The following incidents in CIRCAC’s area of responsibility and concern have warranted monitoring and/or advice, recommendations, data and expertise.
Note: Throughout this incident, CIRCAC was in the Unified Command at CISPRI to monitor the response and provide advice, recommendations and resources.
HILCORP ALASKA LLC STATEMENT AND FINAL UNIFIED COMMAND NEWS RELEASE
Update on Anna Platform in Granite Point Field, Cook Inlet
ANCHORAGE, AK – April 3, 2017 – The Unified Command consisting of the U.S. Coast Guard (USCG), the Alaska Department of Environmental Conservation (ADEC) and Hilcorp Alaska (Hilcorp) stood down early this morning. All oil has been removed from the pipeline and there is no indication of any further release.
Based on standard calculations for the number and size of the initial oil sheens and the amount of oil recovered from the line, Hilcorp estimates the total volume of this spill to be less than three gallons of oil.
The sheen sighted and reported by Hilcorp personnel on April 1st has not been spotted in subsequent flyovers. Hilcorp will continue to conduct flyovers as weather permits.
Hilcorp immediately shut-in the platform and mobilized emergency response teams. These efforts have been supported by the Perseverance, a Cook Inlet Spill Prevention and Response (CISPRI) vessel.
The eight inch diameter pipeline is 1.62 miles in length and was acquired by Hilcorp in January of 2012. An inline inspection of the entire line was conducted in June of 2016 and visual inspections of certain exterior portions of the line were conducted in June of 2016. These inspections showed the line to be in good working condition.
Moving forward in our response efforts, a diving crew is assembling and appropriate support vessels are being readied. Use of divers to investigate and perform any necessary repairs will be initiated as soon as it is safe to do so.
There have been no observed impacts to wildlife.
At this time, the cause of the release is unknown. Further updates will be provided as new information becomes available.
April 3, 2017
UNIFIED COMMAND STANDS DOWN ITS RESPONSE TO ANNA PLATFORM INCIDENT
Nikiski, Alaska – The Unified Command comprised of the United States Coast Guard (USCG), Alaska Department of Environmental Conservation (ADEC), and Hilcorp Alaska (Hilcorp) responding to a reported sheen in Cook Inlet stood down this morning at 9am after a final overflight this morning confirmed no sheening.
Hilcorp crews successfully and safely evacuated all crude oil from the suspected leaking pipeline by displacing it with filtered seawater. The pipeline is an oil gathering line connecting the Anna and Bruce platforms. Cook Inlet Spill Prevention and Response (CISPRI) remained on scene and USCG and ADEC Observers were on board the Anna platform for the purging operation.
Overflights were conducted at 700pm Sunday evening and at 750am this morning. No sheen was observed. The Perseverance, a CISPRI vessel, remained on standby through the evening and will do a final survey of area later today.
A diving crew is assembling in the region accompanied by the appropriate support vessels. Use of divers to investigate and perform any necessary repairs will be initiated as soon as it is safe to do so.
At this time, the exact cause of the release is unknown and remains under investigation.
Media can reach the Unified Command Information office by contacting:
Lori Nelson Candice Bressler Coast Guard Public Affairs 907-777-8392 907-465-5009 907-209-8731 firstname.lastname@example.org email@example.com firstname.lastname@example.org
FOR IMMEDIATE RELEASE: April 2, 2017
UNIFIED COMMAND ESTABLISHED IN RESPONSE TO ANNA PLATFORM INCIDENT
Nikiski, Alaska – A Unified Command comprised of the United States Coast Guard (USCG), Alaska Department of Environmental Conservation (ADEC), and Hilcorp Alaska (Hilcorp) has been established in response to reports of a sheen near the Anna Platform.
The Anna Platform is located in the Granite Point Field of Cook Inlet. A sheen was discovered by Hilcorp personnel at 11:20am on Saturday, April 1. Production was shut in immediately and the incident was reported to ADEC at 12:05pm on the same day.
Three flyovers were conducted yesterday. During the first flyover at approximately 11:30am, several sheens were spotted approximately 3 miles downstream from the platform. The other two flights did not identify any sheen in the area. Two additional flyovers were completed today at 10:45am and 2pm. No sheen was sighted in the area.
The suspected source of the release is an oil pipeline running between the Anna and Bruce platforms. In order to reduce the risk of a further spill, platform crews are displacing the existing oil in the pipeline with seawater. USCG and ADEC personnel have boarded the Anna platform and will be observing the operation. The Perseverance, a Cook Inlet Spill Prevention and Response (CISPRI) vessel, is also on scene and will remain there until the oil is removed from the line.
At this time, the cause of the release and sheen is unknown. Further updates will be provided when they become available.
Media can reach the Unified Command Information office by contacting:
Coast Guard Public Affairs
Platform A Gas Pipeline Leak (Hilcorp)
CIRCAC’s congressional mandates specify our role in crude oil transportation and facility operations. Though natural gas supply lines do not specifically fall within those mandates, we are concerned any time a hazardous substance is introduced into the Inlet. We’re providing our data and expertise in any way that can improve decisions being made about this incident, which is a reminder of Cook Inlet’s aging infrastructure, specifically subsea pipeline integrity.
CIRCAC’s Director of Science and Research, Susan Saupe, has been contacted as a subject matter expert about parts of the monitoring plan based on her experience sampling in Cook Inlet, including in the high current scenarios north of the Forelands. She has provided her recommendations to the state and resource agencies. As we understand, the State’s final recommendations to Hilcorp are still being considered. We’re also providing access to the ice camera network to assist.
Drift River Oil Terminal Spill
In July, Hilcorp Alaska reported a crude oil discharge associated with the piping system at the Drift River Oil Terminal tank farm. During investigation, a valve misalignment was discovered and the pump shut down. The investigation uncovered four different sites where oil contamination levels required excavation, ground water recovery and site remediation. The response continued until weather forced the suspension of operations and will be resumed this spring.
In July, Hilcorp reported a small leak from a buried crude oil line at the facility. The Beaver Creek Production Facility is located near Kenai in the Kenai National Wildlife Refuge. The leaking line had been isolated and approximately 25 gallons were spilled, 850 cubic yards of solids removed, five groundwater monitoring wells installed and over 30 confirmation samples collected. The case was transferred to ADEC’s Contaminated Sites Program for cleanup monitoring and evaluation due to its possible impacts to groundwater.
Nikiski KPL Dock
In December, a pipe ruptured at the KPL facility Tank 2400 waste water tank. The resulting discharge did not impact Cook Inlet nor were there any injuries. The ruptured pipe was isolated and contractors have been cleaning up the discharge. The Alaska Department of Environmental Conservation responded to the incident and investigated. The rupture was likely caused by freezing water in the pipe combined with pressure when put into service; 12.5 barrels of water and .6 barrels of hydrocarbons were recovered.