Skip to content Skip to content

Alaska Department of Environmental Conservation

You are here: DEC / SPAR / CSP / SPAR Online Services / Contaminated Sites Search / Site Report

Site Report: Residence - 1081 Acorn Circle

Site Name: Residence - 1081 Acorn Circle
Address: 1081 Acorn Circle, North Pole, AK 99705
File Number: 100.38.255
Hazard ID: 26320
Status: Cleanup Complete - Institutional Controls
Staff: Shawn Tisdell, 9074512752 shawn.tisdell@alaska.gov
Latitude: 64.819171
Longitude: -147.439113
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

In August 2014, it was reported to DEC that fuel was present on groundwater that had flooded the crawlspace of the residence at 1081 Acorn Circle. Significant precipitation in the summer of 2014 caused regionally elevated groundwater levels. The source of the release was determined to be an adjacent 500-gallon underground heating oil tank. The quantity of diesel fuel released was unknown. During initial site assessment activities the tank and approximately 8 cubic yards of petroleum-contaminated soil were removed. Excavation was limited to maintain the structural integrity of the residence. Laboratory analysis confirmed petroleum contamination above DEC cleanup levels remains in soil and groundwater. Petroleum vapors were noted in the crawlspace but had not been reported inside the living space. The extent of remaining contamination has not been determined.

Action Information

Action Date Action Description DEC Staff
11/26/2014 Spill Transferred from Prevention Preparedness and Response Program Spill transferred by PERP staff Paul Lhotka. Spill no. 14309922003; spill date = 8/8/14; substance = diesel; quantity = unknown; source = 500-gallon underground heating oil tank; PERP file no. 100.02.155. Mitzi Read
12/11/2014 Site Added to Database A new site has been added to the database Mitzi Read
12/12/2014 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 79713 name: 500-Gallon Underground Heating Oil Tank Mitzi Read
12/29/2014 Potentially Responsible Party/State Interest Letter PRP letter sent. Willett Boger
5/18/2015 Update or Other Action Communication with RP and consultant, ARES, about work plan being put together for ground water characterization and follow up on vapor mitigation system. Willett Boger
1/27/2016 Update or Other Action Consultant informed DEC that a Ground Water Monitoring Well has been installed at the property. Willett Boger
8/3/2016 Site Visit DEC staff visited the site and met with ARES staff and the RP. The recovery well and monitoring well were observed outside the home. Slight sheen was observed in the high water of the crawlspace. The PID measured 2.5 ppm in the crawlspace, indicating some VOCs were present. Shawn Tisdell
5/3/2017 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 79713 500-Gallon Underground Heating Oil Tank. Shawn Tisdell
10/12/2017 Update or Other Action Consultant installed direct push well, conducted well survey and determined groundwater flow direction and gradient. At this time, groundwater flow is to the NW in the direction of monitoring well MW1. Shawn Tisdell
10/24/2017 Update or Other Action A review of site cleanup activities was conducted. Recommendations for additional site characterization include sampling groundwater, evaluating groundwater flow direction and gradient, and collecting indoor air samples. Shawn Tisdell
3/19/2018 Document, Report, or Work plan Review - other Work plan to conduct indoor air testing and groundwater monitoring has been reviewed and approved. Site visit is set up for 3/20/2018. Shawn Tisdell
3/20/2018 Site Visit DEC staff screened indoor air for VOCs and measured pressure differential in living areas, the crawlspace and the garage in preparation for a passive air sampling event. The mitigation system was shut off following the screening activity. A follow up site visit was planned the following week to observed if indoor VOC levels had changed. Shawn Tisdell
3/30/2018 Site Visit A follow-up site visit was conducted by DEC staff. Total VOCs were screened and pressure differential was evaluated. Shawn Tisdell
10/22/2018 Update or Other Action Transport approval provided to remove 15% filled 55 gallon drum containing recovery well fuel, water and sorbents from site and treat at OIT Inc. Shawn Tisdell
11/27/2018 Cleanup Complete Determination Issued Cleanup complete with institutional controls has been issued by the Department. Site characterization and closure documentation attachments have been uploaded to the database. Shawn Tisdell
11/27/2018 Institutional Control Record Established Institutional Controls established and entered into the database. Shawn Tisdell
11/29/2019 Institutional Control Update Email sent to RP requesting update on vapor barrier integrity and if they had any other problems or concerns about managing remaining contamination at the site. Shawn Tisdell
12/18/2019 Update or Other Action RP indicated that the vapor barrier is working. If a hole is made in the barrier, they tape it up. The fan is still working and things seem to be fine. Shawn Tisdell
12/14/2020 Institutional Control Periodic Reporting ADEC sent out a letter requesting a response from the new owners of 1081 Acorn Circle. This letter requested additional contact information and documentation that the crawlspace vapor barrier was remaining in good repair. A January 14, 2021 response deadline was provided with the letter. Shawn Tisdell
12/21/2020 Institutional Control Periodic Reporting Inspection of crawlspace and vapor barrier: DEC staff talked with the new homeowner about any changes in the crawlspace that may have compromised the vapor barrier or vapor mitigation system (VMS)or if they have observed petroleum odors in or near the crawlspace. The RP indicated that they seldom go into the crawlspace, but that the HRV is serviced twice a year and that if any rips develop that they have vapor barrier tape ready to seal it up. Documentation requested in an 12/14/2020 Institutional Controls Verification letter were provided during the phone call. Shawn Tisdell
12/5/2022 Institutional Control Periodic Reporting Inspection of crawlspace and vapor barrier: DEC staff emailed homeowner about the condition of crawlspace vapor barrier. The homeowner indicated they check the crawlspace often and have not observed any problems. DEC will check again with the RP in 2025. Shawn Tisdell

Contaminant Information

Name Level Description Media Comments
BTEX Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil
1-Methylnaphthalene Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil
2-Methylnaphthalene Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil
Naphthalene Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil

Control Type

Type Details
Notice of Environmental Contamination

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site.
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)
Groundwater Use Restrictions No groundwater wells shall be installed in the area covered by the institutional controls without prior ADEC approval.
Maintenance / Inspection Of Engineering Controls The crawlspace vapor barrier should be inspected at least annually prior to the heating season to verify that leaks and tears haven’t compromised the integrity of the barrier. Repair with appropriate materials as necessary. If requested, ADEC will be allowed access to the crawlspace on an annual basis to verify vapor barrier integrity. If odors are observed in the crawlspace or elsewhere in the house that may be associated with the heating oil contamination, ADEC should be contacted.
When Contaminated Soil is Accessible, Remediation Should Occur Within the building footprint, contaminated soil remains beneath the residence in the crawlspace and possibly under the garage slab. Outside of the building, contaminated soil is estimated to be deeper than two feet below ground surface and extends to the west, north and south from the former underground tank location as noted in the attached photo. When the building is removed and/or the soil becomes accessible, the soil must be evaluated and contamination addressed in accordance with an ADEC approved work plan.
New Construction Restrictions If the use of the building changes, or if other buildings are constructed within 30 feet of the contaminated area, ADEC must be notified and may require a vapor intrusion evaluation to determine if building occupants could be affected by vapors.

No associated sites were found.

Missing Location Data

Because the GIS location data for this site has not been entered, we cannot direct you to its position on the map. Click "Continue" to proceed to the Contaminated Sites Web Map or "Close" to return to the site report.
Continue     Close

Public Notices  •  Regulations  •  Statutes
Press Releases  •  Contact

 

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