262.06(1)Prior to an employee entering a confined space, an employer shall ensure that a competent person tests the atmosphere of the confined space, taking into consideration the stratification of air contaminants and oxygen to ensure that the atmosphere is within acceptable limits.

262.06(2)The results of a test referred to in subsection (1), including the time and date the test was conducted, shall be documented and posted conspicuously at the entrance to the confined space.