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Site Report: NSB Barrow Public Works Shop II

Site Name: NSB Barrow Public Works Shop II
Address: Stevenson Street, Between B & C Avenues, Barrow, AK 99723
File Number: 310.38.032
Hazard ID: 26555
Status: Active
Staff: Andrea Carlson, 9074515174 andrea.carlson@alaska.gov
Latitude: 71.303240
Longitude: -156.757800
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

On 3/31/2015 a report was received that a release of diesel fuel had occurred on 3/28/2015. The report indicated that a tank truck operator had overfilled a piece of equipment that was located at the North Slope Borough Barrow Shop II pad. An estimated 100 gallons of ultra low sulfur diesel fuel were spilled onto compacted snow over a gravel surface. Initial response actions included applying absorbent materials and scraping up contaminated snow with heavy equipment. The initial impacted area was reported to be 6 yards, however the contaminated snow that was scraped up during the response was not placed on a liner and instead contaminated an additional area not impacted by the initial spill. Diesel range organics (DRO), gasoline range organics, residual range organics (RRO), and polynuclear aromatic hydrocarbons were confirmed present above DEC cleanup levels in excavated soil. A work plan was developed and approved for additional cleanup and delineation, then second and third phases of work took place during winter and summer site conditions. Additional confirmation sampling indicated DRO and RRO remained at the site above DEC cleanup levels. The Barrow Shop II area where the spill occurred is a heavy equipment shop and staging area and historic petroleum contamination was encountered during the second and third phases of initial response actions.

Action Information

Action Date Action Description DEC Staff
4/7/2015 Potentially Responsible Party/State Interest Letter Potentially Responsible Party / State Interest Letter sent to North Slope Borough by PPRP staff Paul Lhotka. Mitzi Read
5/3/2016 Spill Transferred from Prevention Preparedness and Response Program Spill transferred by PPRP staff Paul Lhotka. Spill no. 15399908701; spill date = 3/28/15; substance = diesel; quantity = ~100 gallons; PPRP file no. 310.02.018. Mitzi Read
5/5/2016 Site Added to Database A new site has been added to the database Mitzi Read
5/26/2016 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 79913 name: NSB Barrow Public Works Shop II Mitzi Read
6/20/2016 Document, Report, or Work plan Review - other Reviewed the Final Assessment Report, dated May 21, 2015. Activities mainly consisted of excavating impacted snow and soil to a maximum depth of 2.5 feet bgs. An estimated 87 cubic yards of impacted soil was removed and stockpiled onsite. Impacted snowmelt was disposed of in the Barrow treatment lagoon. Confirmation samples collected from the base and sidewalls of the excavation revealed that levels of DRO remain in the excavation up to 9,420 mg/kg. Joshua Barsis
6/22/2016 Document, Report, or Work plan Review - other Reviewed the Additional Site Characterization Draft Report, dated October 30, 2015 for the NSB Barrow Public Works Shop II site. The report describes additional excavation and characterization activities completed in August and September 2015 in order to address remaining contamination left in place after the initial excavation. Roughly 405 cubic yards of impacted soil was removed from this site, along with 4,580 gallons of potentially-contaminated water that was recovered from the base of the excavation pit. Analytical soil samples were collected from the base and sidewalls of the excavation, and also from five test pits that were advanced in an effort to delineate the remaining contamination. Results revealed that DRO and RRO remain above the cleanup levels in the excavation and test pits up to 4,920 mg/k and 5,550 mg/kg, respectively. The potentially-contaminated water was treated using a GAC filter and was discharged to the soils of the site. The excavated soil has not yet been disposed of or treated and remains onsite. Recommendations outlined in the report include further delineation of the vertical and horizontal extent of contamination, and further excavation of impacted soil. ADEC responded to this report via letter dated June 22, 2016. Work plan requested by August 1, 2016. Joshua Barsis
8/25/2016 Document, Report, or Work plan Review - other Reviewed the document entitled Additional Site Characterization Work Plan-Further Characterization and Removal of Contaminated Soil, dated August 23, 2016 for the NSB Barrow Public Works Shop II site. Proposed activities mainly consist of advancing ten soil borings, three of which will be completed as monitoring wells, and collected soil and water samples as appropriate. Joshua Barsis
1/17/2017 Update or Other Action Letter sent to NSB on this day detailing the current status/progress of 22 active contaminated sites, including this site. Joshua Barsis
11/20/2017 Update or Other Action Letter sent on this day as a follow up to the last version of this letter, dated January 17, 2017, and as a follow up to a meeting with NSB on November 17, 2017. This letter details the current status/progress of 23 active contaminated sites, including this site. Joshua Barsis
8/22/2018 Update or Other Action Sent a letter on this day to outline the history of this site and the current data gaps that are preventing this site from closure. Requested that the August 2016 approved work plan be implemented during the 2019 field season. Joshua Barsis
11/16/2018 Update or Other Action Letter sent on this day as a follow up to the last version of this letter, dated November 20, 2017, and at the request of the North Slope Borough (NSB). This letter details the current progress of 24 active contaminated sites, including this site. Joshua Barsis
12/13/2019 Enforcement Action Compliance letter sent on this day with site summary and identification of data gaps: A spill report was received on March 31, 2015 indicating that a tank truck operator had overfilled a piece of equipment that was located at the North Slope Borough Barrow Shop II pad. An estimated 100 gallons of ultra-low sulfur diesel fuel was spilled onto compacted snow over a gravel surface. Initial response actions included applying absorbent materials and scraping up contaminated snow and soil with heavy equipment. An estimated 87 cubic yards of impacted soil was removed and stockpiled onsite. Impacted snowmelt was disposed of in the Barrow treatment lagoon. Confirmation samples collected from the base and sidewalls of the excavation revealed that levels of Diesel Range Organics (DRO) remain in the excavation up to 9,420 mg/kg. The initial impacted area was reported to be 6 yards, however the contaminated snow and soil that was stockpiled during the response was not placed on a liner, ended up contaminating an additional area not impacted by the initial spill. Additional excavation and characterization were completed in August and September 2015 in order to address remaining contamination left in place after the initial excavation. Roughly 405 cubic yards of impacted soil was removed from this site, along with 4,580 gallons of potentially-contaminated water that was recovered from the base of the excavation pit. Analytical soil samples were collected from the base and sidewalls of the excavation, and also from five test pits that were advanced in an effort to delineate the remaining contamination. Results revealed that DRO and Residual Range Organics (RRO) remain above the cleanup levels in the excavation and test pits up to 4,920 mg/k and 5,550 mg/kg, respectively. The potentially-contaminated water was treated using a GAC filter and was discharged to the soils of the site. The excavated soil has not yet been disposed of or treated and remains onsite. A work plan was prepared in August 2016 to further delineate the vertical and horizontal extent of contamination with soil borings and monitoring wells. This plan was approved by ADEC on August 25, 2016, but was not completed. During the last meeting between ADEC and NSB on January 17, 2017, it was agreed that this effort would be completed during the 2018 field season. To date, ADEC has not received notification that the field effort was completed, or that it is still planned. Data Gaps: (1) The extent of contamination has not been sufficiently delineated; (2) The onsite stockpile of contaminated soil needs to be treated or disposed of. Joshua Barsis
2/19/2020 Enforcement Action Notice of Violation issued to NSB on February 18, 2020. See file for more information. Joshua Barsis
6/29/2022 Enforcement Agreement or Order A compliance order by consent (COBC) was signed by the North Slope Borough and ADEC Division of SPAR. The COBC identifies corrective actions that the NSB will take to manage cleanup waste and characterize and remediate contaminated sites and spills. Lisa Krebs-Barsis
9/13/2023 Site Visit DEC personnel (Krebs-Barsis, Joyce) conducted a site visit of Shop II for compliance with the COBC, the visit also looked at the Warm Storage and Shop III. The Public Works Shop II source area is adjacent to Stevenson Street and is used as a parking area. Lisa Krebs-Barsis
3/6/2024 Site Characterization Workplan Approved NSB requested in an email on February 23, 2024, to use the previously approved 2016 Work Plan for site characterization. Reviewed the document entitled Additional Site Characterization Work Plan-Further Characterization and Removal of Contaminated Soil, dated August 23, 2016 for the NSB Barrow Public Works Shop II site. Proposed activities mainly consist of advancing ten soil borings, three of which will be completed as monitoring wells, and collecting soil and water samples as appropriate. Requested that NSB complete one additional boring as a monitoring well and acknowledge the comments in the original DEC approval letter sent August 26, 2016. Site characterization work is scheduled for Summer 2024. Andrea Carlson
9/16/2024 Update or Other Action Approved transport of Four 55-gallon steel open-top drums generated from boring advancement and monitoring well installation during 2024 field work. These drums will be transported from the site to a secondary containment cell located east of Shop II while pending evaluation of waste characterization sample for disposal. Andrea Carlson

Contaminant Information

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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
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