Feasibility Study and Technical Report - Pretivm

10.3 PRETIVM DRILLINGThe 2011 diamond drill program was the first in almost 20 years that was focusedspecifically on defining high-grade resources. In 2011, a total of 178 holes werecompleted totalling 72,805 m in holes SU-110 to SU-288. Included in this were 97 holes(41,219 m) targeted at VOK, 16 holes (7,471 m) at West Zone, and 21 holes (7,220 m)targeting the surrounding areas. The remaining drilling was focused on expansion ofShore Zone, testing for structurally controlled high-grade mineralization in Galena Hill(now part of VOK) and Bridge Zones, and testing new target areas. Drill collarcoordinates, and results of the drilling in 2011 are described by P&E in Ghaffari et al.(2012).The 2012 diamond drill program was focused on defining the high-grade resource atVOK, specifically targeting geological and structural features believed to be associatedwith gold mineralization. Diamond drilling was also focused on expanding VOK, both westof the Brucejack Fault and along trend to the east of the main mineralized zone. A totalof 301 drillholes (105,571 m) were competed in holes SU-289 to SU-589 as part of the2012 drilling program.In 2011 and 2012, the drilling contractors were Radius Drilling from Prince George BC,and Matrix Drilling from Kamloops BC. They both used Hydracore drill rigs.Core sizes for Pretivm’s surface collared drillholes are PQ (85 mm diameter), HQ(63.5 mm diameter) and NQ (47.6 mm diameter). Approximately 50 to 60% of core is HQsize. For drillholes less than 600 m length, core size is commenced at HQ and is reducedto NQ when conditions require. For drillholes greater than 600 m length, thecommencing core size is PQ, which is run down to approximately between 200 and300 m in order to minimize drill path deviation.Drill collars were surveyed by McElhanney Surveying from Terrace, BC. McElhanneySurveying use a total station instrument and permanent ground control stations forreference and have completed all the surveying on the project since 2009. Drillholepaths are surveyed at a nominal 50 m interval using a Reflex EZ single shot instrument.Drill core logging and handling procedures were the same for all three programs. At theend of each drill shift, all core were placed in wooden boxes (Figure 10.1), labelled bydrillhole and interval and transported to the core logging and core splitting facility on siteby snowcoach (Figure 10.2) or helicopter. The sample boxes were covered to avoidsample loss or contamination during transportation (Figure 10.2).Pretium Resources Inc. 10-2 1291990200-REP-R0012-02Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC