2009-09-25_PERMIT FILE - M2009076 (22)

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• ment lubrication - f i k t d/ 60 t fi ll b d/ 5 d • . s or equ p on uc or quar ve ga e s an or ( ) rum an Motor oil, upto (1) 55 gal. • Automatic Transmission Fluid, upto (1) 55 gal. drum and/or (5) five gallon buckets and/or 60 quarts - for equipment lubrication. • Hydraulic Oil, upto (1) 55 gal. drum and/or (5) five gallon buckets - for equipment lubrication. • Bearing Grease, upto (10) cases of 12 -14 oz. cartridge tubes - for equipment lubrication. • Open Gear Grease, upto (10) cases of 12 -14 oz. cartridge tubes - for equipment lubrication. • Electric Motor Bearing Grease, upto (10) cases of 12 -14 oz. cartridge tubes - for equipment lubrication. • Block Grease, upto (10) 50 pound cases - for equipment lubrication. • Cup Grease, upto (2) 120 pound drums - for equipment lubrication. • Hydrated Lime, upto (100) 50 pound bags - for processing pH control and sulfide mineral depressant. o Stored outside on a wooden pallet, tarped to keep out moisture. o Added to process stream at ball mill inlet by a metered feeder at a rate of 2-51bs/ton of "ore". The feeder is capable of storing 50 pounds at a time. • Soda Ash, upto (100) 50 pound bags -for processing pH control and sulfide mineral depressant/separator. o May be used in place of Lime o Stored outside on a wooden pallet, tarped to keep out moisture. o Added to process stream at ball mill inlet by a metered feeder at a rate of 2-5 lbs/ton of "ore". The feeder is capable of storing 50 pounds at a time. • Aerofloat 208 Promoter, upto (1) 55 gal. drum, liquid - for flotation chemistry. o Promotes collection of metallics into a froth. o Stored in Flotation Trailer. o Fed into process stream at the flotation cells via a metered feeder, undiluted solution concentration at 0.01- 0.1 lbs/ton of "ore". • Aerofloat 242 Promoter, upto (1) 55 gal. drum, liquid - for flotation chemistry, o Promotes collection of metallics and sulfide minerals into a froth. o Stored in Flotation Trailer. • o Fed into process stream at the flotation cells via a metered feeder, undiluted solution concentration at 0.02 - 0.15 lbs/ton of "ore". • Aero 317 Xanthate Promoter, upto (1) 55 gal. drum, solid pellets - for flotation chemistry. o Promotes collection of metallics and sulfide minerals into a froth. o Stored in Flotation Trailer. o Fed into process stream at the flotation cells via a metered feeder, 10-20% solution concentration at 0.05 - 0.2 lbs/ton of "ore". • Pine Oil Frother, upto (1) 55 gal. drum, liquid - for flotation chemistry. o Creates a stable, robust froth that has selective properties for sulfide minerals. o Stored in Flotation Trailer. o Fed into process stream at the flotation cells via a metered feeder, undiluted solution concentration at 0.03 - 0.2 lbs/ton of "ore". Ball mill solution volume is approx. 15 cu. ft. of +/- 60% solids by weight pulp. Flotation cell solution capacities are as follows: • 1' Stage, (2) cell unit with total capacity of approx. 74.7 cu. ft. • 2°d Stage, (4) cell unit with total capacity of approx. 33.6 cu. ft. • 3`d Stage, (6) cell unit with total capacity of approx. 128 cu. ft. As a part of normal mill operations, mill process water will be continuously monitored. A pH monitor and data recorder will be installed at the tailings pump location within the mill. Should the pH reach a state outside of the 7.5-9 range that is necessary to precipitate the heavy metals, alarm notification will be activated for the operations personnel. Recorded data is saved in 30 day increments, available for future audit. The submittal notes on this Serfilco Model 432 monitor/recorder can be found attached in this Exhibit C. If the pH falls outside of the 7.5-9 range, the operators are instructed to shut down the operation that delivers waste • to the impoundment. Once the source of the problem is corrected upstream in the process, waste can then be continued to be discharged to the impoundment. It is practically impossible for heavy metals to be in solution under 10