R 408.14461 Sand mullers.

Rule 4461. (1) A sand muller, except for a continuous muller which does not require employee exposure, shall have interlocked enclosures over openings to prevent operation when loading or unloading. (2) For a muller having a sampling door, the employer shall provide, and an employee shall use, a sampling cone (scoop) to obtain a sample. (3) If a sample cone is used to obtain a sample, the sampling cone shall not contact the mixing mechanism and the employee using the sample cone shall not place his or her hand into the opening.