Section R. 408.14461 - Sand mullersRule 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.Mich. Admin. Code R. 408.14461