BST Case Study Situation Xstrata Zinc’s Brunswick Mine is one of the largest underground lead-zinc mines in the world. The mine employs 900 people who cover two shifts, seven days a week, producing zinc, lead, copper, and bulk concentrates. In operation since 1964, the mine has produced nearly 133 million tons of ore. Since the 1980s, the mine has made significant strides in safety performance, for instance reducing recordable injuries from

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