Site Report: NPS Kennecott Mine Monroe Tank 4(1)
| Site Name: | NPS Kennecott Mine Monroe Tank 4(1) |
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| Address: | Kennicott Mine, McCarthy, Chitina, AK 99566 |
| File Number: | 2235.38.001 |
| Hazard ID: | 2441 |
| Status: | Active |
| Staff: | Brittani Mack, 9072628205 brittani.mack@alaska.gov |
| Latitude: | 61.487903 |
| Longitude: | -142.890195 |
| Horizontal Datum: | WGS84 |
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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
Monroe Tank is a 273,000 gallon above ground storage tank located on privately owned lot 71 of the Kennicott Subdivision north east of the Kennecott Mine power plant. Soil in the area is contaminated with petroleum. Soil samples near the tank had total petroleum hydrocarbon (TPH) ranging from 3,500 to 120,000 mg/kg. Samples around the fuel pipeline had TPH ranging from 240 to 320,000 mg/kg and 250,000 mg/kg of DRO in the one sample where DRO was analyzed. These soil samples were collected in 1992. The AST on the property was drained and cleaned in 1997. Approximately 26,660 gallons of fuel identified as Bunker C or similar fuel was contained in the tank before draining.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 6/15/1992 | Preliminary Assessment Approved | (Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)). Done as a comprehensive SA for the area in 1992. | Mike Krieber |
| 3/23/1995 | Site Added to Database | Petroleum contamination. | Mike Krieber |
| 3/23/1995 | Update or Other Action | Cleanup will not be required at this time but may in the future. | Mike Krieber |
| 5/24/1995 | Update or Other Action | The Monroe tank is located on the border of property owned by Mike Monroe. The spill actually occurred on property owned by The Great Kennicott Land Co. who was overseer and operator of the tank located on the Monroe property via a fuel line attached to the tank. | Mike Krieber |
| 5/9/1996 | Site Ranked Using the AHRM | Ranked by Shannon and Wilson. | S&W |
| 10/17/1996 | Site Ranked Using the AHRM | Reviewed S&W ranking. Changed Population Proximity Value from 0.5 to 1; GW Usage Value from 0.8 to 0.4; SW Usage Value from 0.2 to 1; and SW Environments from 2 to 0. | Mike Krieber |
| 2/21/1997 | Update or Other Action | Received Kennicott Mine Pre-Acquisition Environmental Site Assessment Report. Letter sent to RP indicating that CS program staff will take over work on all CS projects, including the remaining items at the Kennicott Mine sites. | Mike Krieber |
| 6/30/2008 | Exposure Tracking Model Ranking | Initial ranking with ETM completed. | Janice Wiegers |
| 9/30/2014 | Potentially Responsible Party/State Interest Letter | Potentially responsible party letter sent to the National Park Service. | Melody Debenham |
| 9/17/2015 | Update or Other Action | Received update from NPS. Lead based paint and asbestos mitigation completed. Petroleum contamination cleanup at Power Plant completed in 2004/2010, including removal of Bunker C from piping in power plant building. | Melody Debenham |
| 6/26/2017 | Meeting or Teleconference Held | NPS officials from the Contaminated Sites Program in Denver and from the regional office in Anchorage traveled to Nabesna and Kennicott mines to develop a strategy for investigation and remediation of the mines. DEC participated in a preliminary meeting to share information on the each agency's contaminated sites program and broad vision for the future of the sites. | Joy Whitsel |
| 3/11/2019 | Update or Other Action | PA received from NPS. NPS is in the process of hiring a CERCLA PM. | Gretchen Caudill |
| 8/13/2021 | Document, Report, or Work plan Review - other | DEC sent comments on the Draft Final Phase I RI SAP. Work was begun at the site before ADEC had the necessary time to review, comment, and correspond to approve the RI SAP. ADEC requires further characterization from what is detailed in the SAP, to be conducted at a later date. A detailed CSM needs to be completed to understand the data gaps to fill in future years. ADEC also requested several reports that had not been delivered to ADEC for review in years' past. | Tim Sharp |
| 8/17/2022 | Meeting or Teleconference Held | ADEC met with NPS and representatives from Ahtna to discuss multiple site histories and potential paths forward for remediation and eventual closure with or without ICs. | Tim Sharp |
Contaminant Information
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Control Type
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Requirements
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No associated sites were found.