WAC 296-17A-1701. Classification 1701

1701-02 Ore reduction, by wet or dry process without application of heat at mine Applies to: • Businesses engaged in the reduction of coarse ores by a wet or dry process without the application of heat at a mine site. • Businesses milling ores to recover nonmetallic minerals, that do not require amalgamation or flotation, at a mine site. Work activities and processes include, but are not limited to: • Crushing, screening, and washing ores; • Rotating ores in a cylindrical mill containing steel balls, flint pebbles, rods or rock for further grinding; • Amalgamation - Introduction of a chemical such as mercury to break down the ores into parts to obtain concentrated ores of metals; • Flotation - Using water to separate parts by buoyancy and density to obtain concentrated ores of metals; • Milling ores without amalgamation or floatation to recover nonmetallic minerals. Exclusions: • Underground mining operations are classified in 1702; • Open cut mining operations are classified in 1703.