MINING — ore milling — including sample analysis, crushing, concentration and separation
This classification applies to the processing of ore for the purpose of recovering metals or minerals, including but not limited to gold, silver, nickel, graphite, coke, zinc and iron.
Surface mining (open pit method) of ores or minerals shall be separately classified as 1122, Mining — surface.
Underground mining operations shall be separately classified as 6251, Tunneling or Underground Mining.
Smelting, sintering, refining or alloying operations shall be classified as 1438, Smelting, Sintering, Refining or Alloying.
Shown below is the previously published phraseology and footnote | Effective Date |
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Phraseology: Footnote: Smelting, sintering, refining or alloying operations shall be classified as 1438, Smelting, Sintering, Refining or Alloying. | 9/1/2021 |
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