| Action Date |
Action |
Description |
DEC Staff |
| 2/17/2000 |
Site Added to Database |
Diesel fuel. |
David Pikul |
| 12/6/2001 |
Interim Removal Action Approved |
ADEC (Jim Frechione) conditionally approved the October 2001 Corrective Action Plan (CAP) submitted by BPXA as an interim removal action. |
Linda Nuechterlein |
| 5/8/2002 |
Document, Report, or Work plan Review - other |
Final Soil Treatment Workplan (PBOC Airstrip) dated May 8, 2002 was conditionally approved by ADEC. The project calls for thermal remediation of approximately 7,600 cubic yards of petroleum-contaminated material which originated from Kuparuk River State #1 (~4800 cy) and Sag Delta #1 (~2800 cy). The soil will be remediated at the Prudhoe Bay Operations Center (PBOC) Note: workplan and documentation for this effort is filed with the BPX Kuparuk River State file in the Anchorage CSP office. |
Linda Nuechterlein |
| 5/31/2002 |
Document, Report, or Work plan Review - other |
BP-USR Workplan Modification #1 dated May 31, 2002 prepared by American Env. on behalf of United Soil Recycling was approved by ADEC. |
Linda Nuechterlein |
| 8/1/2002 |
Interim Removal Action Approved |
This site was excavated in spring of 2002. The total amount of contaminated gravel removed from both areas that required treatment was approximately 4,500 yd3. All samples from excavations and stockpiles of overburden were below 1,000 mg/kg DRO, most were below ADEC Method One cleanup levels, and many were below detection limits. Selected samples were also analyzed for BTEX; and polycyclic aromatic hydrocarbons (PAHs). All results were well below the applicable ADEC Method Two cleanup levels. However, some uncertainty remains regarding the migration potential of residual contamination. Based on policy specific to the Arctic Zone (ADEC 1999), suprapermafrost groundwater (SGW) will be investigated to reduce the uncertainty associated with the potential migration of contamination to the Kuparuk River.
|
Linda Nuechterlein |
| 8/22/2002 |
Site Characterization Workplan Approved |
August 2002 Field Sampling Plan prepared by ENSR International for Kuparuk River State 1 was appproved. Work is scheduled to begin on or around August 23, 2002, and that the number and placement of the proposed monitoring wells will be dependent upon site conditions. |
Linda Nuechterlein |
| 8/24/2002 |
Update or Other Action |
The site was accessed by helicopter, and a total of 16 temporary MWs were installed manually. Water quality monitoring was conducted to determine effectiveness of remedial actions and to fulfill monitoring requirements. Concentrations of DRO above the GW cleanup level in 9 or 16 pore water sample locations were detected. |
Linda Nuechterlein |
| 9/14/2003 |
Update or Other Action |
Annual water quality monitoring was conducted to document hydrocarbon trends downgradient of the former drilling site. The 2003 analytical data was similar to the 2002 program. BTEX constituents continue to stay below CU levels. DRO was detected in 8 samples. PAHs sample results were below CU levels. |
Linda Nuechterlein |
| 8/18/2004 |
Update or Other Action |
Annual water quality monitoring was conducted to document hydrocarbon trends downgradient of the former drilling site. BTEX constituents continue to stay below CU levels. DRO above CU levels was detected in 10 of 14 samples. In comparisoin to 2003 data, DRO results were higher at nine sample locations. |
Linda Nuechterlein |
| 7/27/2005 |
GIS Position Updated |
TopozonePro. A huge sized map was used with 1:63K (AK) Series at a 1:100,000 scale. NAD83. |
Sarah Cunningham |
| 8/22/2005 |
Update or Other Action |
Annual water quality monitoring was conducted to document hydrocarbon trends downgradient of the former drilling site. BTEX constituents continue to stay below CU levels. DRO above CU levels was detected in 11 of 12 sample locations. |
Linda Nuechterlein |
| 1/10/2006 |
Update or Other Action |
Final Pore Water Monitoring and Soil Sampling Report for Kuparuk river State 1 dated 12/29/2005, submitted by Weston and recieved by the DEC on this date. 12 pore water samples taken. 11 out of the 12 MW samples indicate DRO contamination above Cleanup levels. Soil contamination appears to remain in small isolated areas adjacent to the previously excavated gravel pad. Increases of contamination from previous sampling events appears to be due to downgradient migration of plume from these isolated areas |
Linda Nuechterlein |
| 3/31/2006 |
Cleanup Plan Approved |
Approved Corrective Action Plan dated March 22, 2006. (See 3/31/06 letter for conditions.) BP to excavate DRO contaminated material exceeding 500 ppm and transport to East Dock for treatment by landfarming. |
Linda Nuechterlein |
| 5/3/2006 |
Update or Other Action |
BP's revised plan for backfilling the KRS site was approved. Excavation volume increased from ~1000 cubic yards to ~6500 cy. |
Linda Nuechterlein |
| 3/22/2007 |
Exposure Tracking Model Ranking |
Initial ETM ranking completed. |
Linda Nuechterlein |
| 3/23/2007 |
Update or Other Action |
2006 Pore Water Monitoring Report for Kuparuk river State 1 dated 3/23/2007 submitted by Weston and recieved by the DEC on this date. 12 pore water samples taken. Low DO in 7 MWs. 11 out of the 12 MW samples indicate DRO contamination above ADEC cleanup levels. BTEX was only found in two wells above ADEC cleanup levels, which is lower than previous sampling events. |
Linda Nuechterlein |
| 3/29/2007 |
Update or Other Action |
Kuparuk River State #1 2006 Corrective Action Report Final dated 3/12/2007, submitted by Oasis and recieved by DEC on this date. Approximately 4,800 loose cubic yards of restricted use and contaminated material were excavated and taken off site for treatment at East Dock Landfarm, and eventual reuse as reserve pit backfill at Lisburne 13. Confirmation samples collected from the floor and sidewalls of excavation. a complete monitoring report is being prepared separately by Weston. |
Grant Lidren |
| 8/3/2007 |
Update or Other Action |
Recieved and approved (verbal) Pore Water Monitoring WP dated August 1, 2007. |
Linda Nuechterlein |
| 12/17/2007 |
Update or Other Action |
Received 2007 pore water monitoring report for KRS 1 dated 11/5/07. Pore water was collected from 10 locations in 2007, 2 less than in previous years due to low water levels. DRO was detected above the Table C cleanup level of 1.5 mg/l in 9 of 10 samples ranging from 2.41 mg/l to 19.2 mg/l. PAHs were analyzed at three sample locations: none exceeded Table C cleanp levels. Contaminant concentrations in pore water appear stable, with no apparent trends in contaminant concentrations.An extensive contaminated soil excavation took place in April 2006 upgradient of the sampling area. Since the source has now been removed, over time it is expected that DRO and BTEX concentrations will continue to decrease. |
Linda Nuechterlein |
| 4/24/2008 |
Exposure Tracking Model Ranking |
A new updated ranking with ETM has been completed. |
Bill O'Connell |
| 4/29/2008 |
Conditional Closure Approved |
The Alaska Department of Environmental Conservation, Contaminated Sites Program (ADEC) reviewed the environmental records associated with Kuparuk River State 1. This site had been contaminated by the release of a hazardous substance; however, based on the information provided to date, ADEC has determined that no further remedial action is required, and that Kuparuk River State 1 can be closed subject to the conditions outlined in the Record of Decision. The hazardous substance contamination has been adequately addressed and does not pose an unacceptable risk to human health or the environment. This site is included on the Existing (Contaminated) Sites Charter for the Development of the Alaska North Slope (Paragraph II.A.3; Exhibit D.2). |
Bill O'Connell |
| 4/29/2008 |
Institutional Control Record Established |
There is contamination remaining above established cleanup levels at Kuparuk River State 1 but ADEC has determined there is no unacceptable risk to human health or the environment, and this site will be conditionally closed.
This decision is subject to the following conditions:
1. A Notice of Environmental Contamination will be recorded on the ADEC database to document that there is residual contamination remaining on site above the most stringent ADEC cleanup levels;
2. Any proposal to transport soil off site requires ADEC approval in accordance with 18 AAC 75.370 (b)
|
Bill O'Connell |
| 5/10/2012 |
Institutional Control Compliance Review |
IC review completed and staff changed from O'Connell to IC Unit. |
Evonne Reese |
| 12/4/2015 |
Institutional Control Compliance Review |
IC compliance review conducted, check with the landowner DNR regarding current land leases to find out if BPX is still the responsible party. After confirmation, send an IC reminder letter. Periodic review set for every five years. |
Evonne Reese |
| 3/21/2017 |
Institutional Control Compliance Review |
Follow-up IC compliance review conducted. Contacted ADNR to verify the current lessee of this property. Will issue a reminder letter once the lessee is confirmed. Reminder system set to check back in two months. |
Kristin Thompson |
| 8/15/2019 |
Institutional Control Compliance Review |
An Institutional Controls reminder letter mailed to the responsible party on this date. |
Mossy Mead |
| 3/12/2024 |
Institutional Control Update |
DNR-SAIL added as affiliate (Office of Primary Responsibility). For DNR LAS information: ADL# 420590
|
Jennifer McGrath |
| 6/21/2024 |
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 |
