Significant Pollution Incidents

Pollution:	58 bbl Crude Oil	Operation:	Production
Rig: Platform:	Sunken Oil Barge (SOB) Platform	Lease:	N/A
Area: Block:	Ship Shoal 114	Cause:	Equipment Failure & Human Error: SOB & disregarded SOP
Distance to Shore:	13 Miles	Water Depth:	54 Feet
Other Events:	Fire

Remarks: The submerged oil barge (SOB) platform tipped over on its side at about a 60 degree angle causing an explosion and fire. The SOB remained capsized for 18 days. The accident resulted in two minor injuries. Inaccurate gauging of oil in the storage tanks caused a reduction in total ballast. Response: workboated pumped water on the fire; 45 bbl recovered by Fast Response Units. Spillage estimated at 55-58 bbl; the SOB platform was righted on February 19, 1981.

Pollution:	210 bbl Mineral Oil	Operation:	Drilling
Rig: Platform:	Rig Nicklos #30 Platform B	Lease:	G02353
Area: Block:	High Island 110	Cause:	Equipment Failure: tank ruptured
Distance to Shore:	19 Miles	Water Depth:	49 Feet

Pollution:	80 bbl Crude Oil	Operation:	Pipeline
Rig/Platform:	Platform E	Lease:	N/A
Area: Block:	Ship Shoal 118	Cause:	Leak: external corrosion and/or metal fatigue
Distance to Shore:	16 Miles	Water Depth:	54 Feet
Pipeline Segment:	05480	Pipeline Diameter:	4 Inches

Remarks: The 4" submerged pipeline from E platform to submerged oil barge (SOB) header ruptured 550' from platform. Estimated spillage 80-100 bbl, caused by external corrosion and/or metal fatigue. Response: replaced 100' section of pipe.

Pollution:	50 bbl Diesel	Operation:	Drilling & Motor Vessel
Rig: Platform:	Rig Zapata Concord (semisub) Well 1	Lease:	G04498
Area: Block:	Viosca Knoll 864	Cause:	Equipment Failure: transfer hose
Distance to Shore:	16 Miles	Water Depth:	350 Feet
Other Events:	Vessel Mishap

Remarks: EXPLORATION SPILL. While offloading diesel fuel from the M/V "Gulf Fleet No. 38, the section of fuel hose underwater burst and diesel was pumped into the Gulf until a slick was noticed. Response: the hose was replaced.

Pollution:	64 bbl Crude Oil	Operation:	Completion or Workover
Rig: Platform:	Rig Marlin 10 Platform A, Well A-8	Lease:	G02445
Area: Block:	Viosca Knoll 900	Cause:	Not Identified
Distance to Shore:	21 Miles	Water Depth:	340 Feet
Other Events:	Loss of Well Control

Remarks: Blowout, gas, oil. While attempting to go into the hole, bridge was hit at 7,651'. Kick occurred while removing pipe. Response: the blowout preventors were activated; closed pipe rams, could could not install safety valve, the force of the escaping fluids and gas were too great; the platform was shut in and evacuated; and pumped down annulus, installed a full opening safety valve.

Pollution:	5,100 bbl Crude Oil	Operation:	Pipeline & Motor Vessel
Rig/Platform:	Platform A	Lease:	G01608
Area: Block:	South Pass 60	Cause:	External Damage: anchor
Distance to Shore:	4 Miles	Water Depth:	190 Feet
Pipeline Segment:	04715	Pipeline Diameter:	8 Inches
Other Events:	Vessel Mishap

Remarks: Service vessel, M/V "Ocean Dolphin"'s anchor caught on an obstruction on Friday night. Attempts to dislodge anchor failed and the anchor chain had to be cut. The next morning, a slick was observed. It was determined to be the submerged 8" oil pipeline from ARCO's SP60 "A" structure to Shell's SP70 "C" platform. Response: replaced riser and 80' section of pipe. Estimated spillage 5,000 - 5,141 bbl.