On June 12, 2013, EPA Region 6 issued an Administrative Order (AO) under its authority pursuant to Sections 308 and 309 of the Clean Water Act (CWA) to Polk Operating, LLC (Respondent) located in Jefferson County, Oklahoma. The AO was issued in response to violation of Section 301 of the CWA. The violation is for an unauthorized discharge of produced water and drilling fluid wastes to a water of the U.S. The AO requires Respondent to (1) cease all discharges of pollutants from the facility; (2) remove all drilling fluid wastes, produced wastewater, and oil from the tributary of Red Creek, located at Latitude 34° 0.222 North and Longitude 97° 49.500 West; (3) remove all drilling fluid wastes, produced wastewater, and oil from the tributary of Sam Suell Hollow Creek, located at Latitude 33° 59.118 North and Longitude 97° 49.182 West; (4) and to submit written documentation in the form of certification.