Site Report: NSB Deadhorse Former Water and Wastewater Treatment Plant
| Site Name: | NSB Deadhorse Former Water and Wastewater Treatment Plant |
|---|---|
| Address: | Corner of Sag River Road and DS12 Access Road, Deadhorse, AK 99734 |
| File Number: | 300.38.321 |
| Hazard ID: | 26726 |
| Status: | Active |
| Staff: | Laura Jacobs, 9074512911 laura.jacobs@alaska.gov |
| Latitude: | 70.212263 |
| Longitude: | -148.404967 |
| 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
Petroleum contamination was encountered in soil at concentrations above the cleanup level during a Phase II site assessment at the former North Slope Borough (NSB) SA-10 water and wastewater treatment plant. The sources of contamination appear to be a former fuel pipeline and releases to the interior of the building that migrated through cracks in the slab to the gravel pad below.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 6/15/2017 | Site Added to Database | A new site has been added to the database | Mitzi Read |
| 6/20/2017 | Document, Report, or Work plan Review - other | Reviewed Phase II Site Assessment for former NSB WWTP. The objective of the Phase II was to evaluate the recognized environmental conditions documented in a Phase I report at the former WWTP, specifically areas of petroleum contamination at the southwest corner of the property and former incinerating and tipping areas, the location of former ASTs near the new WWTP, areas of damage to the concrete slab, and accumulated incinerator ash that had collected in the interior of the building. Additional investigation was conducted in the former tank farm area that was not covered by the new WWTP, along an underground pipeline from the former tank farm to the former WWTP, and along the northern edge of the pad where DRO was detected in surface water. These last three areas are specific to a separate site, the NSB Deadhorse New Water and Wastewater Treatment Plant. Information on that site can be found in File #300.38.309 At the Former WWTP, 20 soil borings were advanced and sampled in the areas of concern noted above. Sample results indicated an area of petroleum contamination located primarily underneath the building. DRO was detected up to 4,520 mg/kg and GRO was detected up to 373 mg/kg. Xylenes and 1,2,4-trimethylbenzene were also detected above cleanup levels. Previous samples of the incinerator ash indicated exceedances of the TCLP limits for cadmium, lead, and mercury. | Bill O'Connell |
| 6/20/2017 | Exposure Tracking Model Ranking | Initial ranking with ETM completed for source area id: 80091 name: Former Water and Wastewater Treatment Plant | Bill O'Connell |
| 6/23/2017 | Potentially Responsible Party/State Interest Letter | Bill O'Connell | |
| 2/19/2020 | Enforcement Action | Notice of Violation issued to NSB on February 18, 2020. See file for more information. | Joshua Barsis |
Contaminant Information
| Name | Level Description | Media | Comments |
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Control Type
| Type | Details |
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Requirements
| Description | Details |
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| Hazard ID | Site Name | File Number |
|---|---|---|
| 26074 | NSB Deadhorse New Water and Wastewater Treatment Plant | 300.38.309 |