Site Report: Circle School - Teacher's Housing
| Site Name: | Circle School - Teacher's Housing |
|---|---|
| Address: | Old School Location, Circle, AK 99733 |
| File Number: | 160.38.001 |
| Hazard ID: | 1605 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 65.827261 |
| Longitude: | -144.066827 |
| Horizontal Datum: |
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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
A reported release of heating oil (ADEC spill number 92309930501/Circle School – Teacher Housing site) occurred on October 31, 1992 next to the Yukon Flats School District (YFSD) teacher housing building. According to the spill report, an estimated 400 to 600 gallons of heating oil released from a cracked fuel line associated with a 500-gallon aboveground storage tank (AST) used to heat the teacher housing building. According to our records, this spill was not investigated until 2006, in conjunction with a separate release near the new school site (See file number 160.38.002).
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 7/13/2004 | Site Added to Database | DRO contamination. Cleanup actions unknown. | Deborah Williams |
| 7/13/2004 | Site Ranked Using the AHRM | Preliminary ranking. | Deborah Williams |
| 4/2/2007 | Update or Other Action | Refer to ADEC file 160.38.002 Circle School Fuel Release for further remediation details. During 12/06 ADEC recieved 'Circle School Soil Remediation Report' detailing the removal of two 7,000 gallon ASTs and one 500 gallon AST (associated with ADEC file 160.38.001). Extensive soil and groundwater contamination identified on site. Approximately 1500 cubic yards of contaminated soil excavated from the site and transported (with ADEC approval) to the village landfill for use as a cover source. Areas of contamination remain underneath uitlities and the Old School Building foundation (now the Teacher Housing). Excavation was not possible without damage to the sewage system or the foundation of the building. Soil contamination remains up to 45,000 mg/kg DRO. Groundwater has been impacted up to 23.2 mg/L DRO. Groundwater is thought to be a perched aquifer originating from the sewage lagoon, which is within 50 feet of this site. The site is underlain by a thick layer of permafrost. | Shannon Oelkers |
| 4/3/2007 | Meeting or Teleconference Held | Met with Mark Rockwell and Aaron Hall from Rockwell Engineering & Construction. Discussed Circle site and possible CAP for summer. | Shannon Oelkers |
| 4/4/2007 | Exposure Tracking Model Ranking | Ranked site using ETM. | Shannon Oelkers |
| 9/4/2008 | Update or Other Action | Reviewed the June 2008 report titled: Circle School Soil Remediation Project by Rockwell ECS Inc. which includes information on both 160.38.001 Teacher Housing and 160.38.002 Fuel Release (information will be copied in both files). The field efforts completed in 2007 included: field screening, analytical sampling and laboratory analysis to determine extent of soil contamination east of the previously identified sewer line and south of the former high school. The groundwater directional flow is to the northeast and a contamination plume is pushing northeast from the location of the former fuel tanks responsible for the contamination. Water samples from groundwater monitoring wells showed DRO and Benzene in levels exceeding clean-up criteria in one monitoring well (MW9). Soil samples taken from the area of the two 7,000 gallon tanks confirmed DRO and Benzene contamination exceeding ADEC clean-up levels. All other soil samples were below clean-up levels. Indoor air quality was evaluated in the crawlspace under the teachers’ housing facility and inside the teachers’ housing facility. The results were all below EPA allowable levels from EPA subsurface Vapor Intrusion Guidance, Table 2a, November 2002. The drinking water well on-site was unable to be evaluated due to ‘logistical difficulties' during the 2007 site visit, more information is needed to assess the drinking water well situation in Circle. | Pam Clemens |
| 1/15/2009 | Update or Other Action | Second email request to Bill Walz as follow-up on the letter dated 9-08 requesting a letter of intent on the Circle School Fuel Release and the Circle School Teacher's Housing sites. | Pam Clemens |
| 4/9/2009 | Update or Other Action | Received a copy of the letter of intent from John Christian, the Facilities Manager for the Yukon Flats School District (YFSD), that was sent 1-27-09. The school district is unable to do further remediation at the two sites in Circle (also see 160.38.002). They will secure the old drinking water well as per Rockwell E & C recommendations with a lock and signage, allowing it to be used as a possible groundwater monitoring point in the future. This work should be completed in the summer of 2009. | Pam Clemens |
| 10/25/2010 | Update or Other Action | Spoke with Gale Bourne who went to Circle last month but could not find the well housing behind the teacher's housing building. They will continue to look for it and contact me when they are able to add the lock as discussed. | Pam Clemens |
| 12/29/2010 | Exposure Tracking Model Ranking | A new updated ranking with ETM has been completed for source area 72583 Former 500 gallon HOT. | Pam Clemens |
| 3/23/2012 | Exposure Tracking Model Ranking | A new updated ranking with ETM has been completed for source area 72583 Former 500 gallon HOT. | Bill O'Connell |
| 1/6/2015 | Exposure Tracking Model Ranking | A new updated ranking with ETM has been completed for source area 72583 Former 500 gallon HOT. | Joshua Barsis |
| 1/25/2016 | Update or Other Action | Sent letter on this day in reference to two listed contaminated sites; the Circle School Fuel Release site (file number 160.38.002) and the Circle School – Teacher Housing site (file number 160.38.001). The purpose of the letter was to provide the responsible party with a site history and outline existing data gaps. | Joshua Barsis |
| 6/2/2016 | Update or Other Action | Sent letter requesting work plan by September 1, 2016 to superintendent of Yukon Flats school district. | Erin Gleason |
| 4/20/2017 | Document, Report, or Work plan Review - other | Characterization work plan review complete. ADEC request additions/changes to work plan, due May 15th 2017. | Erin Gleason |
| 5/3/2017 | Site Characterization Workplan Approved | Erin Gleason | |
| 3/27/2018 | Site Characterization Report Approved | Received combined report from Rodney Guritz at Arctic Data Services for Circle School Teacher Housing and Circle School Fuel Release on 3/7/2018. Report is now approved. | Erin Gleason |
| 6/6/2019 | Exposure Tracking Model Ranking | A new updated ranking with ETM has been completed for source area 72583 Former 500 gallon HOT. | Erin Gleason |
| 6/11/2019 | Cleanup Complete Determination Issued | Erin Gleason |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| DRO | < Method 2 Most Stringent | Soil | |
| DRO | < Table C | Groundwater | |
| Benzene | < Table C | SoilGroundwater |
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) |
| Hazard ID | Site Name | File Number |
|---|---|---|
| 4100 | Circle School Fuel Release | 160.38.002 |