A Joint Investigation Team (JIT) last year conducted numerous hearings and compiled evidence. BOEMRE and USCG are expected to release a final joint report by late July. Transocean said, "The errors in the draft report concern four fundamental issues—sources of ignition, maintenance of the blowout preventer (BOP), functioning of emergency shutdown systems, and functioning of alarms." The drilling contractor released a 110-page response dated June 8 that it sent to the US Department of Homeland Security and the Department of the Interior regarding the USCG draft report. Transocean acknowledged the accident provided "lessons to be learned" by operators and drilling rig crews. "Unfortunately, with conclusions and findings that are at odds with the evidence in the record, the draft report runs the risk of undermining the Coast Guard's credibility on a very important part of its marine safety mission," Transocean said.