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Significant Pollution Incidents - 1995
( > 50 barrels)
Date: | 25-JAN-1995 | Operator: | Mesa Operating Co. |
Investigation: | Complete | Activity: | Development |
Lease: | G06140 | Amount(bbl): | 600 - Condensate |
Area: | High Island | Operation: | Drilling |
Block: | 55 | Cause: | Human Error |
Rig/Platform: | A | Water Depth: | 50' |
Remarks: A workboat struck the platform causing
two condensate storage tanks on the platform to rupture.
Date: | 06-JUL-1995 | Operator: | Coastal Oil & Gas Corporation |
Investigation: | Complete | Activity: | Development |
Lease: | G07652 | Amount(bbl): | 75 - Condensate |
Area: | East Cameron | Operation: | Production |
Block: | 219 | Cause: | Equipment Failure |
Rig/Platform: | A | Water Depth: | 120' |
Remarks: The condensate surge vessel pump malfunctioned, which caused the surge vessel to fill and backup to the production separator when the surge vessel LSH failed. The production separator carried over condensate to the water skimmer. The LSH on the skimmer tripped but failed to initiate a platform shut in. The skimmer carried over sufficient condensate to the sump tank to disrupt the condensate/water interface and displace the water level with condensate. The sump tank LSH tripped but also failed to shut in the platform. Condensate then carried over the sump tank through the sump tank water leg and into the Gulf.
Date: | 03-OCT-1995 | Operator: | Meridian Oil Offshore, Inc. |
Investigation: | None | Activity: | Development |
Lease: | G14200 | Amount(bbl): | 89 - Diesel / Collision |
Area: | High Island | Operation: | Motor Vessel |
Block: | A 371 | Cause: | Weather |
Rig/Platform: | Rowan Gorilla IV | Water Depth: | 430' |
Remarks: A weather change caused the motor vessel
to drift into the port leg of the rig puncturing the boat's fuel saddle tank
spilling 89 barrels (3,722 gal) of diesel fuel into the Gulf. Due to rough
weather and sea conditions, no attempt was made by the boat company to recover
the spilled fuel. There was no damage to the drilling rig or the port leg, and
the boat returned safely to shore.
Date: | 15-DEC-1995 | Operator: | Chevron |
Investigation: | Complete | Activity: | Development |
Lease: | G03265 | Amount(bbl): | 435 - Condensate |
Area: | West Cameron | Operation: | Production |
Block: | 198 | Cause: | Equipment Failure |
Rig/Platform: | A | Water Depth: | 56' |
Remarks: A liquid hydrocarbon spill occurred offshore the State of Louisiana. A high-pressure separator was cleaned in an effort to reopen the separator's clogged water leg. Upon returning to the platform, the next day, the platform operator observed a spill and reported it to the MMS and the NRC. It was observed that liquid hydrocarbons were spilling from the platform's sump tank and that a ball valve on the drain line from the separator to the sump tank was not holding. The valve, which had been opened and closed during the previous day's cleaning of the separator, was removed, and the line was blind flanged. Meter readings and well tests were reviewed.