Gulf Oil Spills Reported by Minerals Management Service MMS DATA UNIQUE ID Total Spilled Date NRC_ID Company Name 2377 1440 2000-01-19 BP Amoco Corporation Product(s) Spilled Area Block Water Depth Activity 1,440 bbl synthetic base oil in 2,400 bbl MC 822 6327 Exploration of 60%* SBM Platform Pipeline Weather Related Loss of Well Control Operation TRUE Drilling Facility Cause of Incident Drillship TSF Discoverer Enterprise Human Error RISER DISCONNECT Remarks The rig's subsea engineer was function testing the blind shear rams. The weekly function test was performed from the remote blowout preventer (BOP) panel in the offshore installation manager's office. Instead of testing the blind shear rams, the engineer inadvertently pushed the LMRP button on the panel which unintentionally activated and disconnected the lower marine riser package (LMRP). The control panel buttons for the lower marine riser package (LMRP) did not have enough security to prevent activating the wrong function. It was determined that 2,400 barrels of 60%** synthetic-based drilling mud (SBM) leaked into the Gulf of Mexico. It is estimated that the lost SBM contained approximately 1,440 barrels of synthetic base oil. Example NRC Data SEQNOS MMS_IDS RESPONSIBLE_COMPANY INCIDENT_DATE MEDIA_INTEREST MEDIUM_DESC OFFSHORE TYPE_OF_INCIDENT INCIDENT_CAUSE WATERBODY INCIDENT_LOCATION LOCATION_ADDRESS LOCATION_STREET1 LOCATION_STATE AMOUNT_OF_MATERIAL UNITS_OF_MEASURE NAME_OF_MATERIAL ADDITIONAL_MEDIUM_INFO DESCRIPTION_OF_INCIDENT DESC_REMEDIAL_ACTION ADDITIONAL_INFO Monday, July 26, 2010 Page 1 of 37 MMS DATA UNIQUE ID Total Spilled Date NRC_ID Company Name 2609 1421 2003-05-21 645559 BP Exploration & Production, Inc. Product(s) Spilled Area Block Water Depth Activity 1,421 bbl synthetic base oil in 2,450 bbl MC 822 6040 Development/ Production of 58% SBM Platform Pipeline Weather Related Loss of Well Control Operation TRUE Drilling Facility Cause of Incident Drillship TSF Discoverer Enterprise Weather, External Forces, Equipment Failure RISER DISCONNECT Remarks The spill occurred at Mississippi Canyon (MC) 778, latitude 28.19 degrees N. and longitude 88.49 degrees W. It occurred as the Discoverer Enterprise was pulling out of the wellhole with bottom location at MC 822. At the time of the incident, conditions were 2-3 ft seas with a 1.9 knot current. The drilling vessel was in the process of pulling of of the hole when it experienced wave action heaving and jarring. The riser parted in two places at approximately 3,200 ft an 5,087 ft. water depths. There was a release of 2,450 barrels of 58% Accolade synthetic-based drilling mud (SBM). It is estimated that the lost SBM contained approximately 1,421 barrels of Accolade synthetic base oil . Example NRC Data SEQNOS MMS_IDS RESPONSIBLE_COMPANY 645559 2609 BP INCIDENT_DATE MEDIA_INTEREST MEDIUM_DESC 5/21/2003 NONE WATER OFFSHORE TYPE_OF_INCIDENT INCIDENT_CAUSE WATERBODY N PLATFORM EQUIPMENT FAILURE GULF OF MEXICO INCIDENT_LOCATION LOCATION_ADDRESS LOCATION_STREET1 PLATFORM INCIDENT MISSISSIPPI CANYON LOCATION_STATE AMOUNT_OF_MATERIAL UNITS_OF_MEASURE LA 0 UNKNOWN AMOUNT NAME_OF_MATERIAL ADDITIONAL_MEDIUM_INFO SYNTHETIC DRILLING FLUID GULF OF MEXICO DESCRIPTION_OF_INCIDENT ////DRILL///SHIP ENTERPRISE WAS ON LOCATION IN MISSISSIPPI CANYON WHEN A RISER PARTED AT 3000 FT. THE RAMS ACTIVATED CUTTING THE PIPE BUT RELEASED SYNTHETIC BASED DRILLING FLUID. DESC_REMEDIAL_ACTION INVESTIGATION UNDERWAY ADDITIONAL_INFO CALLER WILL NOTIFY: USCG, MMS. Monday, July 26, 2010 Page 2 of 37 MMS DATA UNIQUE ID Total Spilled Date NRC_ID Company Name 2835 960 2005-08-29 805794 BP Exploration & Production, Inc. Product(s) Spilled Area Block Water Depth Activity crude oil MC 109 1100 Development/ Production Platform Pipeline Weather Related Loss of Well Control Operation TRUE Hurricane Katrina Hurricane Facility Cause of Incident Platform A-Amberjack (fixed) 8" Seg Weather, External Forces, Hurricane Katrina #9347 (DOI) Remarks The 5,800 foot long 8-inch oil pipeline segment #9347(a DOI-regulated pipeline) associated with the Amberjack platform at MC 109 was discovered severed on 7/27/2006. The damage was determined to have occurred during Hurricane Katrina. The pipeline was shut in prior to the storm and the subsea safety valve held which limited oil loss to that contained in the damaged segment. The pipeline has been plugged and abandoned. The initial estimate of crude oil lost from the pipeline was 100 to 2,000 bbl. After further investigation, it was determined that the loss was actually between 600 and 960 bbl. MMS assumes 960 bbl in spill calculations. Example NRC Data SEQNOS MMS_IDS RESPONSIBLE_COMPANY 805794 2835 BP INCIDENT_DATE MEDIA_INTEREST MEDIUM_DESC 8/29/2005 NONE WATER OFFSHORE TYPE_OF_INCIDENT INCIDENT_CAUSE WATERBODY Y PIPELINE NATURAL PHENOMENON GULF OF MEXICO INCIDENT_LOCATION LOCATION_ADDRESS LOCATION_STREET1 OFFSHORE PIPELINE LOCATED IN SOUTH PASS 50 LOCATION_STATE AMOUNT_OF_MATERIAL UNITS_OF_MEASURE LA 2000 BARREL(S) NAME_OF_MATERIAL ADDITIONAL_MEDIUM_INFO OIL: CRUDE GULF OF MEXICO DESCRIPTION_OF_INCIDENT PIPELINE DAMAGE DUE TO HURRICANE EVENTS OF LAST YEAR. WHILE CONTINUING WITH REPAIRS TODAY TO DAMAGE INCURRED BY THE HURRICANES OF 2005, THIS PIPELINE WAS DISCOVERED TO BE SEVERED. THERE HAS BEEN NO VISIBLE EVIDENCE OF A CRUDE OIL RELEASE, NO SHEEN OR SLICK BUT, IT HAS BEEN DETERMINED THAT SINCE THE HURRICANE EVENTS OF 2005 THERE WS A CONTINUOUS RELEASE INVOLVING 100- 2000 BARRELS OF CRUDE OIL. DESC_REMEDIAL_ACTION NO SURFACE EVIDENCE OF THE RELEASE WAS EVER SEEN. ADDITIONAL_INFO WHILE CONTINUING WITH REPAIRS TO DAMAGE INCURRED BY THE HURRICANES OF 2005, THIS PIPELINE WAS DISCOVERED TO BE SEVERED. ALTHOUGH THERE HAS NEVER BEEN ANY WATER SURFACE VISIBLE EVIDENCE OF A CRUDE OIL RELEASE, AS PART OF OUR REPAIR EFFORTS TODAY (JULY 27, 2006) WE HAVE DETERMINED THAT MORE LIKELY THAN NOT THERE WAS A RELEASE FROM THIS PIPELINE DURING THE HURRICANE EVENTS OF 2005. Monday, July 26, 2010 Page 3 of 37 MMS DATA UNIQUE ID Total Spilled Date NRC_ID Company Name 2617 944 2003-06-30 649475 BP Exploration & Production Inc. Product(s) Spilled Area Block Water Depth Activity 944 bbl synthetic base oil in 1,817 bbl MC 725 4400 Exploration of 52% SBM Platform Pipeline Weather Related Loss of Well Control Operation TRUE Drilling Facility Cause of Incident Semisub Rig TSF Deepwater Horizon Weather, External Forces, Human Error, Equipment Failure RISER DISCONNECT Remarks An emergency riser disconnect occurred when drilling vessel failed to maintain station keeping against 44 knot winds, 3.8-4.0 knot loop current, and 12-14' sea conditions. The vessel used all eight thrusters at 100% power but still moved 108 ft. off center and was unable to maintain position. When the rig had drifted about 35 meters (108 ft) off center, it was forced to perform an emergency disconnect of its riser. This caused a maximum of 1,817 barrels of 14.9 pounds per gallon 52% Novaplus synthetic-based drilling mud (SBM) to be released into offshore waters. The Captain had given orders to keep the current on the beam rather than follow the recommendation of the DP model System Selected Heading (SSH) that would have taken the current approximately on the bow of the Horizon. The decision to maintain the current on the beam and and not consider a different heading until too late contributed to the situation. Also, the rig lacked sufficient power to overcome the forces of nature. Fifty-two percent (52%) of the drilling mud consisted of Ester IO #1618 (Internal Olefin C15 to C18) - the synthetic oil portion of Nova Plus SBM. It is estimated that the lost SBM contained approximately 944 barrels of Nova Plus synthetic base oil. Example NRC Data SEQNOS MMS_IDS RESPONSIBLE_COMPANY 649475 2617 BP INCIDENT_DATE MEDIA_INTEREST MEDIUM_DESC 6/30/2003 NONE WATER OFFSHORE TYPE_OF_INCIDENT INCIDENT_CAUSE WATERBODY Y VESSEL NATURAL PHENOMENON GULF OF MEXICO INCIDENT_LOCATION LOCATION_ADDRESS LOCATION_STREET1 MISSISSIPPI CANYON / BLOCK 725 LOCATION_STATE AMOUNT_OF_MATERIAL UNITS_OF_MEASURE LA 1400 BARREL(S) NAME_OF_MATERIAL ADDITIONAL_MEDIUM_INFO SYNTHETIC BASE DRILLING FLUID GULF OF MEXICO DESCRIPTION_OF_INCIDENT THE CALLER STATED THAT DUE TO A TROPICAL STORM, AN EMERGENCY DISCONNECT OF A RISER FROM A SEA FLOOR, THE CONTENTS FROM THE RISER DISCHARGED. DESC_REMEDIAL_ACTION SECURED THE RISER SYSTEM AND THE WELL / REMOVED OFF LOCATION ADDITIONAL_INFO THE CALLER STATED THAT THE MATERIAL TRAVELLED DOWN TO THE DEPTH OF 4,400FT. IN THE WATER. Monday, July 26, 2010 Page 4 of 37 MMS DATA UNIQUE ID Total Spilled Date NRC_ID Company Name 2976 870 2006-12-24 821942 BP Pipelines (North America) Inc. Product(s) Spilled Area Block Water Depth Activity crude oil GA A005 126 Development/ Production Platform Pipeline Weather Related Loss of Well Control Operation TRUE Pipeline Facility Cause of Incident 14" Seg #4879 (DOT) External Forces, Human Error, Equipment Failure Remarks The 300,064 foot long 14-inch oil pipeline segment #4879 (a DOT-regulated pipeline) is part of the main pipeline of the High Island Pipeline System (HIS). It is a DOT-authorized pipeline which goes from Galveston 214 to High Island A474. This investigation is a panel investigation estimated to be completed in March 2008. Initial determinations suggest the cause of the pipeline break was impact from a vessel anchor which severed the pipeline. Preliminary spill volume is 870 bbl of light sweet crude oil. ( This information is subject to change pending completion of the panel investigation.) Example NRC Data SEQNOS MMS_IDS RESPONSIBLE_COMPANY