LS ™ 600: BOART LONGYEAR DRILLING SERVICES Case Study: A 400% Internal Rate of Return Product: LS™600 sonic rig Location: Northwest Nevada Application: Sonic sampling and well installation of heap leach pad (gold) Vital Stats: • 6,100 ounces of gold, $8 million ($1,300 per ounce average), extracted from heap leach pad in the first 17 months • Project was paid for within the first 70 days • 400 percent internal rate of return (IRR) for

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