On December 1, 2010, Region 10 filed an Expedited Settlement Agreement (ESA) which both initiated and concluded an administrative action against Tri-City Water Pollution Control Plant for violations of CAA § 112(r) risk management program requirements. The Region alleged that the Tri-City Water Pollution Control Plant failed to comply with several risk management program requirements for the use of chlorine to treat drinking water supplied to West Linn, Oregon City, and Gladestone communities in Oregon. The violations have since then been corrected. Under the terms of the ESA, the municipality paid a penalty of $3,300.