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Site Report: Residence - Lot 2 Pleasure Island

Site Name: Residence - Lot 2 Pleasure Island
Address: Lot 2 Pleasure Island; Flat Lake; ~7 Miles W of City of Big Lake, Big Lake, AK 99652
File Number: 2202.38.012
Hazard ID: 25876
Status: Active
Staff: * Currently Not Assigned, 9072693057 bill.oconnell@alaska.gov
Latitude: 61.527822
Longitude: -150.014579
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

Adjacent to the seasonal residence on Lot 2, Pleasure Island (in the middle of Flat Lake) a 1,000-gallon home heating oil aboveground storage tank (AST) was installed over top of the location of a previously removed 500-gallon underground storage tank (UST). Over the winter and spring of 2011 a frost heave pushed the 2 X 4 tank frame into the pipe connections, snapping it in two, while the owner was away on vacation. On May 24, 2011 a neighbor smelled a strong odor of diesel and acted on the owners behalf digging an interception trench with a small back hoe on site as suggested by ADEC. In addition, ADEC 10 inch boom and absorbents were deployed at the shoreline to contain and collect fuel from Flat Lake. ADEC arrived on site 5/25/2011 observing an oil sheen in Flat Lake and a very strong smell of diesel in the air. The spill was located at the base of the hill and diesel was observed floating on top of the groundwater in the 3-4 foot deep trench. The interception trench worked well in collecting the majority of product and limiting contamination to Flat Lake. Spill volume is estimated at approximately 500 gallons. An estimated 200 gallons of product were removed from the interception trench and stored in the 500-gallon UST that had previously been removed. Alaska Soil Recycling (ASR) reported that 63.69 tons of contaminated dirt were removed from the site and transported to ASR for thermal treatment via super sacks by barge and semi trailer. The spill migrated under cement slab of the residential structure. Additional excavation was limited as to not jeopardize structural integrity of the house foundation, and the geological and ecological stability of the shoreline. Soil samples collected from eastern sidewall of the initial release (beneath residential structure) and base of excavation, exhibited elevated concentrations of diesel range organics (DRO), gasoline range organics (GRO), Benzene, 2-methylnaphthalene, and 1-methynaphthalene all above ADEC cleanup criteria method 2. Though no additonal sheening was observed upon completion of cleanup in the interception trenches or in Flat Lake, there is still a chance of additional seepage from under the residential structure during spring break up. On-site drinking water was tested and showed signs of hydrocarbons below ADEC cleanup levels. Periodic testing of the drinking water well should be performed to make sure ADEC cleanup levels are not exceeded. Verifying groundwater at the base of impacted area (at approximately 3 feet deep) should also be tested to limit additional seepage into Flat Lake.

Action Information

Action Date Action Description DEC Staff
5/18/2012 Spill Transferred from Prevention Preparedness and Response Program Spill transferred by PERP staff Mark Sielaff. Spill no. 11239914402; spill date = 5/24/11; substance = diesel; quantity = ~500 gallons; source = aboveground home heating oil tank. Mitzi Read
5/25/2012 Site Added to Database A new site has been added to the database Mitzi Read
5/31/2012 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 79289 name: Diesel Release From 1,000-Gal Home Heating Oil AST Mitzi Read
9/4/2012 Potentially Responsible Party/State Interest Letter Todd Blessing
2/11/2015 Update or Other Action Sent a letter to RP requesting an update and a work plan. Lisa Krebs-Barsis
4/29/2015 Potentially Responsible Party/State Interest Letter Lisa Krebs-Barsis
5/4/2015 Update or Other Action An Notice of Environmental Contamination was filed on the property. The NEC remains in effect until a written determination from ADEC is recorded that states that soil and groundwater at the site have been shown to meet the most stringent cleanup levels in 18 AAC 75 and that off-site transportation of soil is not a concern. Lisa Krebs-Barsis
4/11/2019 Update or Other Action "Suspended Site" informational reminder letter, referring to the 2015 recorded NEC, sent to the landowner/responsible party on this date. Mossy Mead
5/27/2022 Institutional Control Update E-mailed reminder NEC sent to responsible party. Arika Garcia

Contaminant Information

Name Level Description Media Comments

Control Type

Type Details

Requirements

Description Details

No associated sites were found.

Missing Location Data

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