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Site Report: Hilcorp NS Kuparuk State 7-11-12 (BPX)

Site Name: Hilcorp NS Kuparuk State 7-11-12 (BPX)
Address: Spine Road at Z Pad Access Road, Western Operating Area -Prudhoe Bay Unit, Deadhorse, AK 99734
File Number: 300.38.245
Hazard ID: 4254
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 70.316859
Longitude: -149.203308
Horizontal Datum:WGS84

We make every effort to ensure the data presented here is accurate based on the best available information currently on file with DEC. It is therefore subject to change as new information becomes available. We recommend contacting the assigned project staff prior to making decisions based on this information.

Problems/Comments

Assessment activities have documented DRO and GRO at concentrations above specific cleanup levels. Up to 7,740 mg/kg DRO and 1,780 mg/kg GRO in the Gravel Pad Area. In the Former Reserve Pit, DRO to 41,400 mg/kg in samples collected during the 2002 Phase II assessment, and in general the samples exhibiting DRO concentrations above 2,000 mg/kg also exhibited GRO, benzene, and total benzene, toluene, ethylbenzene, and xylene (BTEX) concentrations exceeding the ADEC-approved cleanup criteria. Elevated contaminant concentrations were predominantly found just above tundra grade in the pad material. Spill date represents estimated date of site Assessment by URS in 2001. The cited report is URS, 2002; "2001 Site Assessment Program, Kuparuk State #7-11-12" dated February 14, 2002. Spill date will need to be revised as more accurate information becomes available.

Action Information

Action Date Action Description DEC Staff
8/28/2002 Document, Report, or Work plan Review - other Reviewed 2002 Site Assessment report for Kuparuk State 7-11-12 (this action added 2/21/13). Ten boreholes were advanced at the gravel pad area. Soil samples contained DRO up to 7,740 mg/kg in a subsurface soil sample from near the base of the pad, GRO was detected up to 1,780 mg/kg in the same sample. Bill O'Connell
6/7/2006 Site Added to Database GRO, DRO, and BTEX above cleanup levels. Bill Petrik
6/8/2006 Site Ranked Using the AHRM Initial ranking. Bill Petrik
6/8/2006 Update or Other Action File number issued 300.38.245. Aggie Blandford
6/16/2006 Update or Other Action Reserve pit and flare pit closed. Gravel pad retained as a turnaround where Spine Rd. meets Z pad access rd. Site assessments by URS in 2001 and OASIS in 2002 documented DRO up to 7,740 mg/kg and GRO up to 1,780 mg/kg near the base of the pad. Bill O'Connell
3/21/2007 Exposure Tracking Model Ranking Bill O'Connell
2/22/2013 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 75220 name: historic/unknown Bill O'Connell
3/1/2013 Cleanup Complete Determination Issued The Alaska Department of Environmental Conservation, Contaminated Sites Program (ADEC) has completed a review of the environmental records associated with BPX Kuparuk State 7-11-12, located along Spine Road near Prudhoe Bay, Alaska. Based on the information provided to date, it has been determined that the contaminant concentrations remaining on site do not pose an unacceptable risk to human health or the environment and no further remedial action will be required as long as the site is in compliance with established institutional controls (ICs). Bill O'Connell
3/1/2013 Institutional Control Record Established Institutional Controls established and entered into the database. Bill O'Connell
6/21/2013 Institutional Control Compliance Review IC compliance review conducted and staff changed from Bill O'Connell to IC Unit. Reminder system set-up to follow-up with the responsible party in 2018. Kristin Thompson
12/4/2014 Update or Other Action Staff name changed from IC Unit to McLoone. Evonne Reese
9/28/2016 Update or Other Action At this time, the project manager chooses to retain management of this site which has institutional controls. IC Unit
2/15/2018 Institutional Control Periodic Reporting BPXA Kuparuk State 7-11-12 Verification of No Change in Land Use or Ownership letter, dated February 14, 2018 received. Joshua Barsis
10/8/2018 Document, Report, or Work plan Review - other Reviewed the 2018 Soil Sampling and Management Work Plan, dated October 2018. Proposed activities consist of removing roughly 40 cubic yards of potentially contaminated material for the purpose of constructing a well cellar. Provisions in the work plan include confirmation soil sampling in general accordance with Table 2B of the Field Sampling Guidance and sampling the excavated material for disposal purposes. ADEC approved this work plan via email on 10/08/2018. In the ADEC approval it was noted that sampling from the base and sidewalls of the excavation was not necessary, as it would not likely alter the CCIC designation of this site. Joshua Barsis
1/17/2019 Document, Report, or Work plan Review - other Reviewed the document titled: November 2018 Kuparuk 7-11-12 Field Monitoring Assessment Report, dated December 5, 2018. The report documents the field activities performed during construction of a well cellar. Roughly 68 cubic yards of potentially impacted gravel was removed during installation of the cellar. The gravel was disposed of at the grind and inject (G&I) facility. On-site field screening of soil indicated that contamination was likely encountered, as expected. Joshua Barsis
7/27/2022 Document, Report, or Work plan Review - other A waste management plan was approved for excavation and disposal of soil waste associated with proposed redevelopment on the gravel pad. Three new methane test wells and cable and gas lines installed. The work on the gravel pad is part of a larger redevelopment by ASRC Energy Services for a joint project funded by Japan Oil, Gas, and Metals National Corporation (JOGMEC) and the U.S. Department of Energy, National Energy Technology Laboratory. The larger redevelopment project includes construction on the reserve pit (closed under 18 AAC 60.440). No disturbance of the flare pit (also closed by Solid Waste in 2005) is anticipated by the larger redevelopment project. Waste generated by excavations will be disposed at the Hilcorp grind and inject facility or disposed at Oxbow landfill if it meets acceptance criteria. Any material proposed for disposal at Oxbow Landfill will be characterized and analyzed for GRO, DRO, RRO, VOC, PAH, and RCRA metals before transport approval and disposal. Lisa Krebs-Barsis
8/3/2022 Offsite Soil or Groundwater Disposal Approved Approval to dispose 147 cubic yards of contaminated fill related to the methane production project at the Hilcorp G&I. Lisa Krebs-Barsis
3/19/2024 Institutional Control Update DNR-SAIL added as affiliate (Office of Primary Responsibility). For DNR LAS information: ADL# 420785 Jennifer McGrath
8/5/2024 Institutional Control Compliance Review IC compliance review completed on this date. An IC reminder letter was issued to the responsible party and cc’d to the landowner. The next review will be in five years’ time. Gaige Robinson

Contaminant Information

Name Level Description Media Comments
DRO > Method 1 (Arctic only) Soil
GRO > Method 1 (Arctic only) Soil

Control Type

Type Details
Signed CS Determination

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site.
When Contaminated Soil is Accessible, Remediation Should Occur Address soil at pad decommissioning

No associated sites were found.

Missing Location Data

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State of Alaska Department of Environmental Conservation

P.O. Box 111800
Juneau, AK 99811-1800
Phone: 907-465-5066
Fax: 907-465-5245
TDD: 800-770-8973
Physical Location: 410 Willoughby