(1) In buildings or structures with mechanical ventilation, employers shall filter recirculated air with Minimum Efficiency Reporting Value (MERV) 13 or higher efficiency filters if compatible with the ventilation system. If MERV-13 or higher filters are not compatible with the ventilation system, employers shall use filters with the highest compatible filtering efficiency. Employers shall also evaluate whether portable or mounted High Efficiency Particulate Air (HEPA) filtration units, or other air cleaning systems would reduce the risk of transmission and shall implement their use to the degree feasible.
(2) The employer shall determine the need for a respiratory protection program or changes to an existing respiratory protection program under section 5144 to address COVID-19 hazards.
(3) The employer shall evaluate whether to halt some or all operations at the workplace until COVID-19 hazards have been corrected.
(4) Any other control measures deemed necessary by the Division through the Issuance of Order to Take Special Action, in accordance with title 8 section 332.3.