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The closed loop system is described as potable water floating across a vibrating (shaker)table to
<br /> accomplish gravity separation and recovery of precious metals from previously mined and processed
<br /> material from the Revenue Mine, Mill Tail Pad. Subject material(s) are already ground to an acceptable
<br /> sphere size,thereby eliminating further grinding;however,since we intend to similarly process waste rock,
<br /> i.e., rock mined and set aside because of its lesser presumed value,some blending of Mill Tails and Waste
<br /> rock is anticipated: precise blending ratio to be determined as part of our R&D. For this purpose, we
<br /> propose installing within the containment area a DC 24 10 HP Impact Mill, conveyor fed at a dry volume
<br /> rate of approximately 10 cubic yards per hour(YPH) mixed into a ground rock/water,slurry. Subject slurry
<br /> is then passed across a slightly tapered flat, vibratory surface to separate heavy, precious metals, from
<br /> lighter valueless,gangue material. All material passes across the vibratory table surface; however,various
<br /> materials are segregated as take-offs into various troughs about the perimeter of the table. Precious heavy
<br /> metals are recovered for further processing and lighter, valueless materials, are similarly recovered for
<br /> proper disposal. As to light gangue materials,this material will be returned to the Revenue Mine, Mill Tail
<br /> Pad from whence it came. The containment area shall contain a submersible dewatering pump,nameplate
<br /> plated rated 75 U.S.Gallons(USG)for emergency dewatering if required;75 U.S.Gallons(USG)being three
<br /> times the process flow rate of 25 U.S. Gallons(USG)
<br /> Ancillary equipment for the proposed closed-loop recovery system includes a sand filter; not
<br /> dissimilar from large commercial swimming pools; Seven-position valving (Filter, Backwash, Winter, Re-
<br /> Circulate, Closed, Rinse and Waste) a water feed tank to minimize pressure pulsations from feed water,
<br /> 12 times feed volume, or 300 U.S. Gallons (USG);various piping arrangements, intentionally oversized for
<br /> operation in laminar flow regions;e.g.,optimal flow for 25 U.S.Gallons(USG) per minute is 3/4 inch inside
<br /> diameter, the flow being 12.7 ft/second (ft/s); we propose 1 inch (gray) CPVC (a copolymer) piping to
<br /> assure laminar, non-turbulent flow(s)of 9.4 ft/second (ft/s). Laminar flow is considered to exist with fluid
<br /> velocities < 10 ft/second (ft/s), Additionally, CPVC piping is Underwriters Laboratory (U.L.) approved
<br /> whereas as to pressure/temperature ratings (white) PVC piping is not.
<br /> We do not envision any necessity for fugitive dust emission controls because ground material
<br /> exiting Impact Mill, a point in processing when fugitive dust would be anticipated, is in fact a water/rock
<br /> slurry, i.e., no fugitive dust is envisioned. Further, since grinding is our first process step, thereafter our
<br /> process material is a wet slurry.1, including SPLP and ABA testing will be submitted to the Division as part
<br /> of the Technical Revision. Phase 2 as described below will also be included in the Technical Revision
<br /> submission.
<br /> PHASE 2:
<br /> Upon completion of PHASE 1, Thorin Resources proposes disassembly of closed loop
<br /> system from the warehouse and transporting all equipment to the Revenue Mine site; near the Mill Tail
<br /> Pad, Equipment is to be installed in the railyard between the portal entrance and mill entrance. The
<br /> railyard will be modified to address secondary containment. The major distinctions involved in relocating
<br /> a closed-loop system from warehouse to an in-situ processing facility involve surface protection from
<br /> water spillage/system failure and water sourcing. To that end,we propose a concrete enclosure,effectively
<br /> 40 feet x 20 feet(800 ft.^z)and 2 feet in height,or 1,600 ft^3 which presents a containment area of 11,968
<br /> U.S. U.S. Gallons (USG). Water sourcing-shall be portal discharge water run-off, on-site, captured; and
<br /> retained as once again, a closed-loop system. Additionally, back-washed materials shall be analyzed for
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