As a result of a multimedia inspection by the United States Environmental Protection Agency (EPA), EES Coke — the Michigan coke battery facility, a wholly-owned subsidiary of DTE Energy — received two Findings of Violation (FOVs) related to: failing to repeat benzene sampling of waste streams due to a process change and use of calibration gas inconsistent with the applicable regulation; and alleged deficiencies in its oil pollution prevention measures and spill prevention, control and countermeasures plan.