Engineering professionals on staff at McClelland Laboratories facilities are available to serve you on a consulting basis. Engineers on our staff can be assigned based on their expertise for your particular needs. McClelland Laboratories, Inc. routinely works with private consultants throughout the world. A private consultant will be recommended to you if our engineers lack the expertise to meet your needs and objectives.

Consulting in the following areas can be arranged for you.

	Metallurgical
	Environmental
	Geotechnical
	Permitting

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Enviromental

McClelland Laboratories provides detailed environmental characterization evaluations for potential of mine solids to mobilize constituents on contact with meteoric water and potential to produce or neutralize acid in natural weathering and oxidizing conditions to assist you in identifying potential environmental impacts which may require prevention during processing or mitigation on closure.

Constituent Mobility Potential Tests

	NDEP - Meteoric Water Mobility Procedure
	US EPA Method 1312 (SPLP)

Potential for Acid Rock Drainage Tests

	Static - Modified Acid/Base Accounting (Mod ABA)
	Kinetic - Humidity Cell Test Procedure (20 weeks plus)

Soils Attenuation Tests for Land Application of Wastewater

	Sequential Batch Test - synthetic solution, if process water is not available
	Column Percolation Test - if process water is available

Heap Neutralization Rinse Down Tests

	On Column Leach Test Residues - if during project development phase
	On Actual Commercial Heap Residues, at Heap Height - if mine closure data is required
	Recirculation Rinse (carbon adsorption - barren recycle) and Chemical Oxidation of Rinse Effluents (H₂O₂, SO₂/Air, O₃, and OCl^-) procedures available

Pit Water Quality Studies

	Potential for Constituent Mobility and Acid Rock Drainage on Final Pit Wall Core Samples
	Determination of Ultimate Pit Water Quality - computer modeling is normally required

Infiltration Pond Soils (Solids) Attenuation/Mobilization Tests

	Determine Suitability of Potential Infiltration Pond Site for Pit Dewatering During Mining
	Determine Attenuation of Constituents in Pit Water by Infiltration Pond Site Soils
	Determine Potential for Constituent Mobility from Infiltration Pond Soils after Contact with Pit Water
	Determine Water Quality of Effluent from Infiltration Pond Soils

Tailings Impoundment Characterization Studies

Normally Tailored Protocol to Simulate Site Specific Conditions

Bio-Mass Substrate Evaluations for Passive Wastewater Treatment

Normally Tailored Protocol to Simulate Site Specific Needs

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Testing

McClelland Laboratories offers the following general metallurgical testing capabilities to assist you during exploration and project development phases of your mining project. Additional testing evaluations, specifically tailored to meet your site specific needs and objectives, can be designed and conducted after detailed discussions with you.

Preliminary Cyanidation Tests (Agitated Tests)

	Heap leach process option on drill cuttings and/or crushed core or bulk ore samples
	Milling process option - grind size and leach condition optimization tests on ball mill ground drill cuttings, core, and bulk ore samples

Heap Leach Cyanidation Tests (Percolation Tests)

	Heap leach crush size optimization column leach tests on crushed core and/or bulk ore samples
	Head and tail screen analyses
	Water balance considerations (saturation and retained moisture and drain down rate and volume)

Carbon Adsorption Capacity and Adsorption Rate Tests

	CIC for heap leach process option
	CIP, CIL for milling process option

Other General Testing Services

	Gravity Concentration - precious metal and sulfide ores
	Flotation Beneficiation - precious metal, copper, and base metal ores
	Oxide Copper Leaching - milling and heap leach process options
	Agglomeration Optimization - alkaline binder for precious metal ores, acid agglomeration for copper ores
	Bulk Density Determinations - core or rock pieces

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Sparks

ENGINEERING STAFF AVAILABLE AT McCLELLAND LABORATORIES, INC.
SPARKS, NEVADA USA

GENE E. McCLELLAND - President, MLI
B.S. Chemistry, M.S. Metallurgical Engineering. Experience(30 years) in precious and base metals and environmental research, testing, and consulting with the U.S. Bureau of Mines, Bateman Metallurgical Laboratories, and McClelland Laboratories, Inc. (1987 to present). Over 100 publications, presentations and patents (3) related to precious metals processing and environmental considerations. Over 3000 research/testing projects related to precious and base metals processing and environmental impact prevention and/or mitigation. Taught a heap leach short course for 10 years and an environmental short course for 3 years.

JACK S. McPARTLAND - Vice President of Operations, MLI
B.S. Chemical Engineering, M.S. Metallurgical Engineering, University of Nevada (Reno), Certified Environmental Manager, State of Nevada. 10 years experience in precious and base metals and environmental research and testing. International consulting experience on precious metals processing projects. Experience in bio-oxidation processing of precious metals and copper bearing sulfide ores for milling and heap leaching processes. Treatment of refractory precious metal ores. Five publications-presentations related to metallurgical processing and environmental concerns.

HAROLD J. HEINEN - Consulting Metallurgist, MLI
B.S. in Chemistry (Hope College, 1937), M.S. in Chemistry (University of Nevada, 1939). 55 years of experience in metallurgy research, development and testing, most of which at the U.S. Bureau of Mines (Reno). Mr. Heinen is credited by the mining industry for development of carbon desorption technology, CIP and CIL processing methods, reduction to practice of heap leaching technology, and along with Mr. G. E. McClelland, the development of agglomeration-heap leaching technology. Over 40 publications and 20 patents related to above mentioned developments.

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ENGINEERING STAFF AVAILABLE AT McCLELLAND LABORATORIES, INC. SPARKS, NEVADA USA

ENGINEERING STAFF AVAILABLE AT McCLELLAND LABORATORIES, INC.
SPARKS, NEVADA USA