_GENERAL DOCUMENTS - M1988112

• Permit No: M1988112
• IBM Index Class Name: GENERAL DOCUMENTS
• Doc Name: Monitoring Requirement Summary
• Media Type: D
• Archive: No

The mill will be a closed circuit with backup systems to ensure that
no cyanide solutions will escape the mill . Mill facilities design
specifications will be submitted to the Division upon completion.
Cyanide will be stored in a secured area. The area will include a
concrete base with curbs to ensure containment in the event of a
spill . Cyanide will be shipped to the site in Flo-Bins. Flo-Bins are
specially designed, heavy metal containers used by DuPont for
shipment of sodium cyanide. Flo-Bins are accepted by the Department
of Transportation as a safe shipping container for cyanide. The Flo-
Bins are returnable and will not be disposed on site. Each Flo-Bin
is numbered and the numbers are tracked by DuPont to ensure that each
container is returned.
D.6 Tailings Disposal
D.6.1 General Design Concepts
The tailings from the mill circuit will be disposed in
a slurry form from the processing and treatment facilities.
The slurry will be delivered to the tailings disposal area by
pipeline using gravity and pumped delivery. The disposal system
has been designed as a closed circuit, zero discharge facility.
The solid and liquid portions of the tailings will remain
contained within the facility. The proposed management of the
facility will alleviate the potential of a detrimental impact
to the surface water and groundwater of the project area and
vicinity. The facility is capable of containing up to and
including the probable maximum precipitation event during
operations. The disposal area will be constructed with a liner
system which has been chosen to provide containment and
collection of the tailings water.
The tailings will be deposited by spigotting around the
perimeter of the disposal area. The proposed method of
tailings deposition is the managed thin layer deposition
technique. This technique promotes deposition of thin layers
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