This is the first joint judicial enforcement action involving EPA and BSEE claims in response to alleged violations of both the Clean Water Act and OCSLA. The United States' complaint, which was filed in February 2013, in the U.S. District Court for the Eastern District of Louisiana, alleges that oil and an unauthorized chemical dispersant were discharged into the Gulf of Mexico from ATP-IP's oil and gas production platform known as the ATP Innovator. A BSEE inspection of the ATP Innovator in 2012 revealed alleged unlawful discharges of oil and a piping configuration that routed an unpermitted chemical dispersant into the facility's wastewater discharge pipe to mask excess oil being discharged into the ocean. At the time of the discovery, ATP Oil & Gas Corp. (ATP) was the operator of the facility, and ATP-IP was, and remains, the owner. The ATP Innovator was operating in the Mississippi Canyon, approximately 45 nautical miles offshore of southeastern Louisiana.