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Site Report: City of North Pole Fire Well Pump House 8th Avenue

Site Name: City of North Pole Fire Well Pump House 8th Avenue
Address: 2705 Old Richardson Highway; SE Corner of 8th Avenue and Snowman Lane, North Pole, AK 99705
File Number: 100.38.224
Hazard ID: 25469
Status: Active
Staff: Jim Fish, 9074512117 james.fish@alaska.gov
Latitude: 64.748034
Longitude: -147.349886
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 July 8, 2009, a fuel pump malfunctioned causing an underground day tank to overflow and release diesel from the vent pipe to the ground surface outside the west side of the pump house. The fire well pump house is on the far northwest corner of the property where North Pole Middle School is located. 30 Cubic yards of contaminated soil was excavated and treated at OIT. A recovery well and monitoring well were installed at the time of the release. Free product was recovered from the water table intermittently for approximately a year after the release. Additional monitoring wells were installed offsite, and COC's have been detected above cleanup levels in groundwater. Soil gas collected in the road ROW during 2019 exceeded residential target levels for petroleum VOCs. Vapor intrusion is being explored at downgradient residential structures across the street, within 100 feet from the pump house.

Action Information

Action Date Action Description DEC Staff
11/5/2009 Spill Transferred from Prevention Preparedness and Response Program Spill transferred by PERP staff Brian Jackson. Spill no. 09309918902; spill date = 7/8/09; substance #2 diesel; quantity = ~500 gallons. Mitzi Read
11/20/2009 Site Added to Database A new site has been added to the database Mitzi Read
12/2/2009 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 78828 name: Day Tank Overfill Mitzi Read
1/28/2015 Final Cleanup Report Reviewed Soil removal actions were conducted in 2009. Contamination extended to the water table. Free product recovery efforts continued until recovery was no longer feasible. Contamination likely extends under the pump house. No groundwater data was evident in the file but residents in the area are on city water. Exposure or subsurface soil may still be a concern if excavation were to occur in the future. Site closure with Institutional controls might be possible if groundwater was evaluated. Kim DeRuyter
1/28/2015 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 78828 Day Tank Overfill. Kim DeRuyter
3/29/2017 Update or Other Action Contacted City Manager for update on site progress Jim Fish
7/11/2017 Update or Other Action City has contracted with consultant to review data gaps and propose a course of action for site closure. Jim Fish
2/21/2018 Update or Other Action Received contractor scope of services from City Manager; work plan for well installation and groundwater monitoring pending. Jim Fish
2/26/2018 Meeting or Teleconference Held Teleconference held to discuss work plan development with City NP staff and consultant Jim Fish
3/23/2018 Document, Report, or Work plan Review - other Work plan monitoring well installation & sampling approved Jim Fish
4/25/2018 Document, Report, or Work plan Review - other Revised location of eastern monitoring well (moved because of utility locates) discussed and approved today; final revised work plan received. Jim Fish
7/25/2018 Document, Report, or Work plan Review - other Received 2018 groundwater monitoring well installation and sampling report. Petroleum hydrocarbons were detected at concentrations above ADEC cleanup levels in both soil and groundwater at all three well locations (MW18-01, MW18-02,and MW-01). Consultant recommends additional delineation. Jim Fish
4/22/2019 Update or Other Action Received draft work plan for additional site characterization - soil borings, groundwater sampling, groundwater elevation, soil gas sampling, and possible VI evaluation in residential buildings (if warranted). Jim Fish
5/2/2019 Update or Other Action Received responses to work plan questions - two monitoring wells will be installed down-gradient of the pump house in 2019 (DEC had recommended additional delineation of groundwater using temporary well points); an assumption is being made that contamination exists beneath the building, but no assessment of vapor intrusion risk is being proposed at this time (although it is acknowledged as an open pathway in the CSM), instead assessment of vapor intrusion risks is being proposed for down gradient residences. Jim Fish
5/21/2019 Document, Report, or Work plan Review - other Work plan approved (additional monitoring well installation was included down-gradient of the pump house). Jim Fish
4/14/2020 Document, Report, or Work plan Review - other Received 2019 Site characterization report Jim Fish
8/14/2020 Document, Report, or Work plan Review - other Work plan received and approved for vapor intrusion investigation at residences located down gradient from the pump house (within 100 feet). Indoor air, outdoor air, and sub-slab (or near-slab or exterior soil gas) samples will be collected, depending on access permission. Jim Fish
11/23/2020 Document, Report, or Work plan Review - other Received 2020 report for vapor intrusion evaluation of down-gradient residences. Soil gas and indoor air data indicate vapor intrusion was not occurring. Jim Fish
11/23/2020 Update or Other Action DEC received copies of letters sent to residences whose properties were sampled for vapor intrusion, and provided with sampling data by the consultant. Jim Fish
3/22/2021 Update or Other Action Approved work plan addendum, outlining recovery well decommissioning, and new monitoring well installation and proposed sampling. DEC encouraged consultant to consider a one-time substrate injection in the recovery well prior to decommissioning. Such action is still pending, awaiting vendor response. Work plan addendum was approved so consultant can move forward with proposed work. An update work plan addendum may be submitted if substrate addition materializes. Jim Fish
6/1/2021 Cleanup Plan Approved Approved one-time injection of PetroFix into the recovery well (prior to decommissioning) at the CONP Firewell Pump House site. Jim Fish
9/3/2021 Document, Report, or Work plan Review - other Received Summer 2021 Site Characterization report from consultant. Recovery well RW-1 was decommissioned and PetroFix and commerical electron acceptor blend for hydrocarbon remediation was injected. A soil boring was advanced and sampled and later completed as a new groundwater monitoring well (MW-21-01); groundwater was sampled from all monitoring wells; wells were surveyed and groundwater flow direction and gradient were determined. Jim Fish
9/14/2021 Site Characterization Report Approved Approved Summer 2021 Site Characterization report Jim Fish
11/18/2021 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 78828 Day Tank Overfill. Jim Fish
12/9/2021 Document, Report, or Work plan Review - other Received Fall 2021 Summary Report from consultant Jim Fish
12/16/2021 Site Characterization Report Approved Approved Sept 2021 Groundwater sampling & assessment reprot. Recommeded consultant and RP consider the PetroFix treatment for Mw-21-01 as had been done for the former recovery well. Jim Fish
5/26/2022 Update or Other Action Receive update from contractor for spring sampling event; MW-18-02 was frozen, so sampling will be delayed until fall 2022. Agreed to subsequent sampling events being scheduled for late June. Jim Fish
8/22/2022 Document, Report, or Work plan Review - other Approved work plan amendment for substrate injection (PetroFix) Jim Fish
9/1/2022 Update or Other Action Contacted consultant to notify EPA Region 10 UIC Program about planned substrate injection Jim Fish
9/14/2022 Update or Other Action Received notification that monitoring well in ROW (MW21-01) was paved over this summer. CONP crew cut the pavement around the well and it now useable (will be receiving substrate injection). Jim Fish
11/4/2022 Update or Other Action Received a Spring 2022 Summary Report Submittal from consultant for review. Jim Fish
8/21/2023 Document, Report, or Work plan Review - other Received the Fall 2022 summary report from consultant today. Jim Fish
8/31/2023 Long Term Monitoring Workplan or Report Review Fall 2022 8th Avenue monitoring report approved. Jim Fish
7/1/2024 Long Term Monitoring Workplan or Report Review Received 2023 sampling report from consultant and concur with recommended sampling schedule: Semiannual sampling from the on-site and off-site monitoring wells downgradient of the former recovery well and UST (MW-1, MW18-01, MW18-02, MW19-01, MW19-02, and MW21-01); Sampling at a reduced frequency (e.g., once every two years) from monitoring wells upgradient of the release area, (MW-2, MW19-03, and MW19-04); and Monitoring the presence of PetroFix during sampling events. Jim Fish

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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