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Site Report: Former School Tank Farm Gravel Pad - Selawik


Site Name: Former School Tank Farm Gravel Pad - Selawik
Address: ~600-800' West of River, Selawik, AK 99770
File Number: 500.38.003
Hazard ID: 1422
Status: Active
Staff: Janice Wiegers, 9074512127 janice.wiegers@alaska.gov
Latitude: 66.604442
Longitude: -160.012661
Horizontal Datum:WGS84

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

Historical discharges from tank farm to gravel pad. Tank farm consisted of 10 ASTs totaling 92,900 gallons capacity. The tanks were moved to a different location in 1998 during construction of a school addition. Site is 600-800' west of the Selawik River. GW reportedly not used in the village. All DW is taken from the Selawik River upstream of the community. No GW encountered to 315' during site investigations. Maximim active zone thickness ~30". Infiltration of SW is confined to the active layer during summer months.

Action Information

Action Date Action Description DEC Staff
4/30/1998 Site Added to Database Site added by staff. Douglas Bauer
4/30/1998 Site Ranked Using the AHRM Site ranked by staff. Too many unknowns(5), score = 0. Douglas Bauer
11/29/2006 Update or Other Action Staff transferred from Pikul to Jaynes. Aggie Blandford
11/15/2007 Update or Other Action NFRAP was prepared in 1998- does not appear to have ever been sent. Considering site for conditional closure- need to check status of site and ICs (cap). Neal Everson
11/15/2007 Exposure Tracking Model Ranking Intitial Ranking Complete for Source Area: 72400 (Autogenerated Action)
12/4/2007 Update or Other Action Phone conversation with Craig McConnel- head of facilities section for the NWSB- informed me that the cap was never installed. Property is not currently used for anything and is not a thoroughfare for students walking to new school addition. They will send pictures of the site. Neal Everson
3/9/2010 Update or Other Action Updated lattitude/longitude based on information in file. Janice Wiegers
3/18/2010 Update or Other Action Changed site name on file and in database to better reflect its identity as a school site. Site formerly known as "Selawik Tank Farm Gravel Pad." Sonja Benson
5/12/2011 Report or Workplan Review - Other DEC reviewed a draft Property Assessment and Cleanup Plan for Selawik area-wide. The Former School Tank Farm was included as one of the potential sites to be investigated. The former tank farm was used to store fuel for heating the former school, and was decommissioned for the 1996-1997 construction of the new Selawik School. Visual reconnaissance and sampling of the Former AVEC Facility were performed on October 2, 2010. Little surficial evidence remains of the Former School Tank Farm. The Davis-Ramoth School partially overlaps the northern boundary of the former tank farm. The new school is built on steel pilings. Four test pits were dug with a hand shovel to depths ranging from 1.2 to 2.2 feet. One test pit, SF1, was extended to 3.5 feet bgs, through water, using a hand auger. The test pits were advanced along the southern edge of the Davis-Ramoth School, and at least three locations were within the estimated containment area of the former tank farm. Water was encountered in each test pit at depths ranging 0.6 to 1.9 feet bgs. Clear polyethylene sheeting was encountered at approx. 2 feet bgs. Five analytical samples were collected from the test pits and analyzed for DRO and BTEX. One sample was also tested for PAHs. DRO was detected in each sample and ranged up to 6,450 mg/kg. All sample concentrations were below inhalation and ingestion cleanup levels. Deborah Williams

Contaminant Information

Name Level Description Media Comments

Control Type

Type Details

Requirements

Description Details

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