EPA Region 6 issued an Administrative Complaint (APO) under its authority pursuant to Section 309 of the Clean Water Act (CWA) to CSC Oil Company (Respondent) which operates an oil field production facility located in Osage County, Oklahoma. The APO was issued in response to violation of Section 301 of the CWA for discharging fluids high in Total Dissolved Solids to waters of the U.S. The APO proposes that Respondent pay a penalty of $7,000.00. Respondent must respond to EPA Region 6 within thirty days of receipt of the Complaint.