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Hawaiian Cement’s David Gomes says his company was one of the first in North America to partner with CDE. The Puunene Quarry is now six years in with its CDE system. Photo: P&Q Staff

Hawaiian Cement’s David Gomes says his company was one of the first in North America to partner with CDE. The Puunene Quarry is now six years in with its CDE system. Photo: P&Q Staff