Feasibility Study and Technical Report - Pretivm

propane consumption. Table 16.18 shows the monthly and annual propanerequirement.Table 16.18MonthPropane ConsumptionPropaneConsumption(L)January 123,984February 68,548March 44,881April 5,976May 22June 25July 31August 35September 38October 164November 45,417December 90,762Total 379,883Propane for mine air heating will be required to be delivered to site approximately sixmonths of each year. The Project site will be accessible by a planned permanent routethat begins at km 215 of Highway 37 which extends to the Bowser Transfer Station. Atthe Bowser Transfer Station, all equipment and supplies will be transferred onto a Huskytrackedvehicle for transport to the mine site.The access route is subject to avalanche risk and extreme winter weather. To avoid mineproduction interruptions, a one-week supply of propane capable of supporting a constantair temperature of -25°C should be maintained on site. This equates to a tank farm offour 45,000 L tanks.The propane delivery strategy to site is as follows:• An 18,000 L propane delivery truck drives from Terrace, BC to the BowserTransfer Station.• The truck will transfer its load into a 24,000 L tank. The ISO tanks will bemodularized and skid mounted, and sized to meet the footprints and weightscapable of being transported on the tracked vehicles.• At the mine site, the tanks will transfer propane into the site tank farm.• The tanks will supply propane to the heaters by means of a buried pipeline.The frequency of propane delivery is dependent upon the air temperature and airflowvolume required for the mine. During the coldest month of the year−January−at thePretium Resources Inc. 16-69 1291990200-REP-R0012-02.1Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC