PDFWAC 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.
[Statutory Authority: RCW 51.04.020 and 51.16.035. WSR 23-23-155, § 296-17A-1701, filed 11/21/23, effective 1/1/24. WSR 07-01-014, recodified as § 296-17A-1701, filed 12/8/06, effective 12/8/06. Statutory Authority: RCW 51.16.035. WSR 98-18-042, § 296-17-548, filed 8/28/98, effective 10/1/98; WSR 85-24-032 (Order 85-33), § 296-17-548, filed 11/27/85, effective 1/1/86; Order 73-22, § 296-17-548, filed 11/9/73, effective 1/1/74.]