Site Report: NSB Atqasuk Power Plant Waste Heat Recovery Line
| Site Name: | NSB Atqasuk Power Plant Waste Heat Recovery Line |
|---|---|
| Address: | Ekosik Street; N of Vacuum Bldg; S of Power Plant; E of Clinic, Atqasuk, AK 99791 |
| File Number: | 390.38.002 |
| Hazard ID: | 25373 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 70.482649 |
| Longitude: | -157.424772 |
| 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 8/20/08 ethylene glycol was discovered in a drainage ditch north of the vacuum building. The source was determined to be a "T" in the waste heat recovery line. Based on the amount of ethylene glycol added to the system since August 2006, the release amount was estimated at 1,500 gallons. An additional release occurred in 2010 when a snow plow damaged a line east of the Washeteria on Ekosik Street with an approximate 900 gallons of ethylene glycol released.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 3/3/2009 | Spill Transferred from Prevention Preparedness and Response Program | Spill transferred by PERP staff John Ebel. Spill no. 08399923301; spill date = 8/20/09; substance = ethylene glycol; quantity unknown (estimated at 1,500 gallons); PERP file no. 390.02.004. | Mitzi Read |
| 3/10/2009 | Site Added to Database | A new site has been added to the database | Mitzi Read |
| 3/11/2009 | Exposure Tracking Model Ranking | Initial ranking with ETM completed for source area id: 78735 name: Waste Heat Return Line - Ethylene Glycol | Mitzi Read |
| 2/9/2011 | Site Characterization Report Approved | Reviewed post spill trip report dated September 15, 2008. Surface water samples were collected from drainages leading away from the spill site 2-3 days after the spill occurred. Ethylene glycol was detected in two samples at 890 mg/l and 1,400 mg/l which were collected from a ditch leading from the spill site. | Bill O'Connell |
| 2/10/2011 | Site Characterization Report Approved | Reviewed Ethylene Glycol Release Assessment report dated November 4, 2010. Two glycol releases have occurred at the power plant, a 1,500 gallon release in 2008 and a spill of 750-900 gallons in 2010. Investigation at the site was conducted in 2010 and focused on drainages leading away from the spill sites, where surface water and soil samples were collected. Based on field screening results, 10 surface water samples were collected and analyzed for glycols by 8015B, which were not detected in any sample. 15 soil samples were collected from areas most likely to be impacted by the spill. Ethylene glycol was detected in two samples at 17 mg/kg and 350 mg/kg (duplicate = 230 mg/kg), with one sample location above the migration to groundwater cleanup level of 190 mg/kg. | Bill O'Connell |
| 12/8/2011 | Meeting or Teleconference Held | Meeting today with NSB to discuss site status and potential future activities at the site. Sampling/delineation needed. | Bill O'Connell |
| 10/31/2014 | Exposure Tracking Model Ranking | A new updated ranking with ETM has been completed for source area 78735 Waste Heat Return Line - Ethylene Glycol. | Keather McLoone |
| 4/7/2015 | Document, Report, or Work plan Review - other | Date of receipt via email of electronic copy of document entitled Draft Work Plan, North Slope Borough Atqausk Power Plant Waste Heat Recovery Line. This effort is intended to provide additional characterization. Field screening for propylene and ethylene glycol using HACH kits will be performed as well as soil and surface water samples to be analyzed for propylene and ethylene glycol. Only surface soil sampling is included in this workplan. | Keather McLoone |
| 5/15/2015 | Document, Report, or Work plan Review - other | Date of receipt via email of revised workplan. | Keather McLoone |
| 8/27/2015 | Document, Report, or Work plan Review - other | Reviewed Final Site Characterization Report, dated August 2015. Four surface soil samples and one surface water sample were collected and analyzed for glycols. Ethylene glycol was detected at 0.940 mg/L in the water sample collected from 2008 power plant release location, which is well below of the approved cleanup level of 73 mg/L. Glycol was not present in any of the soil sample results. | Joshua Barsis |
| 9/2/2015 | Cleanup Complete Determination Issued | Reviewed the environmental records for the NSB Atqasuk Power Plant Waste Heat Recovery Line site. 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 this site will be closed. | Joshua Barsis |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| Ethylene Glycol | < Method 2 Most Stringent | Soil |
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.