NATIONAL RESPONSE CENTER 1-800-424-8802 *** For Public Use *** Information released to a third party shall comply with any applicable federal and/or state Freedom of Information and Privacy Laws Incident Report # 720737 INCIDENT DESCRIPTION *Report taken at 22:25 on 04-MAY-04 Incident Type: PLATFORM Incident Cause: EQUIPMENT FAILURE Affected Area: GULF OF MEXICO The incident occurred on 04-MAY-04 at 19:55 local time. Affected Medium: WATER GULF OF MEXICO ____________________________________________________________________________ SUSPECTED RESPONSIBLE PARTY Organization: TRANSOCEAN HOUSTON, TX 77084 Type of Organization: PRIVATE ENTERPRISE ____________________________________________________________________________ INCIDENT LOCATION MISSISSIPPI CAYNON BLOCK 778 County: MISSISSIPPI CANYON State: LA Latitude: 28 Degrees 11' 1" N Longitude: 88 Degrees 29' 0" W PLATFORM INCIDENT ____________________________________________________________________________ RELEASED MATERIAL(S) CHRIS Code: NCC Official Material Name: NO CHRIS CODE Also Known As: SYNTHETIC BASED DRILLING MUD Qty Released: 50 BARREL(S) Qty in Water: 50 BARREL(S) ________________________________________________________________________ DESCRIPTION OF INCIDENT A LEAK OCCURRED IN A MUD BOOST LINE ON THE MARINE RISER RESULTING IN A RELEASE OF SYNTHETIC BASED DRILLING MUD. ____________________________________________________________________________ INCIDENT DETAILS Platform Rig Name: DISCOVERER ENTERPRISE Platform Letter: Location Area ID: MISSISSIPPI CANYON Location Block ID: 778 OCSG Number: OCSP Number: State Lease Number: Pier Dock Number: Berth Slip Number: ---WATER INFORMATION--- Body of Water: GULF OF MEXICO Tributary of: Nearest River Mile Marker: Water Supply Contaminated: NO ____________________________________________________________________________ DAMAGES Fire Involved: NO Fire Extinguished: UNKNOWN INJURIES: NO Hospitalized: Empl/Crew: Passenger: FATALITIES: NO Empl/Crew: Passenger: Occupant: EVACUATIONS: NO Who Evacuated: Radius/Area: Damages: NO Length of Direction of Closure Type Description of Closure Closure Closure Air: N Road: N Major Artery: N Waterway: N Track: N Passengers Transferred: UNKNOWN Environmental Impact: UNKNOWN Media Interest: NONE Community Impact due to Material: NO ____________________________________________________________________________ REMEDIAL ACTIONS NONE Release Secured: YES Release Rate: Estimated Release Duration: ____________________________________________________________________________ WEATHER Weather: CLEAR, ºF Wind speed: 8 KNTS ____________________________________________________________________________ ADDITIONAL AGENCIES NOTIFIED Federal: State/Local: State/Local On Scene: State Agency Number: ____________________________________________________________________________ NOTIFICATIONS BY NRC ATSDR LA ATTN: HSEES STAFF (PRIMARY) 04-MAY-04 22:32 FBI LOUISIANA ATTN: EKKO BARNHILL (PRIMARY) 04-MAY-04 22:32 LA DEPT OF ENV QUAL (PRIMARY) 04-MAY-04 22:32 LA OFFICE OF EMERGENCY PREPAREDNESS (PRIMARY) 04-MAY-04 22:32 LA OFFICE OF GOV ATTN ROLAND GUIDRY (PRIMARY) 04-MAY-04 22:32 LA OFFICE OF PUBLIC HEALTH (PRIMARY) 04-MAY-04 22:32 MAIL EPA R6 ATTN: SPILL REPORTS (PRIMARY) 04-MAY-04 22:32 MSO MORGAN CITY (PRIMARY) 04-MAY-04 22:32 NOAA 1ST CLASS BB RPTS FOR LA (PRIMARY) 04-MAY-04 22:32 LA STATE POLICE (PRIMARY) 04-MAY-04 22:32 ____________________________________________________________________________ ADDITIONAL INFORMATION NONE ___________________________________________________________________________ *** END INCIDENT REPORT # 720737 ***