What is the recommendation for filters that have been exposed to oil?

The recommendation to replace filters that have been exposed to oil after the shift aligns with the safety standards set forth by NIOSH (National Institute for Occupational Safety and Health). Oil exposure can compromise the integrity and effectiveness of filters, which are essential for protecting workers from harmful airborne contaminants, including asbestos fibers.

When filters become contaminated with oil, they may not function properly, leading to inadequate protection for the user. Therefore, replacing them after each shift ensures that workers have the highest level of respiratory protection during their work processes. This proactive approach helps to maintain safety standards in environments where exposure to hazardous materials is a concern.

In contrast, the other options either suggest inadequate frequency of replacement or imply that filters can be cleaned and reused, which underestimates the risks associated with contaminated filters. Such practices can endanger workers’ health by exposing them to potentially harmful substances without the necessary protection.