BHP Billiton Copper
BHP Billiton Investor Briefing, Copper Overview 7 1. Total Recordable Injury Frequency (TRIF) for ndida, Pampa Norte and Olympic Dam. 2. Incidents with uncontrolled release of energy for ndida, Pampa Norte and Olympic Dam. BHP Billiton Copper safety performance 12 month rolling average TRIF1 per million hours worked