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Site Report: Sourdough Fuel Beaverbrook Mall

Site Name: Sourdough Fuel Beaverbrook Mall
Address: 3330 Badger Road; SE Corner of Badger and Hurst, North Pole, AK 99705
File Number: 100.26.031
Hazard ID: 24263
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 64.762011
Longitude: -147.347153
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

Hydrocarbons were first detected in groundwater beneath the site in 1991. The UST system was upgraded in 1992. An air sparge vapor extraction system (AS/VES) was installed at the site in 1996, and operated untill 1999. Free product was detected in several on-site wells, though long term monitoring suggests that the amount of free product has declined, and is currently detected irregularly in only one monitoring well near the pumps. The AS/VES was successful in reducing volatile contaminants, and the site was nearing a NFRAP status. However, contamination above cleanup levels has been detected again in 2005 and 2006 putting the no further action decision on hold.

Action Information

Action Date Action Description DEC Staff
6/28/1991 Site Added to Database Former Staff
6/28/1991 Leaking Underground Storage Tank Release Confirmed - Petroleum LUST Site created in CSP for source area ID 77627 ADD; LUST site. Former Staff
9/1/1991 Release Investigation SI; VRCA Environmental Services conducted soil gas survey, soil sampling, and drilled 7 borings to groundwater as part of petroleum release investigation at property. Soil samples as high as 2639 ppm TPH from the 8 - 10 ft. depth. BTEX found in monitoring wells below MCLs. Exact dates unknown. Former Staff
9/18/1991 Leaking Underground Storage Tank Corrective Action Underway RAPR; Timmons gave approval for RP to excavate tanks and piping in spring of 1992 Timmons will investigate RP's request to use Arctic Hose. Former Staff
3/3/1992 Update or Other Action RPL2; ADEC/Peterson sent PRP-CS Database Notification letter requesting PRP update and provide additional environmental information concerning the site. Petro Star Inc. responded 3/92. Former Staff
6/15/1992 Underground Storage Tank Site Characterization or Assessment SA1R; Basketfield reviewed. Former Staff
9/30/1992 Release Investigation SA2; Kalu/ Gibler - Approved placement of two additional monitor wells to North and East of MW #2. Former Staff
9/4/1993 Leaking Underground Storage Tank Cleanup Initiated - Petroleum LCAU; Kalu - CAP is being developed. SA2 has been completed. Former Staff
6/6/1994 Update or Other Action CORR; Wingerter sent letter informing RP of their financial liability under new ADEC cost recovery policy. State is authorized, under Section 9003(h) of the Resource Conservation and Recovery Act to take action on this lust facility. Former Staff
6/9/1994 Update or Other Action TA; HUNG: For FAP - requested SA and RI reports. Contacted RPCON for appropriate documents that we did not have on file and selected appropriate documents from our file for copying. Mailed to FAP 6/10/94. Former Staff
1/24/1995 Leaking Underground Storage Tank Corrective Action Underway LCAR; Approved CAP, rec'd 1/24/95, after RPCON supplied > 2 yrs. quarterly MW data, updated QAPP, & supplied other missing info not in file. CAP proposes SVE/Air Sparging on soil/grd. water contam. Very high Benzene levels since '92. Plan approved based on prelim. pilot study lacking specifics. DEC wants more info as project proceeds. Former Staff
4/5/1995 Update or Other Action MEET; RPCON requests meeting to resolve QAPP and field QC issues. QAPP approved by SCRO 9/91, known as RZA, Inc. AGRA, Fbks. uses same QAPP. Had not updated nor adopted std. QAPP. Routinely samples 3 sites using one duplicate and no trip blanks for EPA 602. RPCON agreed to begin work w/RZA to update QAPP and adopt std. QAPP. Former Staff
11/20/1997 Update or Other Action ADEC sends Notification of Intent to Cost Recover Letter to Current Owner: FAIRBANKS FUEL SUPPLY Former Staff
9/6/2002 Update or Other Action System was shutdowin in early 1999 to evaluate risk-based closure. Groundwater concentrations rebounded in MW-2, MW-6, MW-7, BB-1, and BB-2 by August, 1999. Janice Wiegers
9/6/2002 Update or Other Action Site not monitored for several years. Monitoring reports indicate that benzene levels increased from 9 to 546 ppb between August 1999 and June 2001, but has declined since then. Benzene is now present in MW-3 at the northern property boundary. Janice Wiegers
1/10/2003 Update or Other Action Drive Point Well Installation and Groundwater Sampling report submitted. AmT-1 and NPVH-2 were installed off-site. Benzene and DRO were found above cleanup levels (7.31 ppb and 1.63 ppm) in NPVH-2 at the northeast corner of Badger and Hurst. Janice Wiegers
1/29/2003 Update or Other Action Conceptual Site Model submitted. Janice Wiegers
4/30/2003 Update or Other Action Met with Walter Gore and Travis-Peterson, Inc. Discussed conceptual site model and additional work needed at the site for a NFRAP. Janice Wiegers
5/12/2003 Update or Other Action Groundwater Monitoring report submitted for April sampling event. Benzene exceeded cleanup levels in MW-3, MW-6, MW-7, and B-3 (maximum of 65 ppb in MW-7). DRO exceeded cleanup levels in MW-6 and MW-7. Janice Wiegers
6/25/2003 Document, Report, or Work plan Review - other Addition to spring monitoring report submitted. MW-2 sampled: benzene at 9 ug/L and DRO at 3.8 mg/L. MW-5 was dry and not sampled and has since been removed by DOT. North Pole city water is extending down Hurst, and the Vet Clinic should be hooked up to city water by fall. Janice Wiegers
8/22/2003 Document, Report, or Work plan Review - other Well installation notice submitted. MW-5, which was destroyed during consturction activities, was replaced by a drive point. Janice Wiegers
10/14/2003 Document, Report, or Work plan Review - other Groundwater monitoring report submitted. Highest benzene concentraton at MW-2 (99 ppb). Benzene was also detected in the Veterinary Clinics drinking water well at 2 ppb. This clinic is now reported to be on City water. Well AmT-1 was removed during construction. Travis-Peterson proposes decommissioning of the system and a NFRAP. A formal NFRAP request will be required. Janice Wiegers
11/17/2003 Update or Other Action NFRAP denied until additional information concerning residual contaminant levels can be provided. Decommissioing of system and select monitoring wells approved. Janice Wiegers
12/12/2003 Update or Other Action Monitoring well and system decommissioning report submitted. MW-4, MW-6, BB-1, BB-2, B-3, 10 air sparging wells and 3 vapor extraction wells were pulled or the casing was broken up with and auger and boring was grouted. 10 wells were not found and will be decomissioned in the spring. Monuments will also be removed and an asphalt patch applied in the spring. Janice Wiegers
1/2/2004 Update or Other Action NFRAP request received. ADEC responded on 2/24/04 with request for additional information regarding remaining soil contamination. Confirmation soil analyses may be necessary. Janice Wiegers
6/3/2005 Update or Other Action Update GIS using FNSB GIS and TopoZone Pro. Kim DeRuyter
7/5/2005 Document, Report, or Work plan Review - other GW monitoring report submitted. MW-7 remains above cleanup levels for DRO; BETX analytes were detected below cleanup. All other MWs sampled were Non-detect, or below cleanup levels. Kim DeRuyter
9/1/2005 Update or Other Action Update GIS using ArcReader PM Map tools, pursuant to reported benzene in well in area (Horseshoe Way). Previous location had site in roadway. John Carnahan
12/12/2005 Update or Other Action Groundwater monitoring report received GRO and DRO contamination is up markedly at MW-7. Report indicates cracks in concrete at pumps may be a conduit of surface spills to groundwater. Kim DeRuyter
2/21/2006 Update or Other Action Consultant received confirmation that the Veterinary Clinic downgradient of the site did not hookup to the water main. Water is supplied to the business from an on-site well. Kim DeRuyter
5/24/2006 Document, Report, or Work plan Review - other Spring GW monitoring report, only North Pole Veterinary Hosptial -1 was sampled. EPA Method 524.2 revealed no detections of VOCs. Kim DeRuyter
10/2/2006 Document, Report, or Work plan Review - other Semi-annual groundwater sampling results received. MW-2 contained 33 ug/L benzene up from ND this spring. MW-3 detected 42 ug/L benzene and 192 mg/L GRO both were ND in spring. MW-7 contained 185 ug/L benzene up from 1.49 ug/L in spring. Kim DeRuyter
1/18/2007 Update or Other Action Sent letter rejecting conditional closure request and recommending continued semi-annual monitoring and the addition of a new well north west of the current tank array. Kim DeRuyter
2/8/2007 Long Term Monitoring Established The site management plan for the Beaver Brook Mall retail fuel station will include sample collection from MW-2, and MW-3, the two off-site monitor wells on the North Pole Veterinary Hospital property, and the North Pole Veterinary Hospital drinking water well on a one time per year basis. The groundwater monitor well samples will be analyzed for DRO, GRO, and BTEX analytes. The drinking water well will be analyzed for BTEX analytes only. Monitor well MW-7 may be decommissioned. However, groundwater in this vicinity must be evaluated prior to consideration of a closure status for this site. Kim DeRuyter
2/13/2007 Exposure Tracking Model Ranking Site was ranked on current site data, however current soil and groundwater data near the building are not available which casued indoor air to rank as high potential exposure which may be overly conservative. Evaluation of current soil and groundwater data would be necessary to eliminate concern over this pathway. Kim DeRuyter
10/26/2007 Document, Report, or Work plan Review - other Reviewed annual GW sampling and MW decommission of 2007. Decommissioned MW-7 as approved. In NPV-2 level rose from ND in 2006 to 8.47 ppb in 2007. Benzene lvls have decreased in MW-2 and MW-3. Former Staff
9/25/2008 Document, Report, or Work plan Review - other ADEC received the 2008 Groundwater Monitoring Report from Travis/ Peterson. Monitoring wells MW1 and MW2 continue to have benzene levels above cleanup. Wells on the North Pole Veterinary Clinic had DRO below cleanup and benzene was non-detect. Tamara Cardona-Marek
12/18/2008 Meeting or Teleconference Held ADEC discussed with Petro Star all Sourdough Fuel sites. The Beaverbrook gas station is on long term monitoring. Wells MW2, MW-3, NPV1, NPV2, and the drinking water well at the veterinary clinic should be sampled again in 2009. The groundwater in the source area or immediately downgradient of the source area must be sampled before ADEC considers a cleanup complete with institutional controls determination for this site. Tamara Cardona-Marek
5/26/2010 Update or Other Action DEC requested that Petro Star sample for sulfolane one well within the source area to determine if sulfolane may be a COC. Tamara Cardona-Marek
2/18/2011 Document, Report, or Work plan Review - other DEC received from Travis /Peterson the 2010 Groundwater Monitoring Report. Monitoring wells MW-3 and NPV-1 were sampled as well as the drinking water well from the North Pole Veterinary Clinic. Wells NPV-2 and MW-2 could not be sampled and may need to be replaced. No sulfolane detected in well MW-3. Benzene was detected at 5.33 ppb in well MW-3. Tamara Cardona-Marek
2/18/2011 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 77627 Current piping and dispenser, former USTs. Tamara Cardona-Marek
1/4/2013 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 77627 Current piping and dispenser, former USTs. Robert Burgess
6/10/2013 Update or Other Action Site symbol visually adjusted using ArcGIS and satellite imagery. Robert Burgess
6/27/2013 Institutional Control Record Established Institutional Controls established and entered into the database. Robert Burgess
6/27/2013 Cleanup Complete Determination Issued Cleanup Complete with Institutional Controls decision document finalized. ICs include land use reporting, notice of environmental contamination, requirement of approval before installing wells or excavating in area of contamination, monitoring existing wells every 3 years, and approval and characterization before removal of soil or groundwater. Robert Burgess
8/9/2013 Update or Other Action DEC received the signed IC agreement from Petro Star. Robert Burgess
9/24/2013 Document, Report, or Work plan Review - other DEC reviewed and approved a revised long term monitoring and well decommissioning work plan. Off-property well NPV-1 will be decommissioned and the remaining wells (all on the Sourdough Fuels property) will be monitored every three years, beginning in 2013, until at least three consecutive events demonstrate there is no increase in contaminant concentrations and contaminants remain below cleanup levels in groundwater. Robert Burgess
10/28/2013 Document, Report, or Work plan Review - other On this date, Robert Burgess issued a letter in response to the 2013 Groundwater Monitoring Report. A downgradient well on property adjacent to the Beaver Brook mall was decommissioned. On-property groundwater monitoring wells MW-2, MW-3, and MW-7 were sampled for BTEX. Results indicated that benzene has increased in well MW-2 to levels above the ADEC groundwater cleanup level (specifically, benzene was reported at 0.00592 mg/L). Because MW-2 acts as a sentinel well to detect migration to contaminants off-property, ADEC formally requested to have the drinking water well at the North Pole Veterinary clinic sampled for BTEX using EPA method 524.2 by November 30, 2013. Due to the increase in concentration noted in this sampling event, ADEC requested that the next groundwater sampling event be scheduled for September of 2014. (This action entry was entered retroactively, during a file review on 10/27/2017). Kristin Thompson
10/6/2014 Institutional Control Compliance Review IC compliance review conducted and staff changed from Robert Burgess to IC Unit. Reminder system set to follow-up with the responsible party in 2016. Kristin Thompson
6/5/2017 Update or Other Action The Notice of Environmental Contamination and Institutional Controls was recorded this date. Kristin Thompson
10/27/2017 Document, Report, or Work plan Review - other IC Unit staff reviewed the 2016 Groundwater Monitoring Report submitted by Travis/Peterson Environmental Consulting, Inc. Monitoring wells MW-2, MW-3, and MW-7 were sampled on August 22, 2016 and analyzed for BTEX compounds. All analyte detections were below applicable cleanup standards. MW-2 did not detect any analytes. The next scheduled monitoring event for this site will be conducted in 2019. Kristin Thompson
12/20/2019 Institutional Control Compliance Review Received an IC compliance letter from Petro Star listing that all of the ICs are in compliance and land use has not changed. We are still waiting on the groundwater monitoring report. The monitoring was completed in early October so it should be arriving in the near future. Evonne Reese
9/21/2020 Document, Report, or Work plan Review - other Groundwater monitoring results for the November 2019 event have been reviewed. All analyte detections were below cleanup levels during this event. It has been agreed that after three consecutive monitoring events with well concentrations below cleanup levels, that well will be eliminated from the next round of sampling. The next scheduled monitoring event is scheduled for September 2022. Both MW-3 and MW-7 have completed the three consecutive events therefore in 2022 only monitoring well MW-2 will be included. Evonne Reese
9/7/2022 Document, Report, or Work plan Review - other Received the 2022 Groundwater Monitoring Report for this site. It will be reviewed in the next couple of weeks. Evonne Reese
9/16/2022 Institutional Control Compliance Review Groundwater monitoring results for the August 2022 event have been reviewed. Once again, all analyte detections were below cleanup levels during this event. This is the third consecutive monitoring event (2016, 2019, and 2022) where all samples result were below cleanup levels, therefore the requirement of future groundwater monitoring will be rescinded. A letter will be issued to the landowner with these details. All other ICs are in compliance. Evonne Reese
2/8/2024 Institutional Control Update Provided an approval for the groundwater monitoring wells to be decommissioned by the end of 2024. Evonne Reese
7/17/2024 Document, Report, or Work plan Review - other Approved a soil and groundwater management plan according to the Utility and Right-of-Way Tech Memo specifications. There is an upcoming sewer line replacement project where this tech memo can be applied. Evonne Reese
9/26/2024 Institutional Control Update Received confirmation report on groundwater wells decommissioned. Gaige Robinson

Contaminant Information

Name Level Description Media Comments
DRO > Human Health/Ingestion/Inhalation Soil Most recent soil data is from early 1990s, subsequent treatment has likely reduced concentrations
Benzene < Method 2 Most Stringent Soil Residual contamination in vadose zone is possible; no current soil data is available.
GRO < Method 2 Most Stringent Soil Residual contamination in vadose zone is possible; no current soil data is available.

Control Type

Type Details
Notice of Environmental Contamination
Signed CS Determination

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site.
Excavation / Soil Movement Restrictions
Groundwater Use Restrictions ADEC approval before well installation
Other Every three years or when change in use occurs
When Contaminated Soil is Accessible, Remediation Should Occur
Movement or use of contaminated material (including on site) in a manner that results in a violation of the water quality standards is prohibited (18 AAC 70)

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
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