The San Francisco Chronicle and Fuel Fix report that BP, Transocean Ltd. and Halliburton may face additional government citations for safety and environmental violations connected to the Deepwater Horizon explosion.

The three companies have already received citations for their role in the April 2010 Deepwater Horizon blast and resulting Gulf oil spill. In October 2011, federal regulators charged BP with seven violations, and Transocean and Halliburton each with four violations. The original citations were based on a joint investigation by the Interior Department and the United States Coast Guard, while the upcoming citations will be based on government review of “underlying materials that were not specifically addressed (in the joint investigation report).”

Michael Bromwich, head of the Bureau of Safety and Environmental Enforcement, says that the notices of violation will likely be sent out within two weeks.

Tags: BP, Deepwater Horizon, environment, Halliburton, Transocean