March 20, 2006 – BP Exploration & Production, Inc. (Operator) &
Diamond Offshore Drilling, Inc. (Contractor)

Remarks: Sea Conditions: Winds 36 mph, Current 3 mph, 12 foot seas. At 2100 hours on 19-March-2006, while conducting drilling operations on Well No. 1 in Walker Ridge 544, the dynamically positioned Diamond Ocean Confidence semi-submersible drilling rig began experiencing high environmental loads due to the approaching western edge of an Eddy (over 2 knots) and approaching weather system (~30 knot winds). The Offshore Installation Manager (OIM) called for a Yellow Alert following company station keeping guidelines and preparations began for a possible riser disconnect. A Red Alert was initiated at 0649 hours when the total power consumption for the Dynamic Positioning (DP) system consistently exceeded 80% due to the high winds and current. At 0730 hours, environmental conditions caused the total power consumption to exceed 85%. The pipe in the BOP was manually sheared and the pipe in the riser was pulled clear of the Blow Out Preventer (BOP). Once the drill pipe was cut, the SBM inside the drill pipe was circulated into the riser in an attempt to recover this fluid. Weather conditions began to improve so the OIM had the rig crew stand by, secure from Red Alert and remain in Yellow Alert. At 0817 hours engine #7 developed a fuel leak and was taken out of service for repair. With the engine #7 off line, the total power consumption rose to over 80% again, the OIM again ordered a Red Alert to be initiated. During the displacement of the SBM in the riser from the cut drill string, an Emergency Disconnect Sequence (EDS) from the BOP was performed at 0822 hours. Approximately 218 bbls of 13.4 ppg 69% synthetic-based mud (SBM) were lost to the Gulf of Mexico. It is estimated that the lost SBM contained approximately 150 barrels of synthetic base oil.

Accident Investigation Report: Form 2010 20-Mar-2006 WR544

NRC Report: 791414

May 8, 2006 – Schlumberger

Remarks: The lease operator for G08735 where the fixed 4-pile Platform A in West Delta 106 is located is Walter Oil & Gas. The offshore supply vessel (OSV) experienced a release of 450 gallons (10.7 bbl) of hydrochloric acid and 2,602 gallons (62 bbl) of caustic cleaner due to equipment failure. It is not clear whether the OSV was servicing the lease, or whether it was just navigating through the lease area at the time of the release.

NRC Report: 796532

May 9, 2006 – BP Exploration & Production, Inc. (Operator) &
Diamond Offshore Drilling, Inc. (Contractor)

Remarks: On the Diamond Ocean Confidence semi-submersible drilling rig, a circulation pump was being used to a transfer Synthetic Based Mud (SBM) from one tank to another for future operational needs. The rig’s normal mud circulation pump was used to transfer these fluids. During the transfer rig personnel noticed that the receiving tank was not rising while the pump was running. The pump was stopped after running approximately 9 minutes. It was found that a valve had been left open. To transfer the synthetic base mud from pit to pit a valve needs to be opened on the line that connects both pits together. By error, personnel opened the valve to the saltwater wash pit, which discharges overboard. Approximately 213 bbls of 50% synthetic-based mud (SBM) were pumped from the mud pit tank into the Gulf of Mexico during this operation. It is estimated that the lost SBM contained approximately 107 barrels of synthetic base oil.

Accident Investigation Report: Form 2010 09-May-2006 WR544

NRC Report: 796561

August 15, 2006 – BP Exploration & Production, Inc. (Operator) &
Transocean Offshore (Contractor)

Remarks: Sea Conditions: Wind SE at 10 mph, Current E at 2mph, 2 foot seas. Early morning on August 15, 2005 on the Transocean Discoverer Enterprise drillship, the RC1 reserve pit was filled with water and the water was subsequently pumped overboard through the transfer (overboard) line from which a blank had been removed and a static sheen test was completed. The task was completed and a Permit to Work was completed. The blank on the overboard line was not replaced. After tour change, the rig floor was in the process of performing a negative test on the well. Pit volumes where attained and walk through was held. The plan was to have Dowell pump water down the drill string taking returns up the backside with calcium bromide, over the shakers and into pit P4. Displacement was started and returns where monitored in P4. The assistant driller was monitoring P4 and Dowell to make sure we where getting a bbl in and a bbl out. A total of 120 bbls had been pumped with no problems. The derrick hand then called and stated he was going to start filtering fluid out of P4 into P2 and P5. The assistant driller agreed and the process was started.

The derrickman checked his line up in the mix pump room and the pit room and then lined up a centrifugal pump on P4 to supply fluid to the filter presses. He lined up his discharge from the filter press back to the transfer line which was routed to P2 and P5 active pits and started filtering fluid. With the blank out and valves open in process pump room fluid was being pumped to P2, P5 and overboard. When the mud engineers strapped the mud pits and calculated their volumes at 2359, August 15, 2006, they could not account for 294 bbls of calcium bromide. Therefore it is presumed 294 bbl of calcium bromide were pumped out of the pits, through the overboard line and into the Gulf of Mexico.

Accident Investigation Report: Form 2010 15-Aug-2006 MC776

NRC Report: NONE

November 4, 2006 – BP Exploration & Production, Inc. &
Diamond Offshore Drilling, Inc. (Contractor)

Remarks: On the Diamond Ocean Confidence semi-submersible drilling rig, while drill crew was reverse circulating after a cement job, mud losses were noticed. Valve alignment was checked in the shaker house and one valve was found to be partially open on shunt line for mud pits allowing 127 bbls of Synthetic Oil Base Mud (SOBM) to go overboard of which 55% or 70 bbls was oil base.

Standard Procedure had been reviewed prior to the cement job, but the possibility of "reversing out" was not anticipated in the procedures. The shaker hand had been in that position for 18 months but crewman thought he had closed the butterfly valve completely.
 Rough seas impaired the meter reading levels resulting in slow response time in recognizing losses to active system. The valve had not been previously identified on the "OBM Overboard Discharge" list. The reverse out line is used so infrequently it had been overlooked.

Accident Investigation Report: Form 2010 4-Nov-2006 MC566

NRC Report: 817119

November 5, 2006 – BP Exploration & Production, Inc. (Operator) &
Transocean Offshore (Contractor)

Remarks: Sea Conditions: Winds SE at 24 mph, Currents NE at 1 mph, 9 foot seas. At 0656 hours on November 5, 2006 on the drillship Transocean Discoverer Enterprise, maintenance personnel near the port aft high voltage switch gear room heard an abnormal noise/buzzing with light smoke in the space. During their investigation of the space, they heard a louder pop and found the port harmonic filter had blown its three fuses, and a dead short between phases at the port harmonic filter fuses occurred, causing an upset on the 11KV power bus. The fuse material caused a small fire due to the fuse slag near the base of the unit. A portable CO2 fire extinguisher was used to extinguish the flame. Emergency bus supply to essential services was interrupted when the circuit breakers that maintain this supply tripped. The cause of this is subject to further ongoing investigation. The essential services bus powers the main fuel pumps for the main generators and the 2 main generators connected to the bus where unable to deliver the required load of the thrusters that were in-service. A sequence of load shedding and under/over frequency events were initiated with the generators having a fuel rack setting of 100% but insufficient fuel being supplied to the engines. The generators eventually opened their breakers causing all 6 thrusters to drop offline. At 0659 hours the vessel reached the red watch circle and the emergency riser disconnect sequence was initiated. At 06:59:45 hours the separation of the LMRP was confirmed at a distance of 185 feet from location resulting in the release of 547 bbl of 70% synthetic base drilling mud (SBM). It is estimated that the lost SBM contained approximately 383 barrels of synthetic base oil. No visible sheen was reported at the surface.

Accident Investigation Report: Form 2010 15-Aug-2006 MC777

NRC Report: 817168

November 12, 2006 - L & M Botruc

Remarks: INCIDENT DID NOT OCCUR ON LEASE. The Botruc #20 work boat was en route to Samson Offshore Company’s G01141 lease at Vermilion 217 Platform E where the Rowan Anchorage jack-up Rig was drilling well #F002. A spill of synthetic-based mud (SBM) occurred in the vicinity of EC 147, well away from the lease that Samson Offshore Company's drilling activities in VR 217. The spill occurred due to a valve that had been left open after an operation to stir the tanks. The work boat spilled 243 bbl of 67% Olefin SBM containing approximately 162.8 bbl of Olefin synthetic base fluid.

NRC Report: 817920

December 24, 2006 – BP Pipelines (North America) Inc.

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.)

Panel Investigation Report: Pending

NRC Report: 821942

January to December, 2006 – Pioneer Natural Resources USA, Inc.

Remarks: The East Cameron 322A 8-pile fixed platform was destroyed by Hurricane Rita. The platform was shut in prior to the storm and the subsea safety valves held which limited oil losses to that which was stored on the structure. At the time of the hurricane, there was approximately 659.4 bbl of petroleum and 65.6 bbl of chemicals on board. All 725 bbl has been assumed to have been lost (some of which may have actually been recovered). The platform has since been a source of chronic or intermittent leaks through Spring 2007. Pioneer is monitoring the platform and filing daily reports with MMS. The operator reported approximately 53.4 bbl lost in chronic land intermittent leaks from October through December 2005. The 725 bbl lost at the time of the hurricane, plus 53.4 bbl of chronic pollution in the fourth quarter of 2005 total to 778.4 bbl in 2005 and are reported in two separate entries in the 2005 Hurricane Rita Narratives for spills > 50 barrels.

Throughout 2006, there was an additional loss of approximately 142.8 bbl of crude oil in intermittent releases. Pioneer had begun the process of clearing debris and plugging abandoning the wells. The 142.8 bbl in 2006 was distributed: 14.6 bbl January-March, 41.1 bbl April-June, 35.6 bbl July-September, 51.5 bbl October-December. This 142.8 bbl is identified in the 2006 Narratives for spills > 50 barrels in the Gulf of Mexico.

An additional 52.9 bbl was reported in 2007. The 52.9 bbl were distributed: 16.9 bbl January-March, 30.4 bbl April-June, 4.7 bbl July-September, 1.0 bbl October-December.

Seepage was accounted by calendar quarters where any quarter for which seepage accumulated to at least one barrel has been included as a spill.

The initial loss during the hurricane was 725 bbl. Subsequent seepage from October 2005 through June 15, 2008 was 249.1 bbl. This was counted as three spills of 50 bbl or more: 725 bbl during the hurricane, 53.4 bbl in 4th Quarter 2005, 51.5 bbl in 4th Quarter 2006.

* includes chronic seepage totaling to at least on barrel in a calendar quarter.
** includes 65.62 bbl of chemicals lost during Hurricane Rita

Hurricane NRC Reports: 773825 & 773940

4th Quarter 2005 NRC Report: 779118

4th Quarter 2006 NRC Report: 810770

January to December, 2006 – Chevron U.S.A. Inc.

Remarks: The Eugene Island 313B 8-pile fixed platform was downed on September 24, 2005 by Hurricane Rita. Approximately 8.3 bbl in seepage between October and December 2005 are accounted for in the table below, but are not included in the 2006 spill volume estimate above.

Small sheens persisted until May 22, 2006 when there was a dramatic increase in sheens until the primary source, well B-20, was successfully cemented in by early July 2006. Pollution domes were used to minimize or contain seepage from damaged structures until repairs or decommissioning can be performed. However, it is difficult to contain such releases during decommissioning activities as the structures are cut up and dismantled. Small sheens were then August through November 2006 when the sheens stopped permanently.

Seepage was accounted by calendar quarters where any quarter for which seepage accumulated to at least one barrel has been included as a spill. Consequently, the 2006 spillage is counted as 3 spills of 50 bbl and greater rather than one 725 bbl spill as 1st, 2nd, and 3rd Quarters were 62.5 bbl, 528.3 bbl and 134.2 bbl.

Seepage was accounted by calendar quarters where any quarter for which seepage accumulated to at least one barrel has been included as a spill.

There was no recorded loss during the hurricane.. Subsequent seepage from October 2005 through June 15, 2008 was 733.3 bbl. This was counted as three spills of 50 bbl or more during 2006: 62.5 bbl in the 1st Quarter, 528.3 bbl in the 2nd Quarter, and 134.2 bbl in the 3rd Quarter 2006.

* includes chronic seepage totaling to at least on barrel in a calendar quarter.
** includes 1.2 bbl of chemicals lost during Hurricane Rita

The May 22nd NRC Report #797997 to the National Response Center is linked below. Other related NRC reports throughout 2006 were 787935, 801412, 808845, 808996, 809109, 809236, 809330, 809425, 809553, 809758, 809847, 809970, 810083, 810151, 810233, 810324, 810466, 810602, 810712, 810852, 810942, 811067, 811153, 811316, 812452, 812644, 812972, 813223, 814079, 816430, 816794 can be viewed at the same NRC website.

NRC Report: 797997

January thru March, 2006 – Forest Oil Corporation

Remarks: The Eugene Island 314F 4-pile fixed platform was destroyed by Hurricane Rita. The platform was shut in prior to the storm and the subsea safety valves held which limited oil losses. No spillage was reported during the hurricane.

Approximately 165.6 bbl seepage was observed in the 4th quarter of 2005 (October to December 2005) which is included in the 2005 pollution incidents of 50 bbl or more.

This additional 50.6 bbl of seepage was reported over the first quarter of 2006 between January and March.

2005 NRC Report: 776318

2006 NRC Report: 787130

January to December, 2006 – BP Exploration & Production, Inc.

Remarks: The Grand Isle 47C 8-pile fixed platform is one of the seven BP operated platforms downed in Federal waters by Hurricane Katrina. As part of BP's initial hurricane response, over-flights were conducted as early as September 6, 2005. In addition, an ROV vehicle was mobilized for inspection of all of BP's downed platforms on October 20, 2005. Platform will be dismantled by the end of 2007, and well(s) will be abandoned by the end of 2008. A response vessel and crew was assigned 24/7 to the Grand Isle 40-47field which has remained in action since January 2006.

195 bbl of hydrocarbons from the platform topsides were assumed to have been lost during Hurricane Katrina (some of which may have actually been recovered). It is assumed all topside losses were crude oil (some may have been refined products). An additional 18.6 bbl in intermittent releases were reported September through December 2005. This 213.6 bbl is reported in the 2005 spill volumes.

Throughout 2006, there was an additional loss of approximately 110.6 bbl of crude oil in relatively small intermittent releases (including releases of less than one barrel which are reported in the 2006 spill volumes. However, only one quarter had seepage of 50 bbl or more so rather than a 110.62 bbl spill in 2006, this is counted as four spills of 7.2, 25.8, 59, and 18.6 bbl for the 1st, 2nd, 3rd and 4th Quarters respectively.

An additional 21.8 bbl of intermittent seepage was observed in 2007. In the first quarter of 2008, approximately 48.2 bbl seepage was observed by early March.

Beginning May 21, 2006, the frequency and magnitude of the releases increased and BP, in consultation with the USCG and MMS, developed and implemented additional response measures to monitor, contain and recover all hydrocarbon releases. Two response vessels were tasked to monitor, contain, and recover all hydrocarbon releases 24/7 specifically from Gl-47C. In mid-August 2006, over-flights observed two hydrocarbon releases totaling approximately 37.1 bbl (included in the 2006 spill volume). A much larger, fully staffed and trained Incident Management Team (IMT) was activated as a precautionary measure on August 16, 2006 in response to the increasing frequency and magnitude of hydrocarbon r