Site Report: AT&T Alascom Tolovana Amplification Site
| Site Name: | AT&T Alascom Tolovana Amplification Site |
|---|---|
| Address: | MP 55 Elliott Highway; ~10 Miles SE of Livengood, Livengood, AK 99730 |
| File Number: | 180.38.012 |
| Hazard ID: | 26843 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 65.448642 |
| Longitude: | -148.245072 |
| 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
On November 28, 2016 it was discovered that approximately 1,500 gallons of ultra low sulfur diesel fuel had been released in the generator building at the AT&T Alascom Tolovana Amplification Site due to a mechanical failure of a fuel filter housing. The fuel spilled inside the generator building and then onto the ground beneath the building. The unmanned amplification site consists of a communications building on skids, a generator building on skids, and a 4,000-gallon double-walled aboveground storage tank. The site is fenced and locked while unoccupied. Initial response efforts included cleaning the interior and excavation of contaminated material beneath and in front of the generator building. Excavation was limited due to infrastructure. Impacted soil not exceeding DEC human health cleanup levels remains at the base and sidewalls of the eastern edge of the excavation, beneath portions of the buildings and fuel tank, along portions of the fiber optic corridor and in a small location along the Elliot Hwy.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 12/5/2016 | Potentially Responsible Party/State Interest Letter | Potentially Responsible Party / State Interest Letter sent to New Horizons Telecom, Inc. by PPRP staff Paul Lhotka. | Mitzi Read |
| 6/30/2017 | Update or Other Action | 1500 tons of contaminated material were excavated from beneath the amplification station access road and transported to OIT in Moose Creek. | Shawn Tisdell |
| 3/6/2018 | Spill Transferred from Prevention Preparedness and Response Program | Spill transferred by PPRP staff Paul Lhotka. Spill no. 16309933302; spill date = 11/28/16; substance = ultra low sulfur diesel; quantity ~1,500 gallons; PPRP file no. 180.02.003; description: failure of the fuel filter housing in the generator building caused a release of fuel inside and onto the ground beneath the building. | Mitzi Read |
| 3/7/2018 | Site Added to Database | A new site has been added to the database | Mitzi Read |
| 3/23/2018 | Meeting or Teleconference Held | Teleconference between affiliated parties including representatives from the RP, the DNR, the DOT and TPECI to discuss cleanup action plan addendum #2. This addendum modifies the December 2016 Sampling and Analysis plan to include site characterization along the Elliot Hwy east of the site and south using direct push technology. The addendum will be updated in response to comments and discussions provided during and following the meeting. | Shawn Tisdell |
| 5/10/2018 | Document, Report, or Work plan Review - other | Report titled 2018 "Statement of Work" received. This work plan outlines excavation and confirmatory sampling of contaminated soil along the fiber optic corridor between the repeater station and the Elliot Highway. | Shawn Tisdell |
| 6/18/2018 | Site Characterization Workplan Approved | DEC provided approval for a revised Statement of Work to excavate contaminated soil described in the 5/10/2018 action entry. This work is scheduled for 6/26/2018. | Shawn Tisdell |
| 6/26/2018 | Site Visit | DEC met RP and consultant at site to conduct an excavation along the fiber optic corridor. Two sampling pits were excavated, headspace samples were collected. It was determined that additional excavation beyond original estimates is necessary and that additional equipment will be needed to continue clean-up in this area. | Shawn Tisdell |
| 6/27/2018 | Update or Other Action | Five samples were collected by consultant from two sampling pits and submitted for analytical analysis. | Shawn Tisdell |
| 7/6/2018 | Site Visit | DEC staff stopped by site during a site visit to a neighboring site. Observations including photos indicated that site conditions around the fiber optic corridor were stable. Pits that had been dug were not filled with water. The three supersacks that had been removed from the site were gone. | Shawn Tisdell |
| 7/6/2018 | Exposure Tracking Model Ranking | Initial ranking with ETM completed for source area id: 80205 name: Generator Bldg - 1,500-Gallons Ultra Low Sulfur Diesel | Shawn Tisdell |
| 7/25/2018 | Meeting or Teleconference Held | Meeting with responsible party, new consultant and DNR to discuss change in selection of consultant and challenges to characterizing remaining contamination at the site. We discussed previous results and remaining data gaps. | Shawn Tisdell |
| 7/30/2018 | Site Visit | DEC staff met with staff from Shannon and Wilson to walk over the site in preparation for a work plan to be developed that will characterize remaining contamination at the site. | Shawn Tisdell |
| 8/8/2018 | Meeting or Teleconference Held | Meeting with Shannon and Wilson staff and RP to discuss path to site closure, assessing the groundwater pathway and evaluating potential ecological impact of remaining contamination at the site. | Shawn Tisdell |
| 8/22/2018 | Document, Report, or Work plan Review - other | Received work plan outlining site characterization of remaining diesel contamination along the Elliot Hwy and along the fiber optic corridor south and east of the lease property. | Shawn Tisdell |
| 1/17/2019 | Final Cleanup Report Reviewed | DEC received a site characterization report evaluating remaining contamination and exposure pathways at the site. Twenty four soil borings were advanced on October 9-10, 2018. Field screening and analytical samples indicated that the distribution of contamination had been determined. Permafrost was observed across the site. A request was made for the DEC to consider site closure without institutional controls. | Shawn Tisdell |
| 6/28/2019 | Cleanup Complete Determination Issued | Shawn Tisdell |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| DRO | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil | 2208 mg/kg |
| GRO | < Method 2 Most Stringent | Soil | 157 mg/kg |
| Benzene | < Method 2 Most Stringent | Soil | 0.006 mg/kg |
| Isopropylbenzene | < Method 2 Most Stringent | Soil | 5.14 mg/kg |
| Ethylbenzene | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil | 2.24 mg/kg |
| 1-Methylnaphthalene | < Method 2 Most Stringent | Soil | 0.23 mg/kg |
| 2-Methylnaphthalene | < Method 2 Most Stringent | Soil | 0.641 mg/kg |
| Naphthalene | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil | 0.289 mg/kg |
| 1,2,4-Trimethylbenzene | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil | 43.89 mg/kg |
| 1,3,5-Trimethylbenzene | Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation | Soil | 16.05 mg/kg |
Control Type
| Type | Details |
|---|---|
| No ICs Required |
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) |
No associated sites were found.