293.120. Air safety requirements. - Missouri Statutes

Air safety requirements.

293.120. Air in which men work or travel in mines shall beimproved when:

(1) It contains less than nineteen and five-tenths percentoxygen;

(2) It contains more than one-hundredth percent carbonmonoxide;

(3) It contains more than five-tenths percent carbondioxide;

(4) It contains more than one percent methane; or

(5) Is contaminated with dust or with noxious or poisonousgases in excess of accepted limits as established by the directorof the division of mine inspection.

(L. 1959 S.B. 188 § 13)