Supporting Technical Assessments

83 80 88 75 105 80 91 99 HQ Coring RS CW RS CW CWRS CW HW HW HWMW 41 55 67 94 92 70 77 87 from 10.5m: becomes completely weathered, very weak from 10.6m: becomes residual soil, extremely weak from 10.69m: becomes completely weathered, very weak from 15.7m: becomes weak from 19.5m: becomes highly weathered-moderately weathered, weak-moderately strong Coromandel Volcanics 10.0 [] -Extremely Weathered (EW) material not counted as > 100mm for RQD -Only Drill Break (DB) observed (No evidence of staining etc in breaks) -Crushed zone caused by drilling at 11.11-11.20: Subhorizontal, stepped, rough, fine to coarse sand + gravel -Crushed zone caused by drilling at 11.35-11.59: Subhorizontal, stepped, rough, fine to coarse sand + gravel, no staining in either crushed zone -NOTE: DB had not been included in RQD -DB at 14.514.56 -Joint at 15.03: Steeply inclined, narrow, undulating, rough, Manganese staining -Crushed zone at 17.2-17.32: Subhorizontal, stepped, rough, medium to coarse gravel, no staining present -Joint at 18.08: Steeply inclined to very steeply inclined, narrow, undulating, rough, minor Mn staining -Joint at 18.38: Steeply inclined to very steeply inclined, narrow, inclined, rough, no staining present PO Box 6543 Auckland 1141 GHD Limited Project Quattro OceanaGold Ltd Waihi 51/37083 Site Identification: Logged: Processed: Checked: Project: Client: Site: Job No.: WRS04a JM/HB AS HB BOREHOLE with Piezo LOG Commenced: 08-Jun-17 Completed: 08-Jun-17 Contractor: Perry Geotech Datum: Total Depth: 21.0m Sheet 2 of 3 BOREHOLE LOG NZ ALT 5137083_NZ LIB_PROJECT QUATTRO - WRS HB COMPLETE DRAFT_REV 1 FINAL.GPJ NZ GINT DATA TEMPLATE VER 1.3.GDT 30/4/19 Piezometer Shear Vane: Drilling Method 11 12 13 14 15 16 17 18 19 20 -90 Comments: ROCK DESCRIPTION: Weathering, colour, fabric, ROCK NAME (Formation Name) W MS VS S from 12.66m: becomes completely weatheredresidual soil, extremely weak from 13.5m: becomes highly weathered Water Bore Diameter (mm): Inclination: VW ES Core Run / Recovery (%) 20 60 200 600 2000 SOIL DESCRIPTION: (Soil Code), Soil Name [minor MAJOR], colour, structure [zoning, defects, cementing], plasticity or grain size, secondary components, structure. (Geological Formation) / Defect Spacing (mm) RQD (%) Estimated Rock Strength EW Graphic Log Classification Support / Casing (m) JD Tractor Rig Depth (m)/ [Elev.] Equipment: Weathering Consistency/ Relative Density Moisture Condition TESTS & SAMPLES / ROCK MASS DEFECTS: Depth, Type, Inclinations, Roughness, Texture, Aperture, Coating Geological Fm 11 12 13 14 15 16 17 18 19 20 96 from 13.1m: becomes completely weathered, weak-very weak

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