2010-03-16_REVISION - M1981185 (29)

Home Browse Search

Mayday Mine and Mill Site, Wildcat Mining Corporation, 110(2) Permit Amendment Exhibit C • At the flotation tailings box, a biodegradable surfactant (Dowfax) may be added as needed. The flotation reagents to be used will be added at a conditioner following the mineral concentrator tables. The flotation reagents to be used include (MSDS are presented in Attachment C -2): o a xanthate (probably Aeroxanthate 350) at a rate of 0.10 -0.15 lbs /ton; o a dithiophosphate (probably Aeroflot 208) at a rate of 0.025 -0.05 lbs /ton; 0 50/50 solutions of MIBC (Methyl isobutyl carbinol) and terpineol (Pine Oil) at a rate of 0.05 to O.10 lb /ton of a pound per ton of ore. Soda ash is a dry reagent and will be stored in 50 lb bags and xanthate stored in large drums. All of the concentrated reagents will be stored in separate shipping containers and liquid reagents will have drip pans under the barrels of individual reagents. In the process stream much of the soda ash will be recycled in solution as will some of the sodium silicate and the surfactant. The xanthate for the most part will reside with the mill concentrate. Storage tanks in the plant will consist of a recycle water tank (169 cu. ft.) , the conditioner (50 cu. ft.), and the flotation equipment (320 cu. ft.). Following the flotation circuit, material will be slurried to stopes for sampling and underground disposal in proximity of the Mayday Stope. (Mayday -Idaho La Plata County Colorado - Technical Report January, 2009. No tailing ponds are contemplated for the Mayday milling process. The disposal of the tails within the old works mitigates surface impacts and reclamation concerns. Water quality concerns associated with the disposal activity will be non - existent. (n) Commodities to Be Extracted Gold and silver concentrate will be produced during the mining /processing process. • (o) Explosives (Rule 6.3.3(1)(0) and 6.5(4) Explosives will be used underground at the Mayday Mine in accordance with an approved and noticed blasting plan between the hours of 10:00 a.m. and 2:00 p.m. during a normal work day. Explosives will be conducted under contract to Franklin Drilling and Blasting. (Explosives used to date and in the future are Dyno Nobel's "Red H B ", underground permissible dynamite (See Attachment C -7) along with Fume Class I ANFO). Typical underground blasting methods will be used as described in an Analysis of the Effect of Blasting Operations for the adjacent Idaho Mine (Attachment C -7). Since the Mayday Mine is located further from adjacent structures than the Idaho mine, no structural damage to adjacent buildings or houses is predicted or anticipated. Blasting reports will be prepared for each shot and retained for three years. The blasting report will contain the following information: • Location, data and time of blast Name, signature and license number of blaster in charge , Identification, direction and distance in feet from the nearest blast hole to the nearest potentially affected structure either: • Not located in the permit area or • Not owned nor leased by the person who conducts the mining operations; Types of material blasted • March 12, 2010 Amendment M- 1981 -185 10