The purpose of the California Accidental Release Prevention (CalARP) Program is to reduce the risk of accidental releases of hazardous chemicals from stationary sources that could endanger public health and the environment. Only a limited number of facilities are subject to this program. Fewer than 20 facilities in Yolo County are subject to the California Accidental Release Prevention (CalARP) Program. Facilities that are subject to the program must prepare and maintain a Risk Management Plan (RMP) that identifies regulated hazardous substances, evaluates potential release scenarios, documents prevention and safety measures, and outlines emergency response procedures to minimize the impact of an accidental release.

Common regulated chemicals include ammonia, chlorine, sulfur dioxide, butane, and certain fumigants. Facilities typically subject to the CalARP Program include cold-storage warehouses, water and wastewater treatment plants, and industrial chemical manufacturers and distributors.

Additional information, including the regulations, is available at the Governor's Office of Emergency Services (Cal OES).