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Avoidance of danger from gas in waste.
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57.—(1) This section applies to waste other than—
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(a) waste which is—
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(i) stopped off in a prescribed manner or in such other manner as may be approved by an inspector by notice served on the manager of the mine in which it is contained, or
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(ii) stowed up; or
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(b) other waste known to contain—
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(i) no inflammable gas, and
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(ii) either no noxious gas or no noxious gas in a dangerous concentration.
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(2) It shall be the duty of the manager of every mine which contains any waste to which this section applies to secure either—
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(a) that there is constantly produced in that waste ventilation adequate, in accordance with section 56, for the purposes mentioned in subsection (1) of that section; or
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(b) that appropriate steps are taken for the purpose of minimising dangerous emissions from that waste of inflammable or noxious gas.
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