Illinois Compiled Statutes 225 ILCS 705/24.06 – All rock dust used shall meet the following specifications: …
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All rock dust used shall meet the following specifications:
1. All of the dust shall pass through a 20 mesh sieve, and at least 70% shall pass through a 200 mesh sieve.
2. The dust shall not contain more than 5% combustible matter, nor more than 5% free silica. The rock dust should be as light in color as possible.
1. All of the dust shall pass through a 20 mesh sieve, and at least 70% shall pass through a 200 mesh sieve.
2. The dust shall not contain more than 5% combustible matter, nor more than 5% free silica. The rock dust should be as light in color as possible.