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Doyon Rig Oil-Based Mud Spill

Location
Kuparuk 2L Well 320
Time/Date of Incident
The incident occurred at 12:30 PM on January 9, 2011. The ConocoPhillips Alaska, Inc. (CPAI) reported the incident to ADEC at 2:02 PM on the same day.
Spill Number
11399900901
Product/Quantity
Doyon Drilling, Inc. (Doyon) staff estimated that approximately 45 barrels (1,890 gallons) of mineral oil based mud were released from a Doyon drill rig to snow-covered gravel pad, snow- covered tundra, the wind walls, and the secondary containment of the rig. Doyon staff estimated the volume based on the amount of make-up mud required to refill the bore hole.
Cause
The cause of the release is under investigation.

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