Division of Spill Prevention and Response

Breadcrumbs

Unified Command

Whenever there is an incident involving more than one agency with jurisdiction, a joint command arrangement, called the Unified Command, is implemented. The Unified Command for the Repsol Q2 Pad Gas and Mud Release consists of the U.S. Environmental Protection Agency, the Alaska Department of Environmental Conservation, Repsol E&P USA, and the North Slope Borough.

 

Latest Photos
Photo Date: April 3, 2012   View all photos>>
Wrangell camp being moved off Q2 ice pad. Photo date 4/3/2012 Panorama from Grid Stn 2411. Photo date 4/3/2012 Geo-referencing a high spot in the tundra nicked during the cleanup. Photo date 4/3/2012 Crew marking locations of Confirmation Sampling stations. Photo date 4/3/2012
Wrangell camp being moved off Q2 ice pad. Photo date 4/3/2012 Panorama from Grid Stn 2411. Photo date 4/3/2012 Geo-referencing a high spot in the tundra nicked during the cleanup. Photo date 4/3/2012 Crew marking locations of Confirmation Sampling stations. Photo date 4/3/2012

View all photos>>
Incident Description
mapRepsol contractor Nabors Drilling was drilling an exploratory well when the drill penetrated a shallow gas pocket at a depth of 2,523 feet, resulting in a gas kick. The gas kick drove drilling mud out of the well and through the gas diverter onto the ice pad and adjacent snow-covered tundra. The gas diverter is a pipe that extends approximately 75 feet from the drilling rig toward the south edge of the pad. Additional mud was pumped into the well in an attempt to control it, but that mud was also forced out by the gas.
Incident Update

April 10, 2012 (final update) -- Spill responders from Alaska Clean Seas (ACS), Penco and CCI used heavy equipment, such as loaders, excavators, trimmers, skid-steers, hydraulic hammers and snow machines with trailers, to remove the spill material from the heaviest contaminated zones. Hand tools were used to recover drilling mud from the areas of lightest contamination. Cleanup crews removed approximately 6,286 cubic yards of spilled material from the snow-covered tundra. In addition, 2,402 cubic yards of down-hole material and 116,928 gallons of water-based mud and freshwater from the steam units were recovered from the drilling pad during the initial response.

Repsol hired a surveying contractor to assist in calculating the off-pad impacted area and the volume of the material released to the tundra. The contractor estimated that 21,114 bbls of down-hole material were released to the tundra during the initial blow-out. In addition, they calculated the total impacted area as 23.75 acres. An area of 16.76 acres of lightly-misted material was determined to be unrecoverable, and no cleanup occurred in this zone.

On April 1, 2012, a group from the Kuukpikmiut Subsistence Oversight Panel, Inc. (KSOP) and from the village of Nuiqsut visited the site to see how the cleanup had progressed. The group was satisfied with the work that had been done and said that they did not believe that any further cleanup needed to be performed.

On April 5, 2012, the final site inspection team, composed of representatives from the North Slope Borough, KSOP, ADEC, ADNR and Repsol, made the final site inspection. The team agreed that no further cleanup actions were required.

ADEC's field monitors were demobilized from the site on April 6, 2012.

>>Full Chronology
>>Final Situation Report

 

Situation Reports
04/10/2012 1300 (PDF 856K) -- FINAL
03/18/2012 1530 (PDF 286K)
03/16/2012 1530 (PDF 282K)
03/13/2012 1530 (PDF 273K)
03/06/2012 1530 (PDF 480K)
03/03/2012 1530 (PDF 489K)
03/02/2012 1530 (PDF 504K)
03/01/2012 1530 (PDF 650K)
02/29/2011 1530 (PDF 335K)
02/28/2011 1530 (PDF 645K)
02/27/2012 1530 (PDF 715K)
02/26/2012 1500 (PDF 789K)
02/25/2012 1500 (PDF 713K)
02/24/2012 1600 (PDF 253K)
02/23/2012 1600 (PDF 947K)
02/22/2012 1600 (PDF 670K)
02/21/2012 1500 (PDF 188K)
02/20/2012 1400 (PDF 228K)
02/19/2012 1400 (PDF 228K)
02/18/2012 1400 (PDF 345K)
02/17/2012 1500 (PDF 318K)
02/16/2012 1400 (PDF 224K)
02/15/2012 1930 (PDF 225K)
02/15/2012 1600 (PDF 657K)
   
Fact Sheets
 
Media Advisories / Press Releases
 
Response Plans, Maps and Related Information
Plans
  Alaska Federal and State Preparedness Plan for Response to Oil and Hazardous Substance Discharges and Releases
  North Slope Subarea Contingency Plan for Oil and Hazardous Substance Discharges/Releases
  Alaska Incident Management System (AIMS) Guide
  Geographic Response Strategies (GRS) for the North Slope
  Most Environmentally Sensitive Areas (MESA) for Colville River Delta
 

Environmental Sensitivity Index (ESI) Maps

Maps
  click thumbnail for larger view
 
   
Technical Information Weather
Oil Cleanup on Tundra
  Tundra Treatment Manual. Literature review and tundra cleanup guidelines.
Alaska Clean Seas (ACS) Technical Manual -- Tactics Descriptions
NWS Public Weather Forecasts
  North Slope (Central Beaufort Sea Coast including Nuiqsut, Prudhoe Bay, Alpine, Deadhorse, Kuparuk)
For More Information
Ty Keltner, Public Information Officer, ADEC (907) 465-5009
Links