Feasibility Study and Technical Report - Pretivm

solution strength. The solution will be stored a holding tank prior to being pumped bymetering pumps to the thickener feed wells.Anti-scalant chemicals will be delivered in liquid form and added to the process watertank as required to minimize scale build-up in the water pipelines and processequipment. This reagent will be added in undiluted form.A mixing, holding, and dosing system will be provided to occasionally test any newreagents that may improve the metallurgical performance for better metal recovery.These reagents will be handled in accordance with Material Safety Data Sheet (MSDS)requirements, and any unused test reagents will be returned to the suppliers for disposal.To ensure containment in the event of an accidental spill, the reagent preparation andstorage facility will be located within a containment area designed to accommodate110% of the content of the largest tank. The storage tanks will be equipped with levelindicators and instrumentation to ensure that spills do not occur during normaloperation. Appropriate ventilation, fire and safety protection, and MSDS stations will beprovided in the area.Each reagent line and addition point will be labelled in accordance with WorkplaceHazardous Materials Information Systems (WHMIS) standards. All operational personnelwill receive WHMIS training, along with additional training for the safe handling and useof the reagents.ASSAY AND METALLURGICAL LABORATORYThe assay laboratory will be equipped with the necessary analytical instruments toprovide all routine assays for the mine, process plant, and the environmentaldepartment. The most important assay laboratory instruments include:• fire assay related furnaces and devices• one atomic absorption spectrophotometer (AAS)• two ICP, including one ICP-mass spectrometer (MS) for environmental sampleanalysis• one Leco furnace.The metallurgical laboratory will undertake all the necessary test work to monitormetallurgical performance and, more importantly, to improve process flowsheet unitoperations and efficiencies. The laboratory will be equipped with laboratory crushers andball mills, particle size analysis sieves, bench scale flotation cells, centrifugal gravityconcentrators, leach units, filtering devices, balances, and pH meters. The personalprotection devices and items will be provided to protect the workers.WATER SUPPLYTwo separate water supply systems will be provided to support the operations for theprocess plant – one fresh water supply system, and one process water supply system.Pretium Resources Inc. 17-13 1291990200-REP-R0012-02Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC