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Site Report: King Salmon AS GWZ 2 SS022 Eskimo Creek Dump

Site Name: King Salmon AS GWZ 2 SS022 Eskimo Creek Dump
Address: Commercial Drive, Groundwater Zone 2 (OT28), King Salmon, AK 99613
File Number: 2569.38.016.06
Hazard ID: 2837
Status: Active
Staff: Ginna Quesada, 9074515960 ginna.quesada@alaska.gov
Latitude: 58.687222
Longitude: -156.668889
Horizontal Datum:NAD27

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

Groundwater Zone 2 (OT28). Eskimo Creek Dump (SS22). The site is located west of Commercial Drive along a bluff overlooking Eskimo Creek. The dump area is located on both sides of Eskimo Creek and extends northeast from the intersection of Eskimo Creek and the Naknek Road for approximately 1,800 feet. Aerial photographs and visual observations indicate drums and other metallic debris were randomly scattered along the bluff at one time, although very little debris is currently visible. Low levels of TCE and several other contaminants have been detected in Eskimo Creek Dump monitoring. No contamination exceeding site applicable cleanup levels has been identified. Zone 2 is east of Eskimo Creek and the area is known as the base industrial area. Zone 2 consists of the following current sites: Old Power Plant (SS020), Refueler Shop Building 149 (SS021), Eskimo Creek Dump (SS022), Groundwater Zone 2 (OT028), Suspected Pesticide site (OT018), Dry Well site (DP013), Gravel Fill Pad and Disposal Area (DA034), Drum Storage Area 4 and Trench (SA043), 1-mile pipeline, and the biocells. A Record of Decision for Final Remedial Action (signed by ADEC in December 2002, and awaiting Air Force signature) records this site as requiring final cleanup action and NFRAP. The dump will be addressed by a vegetated soil cap with long-term monitoring. The final remedy for this site includes; removing surface debris, filling in surface depressions to facilitate surface water drainage and minimize ponding, revegetating the cap surface, implementing institutional controls, installing new monitoring wells, and annual long-term monioring with a 5-year review.

Action Information

Action Date Action Description DEC Staff
3/15/1992 Update or Other Action Report of Groundwater Monitoring Well Sampling and Analysis (dated July 31, 1992) Louis Howard
9/15/1992 Update or Other Action Comprehensive Site Investigation with September and October groundwater sampling programs Louis Howard
10/15/1992 Update or Other Action Report of Groundwater Monitoring Well Sampling and Analysis (dated July 1993) Louis Howard
10/15/1992 Update or Other Action Groundwater Monitoring Performed October 1992 (dated April 7, 1993) Louis Howard
12/15/1993 Update or Other Action Analytical Results: Private Water Wells (dated March 1, 1994). Louis Howard
5/15/1994 Update or Other Action Analytical Results: Private Water Wells verification sampling program. Louis Howard
6/15/1994 Risk Assessment Report Approved Human Health and Ecological Risk Assessment (dated June 1995). FTA #1 and Lower and Upper Naknek Seeps were the only areas which posed a threat to human health. The Ecological Risk Assessment results indicated that chemicals in soil and water posed threats to Eskimo Creek, Refueler Shop, WACs, North/South Bluffs, Upper/Lower Naknek Seeps, and FTA #1. Louis Howard
6/30/1994 Update or Other Action Basewide Groundwater Sampling Program Louis Howard
8/29/1995 Preliminary Assessment Approved Limited Field Investigation (dated June 1995). In the fall of 1993, the LFI was performed in conjunction with the ongoing RI/FS - the purpose of the LFI was to identify and evaluate 9 lower priority sites to assess possible environmental impacts. Louis Howard
8/29/1995 Update or Other Action Report, Installation Restoration Program, Remedial Investigation / Feasibility Study at 14 sites, Stage 3 Remedial Investigation studies conducted between October 1993 and December 1994 (final dated August 1995). Based on the results of the RI/FS and remedial actions completed prior to publication of the final RI/FS - the 2 Dry Wells, WACs, WAA#2, Road Oiling, and Landfill Number 2 sites did not require further investigation. Louis Howard
6/15/1996 Update or Other Action Final Installation-wide Environmental Baseline Survey. Louis Howard
6/15/1996 Update or Other Action Final Human Food Chain, Aquatic Biota, and Wetlands Evaluation workplan Louis Howard
6/15/1996 Site Characterization Workplan Approved Remedial Investigation / Feasibility Study Workplan for Eskimo Creek Dump (SS022) and Landfill Number 3 (LF007) Sites (draft dated March 1996, final dated June 1996). Louis Howard
10/15/1996 Update or Other Action Final Field Report for Spring 1996, Final Human Food Chain, Aquatic Biota, and Wetlands Evaluation report Louis Howard
11/15/1996 Update or Other Action Aerial Photographic Analysis, King Salmon Airport Study Area. Prepared by EPA Region 10, Research and Development, Characterization, Research Division, TS-PIC-9710003S, dated November 1996. Gretchen Pikul
1/15/1997 Update or Other Action Preliminary Report, Final Human Food Chain, Aquatic Biota, and Wetlands Evaluation Gretchen Pikul
1/28/1997 Update or Other Action Feasibility Study Eskimo Creek Product Recovery System (draft dated February 1996, final dated January 1999) Gretchen Pikul
2/12/1997 Site Added to Database Site added by Shannon and Wilson, Inc. S&W-Miner
2/12/1997 Update or Other Action (Old R:Base Action Code = SI - Site Investigation). SI action added 02/12/1997 by Shannon and Wilson, Inc., based on Air Force Relative Risk Evaluation Worksheet dated 9/7/95. S&W-Miner
3/15/1997 Update or Other Action Feasibility Report (final revised) - dated March 1997. Preferred alternatives were identified for groundwater, wetlands, and soil in each 5 groundwater monitoring zones associated with the main base. Gretchen Pikul
4/15/1997 Update or Other Action King Salmon Residential Well Sampling Report November 1996 Sampling Event (dated March 1997, received April 1997) Gretchen Pikul
5/6/1997 Update or Other Action Feasibility Study Screening Assessment (draft dated May 1997) Gretchen Pikul
7/15/1997 Site Characterization Report Approved Eskimo Creek Dump and Landfill Number 3 Remedial Investigation Report - ADEC comment letter dated 10-3-96, report finalized July 1997. Gretchen Pikul
8/5/1997 Update or Other Action Management Action Plan report (draft dated December 1996, received March 1997, final dated June 1997, received August 1997) Gretchen Pikul
10/23/1997 Update or Other Action Groundwater Monitoring Zones 2 and 4, Addendum to Workplan for Groundwater Monitoring Zone 1 (dated September 1997, received October 1997). Gretchen Pikul
3/25/1998 Update or Other Action Feasibility Study Report, Volume VIII (Addendum), Final (revised) dated March 1998. Specifically covers Groundwater Zone 2 (OT028). Gretchen Pikul
3/25/1998 Update or Other Action King Salmon Residential Well Sampling Report November 1997 Sampling Event (dated and received March 1998) Gretchen Pikul
9/4/1998 Update or Other Action King Salmon Residential Well Sampling, August 1997 Sampling Event, Analytical Results and Data Evaluation (dated March 1998, received September 1998) Gretchen Pikul
12/2/1998 Update or Other Action Human Food Chain, Aquatic Biota, and Wetlands Evaluations, Technical Report (Volume I - Report Text and Tables, Volume II - Maps, Figures and Photographs, and Volume III - Analytical Laboratory Reports) (draft dated July 1997, final dated November 1998) Gretchen Pikul
2/24/1999 Update or Other Action Tier II Ecological Risk Assessment for Piscivorous Wildlife Inhabiting Eskimo Creek report (draft dated November 1996, final dated May 1997, received on February 1999). Prepared by Armstrong Laboratory. Gretchen Pikul
3/22/1999 Update or Other Action 1997 Results - Intrinsic Remediation (Monitored Natural Attenuation) Study for Groundwater Zone 1, ADEC comment letter dated 3-22-99, report finalized July 1999 Gretchen Pikul
7/29/1999 Update or Other Action Eskimo Creek Site Assessment (aka downtown seep) dated July 1999. Prepared by Hart Crowser for ADEC - Project Manager Jim Frechione. Gretchen Pikul
8/19/1999 Update or Other Action Draft 1998 Results - Intrinsic Remediation (Monitored Natural Attenuation) Study for Groundwater Zone 1, ADEC comment letter dated 8-19-99 Gretchen Pikul
11/4/1999 Site Ranked Using the AHRM Initial ranking. Gretchen Pikul
12/10/1999 Update or Other Action Eskimo Creek Site Assessment (aka downtown seep) dated December 1999, prepared by Hart Crowser for ADEC Gretchen Pikul
7/21/2000 Update or Other Action Eskimo Creek Impact Study workplan (draft dated June and received June 19; ADEC comment letter dated June 23; final dated July 21 and received October 4) Gretchen Pikul
8/21/2000 Update or Other Action General Plan, 611th Air Support Group, Remote Alaska Sites, Volumes 1, 2, and 3 CD version only (dated March 2000 and received August 21). Portion of Bluffs IC established. Gretchen Pikul
10/4/2000 Update or Other Action Groundwater Zone 2 (OT028) 2000 Sampling and Feasibility Study workplan (draft dated June 2000, ADEC comment letter dated June 23, 2000, final dated July 21, 2000, received October 4, 2000) Gretchen Pikul
1/2/2001 Update or Other Action 2000 Limited Field Investigation at Eskimo Creek Treatment System Seeps report (draft dated December 2000) Gretchen Pikul
2/6/2001 Update or Other Action Implementation of Long-Term Groundwater Monitoring and Intrinsic Remediation Assessment of King Salmon Airport Groundwater Zones -2 and -4 (draft dated March 1999; ADEC comment letter dated June 4, 1999; final dated November 2000 and received on February 6, 2001). Gretchen Pikul
3/7/2001 Update or Other Action Groundwater Zone 2 (OT028) 2000 Sampling and Feasibility Study (dated January 18, 2001, ADEC comment letter dated March 7, 2001, no final report submitted yet) Gretchen Pikul
6/27/2001 Update or Other Action Photographic Journal 2000 Monitoring Program (draft dated December 2000, final dated May 2001 and received June 27, 2001) Gretchen Pikul
9/26/2001 Update or Other Action Restoration Advisory Board Pocket Guide and Community Outreach Handbook (ADEC comment letter dated May 30, 2001; final dated September 2001). Gretchen Pikul
10/16/2001 Update or Other Action Eskimo Creek Impact Study Report (draft dated December 2000; ADEC comment letter dated March 2, 2001; ADEC approval letter dated August 20, 2001; final dated October 16, 2001 - relatively minor comments were not addressed in final version). Gretchen Pikul
11/28/2001 Update or Other Action Remedial Process Optimization Scoping Visit Report - June 26-28, 2001 (no draft received; final received September 26, 2001 - many comments and issues to be resolved; comment resolution meeting during EPA Seattle meetings November 28, 2001). Gretchen Pikul
1/8/2002 Update or Other Action Management Action Plan (draft dated January 2001; ADEC comment letter dated April 3, 2001; response to comments received June 11, 2001; comment resolution meeting on August 29, 2001; final report dated October 2001 and received on January 8, 2002; not all comments documented within the response to comments as being addressed are addressed within the final report; discussions with the Air Force continue on this issue). Gretchen Pikul
4/15/2002 Update or Other Action Remediation Systems, 2001 Operation, Monitoring, and Maintenance, Biovent and AS/SVE Systems at Six Remediation Sites - draft dated March 12, 2002 and received March 21, 2002; ADEC comment letter dated April 15, 2002. Gretchen Pikul
5/1/2002 Proposed Plan Proposed Plan for Final Remedial Actions at the Base Industrial Area (Zone 2) ; draft received January 24, 2002; comment resolution meeting on February 21, 2002; draft final received March 13, 2002; public meeting on April 3 with Naknek Village Council and April 16, 2002 with RAB; public comment period April 1 to May 1, 2002. Gretchen Pikul
12/18/2002 Record of Decision The Record of Decision for Final Remedial Action at Groundwater Zone OT028 (Zone 2), Waste Accumulation Area 3 (SS017), Eskimo Creek Dump (SS022), Refueler Shop (SS021), and Old Power Plant Building (SS020) was signed by ADEC on December 18, 2002. The selected final remedies include: monitored natural attenuation of the TCE, BTEX, and GRO plumes with annual sampling, institutional controls on drinking water wells, and a 5-year review for OT028; site closure for SS017; vegetative soil cap, annual long-term monitoring (LTM), institutional controls on excavations and other subsurface activities, and 5-year review for SS022; and transfer to UST compliance section for continued operation of bioventing systems since contamination is associated with former state-regulated USTs, annual LTM, institutional controls of excavations and other subsurface activities, 5-year review, and confirmation soil samples to obtain site closure for SS021 and SS020. The 350 determination has been granted for the A-Aquifer, with application of the 10x rule for soil and groundwater. This approval has been given for similar facility sites (Zones 1 and 4) in recent years and documented in final, signed RODs. Gretchen Pikul
1/28/2003 GIS Position Updated Updated Quadrangle, Latitude, Longitude, Section, Township, and Range fields using TopoZone.com and site maps. Former Staff
7/3/2003 Update or Other Action 2002 King Salmon Air Station Monitoring Point Inventory CD (dated June 25 and received on July 3, 2003). Gretchen Pikul
7/20/2004 Update or Other Action Implementation of Remedial Process Optimization (RPO) Recommendations Work Plan; draft dated and received in June 2004; ADEC comment letter dated June 28, 2004; Comment Response on July 9; comment resolution meeting on July 19; final received on July 20 (some errors are present – see Comment Response in work plan jacket for details). Gretchen Pikul
11/15/2004 Meeting or Teleconference Held Remedial Process Optimization (RPO) team met with Air Force, ADEC, and EPA at at contractor's office in San Antonio TX - November 8-12, 2004. The primary purpose of this meeting was to evaluate the current status of cleanup efforts at the King Salmon AS and draft the RPO report due in March 2005. Jeff Norberg
6/16/2006 Update or Other Action Implementation of Remedial Process Optimization (RPO) Recommendations Report; draft dated March 2005 received March 30, 2005; ADEC comment letter dated May 16, 2005; Air Force Comment Response and ADEC approval letter issued on May 20, 2005; final dated June 2006 received on June 16, 2006. Jeff Norberg
1/26/2007 Update or Other Action File number issued 2569.38.016.06. Aggie Blandford
3/19/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Jonathan Schick
10/21/2008 Site Visit ADEC staff took part in a site visit to a number of pertinent sites at King Salmon Air Station over a 2 day visit. Sites, especially the pending Multi Site Inspection sites, were inspected for any visible evidence of contamination and potential sampling locations as the work plans are still being formulated. ADEC staff was accompanied to all of the sites by the Project managers from the USAF and thier contractors. A Restoration Advisory Board meeting was held during the site visit. The topics discussed included the most recent basewide monitoring program, a discussion of the Multi-SIte inspection project, an update on the status of the Groundwater Zone 5 Records of Decision, and a brief discussion concerning the TCE treatibility Study in Groundwater Zone 1. The next RAB meeting has been tentatively scheduled for April 21, 2009. Jonathan Schick
4/14/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff recieved the Draft Work Plan for Monitoring Well Decommissioning and Repair for all sites across the King Salmon Installation. Jonathan Schick
6/21/2011 Update or Other Action Contaminated Sites Staff recieved responses to our comments on the Draft Work Plan for Monitoring Well Decommissioning and Repair. The responses were acceptable and the plan should be approved to be implemented in the field. Jonathan Schick
6/23/2011 Update or Other Action Contaminated Sites Staff recieved the Final Versoin of the Work Plan for Monitoring Well Decommissioning and Repair for all sites across King Salmon Air Station. The Comments from the Draft Version of the Plan were addressed in the response to comments and in the Final Version of the document. Jonathan Schick
6/23/2011 Update or Other Action Contaminated Sites Staff recieved the Final Versoin of the Work Plan for Monitoring Well Decommissioning and Repair for all sites across King Salmon Air Station. The Comments from the Draft Version of the Plan were addressed in the response to comments and in the Final Version of the document. Jonathan Schick
6/23/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff submitted a letter to the AIr Force's Remedial Project Manager for King Salmon approving the Work Plan for Monitoring Well Decommissioning and Repair across the King Salmon Installation. The work is scheduled to be conducted in July of 2011. Jonathan Schick
8/26/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff recieved the Summary Report for Monitoring Well Decommissioning and Repair for King Salmon. The monitoring wells that were worked on during this program were located in all of the groundwater zones and at many of the individual sites at the installation. The report contained a short narrative, but mostly presented the outcome of the program through before and after photographs for each well location where work was performed. Jonathan Schick
8/29/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff submitted a letter to the AIr Force's Project Manager approving the final report for the Monitoring Well Decommissioning project. The report detailed the 2011 activites at the sites across many areas at King Salmon Air Station. Jonathan Schick
10/24/2014 Update or Other Action Ground water monitoring for this site is conducted as part of Ground water Zone 2. Please see that CS site listing for details. Guy Warren
10/31/2016 Update or Other Action ADEC sent a letter requesting additional action on nine sites within the King Salmon Divert. SS22 was included requesting clarification if the ROD remedy has been implemented and if not, why? Holly Weiss-Racine
5/15/2018 Document, Report, or Work plan Review - other ADEC approves the 'Final 2017 Five-Year Review, King Salmon Divert, Naknek Recreation Camp I, Naknek Recreation Camp II, Alaska, November 2017' in a letter dated May 15, 2018. Land Use Controls have not been fully implemented at any groundwater zones at King Salmon Divert. Recommendations include: finalizing the decision document for Zone 7, determine the extent of drinking water wells at Lake Camp (number of wells, depth of wells, and groundwater gradient), and fully implement LUCs by updating public land records for non-USAF owned properties. The next five-year review will be completed in 2022. Sammi Castle
3/11/2021 Update or Other Action ADEC sent a letter to the Air Force (dated March 11, 2021) requesting additional sampling at this site to determine current TCE contaminant concentrations in groundwater. RAOs listed in the ROD exceed the current regulatory cleanup levels in 18 AAC 75. As recommended in the 2017 Five-Year Review, the ROD for Groundwater Zone 2 should be updated to reflect current regulatory cleanup levels. Additionally, TCE concentrations at the Eskimo Creek Dump were in exceedance of the current regulatory cleanup levels at the time of monitoring well decommissioning. ADEC is therefore unable to evaluate this site for closure and requests additional sampling be conducted to determine current contaminant concentrations. Sammi Castle
9/8/2022 Document, Report, or Work plan Review - other ADEC approved the Final 2021 Remedial Action Operations & Land Use Control Inspections, Base Living Area - Zone 1 (OT027), Base Industrial Area & LF022 - Zone 2 (OT028), North & South Bluffs - Zone 3 (OT029), Naknek River Storage Area - Zone 4 (OT030), Rapcon & Red Fox Creek - Zone 5 (OT031), Naknek Rec Camp I (Rapids Camp), Naknek Rec Camp II (Lake Camp), SA039-DR16 Groundwater Investigation, King Salmon Divert, Alaska, dated August 2022. The report describes the land use control inspections, field data, and analytical results from groundwater and surface water sampling conducted during the 2021 field season for Groundwater Zones 1, 2, 3, 4, 5, Naknek Rec Camp I, and Naknek Rec Camp II in King Salmon, Alaska. Continued groundwater and surface water sampling and land use control (LUC) inspections were recommended for all sites. Ginna Quesada
5/18/2023 Site Visit DEC conducted a site visit with the U.S. Air Force. Ginna Quesada
8/24/2023 Document, Report, or Work plan Review - other DEC provided comments regarding the Draft Fourth Five-Year Review Sites OT027 (SS011, ST015); OT028 (LF022); OT029 (LF005, LF014); OT030 (LF008, SS012); Naknek Recreation Camp I – LF003 King Salmon Divert, Alaska Naknek Recreation Camp I, Alaska, Dated July 2023. This five-year review describes the selected remedies and the status of their implementation for Groundwater Zone 1 (OT027), Eskimo Creek Seeps (SS011), POL Tanks (ST015), Groundwater Zone 2 (OT028), Eskimo Creek Dump Site (LF022), Groundwater Zone 3 (OT029), South Bluff (LF005), North Bluff (LF014), Groundwater Zone 4 (OT030), Landfill No. 5 (LF008), Naknek River Storage Sites (SS012), and Groundwater Zone 6 Naknek Recreation Camp I (LF003) sites located in King Salmon, Alaska. The review focuses on identifying issues and providing recommendations for improving the performance of selected remedies that were recorded in the King Salmon Records of Decision (RODs). Protectiveness determinations were made for each site to identify the extent that each selected remedy is securing the protection of human health and the environment. Ginna Quesada

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State of Alaska Department of Environmental Conservation

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Phone: 907-465-5066
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