Section 325.51860. Use of mechanical ventilation to control exposure to cadmium.

(1) If ventilation is used to control cadmium exposure, measurements that demonstrate the effectiveness of the system in controlling exposure, such as capture velocity, duct velocity, or static pressure, shall be made as necessary to ensure the ventilation system’s effectiveness.

(2)  Measurements of the system’s effectiveness in controlling exposure shall be made as necessary within 5 working days of any change in production, process, or control that might result in a significant increase in employee exposure to cadmium.

(3)   If air from exhaust ventilation is recirculated into the workplace, the system shall have a high-efficiency filter and be monitored to ensure effectiveness. Recirculation of local exhaust air shall be in compliance with Occupational Health Standard Part 520 “Ventilation Control,” as referenced in R 325.51851a.

(4)   Procedures shall be developed and implemented to minimize employee exposure to cadmium when maintenance is performed on the ventilation systems and when filters are changed.

History: 1993 AACS; 2013 AACS.