(225 ILCS 705/31.10) (from Ch. 96 1/2, par. 3110)
Sec. 31.10.
If the State Mine Inspector finds methane with a multi-gas detector, permissible methane detector, air analysis, or other
recognized means, in the amount of 0.25% or more, in any open workings of
such mine when tested at a point not less than 12 inches from the roof,
face or rib the mine shall be classified as gassy. Nothing in this Act
shall preclude the reclassification of a mine that has been classified
gassy if a subsequent examination, made by the State Mine Inspector in the
method provided herein, shows the methane content to be less than 0.25%.
(Source: P.A. 99-538, eff. 1-1-17.)
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