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o Fed into process stream at the flotation cells via a metered feeder, undiluted solution concentration <br />• at 0.03 - 0.2 Ibs/ton of "ore". <br />Ball mill solution volume is approx. 15 cu. ft. of +/- 60% pulp density. <br />Flotation cell solution capacities are as follows (+/- 30% pulp density) <br />• I" Stage, (2) cell unit with total capacity of approx. 74.7 cu. ft. <br />• 2nd Stage, (4) cell unit with total capacity of approx. 33.6 cu. ft. <br />• 3`d Stage, (6) cell unit with total capacity of approx. 128 cu. ft. <br />As a part of normal mill operations, mill process water will be continuously monitored. A pH monitor and data <br />recorder will be installed at the tailings pump location within the mill. Should the pH reach a state outside of the <br />7.5-9 range that is necessary to precipitate the heavy metals, alarm notification will be activated for the operations <br />personnel. Recorded data is saved in 30 day increments, available for future audit. The submittal notes on this <br />Serfilco Model 432 monitor/recorder can be found attached in this Exhibit C. <br />If the pH falls outside of the 7.5-9 range, the operators are instructed to shut down the operation that delivers waste <br />to the impoundment. Once the source of the problem is corrected upstream in the process, waste can then be <br />continued to be discharged to the impoundment. It is practically impossible for heavy metals to be in solution under <br />these operating conditions (pH range of 7.5-9) as shown in the attached -A Water Handbook for Metal Minine <br />Operations, by Thomas R. Wildeman. <br />Storage of lubricants, oils, and greases may be as follows (see Best Management Practices within the SWMP <br />attached in the appendix of this Exhibit C): <br />• Any 55 gal. drums may be stored outside, on wooden pallets to prevent rusting of steel bottoms. Drum <br />openings shall be protected from rain with appropriate caps/plugs or a hand pump device installed. <br />• Any 5 gal. plastic buckets may be stored outside. Spouts shall have appropriate caps in place when not in <br />• use. <br />• Any quart containers, cartridges, or blocks shall be stored inside trailers. <br />In the event of spills of any of the above liquid chemicals (excluding water), absorbent cloths shall be used to collect <br />the liquids. Cloths containing flammable liquids shall be placed in an approved receptacle for such disposal, located <br />in the Ball Mill Trailer. Cloths containing non-flammable liquids can be disposed of in municipal waste receptacles. <br />Special disposal and handling methods of any particular material shall conform to those enumerated in the specific <br />Material Safety Data Sheet. A current collection of these documents shall be located next to the First Aid kit located <br />in the Ball Mill Trailer. <br />There are NO designated chemicals used in this proposed mining operation, therefore no special emergency <br />response plan is necessary. <br />In the event that there is a spill of feedstock (waste rock and/or ore), the operators are instructed to STOP the <br />activity and assess the situation. Once the source and cause of the spill have been determined, a plan shall be <br />devised to prevent any further spillage. After the source has been stopped, the spill may be cleaned up. Cleanup <br />shall include using machinery (loader, excavator, etc.) or manual tools (shovel, buckets, etc.) to scoop up the <br />material and return it to an appropriate place. An appropriate place is either the original point source, Crusher Feed <br />Pile or whichever conveyor or feeder mechanism the material has spilled from originally. This will place the spilled <br />material back into the regulated process stream. <br />In the event that there is a leak in the double-walled process water pipeline system that is sufficient to breach to the <br />environment, the operators are instructed to STOP operations and isolate the pipeline by closing appropriate valves <br />to prevent continued process stream flow. The pipeline shall then be repaired. The area should be allowed to <br />evaporate any escaped liquid water. Any remaining solid residues shall be collected in buckets, etc. and disposed of <br />in the lined tailings impoundment. To further reduce the potential for pipeline leaks, all lines containing process <br />Page 12 of 35