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Site Report: King Salmon AS GW Zone 2 OT028

Site Name: King Salmon AS GW Zone 2 OT028
Address: Base Industrial Area, King Salmon, AK 99613
File Number: 2569.38.016
Hazard ID: 2629
Status: Active
Staff: Ginna Quesada, 9074515960 ginna.quesada@alaska.gov
Latitude: 58.690000
Longitude: -156.650000
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

OT028 Groundwater Zone 2 has DRO, GRO, BTEX, and TCE groundwater plumes in the A-Aquifer. The groundwater zones were established in areas with similar hydrological, geological, geographical, and contamination characteristics, and contain numerous Installation Restoration Program (IRP) sites within each zone. The IRP sites within Zone 2 include: DP013 Dry Well (Building #158); OT018 Pesticide Site; SS017 Waste Accumulation Area #3; SS020 Old Power Plan (Building #154); SS021 Refueler Shop (Building #149); SS022 Eskimo Creek Dump; DA033 Debris Trenches; SA043 Drum Storage; DA034 Gravel Pad; and SA039 Drum Storage . Potential contaminant sources identified in the vicinity are the Refueler Shop (former Building 149), several former USTs, and a former dry well. Groundwater Zone 2 Final Record of Decision was signed by ADEC in December 2002. The final remedy is Monitored Natural Attenuation, if long-term monitoring does not indicate that cleanup levels will be met within 25 years, or if actions levels are exceeded, then the need to implement an active remediation technique will be evaluated. The remedy includes: Institutional controls to restrict installation of drinking water wells within the A-Aquifer or other intrusive activities that would not be appropriate during remediation; annual groundwater and surface water monitoring with a five-year review; and groundwater monitoring every 5 years (2007, 2012, 2017, 2022). AF point of contact: Charley Peyton, Project Manager, 611th CES/CEV 10471 20th Street Suite 338, Elmendorf AFB, AK 99506-2270; Telephone 907-552-9765. Latitude and longitude coordinates represent the approximate GW Zone polygon centroid.

Action Information

Action Date Action Description DEC Staff
9/15/1985 Preliminary Assessment Approved Phase I - Records Search and site prioritization. Former Staff
6/15/1986 Update or Other Action Phase II - Task I Pre-Survey Report, Shemya Air Force Base and King Salmon Air Force Base. Former Staff
3/15/1992 Update or Other Action Report of Groundwater Monitoring Well Sampling and Analysis (dated July 31, 1992). Louis Howard
7/15/1992 Update or Other Action Remedial Investigation / Feasibility Study at Eleven Sites, final report (3 volumes, dated September 1993). 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
1/15/1993 Notice of Violation September 30, 1991 - Notice of Violation letter dated September 30, 1991 does not appear to be in ADEC files. Notice of Violation letter dated April 1, 1992 to Air Force 11 ACW/DE (Lt. Col. Patrick Coullahan) from ADEC (Richard Sundet, Environmental Specialist) regarding the March 4, 1992 Air Force letter in response to the September 30, 1991 ADEC Notice of Violation letter; RCRA inspection. ADEC letter dated January 15, 1993 stated that the Air Force had adequately addressed the September 30, 1991 NOV issued by the Department, and the NOV is closed. Louis Howard
9/1/1993 Update or Other Action (Old R:Base Action Code = FS - Feasibility Study (General)). Former Staff
12/15/1993 Update or Other Action King Salmon Air Station, Analytical Results: Private Water Wells (dated March 1, 1994). Louis Howard
3/31/1994 Site Ranked Using the AHRM Initial ranking. Louis Howard
4/26/1994 Update or Other Action Final Environmental Assessment Drawdown at King Salmon Airport (dated and received in April 1994). Gretchen Pikul
5/3/1994 Site Added to Database BTEX, GRO and TCE. TCE contamination in groundwater at 79 ug/l. Louis Howard
5/15/1994 Update or Other Action King Salmon Air Station, 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 Base-wide Groundwater Sampling Program. Louis Howard
7/15/1994 Update or Other Action Trip Report, Groundwater Monitoring Event, King Salmon Air Station, September - October (dated June 14, 1995). This program was designed to supplement previous RI/FS efforts and to complete the RI/FS process on selected sites. In June and July 1994, a groundwater sampling program was initiated in which groundwater sampling of a representative network of base-wide monitoring wells took place. Louis Howard
12/1/1994 Site Characterization Report Approved RI/FS conducted between October 1993 and December 1994. Louis Howard
5/8/1995 Notice of Violation January 14, 1994 - Notice of Violation letter to Air Force from ADEC dated January 14, 1994 regarding the June 1993 EPA/ADEC inspection (letter does not appear to be in the ADEC files). The Air Force response letter is dated February 8, 1994 and received by March 1, 1994. The Air Force response letter dated November 1, 1994 submitting information on the outstanding issues from the June 1990 and June 1993 Compliance Evaluation Inspections. The Air Force response letter dated December 12, 1994 submitting information on the outstanding issues from the June 1990 and June 1993 Compliance Evaluation Inspections. ADEC letter dated May 8, 1995 closed the NOV issued on January 14, 1994. ADEC and USAF letters dated October and November 1995 address closure on POL related Compliance Advisories issued by ADEC. 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
9/19/1995 Update or Other Action Record of Decision for Five Installation Restoration Program Sites at King Salmon Airport (dated June 1995), signed by ADEC on September 19, 1995, and signed by Air Force on May 27, 1999, received on June 8, 1999. Louis Howard
9/19/1995 Update or Other Action Long-term monitoring established for Groundwater Zone 2 conducted from 1992 - 2000 (excluding 1995) and will be officially documented in the 2002 Zone 2 Record of Decision for Final Remedial Action (draft dated September 2002) with annual long-term monitoring and a 5-year review. Louis Howard
9/19/1995 Update or Other Action DP13 has the status of no further remedial action planned. Groundwater contamination will continue to be evaluated as part of the Refueler Shop (SS21) / Groundwater Zone 2 monitoring program. Louis Howard
6/15/1996 Update or Other Action Final Human Food Chain, Aquatic Biota, and Wetlands Evaluation workplan. Louis Howard
6/15/1996 Update or Other Action Final Installation-wide Environmental Baseline Survey. Louis Howard
10/15/1996 Update or Other Action Final Field Report for Spring 1996, 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
12/6/1996 Update or Other Action Community Relations Plan for King Salmon Airport and Naknek Recreation Camps 1 and 2 (draft dated December 1996, final dated May 1997) Gretchen Pikul
1/15/1997 Update or Other Action Preliminary Report, Human Food Chain Evaluation. Gretchen Pikul
1/30/1997 Update or Other Action Final Human Health and Ecological Risk Assessments dated November 1996. Gretchen Pikul
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
5/6/1997 Update or Other Action Final Workplan Petroleum Contaminated Soil Stockpiles dated April 1997. Gretchen Pikul
7/31/1997 Update or Other Action Final Study to Evaluate Potential Leachate Generation from Petroleum Contaminated Soil 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
8/12/1997 Update or Other Action Final Eskimo Creek Dump and Landfill Number 3 Installation Restoration Program Remedial Investigation Report, DP13 probable source of TCE plume and potential source for DRO plume Gretchen Pikul
8/12/1997 Update or Other Action King Salmon Residential Well Sampling Report May 1997 Sampling Event (dated July 1997, received August 1997) Gretchen Pikul
9/29/1997 Update or Other Action Zones 2 and 4 Field Sampling Plan, Addendum to Groundwater Monitoring Zone 1 (to evaluate intrinsic remediation). Gretchen Pikul
9/29/1997 Update or Other Action Final Groundwater Monitoring Zones 2 and 4, Field Sampling Plan dated 9-9-97. 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
10/28/1997 Update or Other Action Underground Storage Tanks Approach for Remediation and Closure (dated December 11, 1995, received October 28, 1997) and accompanying documents. 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
4/27/1998 Update or Other Action King Salmon, Naknek and South Naknek Native Villages Site Assessment Report (draft dated March 1998, received April 1998, no final received). Gretchen Pikul
5/12/1998 Update or Other Action King Salmon Underground Storage Tanks Summary of UST Site Historical Information (final dated April 20, 1998, received May 1998). DP13 is a potential source contributing to DRO plume. Gretchen Pikul
6/10/1998 Update or Other Action Sampling and Analysis Plan and associated plans, Underground Storage Tank and Pipeline Monitoring (draft dated April 1998, final dated May 1998, received on June 10, 1998). Gretchen Pikul
7/15/1998 Update or Other Action ADEC Factsheet: Overview Environmental Cleanup at a Military Site in King Salmon, Alaska (dated July 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
10/15/1998 Update or Other Action Environmental Assessment SuperDARN Radar Installation, King Salmon Airport (draft dated October 1998, no final received). 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
3/15/1999 Update or Other Action Draft Implementation of Long-Term Groundwater Monitoring and Intrinsic Remediation Assessment of King Salmon Airport Groundwater Zones 2 and 4. Gretchen Pikul
3/30/1999 Meeting or Teleconference Held Seattle meeting with trustees on fish study previous results and workplan. Gretchen Pikul
6/8/1999 Update or Other Action Final Focused Aquatic Biota Sampling workplan dated May 1999. Gretchen Pikul
3/16/2000 Update or Other Action King Salmon Airport Restoration Advisory Board Orientation Manual (final dated April 1999 and received March 16, 2000). 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
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
4/25/2001 Meeting or Teleconference Held Meeting with Air Force, ADEC, and EPA at EPA Seattle office - April 23-25, 2001. 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
10/17/2001 Site Number Identifier Changed Changed the Workplan from X1 to X9 due to the presence of TCE above cleanup levels. Former Staff
10/23/2001 Update or Other Action Underground Storage Tank and Pipeline Monitoring Report (draft dated February 1999; ADEC comment letter dated May 14, 1999; review draft dated March 30, 2000; comment resolution meeting on April 11, 2000; final dated April 11, 2001 and received October 23, 2001). Gretchen Pikul
10/30/2001 Update or Other Action Institutional Controls for the Groundwater Zone (Zone 2) are in the process of being developed for the contaminated groundwater below this NFRAP site. The Record of Decision is being developed Fall 2001 and ICs will follow. ICs will be recorded in state/federal land records, and within the Air Force Base General Plan. 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
11/29/2001 Meeting or Teleconference Held Meeting with Air Force, ADEC, and EPA at EPA Seattle office - November 26-29, 2001. Gretchen Pikul
12/13/2001 Update or Other Action Work Plans for 2001 Comprehensive Environmental Monitoring Projects at: North and South Bluffs (Zone 3); Naknek River Storage Area (Zone 4); Rapids Camp (Zone 6); Biovent and AS/SVE Monitoring at 6 Remediation Sites (4 in Zone 2, 1 at RAPCON - FT01, and 1 at MOGAS - SS19); and Soil Biocell Number 7 Cleanup Verification - (drafts dated and received in July 2001; ADEC comment letters dated July 2001; ADEC approval letters dated July and August 2001; final dated November 28, 2001 and received on December 13, 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
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
7/17/2002 Meeting or Teleconference Held ADEC participated in the Phase II Remedial Process Optimization (RPO) meetings in King Salmon. 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
3/11/2003 Update or Other Action Remediation System Operation, Monitoring, and Maintenance Manual at Six Remediation Sites - draft dated February 22, 2002 and received March 21, 2002; ADEC comment letter dated April 15, 2002; final dated December 23, 2002 and received March 11, 2003. Gretchen Pikul
3/11/2003 Update or Other Action Technical Report – Remediation Systems 2001 Operation, Monitoring and Maintenance Biovent and AS/SVE Systems at Six Remediation Sites final dated December 20, 2002 and received on March 11, 2003. Also, Remediation System Operation, Monitoring, and Maintenance Manual at Six Remediation Sites; final dated December 23, 2002 and received on March 11, 2003. Gretchen Pikul
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
11/13/2003 Update or Other Action Monthly Status Reports for Bioventing Systems - August through November 2003 (dated November 13, 2003). Gretchen Pikul
12/4/2003 Meeting or Teleconference Held ADEC participated in a Zone 2 ROD meeting with Air Force 611th and Air Staff attorneys and 611th project manager regarding Air Staff comments before AF signs ROD; ADEC signed final ROD December 2002. Communications continued in August - December 2003 on an addendum to ROD. Gretchen Pikul
12/17/2003 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, signed by Air Force on December 12, 2003, and a addendum was signed by both agencies in December 2003. 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
1/14/2004 Meeting or Teleconference Held ADEC participated in a meeting with new Air Force project manager (Keith Barnack) on AOCs; programming for AOC PA/SI is slated for 2005. These AOCs were compiled from an extensive review of the Aerial Photographic Analysis (dated November 1996) prepared by EPA Region 10. Gretchen Pikul
1/16/2004 Update or Other Action December 2003 Monthly Status Report for Bioventing Systems (electronic version dated and received on January 16, 2004). Gretchen Pikul
2/4/2004 Meeting or Teleconference Held Meeting on Air Force compliance projects and actions needed to gain closure, including biovent systems, former marina, and former POL pipeline. Gretchen Pikul
2/27/2004 Update or Other Action February 2004 Monthly Status Report for Bioventing Systems (dated February 17, 2004 and received by ADEC via e-mail on February 27). Gretchen Pikul
4/1/2004 Update or Other Action Remediation Systems 2003 Operation, Monitoring and Maintenance at Six Remediation Sites Work Plan Addendum; 1st draft dated and received in July 2003; ADEC comment letter dated August 8, 2003; ADEC approval letter dated August 19, 2003; 2nd draft dated and received on January 9, 2004; ADEC comment letter dated February 13, 2004; Air Force Comment Response received March 31, 2004; and ADEC approval letter dated April 1, 2004. Gretchen Pikul
5/6/2004 Update or Other Action March 2004 Monthly Status Reports for Bioventing Systems at King Salmon Air Station (dated May 6, 2004). Gretchen Pikul
6/8/2004 Update or Other Action Fact Sheet for King Salmon Air Station Environmental Restoration Project; draft fact sheet received and ADEC comments sent on April 16; Air Force Comment Response received on May 25; final dated and received in June 2004. Gretchen Pikul
6/18/2004 Update or Other Action May and June 2004 Monthly Status Reports for Bioventing Systems (dated and received on June 18, 2004). Gretchen Pikul
6/21/2004 Update or Other Action Characterization and Remediation of POL-Contaminated Soil as the Former POL Pipeline and MWR Marina Work Plan; draft received May 21, 2004 with expedited review requested by Air Force; ADEC submitted comments via e-mail on May 27, 2004; comment resolution meeting on June 2, 2004; final dated June and received June 21. 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
7/22/2004 Update or Other Action Summer 2004 Environmental Newsletter received on July 22, 2004. Gretchen Pikul
8/9/2004 Update or Other Action 2004 Work Plan Addendums: 2004 Remediation Systems Operation, Monitoring, and Maintenance at Seven Remediation Sites; draft dated July 30 and received on August 5, 2004; ADEC comment letter/conditional approval letter dated August 9, 2004; Air Force Comment Response received August 26 and ADEC sent e-mail on August 27 stating that Comment Response is acceptable and referred to ADEC conditional approval letter dated August 9, 2004. Gretchen Pikul
8/10/2004 Update or Other Action 2004 Work Plan and Addendum: 2004 Field Sampling Plan Addendum; draft dated July 30 and received on August 3, 2004; ADEC comment letter dated August 10, 2004; AND 2004 Quality Assurance Project Plan; draft dated July 28, 2004 and received on August 3; ADEC approval letter dated August 9, 2004. Gretchen Pikul
9/13/2004 Update or Other Action King Salmon RPO Field Activities Update -Technical Memorandum, dated and received on September 13, 2004 via e-mail from Manish Joshi (Earth Tech). This memo presents a summary of the field activities completed in July/August 2004, and outlines the upcoming October 2004 field activities. Gretchen Pikul
9/23/2004 Update or Other Action Corrective Action Report, USAF King Salmon Airport Hazardous Substance Spill # 03269930801 (dated September 21, 2004) prepared by Chugach Support Services; received September 23, 2004; see June 22, 2004 e-mails for further details and coordination. Gretchen Pikul
9/23/2004 Update or Other Action ADEC received the Corrective Action Report, USAF King Salmon Airport Hazardous Substance Spill # 03269930801, prepared for ADEC, prepared by Chugach Support Services (dated September 21, 2004); see file e-mails in June 2004 for further 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
8/25/2005 Update or Other Action Technical Report Remediation Systems 2003 Operation, Monitoring, and Maintenance Bioventing Systems at Six Remediation Sites; final draft dated and received in February 2005; ADEC comment letter dated April 25; Response to Comments June 16; ADEC approval letter July 12; final dated August 5, 2005 received August 25. Jeff Norberg
8/31/2005 Update or Other Action Work Plan - Long-Term Monitoring for 2005 Groundwater Zone 2- OT028; draft dated June 30, 2005 received July 5; ADEC comment letter Aug 31; comment resolution meeting September 7; ADEC approval letter issued October 25, 2005. Jeff Norberg
10/17/2005 Update or Other Action Work Plan- Drinking Water Well Installation; draft dated October 2005 received October 5; ADEC CSP comment letter October 17; ADEC Drinking Water Program comments provided to Air Force separately. Jeff Norberg
10/20/2005 Update or Other Action Report - 2004 Long-Term Monitoring Base Industrial Area Groundwater Zone 2- OT028 and Eskimo Creek Dump - SS022); draft dated July 12, 2005 received July 18; ADEC comment letter October 10; Air Force Response to Comments received October 19; ADEC approval letter issued October 20. Jeff Norberg
10/25/2005 Update or Other Action Field Sampling Plan Addendum - 2005 Environmental Restoration Program; draft dated August 15, 2005 received August 18; ADEC comment letter September 1; comment resolution meeting held September 7; ADEC approval letter issued October 25. Jeff Norberg
10/25/2005 Update or Other Action Work Plan Addendum - Remediation Systems 2005 Operation, Monitoring, and Maintenance at Two Remediation Sites; draft dated July 21, 2005 received July 28; ADEC comment letter September 1; comment resolution meeting September 7; ADEC approval letter issued October 25, 2005. Jeff Norberg
10/25/2005 Update or Other Action Quality Assurance Project Plan; draft dated August 31 and received on September 1, 2005; ADEC comment letter dated September 6; response to comment resolution meeting held September 7; ADEC approval letter dated October 25, 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
10/3/2006 Update or Other Action First Five-Year Review – Groundwater Zones 1-4 and 6; draft dated October 2005 received November 8, 2005; ADEC comment letter dated December 7, 2005; revised draft dated January 2006 received January 31, 2006; ADEC comment letter dated July 6; Air Force Comment Response received on August 27; ADEC approval letter dated August 29; Final received October 3, 2006. Jeff Norberg
1/26/2007 Update or Other Action File number issued 2569.38.016. Aggie Blandford
6/13/2007 Update or Other Action Report - 2006 Long-Term Monitoring Base Industrial Area Groundwater Zone 2- OT028 and Eskimo Creek Dump - LF022); draft dated June 8, 2007 received June 13; Jeff Norberg
6/18/2007 Update or Other Action Report - 2005 Long-Term Monitoring Base Industrial Area Groundwater Zone 2- OT028 and Eskimo Creek Dump - SS022); draft dated July 19, 2005 received July 21; Final received June 15, 2007 Jeff Norberg
4/15/2008 Update or Other Action ADEC staff participated in a Restoration Advisory Board meeting at the King Salmon Air Station. Community members are encouraged to attend and view a presentation of the most recent sampling program where data is available. Main topics discussed were the TCE plume that is in Groundwater Zone 1 where a treatibility study is being conducted to see the possible influence of adding an enhanced in-situ bioremediation product that is engineered to break down chlorinated solvents. The other main topic discussed was the results from the basewide monitoring event at all of the Groundwater Zones from 2007. Jonathan Schick
4/17/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Jonathan Schick
10/22/2008 Document, Report, or Work plan Review - other ADEC recieved a copy of the Draft 2007 Comprehensive Environmental Monitoring Report covering Groundwater Zones 1, 2, 3, 4, and RAPCON and Red Fox Creek. It is dated October 2008 and is under review by the State. Jonathan Schick
7/28/2010 Update or Other Action ADEC staff recieved the draft versions of the 2009 Long-Term Monitoring Report for the Comprehensive Environmental Monitoring Program for basewide groundwater monitoring. The sample collection and analysis from groundwater, surfacewater and sediment samples from Groundwater Zones 1 through 5. Jonathan Schick
9/8/2010 Update or Other Action ADEC staff submitted comments to the USAF summarizing concerns and edits on the 2009 Comprehensive Environmental Monitoring Report. The report detailed sampling groundwater, surfacewater and sediment at the 5 main groundwater zones at King Salmon Air Station. ADEC's main concerns were regarding the high DRO levels in Groundwater Zone 1 which showed a substantial increase in concentration since the 2008 sampling event, and the differentiation between Remedial Action Objectives as called out in the Records of Decision for these sites and the established ADEC cleanup levels in 18 AAC 75. Jonathan Schick
12/1/2010 Exposure Tracking Model Ranking Initial ranking with ETM completed for source area id: 73605 name: POL Plumes in Groundwater Jonathan Schick
1/5/2011 Update or Other Action Contaminated Sites Staff recieved the Final Version of the Work Plans for Comprehensive Environemtnal Monitoring across all of the groundwater zones at King Salmon Air Station including RAPCON/Red Fox Creek. Surface water and sediment sampling was scheduled to be conducted in several of the areas of concern as well as the analysis of groundwater samples. The Work Plan is dated August 2010. Jonathan Schick
2/22/2011 Update or Other Action Contaminated Sites Staff recieved a Final Version of the 2009 COmprehensive ENvironmental Monitoring Report covering groundwater and surfacewater sampling from Zones 1 through 5 at King Salmon. Comments on the Draft version were addressed and incorporated in the Final Version. Jonathan Schick
3/31/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff recieved the Draft Report for Comprehensive Environemental Monitoring for all of the groundwater zone sites across King Salmon. The report details the collection and analysis of groundwater and surface water samples all over the King Salmon Airport footprint as related to numerous IRP sites. Jonathan Schick
4/14/2011 Update or Other Action Contaminated Sites Staff recieved a Draft Work Plan for Well Decommissioning and Repair at all of the Groundwater Zones at King Salmon. Jonathan Schick
5/9/2011 Update or Other Action Contaminated Sites Staff submitted a comment letter to the USAF regarding the Draft Work Plan for Monitoring Well Decommissioning and Repair at all of the Groundwater Zones in King Salmon. Our main concerns were regarding improving the protectiveness of the decontamination of the equipment between wells to prevent cross contamination. Also regarding the treatment and disposal of any investigation derived waste water including the water generated during the decontamination of equipment. Jonathan Schick
5/25/2011 Update or Other Action ADEC Contaminated Sites Staff recieved the Draft WOrk Plans for 2011 Comprehensive Environmental Monitoring Projects for Groundwater Zones 1 through 4 and inclding RAPCON and Red Fox Creek sites. Jonathan Schick
6/6/2011 Update or Other Action Contaminated Sites Staff submitted comments to the US Air Force Remedial Project Manager regarding the 2011 Work plans for Comprehensive Environmental Monitoring Projects for Groundwater Zones 1-4 and RAPCON and Red Fox Creek. Our concerns were regarding several drums that have been stored within the bioremediation cells and also the need for an Explanation of Significant Differences for the South Bluffs Treatment System. Jonathan Schick
6/23/2011 Update or Other Action Contaminated Sites Staff recieved the Final Version 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 Version 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
8/26/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff recieved a FInal version of the Monitoring Well Decommissioning and Repair Report for King Salmon. The report detailed the monitoring wells throughout the King Salmon area that were either decommissioned and removed, or repaired for future work. Jonathan Schick
11/3/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff submitted a comment letter to the Air Force's Remedial Project Manager with comments on the Draft 2010 Comprehensive Environmental Monitoring Projects. The comments were in regards to the need to complete Five-Year Reviews for several of the Groundwater Zones thus requiring a large scale review of the data from all of these sites from the past 5 years and beyond. Other comments were regarding the report's presentation of some histroic data and the concern about the exceedance of iron in the surface water at the South Bluffs Treatment facility. Jonathan Schick
11/3/2011 Document, Report, or Work plan Review - other Contamianted Sites Staff submitted comments to the US Air Force Remedial Project Manager on the Draft 2010 Comprehensive Environmental Monitoring Report. The report covered the groundwater and surface water sampling at each of the 5 groundwater zones at King Salmon Air Station. THe main issues with the report was the inconsistencies with the work plan regarding the number and location of wells to sample. Jonathan Schick
12/4/2011 Update or Other Action Contaminated Sites Staff recieved responses to our comments from November 3 and a revised Final Version of the 2010 Comprehensive Environmental Monitoring Report. The responses were not adequate and further review of the comments and the document are required. Jonathan Schick
12/4/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff recieved Responses to our comments on the Draft 2010 Comprehensive Environmental Monitoring Report for the 5 groundwater zones at King Salmon. The majority of the responses were acceptable but there were several technical issues that will still need to be resolved before the report can be finalized. Jonathan Schick
12/9/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff submitted a letter to the Air Force's Remedial Project manager with regards to the responses to our comments on the 2010 Comprehensive Environmental Monitoring Report. The responses did not address ADEC's concerns about the need for 5-Year Reviews for several of the sites, or our concern about the elevated levels of iron in the surface water at the South Bluffs Treatment Facility. Jonathan Schick
1/19/2012 Document, Report, or Work plan Review - other Contaminated Sites Staff recieved a revised version of the 2010 Comprehensive Environmental Monitoring Report. The revisions incorporated the requested amendments from the draft and the report should be finalized. Jonathan Schick
3/20/2012 Document, Report, or Work plan Review - other Contaminated Sites Staff recieved the Draft Work Plan for Preliminary Assessments/Site Inspections for Cape Newenham, Cape Lisburne, Indian Mountain, Tatalina LRRS, and King Salmon Air Station. Jonathan Schick
5/14/2012 Document, Report, or Work plan Review - other Contaminated Sites Staff recieved the Final versions of the Work Plan for Preliminary Assessments/Site Inspections for Cape Newenham, Cape Lisburne, Indian Mountain, Tatalina LRRS, and King Salmon Air Station. Jonathan Schick
5/24/2012 Document, Report, or Work plan Review - other Contaminated Sites Staff recieved the Final Version of the 2010 Comprehensive Environmental Monitoring Report dated May 2012 for King Salmon Air Station that covers the groundwater and surface water monitoring at each of the 5 groundwater zones at the Air Station. Jonathan Schick
12/9/2012 Document, Report, or Work plan Review - other Contaminated Sites Staff submitted a letter to the US Air Force Remedial Project Manager regarding the remaining technical issues with the Draft 2010 Comprehensive Environmental Monitoring Report. The issues should be amended before the report can be finalized. Jonathan Schick
9/4/2013 Document, Report, or Work plan Review - other Submit approval letter to US Air Force for "Final Work Plans 2013 Comprehensive Environmental Monitoring” King Salmon Airport, Alaska. The Final work plans identify the groundwater monitoring and Institutional Control monitoring requirements for Groundwater Zones 1, 2, 3, 4, 5, 6, and 7. Sampling is scheduled to begin this week. Sampling of 12 A-aquifer wells and surface water sampling of Eskimo Creek is included in the plan for Zone 2. Guy Warren
9/17/2013 Document, Report, or Work plan Review - other Submit approval letter to US Air Force for the Final 2012 Comprehensive Environmental Monitoring Report for King Salmon Airport. Project activities for Zone 2 included ground water and surface water sampling. Sample results were consistent with last year. Recommendations for Zone 2 include discontinuation of sampling at all seven well points and addition of IC inspections. Discontinuation of sampling is appropriate as sample results have not exceeded end point criteria since 2004. Guy Warren
3/20/2014 CERCLA ROD Periodic Review Received Final "Second Five Year Review for Groundwater Zones 2, 3, and 4". Four issues were identified for Zone 2. Issues will be addressed in upcoming CEM work plan. Guy Warren
7/10/2014 Update or Other Action Submit approval letter to US Air Force for the Final 2013 Comprehensive Environmental Monitoring Report for King Salmon Airport. Project activities for Zone 2 included ground water and surface water sampling for hydrocarbons and TCE. Sample results were consistent with previous years. No changes in monitoring recommended. IC inspections resulted in no observations of non-compliance. Guy Warren
8/28/2014 Document, Report, or Work plan Review - other Submit approval letter to US Air Force for "Final Work Plans 2014 Comprehensive Environmental Monitoring” King Salmon Airport, Alaska. The Final work plans identify the groundwater monitoring and Institutional Control monitoring requirements for Groundwater Zones 1, 2, 3, 4, 5, 6, and 7 as well as maintenance at the bio-cells. Sampling of 12 A-aquifer wells and surface water sampling of Eskimo Creek is included in the plan for Zone 2. Guy Warren
2/10/2016 Document, Report, or Work plan Review - other Submit approval letter for Final 2014 Long Term Monitoring Report for King Salmon Divert. Guy Warren
4/11/2016 Update or Other Action Submit approval letter for Final 2015 Long Term Monitoring Report for King Salmon Divert. Groundwater and surface water samples were collected from multiple locations and an IC inspection was conducted. Contaminant concentrations continue to exceed GRO cleanup levels in monitoring well B-02. Monitoring shall continue at this site. Guy Warren
2/17/2017 Update or Other Action Draft 2016 LTM Report received for review and comment. None of the wells exceeded RAOs for GRO, DRO, or TCE. As in previous years, B-02 had the highest concentration of GRO (9.5 mg/L), DRO (8.9 mg/L) and TCE (0.015 mg/L). 1,4-Dioxane was not detected in any of the samples. MW00-03 exceeded the proposed ADEC criteria for PFOA and PFOS at 0.41 µg/L and 0.56 µg/L, respectively. PFOA and PFOS were also detected in MW-628 but at concentrations below the proposed ADEC criteria. Surface water samples were collected from three locations along Eskimo Creek and analyzed for VOCs. TCE was not detected in any of the samples. As has been observed in previous years, the combined lines of evidence of stable to decreasing petroleum hydrocarbon plumes and changes in groundwater chemistry strongly support the occurrence of intrinsic bioremediation of the petroleum hydrocarbons at this site. Decreasing TCE concentration trends suggest that intrinsic remediation of this chlorinated compound has occurred and is occurring. Intrinsic remediation of petroleum and chlorinated hydrocarbons is expected to continue in Zone 2. An institutional control inspection was performed with no observations of IC noncompliance. B-02: 1,2,4-Trimethylbenzene exceeded the 15 ug/L cleanup level at 380 ug/L, ethylbenzene exceeded the cleanup level of 15 ug/L at 440 ug/L, naphthalene exceeded the cleanup level of 1.7 ug/L at 440 ug/L, total xylenes exceeded the cleanup level of 190 ug/L at 2,500 ug/L. MW-629: 1,2,4-Trimethylbenzene exceeded the 15 ug/L cleanup level at 110 ug/L, benzene exceeded the cleanup level of 4.6 ug/L at 47 ug/L, ethylbenzene exceeded the cleanup level of 15 ug/L at 550 ug/L, total xylenes exceeded the cleanup level of 190 ug/L at 1,570 ug/L MW00-03: Ethylbenzene exceeded the cleanup level of 15 ug/L at 160 ug/L, See site file for additional information. Louis Howard
3/13/2017 Update or Other Action Staff provided comments on the RA-O LTM Report. Section 3.1 Is there a report documenting the decommissioning of these monitoring wells? Documentation of well decommissioning should be provided to ADEC. Section 3.4.1.1 If well MW00-04 has been damaged and could not be sampled for multiple years the well should be evaluated to determine if: 1) the well can be repaired, 2) an alternative well is available for sampling, or 3) a replacement needs to be installed. This should also be identified in the Deviations section. An appendix should include a list of all wells requiring repair, decommissioning or replacement. Section 3.6 Recommend including the surface water protection well MW-202 in the annual sampling in place of well 708. No need to wait for the 5-year review. Please include a recommendation for sample frequency for the remaining monitoring well network for Zone 2. ADEC would be willing to accept every other year sampling for the remainder of the well network and surface water sediment sampling. See site file for additional information. Louis Howard
8/4/2017 Update or Other Action ADEC received a pre-Draft Remedial Action-Construction Naknek River Tidal Zone (Site SS012) Soil Excavation, Transport and Disposal, FT001 Work Plan ON 7/11/2017 and a response letter with comments table was sent out on 8/4/2017. The Work Plan proposed objectives 1) interceptor trench construction and soil treatment w ORC to remove the free product south of MW-57 at lower Naknek River site; 2) soil excavation up to 50 bcy from site SA039-DR16; 3) up to 15 drums sampling stored within the biocells and landfarm area, and offsite disposal; 4) gabion repairs along South Barrel Bluff. Linda (Qi) Liu
8/10/2017 Document, Report, or Work plan Review - other ADEC received a draft Work Plan, Field Sampling Plan & QAPP for 2017 Long Term Management at all seven groundwater zones at King Salmon Divert on 8/4/2017. Response letter with comments was sent out on 8/10/2017. Major work at GWZ2 includes: Sampling 11 A-Aquifer wells and 3 surface water samples from Eskimo Creek, and analysis for VOCs, EDB, 1,2,3-TCP, DRO, GRO, Alkalinity, Chloride, Nitrate, Nitrite, Fe, & Mn. Linda (Qi) Liu
9/5/2017 Update or Other Action ADEC received and approved final Work Plans, FSP and HSP for 2017 Long-term Management dated September 2017. Linda (Qi) Liu
10/24/2017 Cleanup Plan Approved ADEC received and approved final Work Plan for Remedial Action-Construction Naknek River Tidal Zone (Site SS012) Soil Excavation, Transport and Disposal, FT001 (dated September 2017). Linda (Qi) Liu
5/7/2018 CERCLA PA 'Final Preliminary Assessment Report for Perfluorinated Compounds, King Salmon Divert, March 2018'. The purpose of this PA Report is to identify locations at King Salmon Divert where PFAS may have been released into the environment based on AFFF use and storage and to provide an initial assessment of possible migration pathways and receptors. Areas recommended for further investigation include: FTA 1, FTA 2, FTA 4, Red Fox Creek, and Landfarm and Landfarm Holding Ponds. Areas recommended for initiation of SI include: Building 160, Former Building 152, Building 300, Spray Test Area, Building 617, and Eskimo Creek. Areas recommended for closure with no further investigation include: RAPCON of FTA 1, 1980 Fairchild C-119 Flying Boxcar Crash, 1985 Douglas DC-3 Crash, Buildings 150, 601, 603, and 647, Building 645, and Biocells. Sammi Castle
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
9/20/2018 Update or Other Action PFAS notification letter sent to King Salmon Air Station on this date. This letter advises the Air Force of ADEC's new technical memorandum, Action Levels for PFAS in Water and Guidance on Sampling Groundwater and Drinking Water. The tech memo establishes drinking water action levels for six PFAS compounds when detected in groundwater or surface water used for drinking. Future sampling must include results for all six UCMR3 compounds in accordance with this tech memo. Sammi Castle
10/3/2018 Document, Report, or Work plan Review - other ADEC approved the Final 2017 Long Term Management Report for the King Salmon Divert on this date. Zone 1 recommendations include continuation of monitoring with no changes. Petroleum hydrocarbons and TCE were detected above cleanup levels in groundwater in Zone 2; recommendations include continued monitoring and updating cleanup levels in next 5 Year Review. In Zone 3, low levels of TCE and benzene were detected in the March 2018 SBTS sample, and gabions in King Salmon Creek are being pulled out of alignment; recommendations include reducing sampling at the North and South Bluffs to once every five years. In Zone 4, petroleum hydrocarbons were detected above cleanup levels in the A-aquifer but below cleanup levels in the B-aquifer; recommended that monitoring should continue due to drinking water wells and other sensitive receptors lying downgradient of this site. Monitoring will continue in Zone 5 without changes. Inspections of the Rapids Camp and Landfill were conducted in Zone 6; there were no observations of noncompliance at the landfill. Two of eight wells in Zone 7 exceeded RAO for DRO; 2015 soil samples from three LF01 locations indicated DRO contaminated soil above cleanup levels - this should be excavated and treated. Sammi Castle
10/5/2018 Document, Report, or Work plan Review - other Remedial Action-Construction Biocell and Landfarm Disposal, Additional Action Proposal approved on this date. This action proposed that to reduce surface water ponding within the landfarm, PFAS impacted surface soil and berm material will be excavated and stored in a soil stockpile for the winter. Soil samples will be taken from native soil after excavation activities in order to characterize the extent of PFAS contamination. Sammi Castle
11/21/2018 Document, Report, or Work plan Review - other Approval letter sent for 2018 Remedial Action Operations & Land Use Control Inspections Work Plan. This work plan outlines annual monitoring to be conducted at the King Salmon Air Station during November-December 2018. Sammi Castle
3/29/2019 Document, Report, or Work plan Review - other ADEC received the Draft 2018 Remedial Action Operations & Land Use Control Inspections, dated March 2019. This report presents analytical and field data collected during the 2018 field season from six groundwater zones, and the institutional controls inspection at Groundwater Zone 6. ADEC submitted comments to the Air Force in a letter on April 19, 2019. Sammi Castle
4/29/2019 Document, Report, or Work plan Review - other ADEC received the Draft Uniform Federal Policy - Quality Assurance Project Plan for Site Inspections of Aqueous Film-Forming Foam Areas, dated April 2019. The purpose of the SI for King Salmon Divert is to evaluate whether a release of AFFF-derived PFAS has occurred to groundwater, soil (shallow and subsurface), surface water, and sediment as a result of historical AFFF use at 11 of the KSD AFFF areas: Building 160, Former Building 152, Building 300, Spray Test Area, Building 617, Eskimo Creek, Red Fox Creek, the Fire Training Areas (FT001, FT002, FT004), and the Former Landfarm and Holding Ponds. ADEC submitted comments on the draft work plan in a letter to the Air Force dated May 17, 2019. Sammi Castle
5/1/2019 Document, Report, or Work plan Review - other ADEC received the Draft Removal Report for Biocell and Landfarm Disposal, dated April 2019. This report describes the 2018 removal action of soil impacted with perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS), and petroleum hydrocarbons from the biocell and landarm area. A total of 4,700-cy of per- and polyfluoroalkyl substance impacted soil remains at the biocell and landfarm area, stored in three long-term stockpiles within the former landfarm area. Following excavation and soil sample results, PFOA/PFOS contaminated soil remains above cleanup levels in the sub-base below two of the remaining stockpiles (Sub-Base Stockpile and Naknek Backhaul Stockpile), as well as the western berm of the Naknek Backhaul stockpile. ADEC submitted comments on the draft report in a letter to the Air Force on June 11, 2019. Sammi Castle
6/4/2019 Document, Report, or Work plan Review - other ADEC received the draft Remedial Action-Construction Report, Naknek River Tidal Zone, dated May 2019. This report details the remediation activities conducted at the Naknek River Tidal Zone (SS012), South Barrel Bluff (LF005), and SA039-DR16 sites, and the sampling of drums containing waste from past remedial activities that were stored in the Biocell/Landfarm Staging Area (drum contents were from DA031, SA036, SA039, FT001, and unknown sources). ADEC submitted comments on the draft report in a letter to the Air Force dated July 10, 2019. Sammi Castle
7/10/2019 Document, Report, or Work plan Review - other ADEC approved the Final 2018 Remedial Action Operations & Land Use Control Inspections, dated May 2019, in a letter to the Air Force on this date. Sammi Castle
8/2/2019 Document, Report, or Work plan Review - other ADEC approved the Final Uniform Federal Policy - Quality Assurance Project Plan for Site Inspections of Aqueous Film-Forming Foam Areas, King Salmon Divert, dated July 2019, in a letter to the Air Force on this date. Sammi Castle
8/14/2019 Document, Report, or Work plan Review - other ADEC approved the Final Removal Report for Biocell and Landfarm Disposal, dated July 2019, in a letter on this date. Sammi Castle
9/10/2019 Document, Report, or Work plan Review - other ADEC received the Draft Work Plans, 2019-2022 Remedial Action Operations & Land Use Control Inspections, dated September 2019. ADEC submitted comments to the Air Force in a letter dated October 9, 2019. Sammi Castle
10/25/2019 Document, Report, or Work plan Review - other ADEC approved the Final Work Plans, 2019-2022 Remedial Action Operations & Land Use Control Inspections, dated October 2019, in a letter dated October 28, 2019. Sammi Castle
3/13/2020 Document, Report, or Work plan Review - other ADEC approved the Final Addendum to Final Project-Specific Quality Assurance Project Plan, Biocell, Landfarm, and Waste Disposal, dated March 2020, in a letter on this date. This work plan details the packaging and transportation of PFOA/PFOS and POL-contaminated soil from the former landfarm, decommissioning of Biocell 9, and the disposal of eight supersacks of spent granular activated carbon. Sammi Castle
6/22/2020 Document, Report, or Work plan Review - other ADEC approved the Final Site Inspection Report of Aqueous Film-Forming Foam Areas, dated June 2020, in a letter on this date. The purpose of this SI is to evaluate whether a release of AFFF-derived PFAS has occurred to soil, surface water, sediment, and groundwater as a result of historical AFFF use at the following 11 areas: Combat Alert Cell, Former Fire Station, Current Fire Station, Spray Test Area, Wastewater Treatment Plant, Eskimo Creek, Red Fox Creek, Fire Training Areas 1, 2, and 4, and the Former Landfarm and Holding Ponds. All areas investigated had PFAS at concentrations above screening levels in some media and will require additional investigation. Sammi Castle
7/29/2020 Document, Report, or Work plan Review - other ADEC approved the East Biocell and Site Restoration Work Plan Addendum, dated 28 July 2020, in a letter on this date. This work plan details the excavation, transportation, and disposal of up to 1,245 tons of POL-contaminated soil present in the East Biocell and site restoration of the former North, South, East Biocell areas and Biocell #9. Sammi Castle
8/28/2020 Document, Report, or Work plan Review - other The Final 2019 Remedial Action Operations & Land Use Control Inspections, dated August 2020, was approved by ADEC in a letter on this date. This report presents analytical and field data collected during the 2019 field season from seven groundwater zones at King Salmon Divert. Sammi Castle
9/9/2020 Document, Report, or Work plan Review - other ADEC approved the Final Work Plan Addendum, 2020 Remedial Action Operations & Land Use Control Inspections, dated September 2020, in a letter on this date. This work plan describes the field investigation/monitoring and reporting activities to be conducted in seven groundwater monitoring zones located at King Salmon Divert during the 2020 field season. Field activities include the sampling of groundwater, surface water, and sediment, and the visual inspections of land use/institutional controls and landfills. Sammi Castle
10/2/2020 Document, Report, or Work plan Review - other ADEC approved the Uniform Federal Policy-Quality Assurance Project Plan, Expanded Remedial Investigations: Groundwater Zones 2 (OT028) and 5 (OT031) and Source Area and Remedy Evaluation: Lower Naknek River Storage Area Site (SS012 Lower), dated September 2020, in a letter on this date. This QAPP addresses Aqueous Film Forming Foam investigations in Groundwater Zones 2 and 5, Vapor Intrusion investigation in Groundwater Zone 2, and source area and remedy evaluation at the Lower Naknek River Storage Area Site SS012 Lower. Sammi Castle
2/22/2021 Document, Report, or Work plan Review - other ADEC approved the Groundwater Zone 2 (OT028) - Expanded Remedial Investigation - Vapor Intrusion Work Plan, dated February 2021, in a letter on this date. This work plan describes the vapor intrusion pathway at Groundwater Zone 2. Buildings of interest recommended for investigation are Building 147, Building 158, and Building 300. The investigation approach incudes the completion of building surveys, subslab soil gas sampling, and indoor-to-subslab differential pressure monitoring. Sammi Castle
4/2/2021 Document, Report, or Work plan Review - other ADEC submitted comments on the Draft Groundwater Zones 1 and 2 Aqueous Film-Forming Foam Remedial Investigation Work Plan, dated March 2021, on a letter on this date. Sammi Castle
4/27/2021 CERCLA RI Plan Approved Final Groundwater Zones 1 and 2 Aqueous Film-Forming Foam Remedial Investigation Work Plan, April 2021 was approved. This Groundwater Zones 1 and 2 Aqueous Film-Forming Foam (AFFF) Remedial Investigation (RI) Work Plan (Work Plan) describes the conceptual site models (CSMs), data quality objectives (DQOs), and proposed sampling methodology and locations for conducting an AFFF RI at six Installation Restoration Program (IRP) sites located within Groundwater Zones 1 and 2, as well as additional investigation at Eskimo Creek, at King Salmon Divert (KSD), Alaska Darren Mulkey
6/8/2021 CERCLA Remedial Action Completion Report ADEC approved Final 2020 Remedial Action Operations & Land Use Control Inspections, Base Living Area (Zone 1), Base Industrial Area (Zone 2), North & South Bluffs & SBTS (Zone 3), Naknek River Storage Area (Zone 4), RAPCON & Red Fox Creek (Zone 5), Naknek Rec Camp I, Naknek Rec Camp II, King Salmon Divert, Alaska, dated June 2021. This report presents analytical and field data collected during the 2020 field season from five groundwater zones at King Salmon Divert, Alaska (KSD), Naknek Rec Camp I, and Naknek Rec Camp II. Darren Mulkey
8/23/2021 Document, Report, or Work plan Review - other The Final 2021 King Salmon Divert RAO LUC WP Addendum was reviewed and an approval letter was sent by ADEC. This 2021 Work Plan Addendum to the 2019 UFP-QAPP describes the field investigation/monitoring and reporting activities to be conducted during the 2021 Remedial Action Operations and Land Use Control Inspections under U. S. Army Corps of Engineers (USACE) Contract No. W911KB19C0015. Sites included in this workplan are: GWZ1, GWZ2, GWZ3, GWZ4, GWZ5, GWZ6, and GWZ7.In addition to sampling groundwater, surface water, and sediment, land use controls (LUCs) have been established to prevent exposure to contaminated media. LUC inspections for five groundwater zones, Naknek Rec Camp I, and Naknek Rec II will be conducted to ensure there have not been any unauthorized excavations or installation of drinking water wells in contaminated aquifers. Annual land fill inspections are also scheduled at the North and South Bluff in Zone 3, and the former landfills in Zone 4 and Zone 6. Additional work in Zone 3 will include barrier fence repair and the installation of signage. The installation and sampling of three groundwater monitoring wells at SA039-DR16 and the installation and sampling of two well points at LF022/SS022 are also included in this work plan. The results of this monitoring effort will be presented in a RA-O and LUC Inspections Report. An evaluation of the nature and extent of contamination with comparison to RAOs will be presented. Conclusions and recommendation based on the monitoring findings will be provided, as appropriate. Ginna Quesada
9/13/2021 Document, Report, or Work plan Review - other ADEC approved Final Work Plan MONITORING WELL INSTALLATION, REPAIR & DECOMMISSIONING for King Salmon Divert, ALASKA dated September 2021. Work will include repairing up to forty-five (45) wells, installing replacement or new monitoring wells at up to five (5) locations, decommissioning up to seventy (70) wells and monitoring points, and replacing well caps where needed in the following sites: GWZ1, GWZ2, GWZ3, GWZ4, GWZ5, and GWZ7. Ginna Quesada
6/30/2022 Risk Assessment Workplan Approved The ADEC approved the King Salmon Divert (Groundwater Zones 1, 2, and 5) and Naknek II Screening-Level Ecological Risk Assessment Work Plan, Final (dated June 2022). The work plan describes the approach to conduct a phased Screening-Level Ecological Risk Assessment across various sites within Naknek II and Groundwater Zones 1, 2, and 5 areas located in King Salmon, Alaska. The objectives of this work plan are to quantitatively and/or qualitatively evaluate baseline or existing exposure and risks to ecological receptors from chemicals released into the environment during site operations. The work plan aims to address a total of seventeen sites for contaminants such as metals, petroleum hydrocarbons, volatile organic compounds, semivolatile organic compounds, polychlorinated biphenyls, per- and polyfluoroalkyl substances, pesticides, dioxins and furans. Ginna Quesada
7/6/2022 Document, Report, or Work plan Review - other DEC reviewed the Draft Monitoring Well Installation, Repair, and Decommissioning Report, King Salmon Divert, Alaska, Dated May 2022. The report describes monitoring well installation, repair and decommissioning activities across various sites in Groundwater Zones 1, 2, 3, 4, 5 and Naknek II, located in King Salmon, Alaska. Activities included replacing a monitoring well (MW00-04R) and a well point (GP-1AR), the installation of three monitoring wells (SA039DR16-01, SA039DR16-02, and SA039DR16-03), and the repair and/or capping of 61 wells. Additionally, seventy- four wells were decommissioned. Ginna Quesada
7/18/2022 Document, Report, or Work plan Review - other ADEC reviewed and submitted comments for the Draft 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 June 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. The groundwater investigation at the SA039-DR16 site, located northwest of Groundwater Zone 2, found no groundwater exceedances of 18 AAC 75.345 Table C groundwater cleanup levels for diesel range organics, residual range organics, and polycyclic aromatic hydrocarbons and site closure was recommended for the site. The report included a 2022 work plan addendum for the upcoming field investigation, monitoring and reporting activities to be conducted during the 2022 remedial action operations and LUC inspections. The work plan addendum addressed the field sampling programs, analytical programs, and land use control inspections planned for each site in King Salmon, Alaska. Additionally, the work plan included a technical memorandum that described the repair process that will be used to manage the section of the South Barrel Bluff gabion wall that is slipping into King Salmon Creek. Ginna Quesada
8/1/2022 Document, Report, or Work plan Review - other ADEC reviewed and submitted comments regarding the King Salmon Airport, Combat Alert Apron PFAS Site Investigation Work Plan, Draft, dated June 2022. The work plan describes the procedures for field work and documentation associated with a perfluoroalkyl substances (PFAS) site investigation in the Combat Alert Apron situated within Groundwater Zone 2 in King Salmon, Alaska. This site investigation is intended to support the planned apron replacement and the overall goal is to determine the extent of PFAS contamination in soil beneath the asphalt and concrete. Ginna Quesada
8/2/2022 Document, Report, or Work plan Review - other ADEC reviewed and submitted comments regarding the Groundwater Zone 2 (OT028) –Expanded Remedial Investigation – Vapor Intrusion Report Draft, dated June 2022. The report describes the expanded remedial investigation (RI) activities conducted in February through July 2021 at Groundwater Zone 2 (OT028) located on King Salmon Divert, Alaska, and summarizes the data evaluation and risk assessment based on the RI and historical results. At Building 147, naphthalene was identified as a contaminant of concern COC in subslab soil gas for the current and future industrial and hypothetical future residential exposure scenarios. At Building 300, dichlorodifluoromethane was identified as a COC in subslab soil gas for the hypothetical future residential exposure scenarios. At Building 158, no COCs were identified in subslab soil gas. The report recommended further vapor intrustion (VI) sampling at Building 147, and potentially buildings 149, 151, 154, 155, 163, and 177, to determine if VI is resulting in unacceptable risk to the current/future commercial receptors. Ginna Quesada
8/17/2022 Document, Report, or Work plan Review - other ADEC submitted responses to comments received on August 15th 2022 regarding the Draft Monitoring Well Installation, Repair, and Decommissioning Report, King Salmon Divert, Alaska Dated May 2022. Approximately 6 cubic yards of soil cutting material was generated from the monitoring well activities. The approved work plan discussed the soil cutting material getting sampled and characterized prior to disposal, however this report noted historical results were used for characterizing the soil cutting material. Using historical results for characterizing investigative-derived waste is not appropriate, especially when the historical results are for petroleum only and the potentially contaminated media could have impacts from other analytes (per-and polyfluoroalkyl substances and pesticides for example). While the Transport, Treatment, & Disposal Approval forms were submitted retroactively, it is the department’s expectation that these forms be submitted to ADEC for approval prior to the transport and disposal of contaminated media. Per 18 AAC 75.370(b) “A responsible person, owner, or operator shall obtain approval before moving or disposing of soil subject to the site cleanup rules.” ADEC approval was not obtained prior to transporting the soil cutting material offsite. Ginna Quesada
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. The groundwater investigation at the SA039-DR16 source area, located northwest of Groundwater Zone 2, found no groundwater exceedances of 18 AAC 75.345 Table C groundwater cleanup levels for diesel range organics, residual range organics, and polycyclic aromatic hydrocarbons and site closure was recommended for the site. ADEC is tracking SA039-DR16 as a source area part of the King Salmon AS GWZ 2 SA039 (ADEC File No. 2569.38.016.10). Based on the available information, SA039-DR16 does not need further investigation at this time, and ADEC will consider the source area cleaned up. However the King Salmon AS GWZ 2 SA039 site will remain active on the database until all other source areas within SA039 are ready for closure. The report included a 2022 work plan addendum for the upcoming field investigation, monitoring and reporting activities to be conducted during the 2022 remedial action operations and LUC inspections. The work plan addendum addressed the field sampling programs, analytical programs, and land use control inspections planned for each site in King Salmon, Alaska. Additionally, the work plan included a technical memorandum that described the repair process that will be used to manage the section of the South Barrel Bluff gabion wall that is slipping into King Salmon Creek. Ginna Quesada
9/15/2022 Offsite Soil or Groundwater Disposal Approved ADEC approved the Contaminated Media Transport and Treatment or Disposal Approval Form for the disposal of 9 cubic feet of contaminated GAC sourced from Groundwater Zones 1, 2, and 4. The GAC contaminated with DRO, GRO, BTEX, TCE, and PFAS is being sent to U.S. Ecology in Anchorage to be disposed of at the Columbia Ridge Facility in Arlington Oregon. Two 5-gallon spent granular activated carbon (GAC) filters are being shipped off-site for disposal. One filter was used to filter purge and decon water from approximately 30 wells in 2021 and one filter will be used to do the same in September, 2022. Approximately 25% of those have contaminants present (mostly DRO and GRO). Approximately 6 to 8 wells have TCE with concentrations ranging 3 to 65 micrograms/liter and contribute 10 to 15 gallons of purge water. Each GAC will have treated approximately 60 gallons of water. Ginna Quesada
9/30/2022 Document, Report, or Work plan Review - other ADEC approved the Final Monitoring Well Installation, Repair, and Decommissioning Report, King Salmon Divert, Alaska dated August 2022. The report describes monitoring well installation, repair and decommissioning activities across various sites in Groundwater Zones 1, 2, 3, 4, 5 and Naknek II, located in King Salmon, Alaska. Activities included replacing a monitoring well (MW00-04R) and a well point (GP-1AR), the installation of three monitoring wells (SA039DR16-01, SA039DR16-02, and SA039DR16-03), and the repair and/or capping of 61 wells. Additionally, seventy- four wells were decommissioned. Ginna Quesada
10/21/2022 Document, Report, or Work plan Review - other ADEC approved the ADEC approval for the King Salmon Airport, Combat Alert Apron PFAS Site Investigation Work Plan, Final, dated October 2022. The work plan describes the procedures for field work and documentation associated with a perfluoroalkyl substances (PFAS) site investigation in the Combat Alert Apron situated within Groundwater Zone 2. This site investigation is intended to support the planned apron replacement and the overall goal is to determine the extent of PFAS contamination in soil beneath the asphalt and concrete. Ginna Quesada
11/7/2022 Compliance Advisory Letter ADEC issued compliance advisory letters to the USACE, USAF, and Jacobs to address violations of 18 AAC 75.325(i) and 18 AAC 75.370(b) by failing to obtain transport approval for investigation derived waste. Ginna Quesada
11/10/2022 Compliance Advisory Letter DEC issued compliance advisory letters to the U.S. Air Force, U.S. Army Corps of Engineers, and Paug-Vik Contractors LLC (PVC), to address violations of 18 AAC 75.325(i) and 18 AAC 75.370(b). On June 6, 2022, the U.S. Air Force (USAF) submitted two draft reports, Monitoring Well Installation, Repair, and Decommissioning Report (dated May 2022) and 2021 Remedial Action Operations & Land Use Control Inspections, SA039-DR16 Groundwater Investigation (dated June 2022). The draft reports were prepared by PVC,and described long-term monitoring and well repair activities at Groundwater Zones 1, 2, 3, 4, 5, 6, and 7 in King Salmon, Alaska. Both documents indicated soil cuttings and spent granulated activated carbon (GAC), used during the 2021 field season, were shipped offsite for disposal without DEC approval. Ginna Quesada
12/16/2022 Compliance Advisory Letter DEC accepted the U.S. Air Force, U.S. Corps of Engineers, and Jacobs responses to DEC’s compliance advisory letters sent out November 7, 2022. This issue is now closed. Ginna Quesada
12/19/2022 Compliance Advisory Letter DEC accepted the U.S. Air Force, U.S. Corps of Engineers, and Paug-Vik Contractors, LLC responses to DEC compliance advisory letters sent out November 10, 2022. This issue is now closed. Ginna Quesada
1/18/2023 Document, Report, or Work plan Review - other After numerous rounds of comments, ADEC approved the Groundwater Zone 2 (OT028) –Expanded Remedial Investigation – Vapor Intrusion Report Final, dated December 2022. Ginna Quesada
5/18/2023 Site Visit DEC conducted a site visit with the U.S. Air Force. Ginna Quesada
6/5/2023 Document, Report, or Work plan Review - other DEC reviewed and provided comments regarding the Draft 2022 Remedial Action Operations & Land Use Control Inspections, Base Living Area – Zone 1 (OT027), Base Industrial Area & LF022 – Zone 2 (OT028), North and South Bluffs – Zone 3 (OT029), Naknek River Storage Area – Zone 4 (OT030), RAPCON & Red Fox Creek – Zone 5 (OT031), Naknek Rec Camp I, Naknek Rec Camp II, King Salmon Divert, Alaska, dated May 2023. The report describes the field activities conducted during the 2022 field season and summarizes the analytical data. The report recommended continued monitoring and land use control inspections for all the sites. 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
10/27/2023 Document, Report, or Work plan Review - other DEC approved the Final 2023-2024 Remedial Action Operations & Land Use Control Inspections, Groundwater Zone 1 (Base Living Area) Groundwater Zone 2 (Base Industrial Area) Groundwater Zone 3 (North and South Bluffs) Groundwater Zone 4 (Naknek River Storage) Groundwater Zone 5 (RAPCON & Red Fox Creek) Groundwater Zone 6 (Naknek I) Groundwater Zone 7 (Naknek II) King Salmon Divert, Alaska, Dated October 2023.The work plan describes the planned field activities for the 2023 and 2024 field seasons at the Base Living Area (OT027), Base Industrial Area & LF022 (OT028), North and South Bluffs (OT029), Naknek River Storage Area (OT030), RAPCON & Red Fox Creek (OT031), Naknek Rec Camp I, and Naknek Rec Camp II sites located in King Salmon, Alaska. The planned scope of work includes land use inspections, free product recovery, and the continued monitoring of groundwater, surface water, and sediment. Ginna Quesada
2/22/2024 Document, Report, or Work plan Review - other DEC reviewed the Remedial Investigation Report: Phase I AFFF Remedial Investigation (Groundwater Zones 1 and 2 Sites FFS, STA, CAC, CFS, WTP, and LHP) and Expanded Remedial Investigation (Groundwater Zone 5 Sites FT001/FT001P, FT002/FT002P, and FT004/FT004P) Draft, dated January 2024. The report describes the phase I remedial investigation efforts to delineate the extent of per and polyfluoroalkyl substances (PFAS) across nine sites in groundwater zones 1, 2, and 5 located in King Salmon, Alaska. PFAS exceedances of screening levels were encountered across all sites in groundwater, soil, sediment, and surface water. The report recommends a supplemental remedial investigation to further examine the risk and further characterize the extent of contamination for all nine sites. Ginna Quesada
4/29/2024 Document, Report, or Work plan Review - other DEC reviewed the Uniform Federal Policy Quality Assurance Project Plan PFAS Supplemental Remedial Investigations for Groundwater Zones 2 And 5 And PFAS Phase I Remedial Investigation For Groundwater Zone 1 Draft, dated April 2024. The work plan describes the proposed remedial investigation efforts to delineate the extent of per and polyfluoroalkyl substances (PFAS) and trichloroethylene (TCE) related contamination in groundwater zones 2, and 5 located in King Salmon, Alaska. PFAS, TCE, and TCE daughter products will be sampled in groundwater, soil, sediment, and surface water. The results from the investigation will be used to assess if further remedial action is necessary to protect human health and the environment. Ginna Quesada
5/1/2024 Document, Report, or Work plan Review - other DEC approved the Remedial Investigation Report: Phase I AFFF Remedial Investigation (Groundwater Zones 1 and 2 Sites FFS, STA, CAC, CFS, WTP, and LHP) and Expanded Remedial Investigation (Groundwater Zone 5 Sites FT001/FT001P, FT002/FT002P, and FT004/FT004P) Final, dated April 2024. Ginna Quesada
5/17/2024 Document, Report, or Work plan Review - other DEC submitted responses to comments regarding the Uniform Federal Policy Quality Assurance Project Plan PFAS Supplemental Remedial Investigations for Groundwater Zones 2 And 5 And PFAS Phase I Remedial Investigation for Groundwater Zone 1 Draft, dated April 2024. Ginna Quesada
5/23/2024 Document, Report, or Work plan Review - other DEC approved the Uniform Federal Policy Quality Assurance Project Plan PFAS Supplemental Remedial Investigations for Groundwater Zones 2 And 5 And PFAS Phase I Remedial Investigation for Groundwater Zone 1 Final, dated May 2024. Ginna Quesada
8/23/2024 Document, Report, or Work plan Review - other DEC reviewed and provided comments regarding the Draft UFP-QAPP Work Plan Addendum 2024 Remedial Action Operations & Land Use Control Inspections, Groundwater Zone 1 (Base Living Area) Groundwater Zone 2 (Base Industrial Area) Groundwater Zone 3 (North and South Bluffs) Groundwater Zone 4 (Naknek River Storage) RAPCON & Red Fox Creek Naknek Recreational Camp I Naknek Recreational Camp II, King Salmon, Alaska, Dated August 2024. The work plan is an addendum to the Unified Federal Policy-Quality Assurance Project Plan (UFP-QAPP) Work Plan, 2023-2024 Remedial Action Operations & Land Use Control Inspections. It describes the planned field activities for the fall of 2024 field season in Groundwater Zones 1, 2, and 4 located in King Salmon, Alaska. The planned scope of work includes land use control inspections, free product recovery, the installation of new wells, and the continued monitoring of groundwater, surface water, and sediment in existing wells. Ginna Quesada
9/5/2024 Document, Report, or Work plan Review - other DEC reviewed the Draft Report 2023 Remedial Action Operations & Land Use Control Inspections Groundwater Zone 1 (Base Living Area) Groundwater Zone 2 (Base industrial Area) Groundwater Zone 3 (North & South Bluffs) Groundwater Zone 4 (Naknek River Storage) RAPCON & Red Fox Creek Naknek Recreational Camp I Naknek Recreational Camp II King Salmon, Alaska, Dated August 2024. The report describes the sampling results and field activities from the 2023 field season for the Base Living Area (OT027), Base Industrial Area & LF022 (OT028), North and South Bluffs (OT029), Naknek River Storage Area (OT030), RAPCON & Red Fox Creek (OT031), Naknek Rec Camp I, and Naknek Rec Camp II sites located in King Salmon, Alaska. The report recommended continued monitoring and land use control inspections for all the sites. Ginna Quesada
10/1/2024 Document, Report, or Work plan Review - other DEC approved the Final Report 2023 Remedial Action Operations & Land Use Control Inspections Groundwater Zone 1 (Base Living Area) Groundwater Zone 2 (Base industrial Area) Groundwater Zone 3 (North & South Bluffs) Groundwater Zone 4 (Naknek River Storage) RAPCON & Red Fox Creek Naknek Recreational Camp I Naknek Recreational Camp II, King Salmon, Alaska, Dated September 2024 and the Final UFP-QAPP Work Plan Addendum 2024 Remedial Action Operations & Land Use Control Inspections, Groundwater Zone 1 (Base Living Area) Groundwater Zone 2 (Base Industrial Area) Groundwater Zone 3 (North and South Bluffs) Groundwater Zone 4 (Naknek River Storage) RAPCON & Red Fox Creek Naknek Recreational Camp I Naknek Recreational Camp II, King Salmon, Alaska, dated September 2024. The report describes the sampling results and field activities from the 2023 field season for the Base Living Area (OT027), Base Industrial Area & LF022 (OT028), North and South Bluffs (OT029), Naknek River Storage Area (OT030), RAPCON & Red Fox Creek (OT031), Naknek Rec Camp I, and Naknek Rec Camp II sites located in King Salmon, Alaska. The report recommended continued monitoring and land use control inspections for all the sites. The report includes the Final Unified Federal Policy-Quality Assurance Project Plan (UFP-QAPP) Addendum for the 2024 remedial action operations and land use control inspections. The work plan is an addendum to the UFP-QAPP Work Plan, 2023-2024 Remedial Action Operations & Land Use Control Inspections. It describes the planned field activities for the fall of 2024 field season in Groundwater. Zones 1, 2, and 4 located in King Salmon, Alaska. The planned scope of work includes land use control inspections, free product recovery, the installation of new wells, and the continued monitoring of groundwater, surface water, and sediment in existing wells. Ginna Quesada
11/19/2024 Document, Report, or Work plan Review - other DEC submitted comments regarding the Site Characterization of Wastewater Lagoon Releases, Draft, dated October 2024. The report describes the investigation activities conducted in 2023 to characterize the nature and extent of contamination related to the wastewater lagoon releases adjacent to the wastewater treatment system at Groundwater Zone 1 (OT027) located in King Salmon, Alaska. A human health risk assessment and ecological risk assessment were included in this report. Samples were collected from groundwater, soil, sediment, and surface water and analyzed for petroleum fractions, metals, perfluoro alkylated substances (PFAS). polycyclic aromatic hydrocarbons (PAHs), volatile organic compounds (VOCs), and semi volatile organic compounds (SVOCs). Screening levels for the investigation were the November 2023 EPA Regional Screening Levels (RSLs) for residential soil (excess lifetime cancer risk of 1 × 10-6 and hazard quotient of 0.1) or 1/10 of the 2023 18 AAC 75 Method Two human health DEC cleanup levels. The risk assessment determined that diesel range organics and magnesium were contaminants of concern in groundwater at the site. Additionally, residual range organics exceeded DEC’s groundwater cleanup level. Various PFAS analytes were determined to be contaminants of potential concern in groundwater and soil. The report recommended the decommissioning of the wastewater treatment lagoons and proceeding with a supplementary investigation to address existing data gaps regarding PFAS contamination at the site along with supplementary human health and ecological risk assessments. Ginna Quesada

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State of Alaska Department of Environmental Conservation

P.O. Box 111800
Juneau, AK 99811-1800
Phone: 907-465-5066
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Physical Location: 410 Willoughby