On May 31, 2018, Region 10 filed an expedited settlement agreement which both initiated and concluded an administrative action against the Butterfield Water Treatment Plant in Pasco, Washington for violations of CAA 112(r) Risk Management Program requirements. Respondent failed to comply with several risk management program requirements that apply to its use of chlorine. Most importantly, Butterfield Water Treatment Plant failed to have adequate process safety information on the design of the chlorine process, identifying and resolving compliance audit findings, and resolving process hazard analysis recommendations in preventing a chlorine release that could impact the community surrounding its facility. A plan provides important information to emergency responders and planners that include accurate chemical quantities, emergency contacts and demonstrate operation and maintenance of the chlorination system process at its facility. The municipality agreed to pay a penalty of $8,040.