This action arises from a voluntary self-audit that the respondents (Halcon Resources Corporation, HRC Operating, LLC, Halcon Williston I, LLC, Halc?n Williston II, LLC, and HRC Energy, LLC (collectively, Halcon)) conducted pursuant to an agreement with the EPA and two EPA self-audit policies. Those policies are entitled Incentives for Self-Policing: Discovery, Disclosure, Correction and Prevention of Violations (Audit Policy), 65 Fed. Reg. 19,618-19,627 (April 11, 2000) and Interim Approach to Applying the Audit Policy to New Owners (Interim Approach), 73 Fed. Reg. 44,991-45,006 (August 1, 2008).