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Site Report: FAA Puntilla Lake Station

Site Name: FAA Puntilla Lake Station
Address: Puntilla Lake, Near Skwenta & Rainy Pass, Skwentna, AK 99667
File Number: 2248.38.001
Hazard ID: 1811
Status: Active
Staff: Jenny Gates, 9072628203 jenny.gates@alaska.gov
Latitude: 62.092194
Longitude: -152.733083
Horizontal Datum:

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

Elevated levels of DRO present at 3 aboveground tanks and along 400 foot fuel pipeline. Sediments of Puntilla Lake contaminated with DRO at 2,400 mg/kg. Tanks and pipeline were removed in 1999, however no contaminated soil was excavated. UVOST screening and soil sampling occurred in 2011. Significant soil contamination, DRO and RRO. Five MWs installed and sampled. MW-04 is highly contaminated. As of 01/2022, the soil contamination has not been delineated. Have read that Puntilla Lake is used as a drinking water source for the Rainy Pass Lodge as well as, there are two drinking water wells for the lodge. FAA will retain ownership of the land until cleanup is complete.

Action Information

Action Date Action Description DEC Staff
12/1/1993 Update or Other Action Environmental Compliance Investigation Report. Prepared by Ecology and Environment, Inc. Dated December 1993. 205 pages. (CS Database Updated 3/6/2018) Jamie McKellar
12/1/1999 Update or Other Action Tank and Pipeline Decomissioning Assessments, Puntilla Lake FAA Station. 163 pages. (CS Database Updated 3/6/2018) Jamie McKellar
1/1/2001 Update or Other Action Pre-field Planning Document, Release Investigation Plan, Fuel Storage Tank Management Program. Prepared by CH2-OH. Dated January 2001. (CS Database Updated 3/6/2018) Jamie McKellar
6/6/2002 Site Added to Database DRO. Elizabeth Stergiou
6/11/2002 Update or Other Action Project management transfered from Eileen Olson to Elizabeth Stergiou. Elizabeth Stergiou
5/21/2004 Site Number Identifier Changed Corrected Region from 31 to 22. Former Staff
8/22/2005 Update or Other Action Site File Reviewed: 3 Tanks (20-A-1, 20-A-2, and 20-A-3) and the fuel delivery pipeline were removed in 1999. Elevated levels of DRO are present at each tank area and along most of the pipeline. Additional characterization and petroleum contaminated soil removal is needed. Email sent to FAA. Anne Marie Palmieri
11/22/2005 Site Characterization Workplan Approved Site characterization workplan approved this date; will be implemented in FY06. Anne Marie Palmieri
8/1/2006 Update or Other Action Puntilla Lake Release Investigation Work Plan, Revision 1. Prepared by Bristol Construction Services. Dated August 2006. 70 pages. (CS Database Updated 3/6/2018) Jamie McKellar
8/1/2006 Update or Other Action Site characterization fieldwork is set to begin this month. Anne Marie Palmieri
2/1/2007 Update or Other Action Puntilla Lake Phase I Release Investigation Report Draft. Prepared by Bristol Construction Services, LLC. Dated February 2007. 196 pages. (CS Database Updated 3/6/2018) Jamie McKellar
4/13/2007 Exposure Tracking Model Ranking ETM ranking Anne Marie Palmieri
5/1/2010 Update or Other Action Puntilla Lake Phase 2 Release Investigation. Prepared by Bristol Construction Services, LLC. Dated May 2010. 251 pages. Jamie McKellar
6/22/2010 Site Characterization Workplan Approved Approved Phase 2 Release Investigation Work Plan to delineate the horizontal and vertical extent of petroleum contamitaion using Ultraviolet Optical Screening Tool (UVOST) with Laser-Induced Fluorescense (LIF) to provide real time field screening data, collecting soil samples for laboratory analysis, and installaing and sampling 5 monitoring wells to determine the presence of petroleum in the groundwater. Melody Debenham
5/14/2012 Document, Report, or Work plan Review - other Approved the Sampling and Analysis Plan describing the removal of lead-acid batteries near the Non Directional Beacon (NDB) area. An area approximately 20’ by 10’ contains broken lead-acid batteries, which will be removed and transported off site for disposal along with lead contaminated soil. Surface soil metals concentrations will be measured in the field using an x-ray fluorescence detector and confirmation samples will be collected for laboratory analysis. Melody Debenham
4/16/2013 Document, Report, or Work plan Review - other Received the final report documenting removal of lead-acid batteries and associated lead impacted soil at the Non Directional Beacon area. Broken lead-acid batteries and associated soil were removed from a 16’ by 17’ area and transported offsite for disposal. Field screening was performed using an x-ray fluorescence detector, and confirmation samples were collected for laboratory analysis. Confirmation sample results show lead contaminated soil remains onsite. The FAA will return to the site to perform additional removal actions. Melody Debenham
7/7/2014 Document, Report, or Work plan Review - other Approved final work plan for soil removal at lead battery area of concern and groundwater sampling at petroleum contamination area of concern. Field screening for lead will be performed with an x-ray fluorescence detector and confirmation samples will be collected and analyzed for lead once removal actions are complete. Groundwater at the petroleum contamination area of concern will be sampled for gasoline, diesel, and residual range organics and benzene, toluene, ethylbenzene, and xylenes. Melody Debenham
11/4/2014 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 79441 name: Battery Disposal Area near NDB Melody Debenham
11/10/2014 Document, Report, or Work plan Review - other Approved final 2014 Groundwater Monitoring and Soil Remediation Report. Groundwater sampling results shows DRO, GRO, and benzene remain above cleanup levels. Approximately 1.5 cubic feet of lead contaminated soil was removed from the battery disposal area and transported offsite for disposal. Confirmation sampling shows remaining concentrations of lead are below the cleanup level. Melody Debenham
6/10/2021 Document, Report, or Work plan Review - other Draft WP for 5 sites received. Comments sent 06/16/2021.Acceptance of RTC sent 06/25/2021. Approval letter for final WP sent 07/06/2021. Shonda Oderkirk
12/6/2021 Document, Report, or Work plan Review - other Draft Groundwater Monitoring for FAA Stations Bettles, Puntilla, Chena NDB. Report was supposed to include Yakataga and St. Mary's, but they weren't able to get out there due to COVID restrictions. 1/5/2022 Comments sent. DEC RTC sent 2/8/2022. 03/01/2022: received Final report copy. Approval letter sent 03/07/2022. Shonda Oderkirk
12/6/2021 Document, Report, or Work plan Review - other Draft Groundwater Monitoring for FAA Stations Bettles, Puntilla, Chena NDB. Report was supposed to include Yakataga and St. Mary's, but they weren't able to get out there due to COVID restrictions. 1/5/2022 Comments sent. DEC RTC sent 2/8/2022. 03/01/2022: received Final report copy. Approval letter sent 03/07/2022. Shonda Oderkirk

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State of Alaska Department of Environmental Conservation

P.O. Box 111800
Juneau, AK 99811-1800
Phone: 907-465-5066
Fax: 907-465-5245
TDD: 800-770-8973
Physical Location: 410 Willoughby