Published on: May 28, 2021

Toxic process gases (TPGs) — specifically chlorine gas, anhydrous ammonia, and sulfur dioxide — pose a variety of health and safety risks in the workplace. This self-assessment tool provides a series of questions to assist employers in identifying the risks and assessing their control plans.

Toxic process gas safety in water and wastewater treatment facilities: Guide to risk identification and controls for employers is designed as a fillable template to guide employers at water treatment, water distribution, and wastewater treatment facilities through a site assessment to identify the risks posed by TPGs and review the effectiveness of their exposure control plans and emergency plans. The tool also helps employers identify areas needing additional attention and provides space to record dates and actions to be taken.

For related information and resources, view our Chlorine and Ammonia webpages.