The federal Bureau of Safety and Environmental Enforcement...issued a second set of regulatory violations arising from the operation of the Macondo well, which is the Gulf of Mexico well that was being drilled by the Deepwater Horizon when an explosion in April 2010 killed 11 workers. The blast caused the drilling rig to sink and triggered a major oil spill. BSEE...said it sent five Incidents of Non-Compliance by faxed letter to BP. One INC lists a violation...saying BP failed to conduct an accurate pressure integrity test at the 13 5/8-inch liner shoe. The other four were violations...for failing to suspend drilling operations at the Macondo well when the safe drilling margin identified in the approved application for permit to drill was not maintained. "Further review of the evidence demonstrated additional regulatory violations by BP in its drilling and abandonment operations at the Macondo well. Our federal regulations exist to ensure safe and environmentally responsible activities. We will continue to be vigilant in enforcing those regulations," said BSEE Director James Watson