Site Report: King Salmon AS GW Zone 7 OT033 SS004 SS005

Site Name:	King Salmon AS GW Zone 7 OT033 SS004 SS005
Address:	Lake Camp GW Zone, aka Naknek Rec. Camp II, King Salmon, AK 99613
File Number:	2569.38.021
Hazard ID:	2614
Status:	Active
Staff:	Ginna Quesada, 9074515960 ginna.quesada@alaska.gov
Latitude:	58.670472
Longitude:	-156.458111
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.

Site Chronology
IC / Closure Details
Documents
Associated Sites

Problems/Comments

OT033 Groundwater Zone 7 has petroleum contaminated soil and groundwater; remediation and further investigation of the groundwater plume and the wetland adjacent to a drum disposal/landfill are planned. The contents of the drums are unknown. 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 7 include: DP003 Former Lodge Disposal Area; LF001 Landfill; SS005 Generator Pad; SS004 Vehicle Maintenance Area; and SS006 Wetland. A Proposed Plan was completed in 1999; a Record of Decision is planned for 2003. 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
6/15/1985	Preliminary Assessment Approved	Installation Restoration Program Preliminary Assessment - Naknek Recreation Camps (dated April 1989). Preliminary Assessment performed to identify past spill or disposal sites that posed potential and actual hazards, or both, to public health or the environment.	Former Staff
6/15/1987	Update or Other Action	Defense Environmental Restoration Account dated 1987. Field investigation performed to address debris material inventory, POL and hazardous material inventory, and disposal sites.	Former Staff
6/13/1988	Update or Other Action	Hazardous Materials Technical Center Assessment: recommends that construction rubble, drums and barrels be removed from site#1 landfill. Install monitoring well system and soil sampling should be done with contaminated soil removed. Site#2 removal of all drums is recommended along with previous suggestions for monitoring/sampling. Site#3 soil sampling of stained area is suggested as well as disposal/removal.	Former Staff
6/15/1990	Update or Other Action	Reconnaissance electromagnetic survey was conducted to search for buried drums, tanks, or other debris potentially buried on site, and to assist in chosing optimal drilling sites for soil borings and soil gas sample locations. The results of the soil gas survey were used to define areas of greatest potential environmental impact.	Former Staff
6/15/1991	Update or Other Action	Partial site assessment performed to determine the presence or absence of contaminants reportedly released to subsurface at locations identified in the preliminary assessment.	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
6/15/1995	Site Characterization Report Approved	Naknek Recreation Camps Remedial Investigation Report (final dated June 1995). Objective was to further define the extent of contamination in the subsurface. Two contamination sources were identified at Rapids Camp (former generator pad, and beach/dock area) and 4 contamination sources were identified at Lake Camp (former lodge area, former generator pad, wetland, and landfill).	Louis Howard
9/7/1995	Update or Other Action	(Old R:Base Action Code = RDRA - Remedial Design / Remedial Action). RDRA action added 02/12/1997 by Shannon and Wilson, Inc., based on Air Force Relative Risk Evaluation Worksheet dated 9/7/95. No other information available.	S&W-Miner
1/10/1996	Update or Other Action	Human Health and Ecological Risk Assessment Workplan for Naknek Recreation Camps (draft dated June 1995, received January 1996).	Louis Howard
7/15/1996	Update or Other Action	ADEC Factsheet: Overview Environmental Cleanup at a Military Site in King Salmon, Alaska (dated July 1998).	Gretchen Pikul
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
11/25/1996	Risk Assessment Report Approved	Baseline Human Health and Preliminary Ecological Risk Assessment, Naknek Recreation Camps (final dated November 1996). Results indicated some remediation is required at both sites due to contaminant concentrations exceeding risk-based standards and the potential harm to wildlife from exposure to DRO, DDT, and heavy metals.	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
2/12/1997	Site Added to Database	Site added by Shannon and Wilson, Inc. Petroleum hydrocarbons, metals, and potential waste oil contamination.	S&W-Miner
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
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	King Salmon Residential Well Sampling Report May 1997 Sampling Event (dated July 1997, received August 1997).	Gretchen Pikul
3/25/1998	Update or Other Action	Rapids Camp and Lake Camp Modeling to Support Remedial Alternatives (draft dated March 5, 1998, no final report received).	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
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
5/4/1999	Update or Other Action	Feasibility Study, Installation Restoration Program, Naknek Recreation Camps (draft dated October 1995, final revised dated March 1997, draft dated March 1998, final dated April 1999, final insert pages received 1-18-00).	Gretchen Pikul
10/14/1999	Site Ranked Using the AHRM	Initial ranking.	Gretchen Pikul
12/2/1999	Update or Other Action	Air Force memorandum regarding the Draft Proposed Plan Lake Camp (undated); ADEC received on December 1, 1999 and sent a response memorandum on December 2, 1999.	Gretchen Pikul
2/3/2000	Proposed Plan	Lake Camp (Groundwater Zone 7) Proposed Plan; comment period 2-4-00 to 3-3-00; public meeting 2-16-00.	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
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
8/31/2000	Update or Other Action	National Park Service letter regarding the Lake Camp Boat Launching and Day Use Facilities Environmental Assessment (dated August 29), with the attachment of a Finding of No Significant Impact (undated). And Final Wetlands Statement of Findings, Lake Camp Boat Launch and Day Use Facilities, Katmai National Park and Preserve (dated August 2000).	Gretchen Pikul
9/15/2000	Update or Other Action	Naknek Recreation Camp Lake Camp (SS05) Limited Field Investigation Workplan (draft dated June 7, 2000; ADEC comment letter dated June 14, 2000; final dated September 15, 2000).	Gretchen Pikul
9/26/2000	Update or Other Action	Lake Camp 95% Design Submittal Drawings from the National Park Service (letter dated September 25).	Gretchen Pikul
10/3/2000	Update or Other Action	Geotechnical Report, Lake Camp Facilities Design, Katmai National Park and Preserve, Alaska (dated January 2000 and received on October 3 from NPS by ADEC request).	Gretchen Pikul
2/6/2001	Update or Other Action	Intrinsic Remediation Study, Groundwater Monitoring Zones 6 and 7 (draft dated April 1999, received May 1999, final dated November 2000, received February 6, 2001).	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
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
10/12/2001	Update or Other Action	Limited Field Investigation at Naknek II - Lake Camp (SS05) report (draft dated January 5, 2001; ADEC comment letter dated February 23, 2001; comment resolution meeting on September 26, 2001; final report received on October 5, 2001 - numerous comments not incorporated into final version as stated in 'response to comments').	Gretchen Pikul
11/19/2001	Update or Other Action	Record of Decision for Naknek Recreation Camp (Lake Camp), Site: Groundwater Zone OT033 (Zone 7) (draft dated October 2001; ADEC commented on November 19, 2001; no final received - Air Force contractor let go and funding to complete the projects and reports is in progress).	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
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
7/17/2002	Meeting or Teleconference Held	ADEC participated in the Phase II Remedial Process Optimization (RPO) meetings in King Salmon.	Gretchen Pikul
4/18/2003	Update or Other Action	Record of Decision for Naknek Recreation Camp II (Lake Camp); preliminary draft received on March 4, 2003; comment resolution meeting on March 12 and 13, 2003; received Draft ROD on April 18, 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
4/14/2004	Update or Other Action	Rehabilitation and Realignment of Lake Camp Road plan received on February 11, 2004; options include realignment through IRP sites in Zone 5; 2nd version dated April 8, 2004 and received on April 12, 2004; ADEC comment letter dated April 14, 2004; meeting minute comments dated July 6, 2004.	Gretchen Pikul
5/3/2004	Update or Other Action	Record of Decision for Naknek Recreation Camp II (Lake Camp); preliminary draft received on March 4, 2003; comment resolution meeting on March 12 and 13, 2003; received draft ROD on April 18, 2003; ADEC comment letter dated May 27, 2003; ADEC sent e-mail on Air Force Comment Response on August 27, 2003; final draft received December 2, 2003 and ADEC comments dated December 4, 2003; 4th draft ROD received on April 12, 2004 via e-mail; comment resolution meeting on April 28 and May 3, 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
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
8/10/2004	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
9/27/2004	Update or Other Action	Record of Decision for Naknek Recreation Camp II (Lake Camp); preliminary draft received on March 4, 2003; comment resolution meeting on March 12 and 13, 2003; received draft ROD on April 18, 2003; ADEC comment letter dated May 27, 2003; ADEC sent e-mail on Air Force Comment Response on August 27, 2003; final draft received December 2, 2003 and ADEC comments dated December 4, 2003; 4th draft ROD received on April 12, 2004 via e-mail; comment resolution meeting on April 28 and May 3, 2004; 611th submitted draft final Lake Camp ROD to PACAF on June 1, 2004; PACAF submitted Lake Camp ROD to Air Staff on July 19, 2004; Air Staff/PACAF comments were received on August 25, 2004; comment resolution teleconference held on September 2; comment resolution meeting/teleconference held on September 27, finalizing ROD will be delayed until negotiations with the landowner are complete.	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 2569.38.021.	Melissa Burger
3/18/2008	Exposure Tracking Model Ranking	Initial ranking with ETM completed.	Jonathan Schick
4/15/2008	Site Visit	ADEC staff conducted a site visit to a large number of pertinent sites at King Salmon Air Station over a 3 day visit. Sites were inspected for any visible evidence of contamination and potential sampling locations. ADEC staff was accompanied to all of the sites by the Project managers from the USAF and thier contractors. A RAB meeting was held during the site visit.	Jonathan Schick
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
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
4/21/2009	Update or Other Action	ADEC staff conducted a site visit to pertinent sites at King Salmon Air Station over a 2 day visit. Sites were inspected for any visible evidence of contamination and to become more familiar with the layout and topography of the area. ADEC staff was accompanied to all of the sites by the Project manager 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 which is entering Phase II this summer, 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 October, 2009.	Jonathan Schick
10/26/2009	Site Visit	ADEC staff traveled to King Salmon with the new RPM for the King Salmon Air Station to tour the sites and look at the excavations that were completed during the 2009 field season. Several sites were inspected and overall the sites appeared to be secured with orange snow fencing and visqueen covering the stockpiles to prevent ponding and migration of contaminants. While in King Salmon staff attended and participated in a Restoration Advisory Board Meeting to meet with the public of King Salmon and discuss the results from the latest round of base-wide sampling and to discuss the progress of the excavations that were conducted during the summer.	Jonathan Schick
7/28/2010	Update or Other Action	Contaminated Sites Staff recieved a Draft version of the Report for Remedial Action Projects for LF006, FT004, OT010, Lake Camp and the Biocells.	Jonathan Schick
9/29/2010	Update or Other Action	Contaminated Sites Staff submitted a letter containing comments on the Draft Report for Remedial Action Projects for LF006, FT004, OT010, Lake Camp and the Biocells. The comments were regarding the use of propper Personal Protective Equipment at the PCB impacted sites and the inclusion of the Laboratory Data Review Checklist with the Final Report.	Jonathan Schick
10/20/2010	Update or Other Action	ADEC staff conducted a site visit to pertinent sites at King Salmon Air Station over a 2 day visit. Sites were inspected for any visible evidence of contamination and to observe some of the work that is being conducted to remove POL impacted soils and PCB impacted soils at OT010. ADEC staff was accompanied to all of the sites by the Project manager 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, remedial action cleanup programs, and management of the IDW and soil in the biocells set up to add oxygen to the soil matrix to aid the degradation of the petroleum hydrocarbons. The next RAB meeting is scheduled for April 2011.	Jonathan Schick
4/8/2011	Update or Other Action	Contaminated Sites Staff recieved the Final Version of the 2009 Remedial Action Projects Report for LF006, FT004, OT010, Lake Camp, and the Biocells. The report was dated March 2011 and the comments submitted in September 2010 were incorporated into the Final Report.	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
5/10/2011	Update or Other Action	Contaminated Sites Staff submitted an approval letter for the final version of the Report on the 2009 Remedial Action Projects for LF006, FT004, OT010, Lake Camp and the Biocells. ALl of the comments submitted were addressed and incorporated into the Final Report.	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. The plan includes sampling groundwater at seven locations in Zone 7.	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. The plan includes sampling at 8 monitoring wells and institutional control inspections in Zone 7.	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. Groundwater sampling was conducted and will continue at three site wells.	Guy Warren
4/11/2016	Update or Other Action	Submit approval letter for Final 2015 Long Term Monitoring Report for King Salmon Divert. Groundwater samples were collected from multiple locations and an IC inspection was conducted. Contaminant concentrations continue to exceed DRO cleanup levels in GP01. Monitoring shall continue at this site, however, sampling for nitrate/nitrite, sulfate, and ferrous iron will be discontinued.	Guy Warren
12/15/2016	Update or Other Action	The AF is currently preparing a ROD for Zone 7. The draft document is presently in USAF legal review and should be provided to ADEC in the near future.	Holly Weiss-Racine
2/17/2017	Update or Other Action	Draft RA Operations & LTM GW report received for review and comment. Monitoring wells GP01 and MW22 exceeded the RAO of 1.5 mg/L for DRO at 4.1 mg/L and 2.2 mg/L, respectively. These results are increases over last year’s results. Landfarm O & M: ponds. One of the last ponds sampled, Pond 6, has PFOA/PFOS above ADEC criteria. The water from this pond will be retreated and retested next year until it meets discharge criteria. The landfarm was divided into 6 decision units and multi-increment sampled at the beginning of September. Decision units 1, 2, 3, and 4 were above the ADEC cleanup level of 250 mg/kg for DRO (770 – 1,200 mg/kg). Decision units 3, 5, and 6 were above the ADEC proposed cleanup level for PFOA and PFOS. Overall, the results for DRO, PFOA, and PFOS have decreased since the 2015 MI sampling [the decrease in PFOS and PFOA are more than like due to dilution rather than any biodegradation or treatment]. Biocell Sampling: Water samples were collected from the north and south biocells in early October, and analyzed for PFOA/PFOS. Both sample results were well above the ADEC proposed cleanup level of 0.4 µg/L. The results from the north biocell were 120/22 µg/L, respectively, and the results from the south biocell were 36/100 µg/L, respectively. The north and south biocells were MI sampled in August. DRO results for the north biocell ranged from 2,100 - 2,700 mg/kg. The ADEC cleanup level for DRO is 250 mg/kg. PFOA and PFOS were also detected at 52-210 µg/kg and 140-240 µg/kg respectively. The ADEC proposed cleanup levels are 3.0 µg/kg and 1.7 µg/kg. DRO results for the south biocell were 1,200 mg/kg. The results for PFOA were 740-1,300 µg/kg and 880-1,400 µg/kg for PFOS. 16KSLF11: Benzo(a)pyrene Decision Unit 1 Primary had exceeded the 200 ug/kg Human health cleanup level at 210 ug/kg. Biocell MI results Biocell N DU2 1,2,4-Trimethylbenzene exceeded the 160 ug/kg MTGW cleanup level at 290 ug/kg and S DU1 at 220 ug/kg. See site file for additional information.	Louis Howard
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 GWZ7 includes: collecting 4 groundwater samples from SS004, 3 from SS005 & 1 from LF001, and analyzing for DRO, Alkalinity, Chloride, Sulfate, Nitrate, Nitrite, Fe, Mn & Methane.	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
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
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
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
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
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
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
8/17/2022	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
9/30/2022	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
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
12/12/2022	Document, Report, or Work plan Review - other	ADEC submitted comments for the Naknek II Expanded Remedial Investigation Report and Human Health and Screening Level Ecological Risk Assessment for Sites LF001, LF002, DP003, SS004, and SS005 Draft, dated October 2022. The report describes the expanded remedial investigation activities and risk assessment conducted during the 2021 field season for the Drum Landfill (LF001), Construction Debris Landfill (LF002), Former Lodge and Disposal Pit (DP003), Former Vehicle Maintenance Facility (SS004), Former Generator Pad (SS005) sites located in Naknek II in King Salmon, Alaska. The goal of the report was to identify target analytes and delineate the nature and extent of contamination. The field work included an aquifer assessment, soil, groundwater, and sediment sampling, geophysical investigations, and test pitting. The report recommended no further action for all sites.	Ginna Quesada
4/14/2023	Document, Report, or Work plan Review - other	DEC submitted responses to comments regarding the Naknek II Expanded Remedial Investigation Report and Human Health and Screening Level Ecological Risk Assessment for Sites LF001, LF002, DP003, SS004, and SS005 Draft, dated October 2022.	Ginna Quesada
5/18/2023	Site Visit	DEC conducted a site visit with the U.S. Air Force.	Ginna Quesada
6/22/2023	Document, Report, or Work plan Review - other	DEC approved the Naknek II Expanded Remedial Investigation Report and Human Health and Screening Level Ecological Risk Assessment for Sites LF001, LF002, DP003, SS004, and SS005 Final, dated May 2023. The report describes the expanded remedial investigation activities and risk assessment conducted during the 2021 field season for the Drum Landfill (LF001), Construction Debris Landfill (LF002), Former Lodge and Disposal Pit (DP003), Former Vehicle Maintenance Facility (SS004), Former Generator Pad (SS005) sites located in Naknek II in King Salmon, Alaska. The goal of the report was to identify target analytes and delineate the nature and extent of contamination. The field work included an aquifer assessment, soil, groundwater, and sediment sampling, geophysical investigations, and test pitting. The report recommended no further action under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) for all the sites with continued management under state regulations.	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
7/18/2024	Document, Report, or Work plan Review - other	DEC provided comments regarding the Record of Decision Naknek II Sites LF001, LF002, DP003, SS004, and SS005 Draft, dated June 2024. The record of decision proposes no further action under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) at the Drum Landfill (LF001), Construction Debris Landfill (LF002), Former Lodge and Disposal Pit (DP003), Former Vehicle Maintenance Facility (SS004), and Former Generator Pad (SS005) sites located in groundwater zone 7 in King Salmon, Alaska. The document proposes further work under state law to address remaining petroleum contamination at SS004 and SS005.	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

Action Date

Action

Description

DEC Staff

6/15/1985

Preliminary Assessment Approved

Installation Restoration Program Preliminary Assessment - Naknek Recreation Camps (dated April 1989). Preliminary Assessment performed to identify past spill or disposal sites that posed potential and actual hazards, or both, to public health or the environment.

Former Staff

6/15/1987

Update or Other Action

Defense Environmental Restoration Account dated 1987. Field investigation performed to address debris material inventory, POL and hazardous material inventory, and disposal sites.

Former Staff

6/13/1988

Update or Other Action

Hazardous Materials Technical Center Assessment: recommends that construction rubble, drums and barrels be removed from site#1 landfill. Install monitoring well system and soil sampling should be done with contaminated soil removed. Site#2 removal of all drums is recommended along with previous suggestions for monitoring/sampling. Site#3 soil sampling of stained area is suggested as well as disposal/removal.

Former Staff

6/15/1990

Update or Other Action

Reconnaissance electromagnetic survey was conducted to search for buried drums, tanks, or other debris potentially buried on site, and to assist in chosing optimal drilling sites for soil borings and soil gas sample locations. The results of the soil gas survey were used to define areas of greatest potential environmental impact.

Former Staff

6/15/1991

Update or Other Action

Partial site assessment performed to determine the presence or absence of contaminants reportedly released to subsurface at locations identified in the preliminary assessment.

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

6/15/1995

Site Characterization Report Approved

Naknek Recreation Camps Remedial Investigation Report (final dated June 1995). Objective was to further define the extent of contamination in the subsurface. Two contamination sources were identified at Rapids Camp (former generator pad, and beach/dock area) and 4 contamination sources were identified at Lake Camp (former lodge area, former generator pad, wetland, and landfill).

Louis Howard

9/7/1995

Update or Other Action

(Old R:Base Action Code = RDRA - Remedial Design / Remedial Action). RDRA action added 02/12/1997 by Shannon and Wilson, Inc., based on Air Force Relative Risk Evaluation Worksheet dated 9/7/95. No other information available.

S&W-Miner

1/10/1996

Update or Other Action

Human Health and Ecological Risk Assessment Workplan for Naknek Recreation Camps (draft dated June 1995, received January 1996).

Louis Howard

7/15/1996

Update or Other Action

ADEC Factsheet: Overview Environmental Cleanup at a Military Site in King Salmon, Alaska (dated July 1998).

Gretchen Pikul

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

11/25/1996

Risk Assessment Report Approved

Baseline Human Health and Preliminary Ecological Risk Assessment, Naknek Recreation Camps (final dated November 1996). Results indicated some remediation is required at both sites due to contaminant concentrations exceeding risk-based standards and the potential harm to wildlife from exposure to DRO, DDT, and heavy metals.

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

2/12/1997

Site Added to Database

Site added by Shannon and Wilson, Inc. Petroleum hydrocarbons, metals, and potential waste oil contamination.

S&W-Miner

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

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

King Salmon Residential Well Sampling Report May 1997 Sampling Event (dated July 1997, received August 1997).

Gretchen Pikul

3/25/1998

Update or Other Action

Rapids Camp and Lake Camp Modeling to Support Remedial Alternatives (draft dated March 5, 1998, no final report received).

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

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

5/4/1999

Update or Other Action

Feasibility Study, Installation Restoration Program, Naknek Recreation Camps (draft dated October 1995, final revised dated March 1997, draft dated March 1998, final dated April 1999, final insert pages received 1-18-00).

Gretchen Pikul

10/14/1999

Site Ranked Using the AHRM

Initial ranking.

Gretchen Pikul

12/2/1999

Update or Other Action

Air Force memorandum regarding the Draft Proposed Plan Lake Camp (undated); ADEC received on December 1, 1999 and sent a response memorandum on December 2, 1999.

Gretchen Pikul

2/3/2000

Proposed Plan

Lake Camp (Groundwater Zone 7) Proposed Plan; comment period 2-4-00 to 3-3-00; public meeting 2-16-00.

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

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

8/31/2000

Update or Other Action

National Park Service letter regarding the Lake Camp Boat Launching and Day Use Facilities Environmental Assessment (dated August 29), with the attachment of a Finding of No Significant Impact (undated). And Final Wetlands Statement of Findings, Lake Camp Boat Launch and Day Use Facilities, Katmai National Park and Preserve (dated August 2000).

Gretchen Pikul

9/15/2000

Update or Other Action

Naknek Recreation Camp Lake Camp (SS05) Limited Field Investigation Workplan (draft dated June 7, 2000; ADEC comment letter dated June 14, 2000; final dated September 15, 2000).

Gretchen Pikul

9/26/2000

Update or Other Action

Lake Camp 95% Design Submittal Drawings from the National Park Service (letter dated September 25).

Gretchen Pikul

10/3/2000

Update or Other Action

Geotechnical Report, Lake Camp Facilities Design, Katmai National Park and Preserve, Alaska (dated January 2000 and received on October 3 from NPS by ADEC request).

Gretchen Pikul

2/6/2001

Update or Other Action

Intrinsic Remediation Study, Groundwater Monitoring Zones 6 and 7 (draft dated April 1999, received May 1999, final dated November 2000, received February 6, 2001).

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

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

10/12/2001

Update or Other Action

Limited Field Investigation at Naknek II - Lake Camp (SS05) report (draft dated January 5, 2001; ADEC comment letter dated February 23, 2001; comment resolution meeting on September 26, 2001; final report received on October 5, 2001 - numerous comments not incorporated into final version as stated in 'response to comments').

Gretchen Pikul

11/19/2001

Update or Other Action

Record of Decision for Naknek Recreation Camp (Lake Camp), Site: Groundwater Zone OT033 (Zone 7) (draft dated October 2001; ADEC commented on November 19, 2001; no final received - Air Force contractor let go and funding to complete the projects and reports is in progress).

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

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

7/17/2002

Meeting or Teleconference Held

ADEC participated in the Phase II Remedial Process Optimization (RPO) meetings in King Salmon.

Gretchen Pikul

4/18/2003

Update or Other Action

Record of Decision for Naknek Recreation Camp II (Lake Camp); preliminary draft received on March 4, 2003; comment resolution meeting on March 12 and 13, 2003; received Draft ROD on April 18, 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

4/14/2004

Update or Other Action

Rehabilitation and Realignment of Lake Camp Road plan received on February 11, 2004; options include realignment through IRP sites in Zone 5; 2nd version dated April 8, 2004 and received on April 12, 2004; ADEC comment letter dated April 14, 2004; meeting minute comments dated July 6, 2004.

Gretchen Pikul

5/3/2004

Update or Other Action

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

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

8/10/2004

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

9/27/2004

Update or Other Action

Record of Decision for Naknek Recreation Camp II (Lake Camp); preliminary draft received on March 4, 2003; comment resolution meeting on March 12 and 13, 2003; received draft ROD on April 18, 2003; ADEC comment letter dated May 27, 2003; ADEC sent e-mail on Air Force Comment Response on August 27, 2003; final draft received December 2, 2003 and ADEC comments dated December 4, 2003; 4th draft ROD received on April 12, 2004 via e-mail; comment resolution meeting on April 28 and May 3, 2004; 611th submitted draft final Lake Camp ROD to PACAF on June 1, 2004; PACAF submitted Lake Camp ROD to Air Staff on July 19, 2004; Air Staff/PACAF comments were received on August 25, 2004; comment resolution teleconference held on September 2; comment resolution meeting/teleconference held on September 27, finalizing ROD will be delayed until negotiations with the landowner are complete.

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 2569.38.021.

Melissa Burger

3/18/2008

Exposure Tracking Model Ranking

Initial ranking with ETM completed.

Jonathan Schick

4/15/2008

Site Visit

ADEC staff conducted a site visit to a large number of pertinent sites at King Salmon Air Station over a 3 day visit. Sites were inspected for any visible evidence of contamination and potential sampling locations. ADEC staff was accompanied to all of the sites by the Project managers from the USAF and thier contractors. A RAB meeting was held during the site visit.

Jonathan Schick

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

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

4/21/2009

Update or Other Action

ADEC staff conducted a site visit to pertinent sites at King Salmon Air Station over a 2 day visit. Sites were inspected for any visible evidence of contamination and to become more familiar with the layout and topography of the area. ADEC staff was accompanied to all of the sites by the Project manager 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 which is entering Phase II this summer, 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 October, 2009.

Jonathan Schick

10/26/2009

Site Visit

ADEC staff traveled to King Salmon with the new RPM for the King Salmon Air Station to tour the sites and look at the excavations that were completed during the 2009 field season. Several sites were inspected and overall the sites appeared to be secured with orange snow fencing and visqueen covering the stockpiles to prevent ponding and migration of contaminants. While in King Salmon staff attended and participated in a Restoration Advisory Board Meeting to meet with the public of King Salmon and discuss the results from the latest round of base-wide sampling and to discuss the progress of the excavations that were conducted during the summer.

Jonathan Schick

7/28/2010

Update or Other Action

Contaminated Sites Staff recieved a Draft version of the Report for Remedial Action Projects for LF006, FT004, OT010, Lake Camp and the Biocells.

Jonathan Schick

9/29/2010

Update or Other Action

Contaminated Sites Staff submitted a letter containing comments on the Draft Report for Remedial Action Projects for LF006, FT004, OT010, Lake Camp and the Biocells. The comments were regarding the use of propper Personal Protective Equipment at the PCB impacted sites and the inclusion of the Laboratory Data Review Checklist with the Final Report.

Jonathan Schick

10/20/2010

Update or Other Action

ADEC staff conducted a site visit to pertinent sites at King Salmon Air Station over a 2 day visit. Sites were inspected for any visible evidence of contamination and to observe some of the work that is being conducted to remove POL impacted soils and PCB impacted soils at OT010. ADEC staff was accompanied to all of the sites by the Project manager 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, remedial action cleanup programs, and management of the IDW and soil in the biocells set up to add oxygen to the soil matrix to aid the degradation of the petroleum hydrocarbons. The next RAB meeting is scheduled for April 2011.

Jonathan Schick

4/8/2011

Update or Other Action

Contaminated Sites Staff recieved the Final Version of the 2009 Remedial Action Projects Report for LF006, FT004, OT010, Lake Camp, and the Biocells. The report was dated March 2011 and the comments submitted in September 2010 were incorporated into the Final Report.

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

5/10/2011

Update or Other Action

Contaminated Sites Staff submitted an approval letter for the final version of the Report on the 2009 Remedial Action Projects for LF006, FT004, OT010, Lake Camp and the Biocells. ALl of the comments submitted were addressed and incorporated into the Final Report.

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. The plan includes sampling groundwater at seven locations in Zone 7.

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. The plan includes sampling at 8 monitoring wells and institutional control inspections in Zone 7.

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. Groundwater sampling was conducted and will continue at three site wells.

Guy Warren

4/11/2016

Update or Other Action

Submit approval letter for Final 2015 Long Term Monitoring Report for King Salmon Divert. Groundwater samples were collected from multiple locations and an IC inspection was conducted. Contaminant concentrations continue to exceed DRO cleanup levels in GP01. Monitoring shall continue at this site, however, sampling for nitrate/nitrite, sulfate, and ferrous iron will be discontinued.

Guy Warren

12/15/2016

Update or Other Action

The AF is currently preparing a ROD for Zone 7. The draft document is presently in USAF legal review and should be provided to ADEC in the near future.

Holly Weiss-Racine

2/17/2017

Update or Other Action

Draft RA Operations & LTM GW report received for review and comment. Monitoring wells GP01 and MW22 exceeded the RAO of 1.5 mg/L for DRO at 4.1 mg/L and 2.2 mg/L, respectively. These results are increases over last year’s results. Landfarm O & M: ponds. One of the last ponds sampled, Pond 6, has PFOA/PFOS above ADEC criteria. The water from this pond will be retreated and retested next year until it meets discharge criteria. The landfarm was divided into 6 decision units and multi-increment sampled at the beginning of September. Decision units 1, 2, 3, and 4 were above the ADEC cleanup level of 250 mg/kg for DRO (770 – 1,200 mg/kg). Decision units 3, 5, and 6 were above the ADEC proposed cleanup level for PFOA and PFOS. Overall, the results for DRO, PFOA, and PFOS have decreased since the 2015 MI sampling [the decrease in PFOS and PFOA are more than like due to dilution rather than any biodegradation or treatment]. Biocell Sampling: Water samples were collected from the north and south biocells in early October, and analyzed for PFOA/PFOS. Both sample results were well above the ADEC proposed cleanup level of 0.4 µg/L. The results from the north biocell were 120/22 µg/L, respectively, and the results from the south biocell were 36/100 µg/L, respectively. The north and south biocells were MI sampled in August. DRO results for the north biocell ranged from 2,100 - 2,700 mg/kg. The ADEC cleanup level for DRO is 250 mg/kg. PFOA and PFOS were also detected at 52-210 µg/kg and 140-240 µg/kg respectively. The ADEC proposed cleanup levels are 3.0 µg/kg and 1.7 µg/kg. DRO results for the south biocell were 1,200 mg/kg. The results for PFOA were 740-1,300 µg/kg and 880-1,400 µg/kg for PFOS. 16KSLF11: Benzo(a)pyrene Decision Unit 1 Primary had exceeded the 200 ug/kg Human health cleanup level at 210 ug/kg. Biocell MI results Biocell N DU2 1,2,4-Trimethylbenzene exceeded the 160 ug/kg MTGW cleanup level at 290 ug/kg and S DU1 at 220 ug/kg. See site file for additional information.

Louis Howard

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 GWZ7 includes: collecting 4 groundwater samples from SS004, 3 from SS005 & 1 from LF001, and analyzing for DRO, Alkalinity, Chloride, Sulfate, Nitrate, Nitrite, Fe, Mn & Methane.

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

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

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

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

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

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

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

8/17/2022

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

9/30/2022

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

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

12/12/2022

Document, Report, or Work plan Review - other

ADEC submitted comments for the Naknek II Expanded Remedial Investigation Report and Human Health and Screening Level Ecological Risk Assessment for Sites LF001, LF002, DP003, SS004, and SS005 Draft, dated October 2022. The report describes the expanded remedial investigation activities and risk assessment conducted during the 2021 field season for the Drum Landfill (LF001), Construction Debris Landfill (LF002), Former Lodge and Disposal Pit (DP003), Former Vehicle Maintenance Facility (SS004), Former Generator Pad (SS005) sites located in Naknek II in King Salmon, Alaska. The goal of the report was to identify target analytes and delineate the nature and extent of contamination. The field work included an aquifer assessment, soil, groundwater, and sediment sampling, geophysical investigations, and test pitting. The report recommended no further action for all sites.

Ginna Quesada

4/14/2023

Document, Report, or Work plan Review - other

DEC submitted responses to comments regarding the Naknek II Expanded Remedial Investigation Report and Human Health and Screening Level Ecological Risk Assessment for Sites LF001, LF002, DP003, SS004, and SS005 Draft, dated October 2022.

Ginna Quesada

5/18/2023

Site Visit

DEC conducted a site visit with the U.S. Air Force.

Ginna Quesada

6/22/2023

Document, Report, or Work plan Review - other

DEC approved the Naknek II Expanded Remedial Investigation Report and Human Health and Screening Level Ecological Risk Assessment for Sites LF001, LF002, DP003, SS004, and SS005 Final, dated May 2023. The report describes the expanded remedial investigation activities and risk assessment conducted during the 2021 field season for the Drum Landfill (LF001), Construction Debris Landfill (LF002), Former Lodge and Disposal Pit (DP003), Former Vehicle Maintenance Facility (SS004), Former Generator Pad (SS005) sites located in Naknek II in King Salmon, Alaska. The goal of the report was to identify target analytes and delineate the nature and extent of contamination. The field work included an aquifer assessment, soil, groundwater, and sediment sampling, geophysical investigations, and test pitting. The report recommended no further action under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) for all the sites with continued management under state regulations.

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

7/18/2024

Document, Report, or Work plan Review - other

DEC provided comments regarding the Record of Decision Naknek II Sites LF001, LF002, DP003, SS004, and SS005 Draft, dated June 2024. The record of decision proposes no further action under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) at the Drum Landfill (LF001), Construction Debris Landfill (LF002), Former Lodge and Disposal Pit (DP003), Former Vehicle Maintenance Facility (SS004), and Former Generator Pad (SS005) sites located in groundwater zone 7 in King Salmon, Alaska. The document proposes further work under state law to address remaining petroleum contamination at SS004 and SS005.

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

Contaminant Information

Name

Level Description

Media

Comments

Control Type

Type

Details

Requirements

Description

Details

2021 Well Installation and Decommissioning Report

2017.11.01 Five Year Review

2019.05.01 Annual Monitoring Report

Site Summary

No associated sites were found.

Missing Location Data

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Alaska Department of Environmental Conservation

Site Report: King Salmon AS GW Zone 7 OT033 SS004 SS005

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

2021 Well Installation and Decommissioning Report

2017.11.01 Five Year Review

2019.05.01 Annual Monitoring Report

Site Summary

Missing Location Data

State of Alaska Department of Environmental Conservation