The term does not include work performed in subsequent manufacturing or processing operations, such as work performed in smelters, electrometallurgical plants, refineries, reduction plants, cement mills, plants where quarried stone is cut, sanded, and further processed, or plants manufacturing clay, glass, or ceramic products. Neither does the term include work performed in petroleum production, natural-gas production, nor dredging operations which are not a part of mining operations, such as dredging for construction or navigation purposes.
Haw. Code R. § 12-25-55