977493 - Laserfiche WebLink

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Because of past successes, the Climax plan for controlling and limiting fugitive particulate emissions from the dry areas of the tailing ponds will involve the continued use of Coherex as the primary dust suppressant. The materials, equipment, and technology will remain virtually unchanged. However, in order to increase the efficiency of the program and reduce and limit incidents such as occurred in 1986, Climax will add the following to its plan: o Expand the area of coverage to include the crests of the tailing dams. This coverage will include the tops of the dams and 60 to 100 feet down the faces from the tops. The dam crests are areas which have not been covered for a number of years and which are the initial and primary sources of windborne particulates. o More closely monitor the surface moisture conditions of the tailing ponds to better determine the proper timing for suppressant application. This is particularly important regarding the second application. C o Maintain a contingency supply of Coherex which may be required throughout the dry period for use on an ad hoc or emergency basis should unusual weather or wind conditions instigate an unanticipated and prolonged incident of fugitive emissions, and for spot applications, particularly along the crests of the dams. Zn addition to these immediate improvements in the control plan, Climax is investigating the engineering, technological, and economic feasibility o5 the following alternatives and/or additions to the dust suppression program: o Maintenance of the highest practicable level of wetted tailing surface through coordination of water levels and deposition areas with water control personnel. o Replacement of Coherex with a longer lasting cohesive product and/or increasing area application rates. o Utilization of more site=specific products such as (but not limited to) magnesium chloride on dam crest roads and erosion control mats or blankets on dam crests. C -5-