All researchers unable to eliminate methylene chloride from their processes must adhere to a Methylene Chloride Workplace Chemical Protection Program to limit lab personnel exposure. The program must include the following:
- Initial monitoring – All lab personnel or a single individual in an area representing the worst-case scenario will be monitored by EHSS for methylene chloride exposure.
- Establishment of a regulated area – Areas where airborne concentrations of methylene chloride exceed exposure limits must be marked as a designated area with restricted access.
- Exposure control plan – All users must identify and implement exposure controls to reduce inhalation exposure to a level at or below the 8-hour TWA (2 ppm) or STEL (16 ppm). This may include a description of the regulated area, engineering controls, restricted access to regulated areas, and reporting procedure for any changes that may increase lab personnel exposure.
- Respiratory Protection and Personal Protective Equipment (PPE) – Respiratory protection (supplied air) will be required in areas when inhalation exposure exceed acceptable limits. Chemical resistant gloves such as polyvinyl alcohol (PVA) or Silver Shield are required to prevent dermal exposure.
- Training – Lab personnel will be required to compete training prior to working in methylene chloride restricted areas.
- Periodic Monitoring – Restricted areas will be monitored periodically by EHSS staff for inhalation exposure depending on risk or if there are procedural changes.