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Site Report: DeHarts Store - 11735 Glacier Highway

Site Name: DeHarts Store - 11735 Glacier Highway
Address: 11735 Glacier Highway, Juneau, AK 99801
File Number: 1513.38.086
Hazard ID: 25791
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 58.386011
Longitude: -134.644674
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 March 21, 2009 a plow vehicle struck an aboveground heating oil tank near the northwest corner of DeHarts Auke Bay Store, releasing ~600-700 gallons of diesel fuel from the tank to the ground surface. The fuel traveled into the crawlspace beneath the north end of the building and into the foundation drain system. From the drain system the fuel travelled through a drain culvert, pipe, and into Auke Bay at Statter Harbor. The building is comprised of a commercial store and four residential apartments. Following initial response efforts contaminated soil remains above DEC cleanup levels remains in the building crawlspace.

Action Information

Action Date Action Description DEC Staff
12/27/2011 Spill Transferred from Prevention Preparedness and Response Program Spill transferred by PERP staff Scot Tiernan. Spill no. 09119908001; spill date = 3/21/09; substance = diesel; quantity = ~600-700 gallons; source = heating oil AST fuel line. Mitzi Read
12/29/2011 Site Added to Database A new site has been added to the database Mitzi Read
12/29/2011 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 79229 name: Heating Oil AST Mitzi Read
1/31/2012 Potentially Responsible Party/State Interest Letter DEC posted a letter today to the responsible party DeHarts LLC with a formal request to submit a workplan for DEC approval. The purpose for site investigation into residual soil contamination in the building crawlspace is risk evaluation of exposure pathways inherent to residential land use. Results will determine if additional soil removal cleanup activity is necessary. The letter includes notification of State Interest for RFA cost recovery procedures, introduction to CS quality assurance, workplan requirements and the cleanup process. Bruce Wanstall
10/3/2013 Document, Report, or Work plan Review - other DEC evaluated a work plan for corrective action by Nortech and by email provided conceptual approval but stipulated required changes be re-submitted by Nortech in a new corrective action plan. DEC requested that the site characterization analyte list be expanded to include BTEX compounds for both soil and groundwater and that drainage control measures do not allow leachate from the oxidation soil treatment to migrate off-site. Bruce Wanstall
2/24/2014 Update or Other Action DEC received Corrective Action Plan – Petroleum Contaminated Soil DeHarts Store - 11735 Glacier Highway (Plan), dated February 2014 and submitted by Nortech Environmental Engineering Health & Safety. The objective of the Plan is to remediate contaminated soil that resulted from the accidental spill of between 600 and 700 gallons of heating oil from an above ground tank in March 2009. The fuel entered the building crawlspace and the foundation drainage system that discharges into Statter Harbor. The estimated eighty cubic yard volume of contaminated soil excavated from around the building was transported and remediated off-site. An estimated volume of seventy five gallons of fuel was recovered during emergency response activity. An estimated volume of fifty cubic yards of contaminated soil remains in the building crawlspace. Bruce Wanstall
2/27/2014 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 79229 Heating Oil AST. Bruce Wanstall
7/29/2014 Update or Other Action Nortech has implemented the contaminated soil treatment according to the DEC approved plan. After several applications, PID petroleum vapor readings in the crawlspace fell below the detection limit. Readings inside the building have been consistently below the instrument detection limit for volatile hydrocarbon compounds. Bruce Wanstall
6/12/2015 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 79229 Heating Oil AST. Bruce Wanstall
12/7/2015 Document, Report, or Work plan Review - other DEC has reviewed Site Remediation Assessment Report DeHarts Store 11735 Glacier Highway Juneau AK (Report), dated September, 2015. Nortech Engineering Inc. (Nortech) completed the report documenting environmental sampling at the DeHarts Store to assess the effectiveness of the Corrective Action Plan soil treatment remedy. DEC approved the analytical data indicating that DRO levels have been reduced to near cleanup levels and benzene concentrations in soil that remain above cleanup levels in all samples. In order to consider the Report recommendation for a cleanup complete determination, DEC requested Nortech submit an evaluation of the surface water and indoor air completed pathways for the Site. The Report does not mention the applying the Regenesis ORC-A (ORC) oxygen time-release soil treatment to stimulate longer-term in-situ bio-remediation by microbes, as specifically stated in Section 4.0 in the Corrective Action Plan, 4.1 Specifications of Proposed Corrective Actions. The ORC could be very effective in reducing benzene levels remaining in the soil. Bruce Wanstall
4/11/2016 Document, Report, or Work plan Review - other DEC evaluated and approved by email amendments to the 2014 Corrective Action Plan based on sampling result findings in the 2015 Nortech Assessment Report (approved by DEC in December, 2015). Nortech will collect soil samples in the crawlspace to assess effectiveness of ORC soil treatment and will collect 24-hour vapor samples from each of two indoor floor areas in the commercial building to asses indoor air quality. Bruce Wanstall
8/24/2016 Document, Report, or Work plan Review - other DEC reviewed the April 2016 Remediation Assessment and Indoor Air Quality 11735 Glacier Highway Juneau Alaska submitted by Nortech Environmental Inc. and sent a report approval letter to the responsible party. Benzene was below instrument detection in all three air canister indoor air samples but was detected in one of out of the three soil samples collected in the crawlspace at a concentration of 0.0768 milligrams per kilogram. Bruce Wanstall
8/25/2016 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 79229 Heating Oil AST. Bruce Wanstall
9/15/2016 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 79229 Heating Oil AST. Bruce Wanstall
9/22/2016 Cleanup Complete Determination Issued DEC completed a review of the environmental records associated with the DeHarts Store – 17735 Glacier Highway. 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 institutional controls are maintained and effective and no new information becomes available that indicates residual contamination poses an unacceptable risk. A Notice of Environmental Contamination has been recorded in the State Recorder’s Office as an institutional control (IC) that identifies the nature and extent of contamination at the property and the conditions that the owners and operators are subject to in accordance with this decision document. DEC has determined the residual soil contamination does not pose an unacceptable migration to groundwater concern. A restriction on installing groundwater wells or using groundwater from the site without prior DEC approval. Bruce Wanstall
9/23/2016 Institutional Control Record Established Institutional Controls established and entered into the database. Bruce Wanstall
10/6/2016 Institutional Control Compliance Review IC compliance review conducted. Staff changed from Bruce Wanstall to IC Unit. Reminder system set to follow-up on the ICs Agreement page in one month. Subsequent compliance reviews will occur every five years. Kristin Thompson
11/23/2016 Institutional Control Update An IC reminder letter requesting the signed ICs Agreement Page was issued on this date. Kristin Thompson
12/12/2016 Institutional Control Update Received the signed ICs Agreement Page on this date. Kristin Thompson
5/25/2022 Update or Other Action While a new floor was being installed in the shop floor a strong diesel smell was encountered in water in gutters underneath the floor. Three 4’ X 4’ holes were dug to install perforated pipes but were disconnected so the contamination did not migrate. The holes are supposed to manage drainage under the building since the business is located close to the Auke Bay shoreline. Fans were brought in so that the holes could be completed without exposing workers and people in the store to petroleum fumes. The soil was placed back into the four holes at the same depth the soil was originally. It reportedly easy to tell the difference between the overburden and the deeper soil. Nortech is supposed to take some indoor air readings in the crawlspace. If the readings are above the action levels, then another round of VI monitoring inside the building including the apartment hallways will be done. A report with the findings will be submitted to ADEC. Evonne Reese
8/26/2022 Institutional Control Compliance Review IC compliance review conducted and a reminder letter was issued. The letter included a request for details on May 2022 contamination encountered during the floor replacement. Evonne Reese

Contaminant Information

Name Level Description Media Comments
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil
Benzene Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil

Control Type

Type Details
Notice of Environmental Contamination
Signed CS Determination

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site. Standard condition.
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) Standard condition.
Groundwater Use Restrictions A restriction on installing groundwater wells or using groundwater from the site without prior DEC approval.
Hazard ID Site Name File Number
24499 Deharts Store - Auke Bay 1531.26.001

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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