Feasibility Study and Technical Report - Pretivm

20.1.9 AIR EMISSION CONTROLSince most of the mining will be underground and most of the tailings will be storedsubaqueously, air emissions will not represent a significant component of contaminantdispersion for the Project. Baseline studies, utilizing on-site meteorological stations andwind monitoring stations, have collected atmospheric data in the Project area to allow forair dispersion modelling, which is to be completed as part of the EA process. Mitigationprocedures will then be developed to minimize adverse impacts from emissions. Regularmonitoring of emissions will assess the success of the mitigation methods, and warn ofany need to adjust the current approach.Pretivm will implement an air emissions plan to ensure that the levels of air emissionsgenerated by project activities are below the regulatory requirements of the Canada andBC Ambient Air Quality Objectives.Adverse effects from air emissions and fugitive dust will be minimized through theimplementation of mitigation measures such as:• the use of clean, high-efficiency technologies for diesel mining equipment• the use of appropriate emissions control equipment such as scrubbers• the use of low-sulphur diesel fuel when practical• the use of a vehicle fleet powered by diesel engines with low emissions ofnitrous oxide and hydrocarbons (greenhouse gases)• preventative maintenance to ensure optimum performance of light-dutyvehicles, diesel mining equipment, and incinerators• the implementation of a recycling program to reduce the amount of incineratedwastes, and hence CO2 emissions• the segregation of waste prior to incineration to minimize toxic air emissions.The use of electricity as primary source of power during operations, as opposed to on-sitegenerators, will also have a substantial impact on the reducing project-related airemissions.20.1.10 CLOSURE PLAN AND COSTSThe Project will be closed at the end of mining. This will involve the removal of allstructures and equipment, closure of the portals, and rehabilitation of site disturbances.The goal is to minimize the long-term effects on the environment and return the site to asclose to its pre-disturbance condition, as practical.Closure of the underground will include the removal of all loose material and mobileequipment such as ventilation fans and safety equipment. These will be removed fromthe site for reuse or will be recycled. Structures will be removed from the underground.Oil will be drained from all equipment and the oil disposed of in a regulated facility. Allfuel will be removed from the underground storage and distribution system and removedPretium Resources Inc. 20-21 1291990200-REP-R0012-02Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC