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Site Report: King Salmon AS GW Zone 1 OT027

Site Name: King Salmon AS GW Zone 1 OT027
Address: Base Living Area, King Salmon, AK 99613
File Number: 2569.38.015
Hazard ID: 2628
Status: Active
Staff: Ginna Quesada, 9074515960 ginna.quesada@alaska.gov
Latitude: 58.693694
Longitude: -156.670972
Horizontal Datum:

We make every effort to ensure the data presented here is accurate based on the best available information currently on file with DEC. It is therefore subject to change as new information becomes available. We recommend contacting the assigned project staff prior to making decisions based on this information.

Problems/Comments

OT027 Groundwater Zone 1 has a free product and dissolved DRO plume, with several smaller dissolved TCE plumes. Zone 1 is the main base living area. 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 1 include: DP023 Dry Well (Building #159) (Cleanup Complete); SS11 Eskimo Cr. Seeps, SS015 POL Tanks aka ST015 Petroleum Oil, and Lubricants Tanks; SS016 Waste Accumulation Area #2 (Cleanup Complete); and SS019 MOGAS Station, DA032 Incinerator, DA038 Disturbed Ground and the B-Aquifer. An Interim Record of Decision (dated November 2000) to remediate the free phase petroleum product and TCE groundwater plumes was signed by ADEC and the Air Force. The Interim ROD also included the continued operation, maintenance, and monitoring of the Eskimo Creek Treatment System, and groundwater use restrictions. Latitude and longitude coordinates represent the approximate GW Zone polygon centroid.

Action Information

Action Date Action Description DEC Staff
6/15/1981 Update or Other Action COE installed product recovery systems at Eskimo Creek to intercept and remove separate-phase petroleum product seeping into adjacent wetlands Former Staff
9/15/1985 Preliminary Assessment Approved Phase I - Records Search and Site Prioritization. Former Staff
6/15/1986 Update or Other Action Phase II - Task I Pre-Survey Report, Shemya Air Force Base and King Salmon Air Force Base. Former Staff
6/15/1987 Update or Other Action Installation Restoration Plan, King Salmon Air Station, Stage 1, Final Technical report (dated August 1989). Former Staff
3/15/1988 Update or Other Action Installation Restoration Plan, King Salmon Air Station, Stage 2, Final Draft Technical report (dated October 3, 1990). Former Staff
6/30/1989 Update or Other Action (Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). CH2M Hill stage 2 workplan to assess 4 sites: North and South Barrel Dump Sites; Naknek River; and Eskimo Creek seeps. Remedial investigation and feasibility study occur in parallel. Former Staff
6/30/1989 Update or Other Action (Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). CH2M Hill QA/QC plan for various King Salmon Airport sites; the sites include the Eskimo Creek oil seep, North Barrel Dump, Naknek River seep, and the South Barrel Dump. A total of 17 sites were addressed by this QA/QC plan. Former Staff
8/29/1989 Update or Other Action (Old R:Base Action Code = SI - Site Investigation). CH2M Hill site investigation. The airport was originally constructed in the early 1940s to support the war effort. The airport was turned over to the State of Alaska in 1959. The State continues to operate the site with the Air Force as the major tenant. A White Alice site was activated in 1957. It was deactivated in 1979 and replaced with an Alascom Satellite earth terminal. Only a small portion of the site is owned by the State. The majority is on military land. In 1980, 340 military personnel resided at King Salmon Airport. The north and south barrel dump site, Eskimo Creek Seep and Naknek River seep sites were tested for over 146 constituents of concern. Of these, 39 potential contaminants of concern were identified. High concentrations of TPH were identified in shallow wells and soils at this site. Floating product (>1 foot) was identified at the Eskimo Creek Seepage Site. Lead and petroleum hydrocarbon contamination levels at this site pose a threat to fish and wildlife (page 126). No immediate environmental threat was identified at the Naknek River Seep (page 126). Both the north and south dump sites could pose a threat to fauna since the detection limits used in analyses were greater than the chronic aquatic organism toxicity. Remediation, based on stage 2 sampling, at both barrel dump sites could include: no action; restricting site access; preventing the migration of contaminants. Containment preferred remediation route. The Naknek River and Eskimo Creek seeps will receive further sampling to identify a specific remediation response. In general, based on further sampling results, the alternatives are: no action, which will not occur based on preliminary site investigation; recovery of floating product; treatment of shallow groundwater; excavation of contaminated soils; restrict site access; containment. Former Staff
10/17/1989 Notice of Violation Notice of Violation letter (although not titled such in subject line) to 5071 CSS/CC Air Force (Lt. Colonel Beil) from ADEC (Bruce Erickson, Anchorage/Western District Office Supervisor) regarding the unreported and unapproved oil / water separator removal resulting in oil seeping unreported into the wetlands of Eskimo Creek. Former Staff
10/3/1990 Update or Other Action (Old R:Base Action Code = MS - Monitoring/Sampling). CH2MHILL Stage 2 IRP investigation report lists groundwater contaminated with: benzene at 1-23 ug/l, trichloroethene from 2-90 ug/l, naphthalene from 62-12,000 ug/l, 2-methylnaphthalene from 20-18,000 ug/l. Soil samples had: TPH from 4.2-47,700 mg/kg, lab analysis of soil obtained from installation of monitoring wells had TPH from 31.2-10,300 mg/kg, naphthalene detected at 8.86 and 37 mg/kg, 2-methylnaphthalene at 16-73 mg/kg. Extent of contamination at Eskimo Creek places it as the highest priority site for remediation, since this site is considered to pose the highest risk to human health and the environment. Former Staff
10/3/1990 Update or Other Action (Old R:Base Action Code = SI - Site Investigation). CH2M HILL Final Draft Technical report under USAF contract # F33615-85-D-4535, Delivery Order # 012 sent to ADEC. This report only deals with 2 areas (Eskimo Creek and Naknek River) out of 4 past hazardous waste disposal and spill sites previously prioritized and grouped (stage 1). Naknek R. = Lower and Upper Naknek because of different contamination sources at each area along with a difference in the type and amount of contaminants of concern. In the Upper Naknek 2 plumes encompass 7,000 cubic yards and 9,000 cubic yards of contaminated soil above 100 ppm TPH at a depth of 3 to 5 '. Groundwater at 1 of 7 wells revealed aromatics of 12 ug/l benzene. Lower Naknek also consists of 2 distinct plumes of TPH to a depth of 3' The material at each plume above 100 ppm estimated to be 2,200 cubic yards and 3,300 cubic yards. Low levels of aromatics were detected in 2 wells below MCLs. Trichlorethane was detected in MW-57 at 120 ug/l exceeding MCL of 5 ug/l. Eskimo creek had 3 wells MW-22B, MW-28 and MW-38 exceed MCL for benzene (5 ug/l) 56, 23, and 8 ug/l respectively. 5 wells exceeded the MCL of 5 ug/l for trichlorethane MW-31, MW-47, MW-38, MW-30, MW-34 (18, 64, 26, 90, 29 ug/l respectively). 8 wells had naphthalene and methylnaphthalene ranging from 20 to 18,000 ug/l. Soil boring and hand auger soil samples revealed TPH from 4.2 ppm to 47,7000 ppm to depths to 20'. Various recommended remedial actions were presented for the 3 sites with all measures requiring monitoring for a minimum of 3 years to assess site conditions and the need for technical modifications to the selected remedial measures. Former Staff
12/27/1991 Site Added to Database Petroleum, chlorinated solvents, metals, naphthalene contaminants. Louis Howard
3/15/1992 Update or Other Action Report of Groundwater Monitoring Well Sampling and Analysis (dated July 31, 1992). Louis Howard
7/15/1992 Update or Other Action Remedial Investigation / Feasibility Study at Eleven Sites, final report (3 volumes, dated September 1993). Louis Howard
8/6/1992 Notice of Violation August 6, 1992 - Notice of Violation letter dated August 12, 1992 to 643 SPTS/CC Air Force (Lt. Col. Jimmy Harris) from ADEC (Michael Lewis, District Engineer) regarding the sanitary sewer Notice of Violation issued August 6, 1992, ADEC Permit No. 9125-DB009. Louis Howard
9/15/1992 Update or Other Action Comprehensive Site Investigation with September and October groundwater sampling programs. Louis Howard
10/15/1992 Update or Other Action Report of Groundwater Monitoring Well Sampling and Analysis (dated July 1993). Louis Howard
10/15/1992 Update or Other Action Aquifer Pumping Test, Eskimo Creek Site SS11 (dated July 23, 1993). Louis Howard
10/15/1992 Update or Other Action Groundwater Monitoring Performed October 1992 (dated April 7, 1993). Louis Howard
1/15/1993 Notice of Violation September 30, 1991 - Notice of Violation letter dated September 30, 1991 does not appear to be in ADEC files. Notice of Violation letter dated April 1, 1992 to Air Force 11 ACW/DE (Lt. Col. Patrick Coullahan) from ADEC (Richard Sundet, Environmental Specialist) regarding the March 4, 1992 Air Force letter in response to the September 30, 1991 ADEC Notice of Violation letter; RCRA inspection. ADEC letter dated January 15, 1993 stated that the Air Force had adequately addressed the September 30, 1991 NOV issued by the Department, and the NOV is closed. Louis Howard
9/1/1993 Update or Other Action (Old R:Base Action Code = FS - Feasibility Study (General)). Former Staff
12/15/1993 Update or Other Action King Salmon Air Station, Analytical Results: Private Water Wells (dated March 1, 1994). Louis Howard
3/30/1994 Site Ranked Using the AHRM Initial ranking. Louis Howard
4/26/1994 Update or Other Action Final Environmental Assessment Drawdown at King Salmon Airport (dated and received in April 1994). Louis Howard
5/15/1994 Update or Other Action King Salmon Air Station, Analytical Results: Private Water Wells verification sampling program. Louis Howard
6/15/1994 Risk Assessment Report Approved Human Health and Ecological Risk Assessment (dated June 1995). FTA #1 and Lower and Upper Naknek Seeps were the only areas which posed a threat to human health. The Ecological Risk Assessment results indicated that chemicals in soil and water posed threats to Eskimo Creek, Refueler Shop, WACs, North/South Bluffs, Upper/Lower Naknek Seeps, and FTA #1. Louis Howard
6/30/1994 Update or Other Action Base-Wide Groundwater Sampling Program. Louis Howard
7/15/1994 Update or Other Action Trip Report, Groundwater Monitoring Event, King Salmon Air Station, September - October (dated June 14, 1995). This program was designed to supplement previous RI/FS efforts and to complete the RI/FS process on selected sites. In June and July 1994, a groundwater sampling program was initiated in which groundwater sampling of a representative network of base-wide monitoring wells took place. Louis Howard
5/8/1995 Notice of Violation January 14, 1994 - Notice of Violation letter to Air Force from ADEC dated January 14, 1994 regarding the June 1993 EPA/ADEC inspection (letter does not appear to be in the ADEC files). The Air Force response letter is dated February 8, 1994 and received by March 1, 1994. The Air Force response letter dated November 1, 1994 submitting information on the outstanding issues from the June 1990 and June 1993 Compliance Evaluation Inspections. The Air Force response letter dated December 12, 1994 submitting information on the outstanding issues from the June 1990 and June 1993 Compliance Evaluation Inspections. ADEC letter dated May 8, 1995 closed the NOV issued on January 14, 1994. ADEC and USAF letters dated October and November 1995 address closure on POL related Compliance Advisories issued by ADEC. Louis Howard
8/15/1995 Update or Other Action Final Seep Sampling Eskimo Creek and Naknek Sites (dated June 1996). Groundwater monitoring wells were sampled at Eskimo Creek and Naknek seeps. Results indicated that the recovery systems were still required. Louis Howard
8/29/1995 Site Characterization Report Approved Report, Installation Restoration Program, Remedial Investigation / Feasibility Study at 14 sites, Stage 3 Remedial Investigation studies conducted between October 1993 and December 1994 (final dated August 1995). Based on the results of the RI/FS and remedial actions completed prior to publication of the final RI/FS - the 2 Dry Wells, WACs, WAA#2, Road Oiling, and Landfill Number2 sites did not require further investigation. Louis Howard
9/8/1995 Interim Removal Action Approved IA action added by Shannon and Wilson on 3/14/97, based on Relative Risk Evaluation Worksheet dated 9/8/95. Phase listed as IRA; no other information available. S&W-Miner
12/15/1995 Update or Other Action Final Feasibility Study, Eskimo Creek Product Recovery System (dated January 1997). Feasibility Study for Eskimo Creek conducted form April to December 1995. The study evaluated remedial technology with respect to their applicability to use with the existing Eskimo Creek product recovery wells. The preferred alternative was in-well air sparging. Louis Howard
4/15/1996 Interim Removal Action Approved Installation and Systems Operation Manual for Groundwater Diversion Wall and Free Product Skimming Sump System (dated April 1996). Louis Howard
6/15/1996 Update or Other Action Final Installation-wide Environmental Baseline Survey. Louis Howard
6/15/1996 Update or Other Action Final Human Food Chain, Aquatic Biota, and Wetlands Evaluation workplan. Louis Howard
7/11/1996 Update or Other Action Seep Sampling At Eskimo Creek and Naknek Sites (draft dated January 1996, final dated July 1996). Louis Howard
9/15/1996 Update or Other Action Evaluation of Alternatives, Treatment and Discharge of Eskimo Creek Seep Water. Louis Howard
10/15/1996 Update or Other Action Final Field Report for Spring 1996, Human Food Chain, Aquatic Biota, and Wetlands Evaluation. Louis Howard
11/15/1996 Update or Other Action Aerial Photographic Analysis, King Salmon Airport Study Area. Prepared by EPA Region 10, Research and Development, Characterization, Research Division, TS-PIC-9710003S, dated November 1996. Gretchen Pikul
12/6/1996 Update or Other Action Community Relations Plan for King Salmon Airport and Naknek Recreation Camps 1 and 2 (draft dated December 1996, final dated May 1997). Gretchen Pikul
1/15/1997 Update or Other Action Preliminary Report, Human Food Chain, Aquatic Biota, and Wetlands Evaluation. Gretchen Pikul
1/28/1997 Update or Other Action Final Feasibility Study Eskimo Creek Product Recovery System. Gretchen Pikul
3/15/1997 Update or Other Action Feasibility Report (final revised) - dated March 1997. Preferred alternatives were identified for groundwater, wetlands, and soil in each 5 groundwater monitoring zones associated with the main base. Gretchen Pikul
4/8/1997 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - September 1996, Eskimo Creek Seeps I and II (dated March 1996, received April 1996). Gretchen Pikul
4/8/1997 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - October 1996, Eskimo Creek Seeps I and II (dated March 1996, received April 1996). Gretchen Pikul
4/15/1997 Update or Other Action King Salmon Residential Well Sampling Report November 1996 Sampling Event (dated March 1997, received April 1997). Gretchen Pikul
5/6/1997 Update or Other Action Feasibility Study Screening Assessment (draft dated May 1997) Gretchen Pikul
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
10/28/1997 Update or Other Action Underground Storage Tanks Approach for Remediation and Closure (dated December 11, 1995) and accompanying documents. Gretchen Pikul
10/28/1997 Update or Other Action Underground Storage Tanks Approach for Remediation and Closure (dated December 11, 1995, received October 28, 1997) and accompanying documents. Gretchen Pikul
10/30/1997 Proposed Plan King Salmon Airport Groundwater Zone OT027, Eskimo Creek (SS011), POL Storage Tanks (SS015), and Dry Well (DP023), The Proposed Plan for Remedial Action (dated October 27, 1997, with a public meeting on November 19, 1997). Following two years of monitored natural attenuation investigations in 1997 and 1998, the proposed remedial action planned was revised; and an updated proposed plan was issued August 8, 2000. Gretchen Pikul
3/25/1998 Update or Other Action King Salmon Residential Well Sampling Report November 1997 Sampling Event (dated and received March 1998). Gretchen Pikul
4/27/1998 Update or Other Action King Salmon, Naknek and South Naknek Native Villages Site Assessment Report (draft dated March 1998, received April 1998, no final received). Gretchen Pikul
5/12/1998 Update or Other Action Final King Salmon USTs Summary of UST Site Historical Information dated April 20, 1998, includes site area. Gretchen Pikul
6/10/1998 Update or Other Action Sampling and Analysis Plan and associated plans, Underground Storage Tank and Pipeline Monitoring (draft dated April 1998, final dated May 1998, received on June 10, 1998). Gretchen Pikul
7/7/1998 Update or Other Action Sampling Results from Eskimo Creek Treatment System (dated June 1998, received July 1998). Gretchen Pikul
7/13/1998 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - May 1998, Eskimo Creek Seeps I and II (dated June 1998, received July 1998). Gretchen Pikul
7/15/1998 Update or Other Action ADEC Factsheet: Overview Environmental Cleanup at a Military Site in King Salmon, Alaska (dated July 1998). Gretchen Pikul
8/13/1998 Meeting or Teleconference Held Public Meeting for Modified Risk Assessment on Groundwater Zone 1 Buildings (#647 and #649). Gretchen Pikul
8/20/1998 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - July 1998, Eskimo Creek Seeps I and II (dated August 1998). Gretchen Pikul
8/31/1998 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - June 1998, Eskimo Creek Seeps I and II (dated June 1998, received August 1998). Gretchen Pikul
9/4/1998 Update or Other Action King Salmon Residential Well Sampling, August 1997 Sampling Event, Analytical Results and Data Evaluation (dated March 1998, received September 1998). Gretchen Pikul
9/23/1998 Update or Other Action Risk Assessment Report, Groundwater Zone 1, Buildings #647 and #649 (draft dated July 1998, final dated September 1998). Gretchen Pikul
12/2/1998 Update or Other Action Human Food Chain, Aquatic Biota, and Wetlands Evaluations, Technical Report (Volume I - Report Text and Tables, Volume II - Maps, Figures and Photographs, and Volume III - Analytical Laboratory Reports) (draft dated July 1997, final dated November 1998). Gretchen Pikul
12/3/1998 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - August 1998, Eskimo Creek Seeps I and II (dated and received December 1998). Gretchen Pikul
12/3/1998 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - October 1998, Eskimo Creek Seeps I and II (dated and received December 1998). Gretchen Pikul
12/3/1998 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - September 1998, Eskimo Creek Seeps I and II (dated and received December 1998). Gretchen Pikul
1/27/1999 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - November 1998, Eskimo Creek Seeps I and II (dated and received January 1999). Gretchen Pikul
1/27/1999 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - December 1998, Eskimo Creek Seeps I and II (dated and received January 1999). Gretchen Pikul
2/24/1999 Update or Other Action Tier II Ecological Risk Assessment for Piscivorous Wildlife Inhabiting Eskimo Creek report (draft dated November 1996, final dated May 1997, received on February 1999). Prepared by Armstrong Laboratory. Gretchen Pikul
3/30/1999 Meeting or Teleconference Held Seattle meeting with trustees on fish study previous results and follow-on workplan. Gretchen Pikul
4/20/1999 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - January 1999, Eskimo Creek Seeps I and II (dated February 1999, received April 1999). Gretchen Pikul
4/20/1999 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - February 1999, Eskimo Creek Seeps I and II (dated April 1999, received April 1999). Gretchen Pikul
4/20/1999 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - March 1999, Eskimo Creek Seeps I and II (dated and received April 1999). Gretchen Pikul
6/8/1999 Update or Other Action Final Focused Aquatic Biota Sampling workplan (dated May 1999). Gretchen Pikul
6/15/1999 Leaking Underground Storage Tank Corrective Action Underway Bioventing systems operational, system operates during warm months. Gretchen Pikul
6/18/1999 Update or Other Action Fill Stand Water Sampling Results Memo - Zone 1 ASTs (dated June 18, 1999). Gretchen Pikul
7/13/1999 Update or Other Action Intrinsic Remediation Study CG-027 (Groundwater Zone 1) 1997 Results, King Salmon Airport (draft dated January 1999, final dated June 1999). Gretchen Pikul
7/29/1999 Update or Other Action Eskimo Creek Site Assessment (aka downtown seep) dated July 1999. Prepared by Hart Crowser for ADEC - Project Manager Jim Frechione. Gretchen Pikul
8/13/1999 Update or Other Action CG-027 (Formerly Groundwater Zone 1) Final Feasibility Study Report (draft dated June 1999, final dated August 1999). Gretchen Pikul
8/13/1999 Update or Other Action Final Groundwater Monitoring Report, Groundwater Zone 1, 1997 (dated July 1999). Gretchen Pikul
8/30/1999 Proposed Plan Final Proposed Plan for Interim Remedial Action, Groundwater Zone 1. Gretchen Pikul
9/13/1999 Update or Other Action Sampling Results from Eskimo Creek Treatment System (dated September 1999). Gretchen Pikul
9/13/1999 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - June 1999, Eskimo Creek Seeps I and II (dated June 1999, received September 1999). Gretchen Pikul
11/2/1999 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - July 1999, Eskimo Creek Seeps I and II (dated October 1999, received November 1999). Gretchen Pikul
11/2/1999 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - August 1999, Eskimo Creek Seeps I and II (dated October 1999, received November 1999). Gretchen Pikul
11/2/1999 Update or Other Action Monthly Monitoring, Discharge Monitoring Report - September 1999, Eskimo Creek Seeps I and II (dated October 1999, received November 1999). Gretchen Pikul
11/18/1999 Meeting or Teleconference Held Seattle meeting with trustees on focused fish study results and recommendations on 2000 field season workplan. Gretchen Pikul
1/13/2000 Update or Other Action ADEC received 3 letter reports - Monthly Monitoring, Discharge Monitoring Report for Eskimo Creek I and II - October 1999 (dated December 2, 1999); November 1999 (dated December 15, 1999); December 1999 (dated January 7, 2000) with TCE at 1.32 ug/L detected in the effluent sample. Gretchen Pikul
1/15/2000 Update or Other Action Focused Aquatic Biota Sampling, Technical Report (draft dated January 2000; ADEC comment letter dated 3-2-00; final not received). Gretchen Pikul
3/16/2000 Update or Other Action King Salmon Airport Restoration Advisory Board Orientation Manual (final dated April 1999 and received March 16, 2000). Gretchen Pikul
7/5/2000 Update or Other Action Eskimo Creek Seeps 1 and 2 Monthly Monitoring, Discharge Monitoring Report - March 2000 (dated June 15). Gretchen Pikul
7/5/2000 Update or Other Action Eskimo Creek Seeps 1 and 2 Monthly Monitoring, Discharge Monitoring Report - February 2000 (dated June 16). Gretchen Pikul
7/5/2000 Update or Other Action Eskimo Creek Seeps 1 and 2 Monthly Monitoring, Discharge Monitoring Report - January 2000 (dated March 15). Gretchen Pikul
7/25/2000 Update or Other Action Eskimo Creek Seeps 1 and 2 Monthly Monitoring, Discharge Monitoring Report - April 2000 (dated June 1and received on July 25). Gretchen Pikul
7/25/2000 Update or Other Action Eskimo Creek Seeps 1 and 2 Monthly Monitoring, Discharge Monitoring Report - June 2000 (dated July 10 and received on July 25). Gretchen Pikul
7/25/2000 Update or Other Action Eskimo Creek Seeps 1 and 2 Monthly Monitoring, Discharge Monitoring Report - May 2000 (dated July 1 and received on July 25). 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
8/30/2000 Update or Other Action Bioscreen Modeling to Document TCE Plume Remediation Timeframe - Zone 1 (dated August 28). Gretchen Pikul
10/4/2000 Update or Other Action Eskimo Creek Impact Study workplan (draft dated June 2000, ADEC comment letter dated June 23, 2000; final dated July 21, 2000 and received October 4, 2000). Gretchen Pikul
11/7/2000 Update or Other Action Eskimo Creek Seeps 1 and 2 Monthly Monitoring, Discharge Monitoring Report - July 2000 (dated October 31 and received on November 7). Gretchen Pikul
11/7/2000 Update or Other Action Eskimo Creek Seeps 1 and 2 Monthly Monitoring, Discharge Monitoring Report - August 2000 (dated October 31 and received on November 7). Gretchen Pikul
11/7/2000 Update or Other Action Eskimo Creek Seeps 1 and 2 Monthly Monitoring, Discharge Monitoring Report - September 2000 (dated October 31 and received on November 7). Gretchen Pikul
11/21/2000 Cleanup Level(s) Approved Record of Decision for Interim Remedial Action, Site: Groundwater Zone OT027 (Zone 1) dated November 2000; signed by ADEC on November 21, 2000 and signed by Air Force on December 29, 2000. This Interim ROD presents the selected interim remedial action for Zone 1 groundwater contamination and administrative site closure for DP023 and SS019 within Zone 1. Remaining contamination in other site media (e.g., soil) will be addressed in the Final ROD at a later date. Gretchen Pikul
11/21/2000 CERCLA ROD Approved Record of Decision for Interim Remedial Action, Site: Groundwater Zone OT027 (Zone 1) dated November 2000; signed by ADEC on November 21, 2000 and signed by Air Force on December 29, 2000. This Interim ROD presents the selected interim remedial action for Zone 1 groundwater contamination and administratively conduct a site closure for DP023 and SS019 (CS Hazard ID 233613) within Zone 1. The tanks for SS019 were removed in 1994 and the site currently is being biovented. SS019 has been administratively closed as an IRP site and ADEC contaminated site, and currently is being managed by the 611th Compliance Section under regulatory oversight by ADEC's Underground Storage Tank Program. Remaining contamination in other site media (e.g., soil) will be addressed in the Final ROD at a later date. Gretchen Pikul
2/5/2001 Long Term Monitoring Established Groundwater Monitoring Report - Groundwater Zone 1 - 1998 (draft dated April 1999 and received May 4, 1999; ADEC comment letter dated August 19, 1999; final dated December 2000 and received February 5, 2001). Gretchen Pikul
2/5/2001 Update or Other Action Intrinsic Remediation Study, Groundwater Zone 1, 1998 Results, King Salmon Airport (draft dated April 1999; final report dated December 2000 and received February 5, 2001). Gretchen Pikul
2/5/2001 Update or Other Action Intrinsic Remediation Study, Groundwater Zone 1, 1998 Results, King Salmon Airport (draft dated April 1999, ADEC comment letter on 2nd version dated November 7, 2000, final report dated December 2000, received on February 5, 2001). Gretchen Pikul
2/14/2001 Update or Other Action Eskimo Creek Seeps 1 and 2 Monthly Monitoring, Discharge Monitoring Report - October, November and December 2000 (dated February 6 and 7, 2001) - no exceedences. Gretchen Pikul
3/2/2001 Update or Other Action Eskimo Creek Impact Study Report (draft dated December 2000, ADEC comment letter dated March 2, 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
6/13/2001 Update or Other Action Eskimo Creek Seeps 1 and 2 Monthly Monitoring, Discharge Monitoring Report - January 2001 (dated March 15, 2001 and received on April 5, 2001; ADEC comment letter dated April 15, 2001; final dated June 13, 2001 and received in June 2001). Gretchen Pikul
6/13/2001 Update or Other Action Eskimo Creek Treatment Facility Monthly Monitoring Report - February 2001 (dated April 10, 2001; ADEC comment letter dated June 11, 2001; final dated June 13, 2001 and received in June 2001). Gretchen Pikul
6/15/2001 Update or Other Action Eskimo Creek Treatment Facility Monthly Monitoring Report - March 2001 (dated May 2, 2001; ADEC comment letter dated June 11, 2001; final dated June 15, 2001 and received in June 2001). Gretchen Pikul
6/27/2001 Update or Other Action Photographic Journal 2000 Monitoring Program (draft dated December 2000, final dated May 2001 and received June 27, 2001). Gretchen Pikul
7/11/2001 Update or Other Action Eskimo Creek Treatment Facility Monthly Monitoring Report - April 2001 (draft dated June 11, 2001; ADEC comment letter dated July 11, 2001; final not received). Gretchen Pikul
7/25/2001 Update or Other Action Work Plan - Groundwater Zone 1 (OT027) 2001 Bioslurping Pilot Test and System Design (draft dated July 2001 and received on July 23, 2001; ADEC comment letter dated July 25, 2001; no final received). Gretchen Pikul
8/9/2001 Document, Report, or Work plan Review - other Work Plans for 2001 Comprehensive Environmental Monitoring Projects at: North and South Bluffs (Zone 3); Naknek River Storage Area (Zone 4); Rapids Camp (Zone 6); Biovent and AS/SVE Monitoring at 6 Remediation Sites (4 in Zone 2, 1 at RAPCON - FT01, and 1 at MOGAS - SS19); and Soil Biocell Number 7 Cleanup Verification - (drafts dated and received in July 2001; ADEC comment letters dated July 2001; ADEC approval letters dated July and August 9, 2001; final dated November 28, 2001 and received on December 13, 2001). Gretchen Pikul
8/22/2001 Update or Other Action 2000 Limited Field Investigation at Eskimo Creek Treatment System Seeps report (draft dated December 21, 2000 and received January 2, 2001; ADEC comment letter dated March 1, 2001; final dated August 3, 2001 and received August 22, 2001 - some relatively minor comments were not incorporated into final version as stated in Air Force Comment Response). Gretchen Pikul
9/26/2001 Update or Other Action Restoration Advisory Board Pocket Guide and Community Outreach Handbook (ADEC comment letter dated May 30, 2001; final dated September 2001). Gretchen Pikul
10/16/2001 Update or Other Action Eskimo Creek Impact Study Report (draft dated December 2000; ADEC comment letter dated March 2, 2001; ADEC approval letter dated August 20, 2001; final dated October 16, 2001 - relatively minor comments were not addressed in final version). Gretchen Pikul
10/23/2001 Update or Other Action Underground Storage Tank and Pipeline Monitoring Report (draft dated February 1999; ADEC comment letter dated May 14, 1999; review draft dated March 30, 2000; comment resolution meeting on April 11, 2000; final dated April 11, 2001 and received October 23, 2001). Gretchen Pikul
11/28/2001 Update or Other Action Remedial Process Optimization Scoping Visit Report - June 26-28, 2001 (no draft received; final received September 26, 2001 - many comments and issues to be resolved; comment resolution meeting during EPA Seattle meetings November 28, 2001). Gretchen Pikul
11/29/2001 Meeting or Teleconference Held Meeting with Air Force, ADEC, and EPA at EPA Seattle office - November 26-29, 2001. Gretchen Pikul
12/5/2001 Update or Other Action Eskimo Creek Treatment Facility Monthly Monitoring Report - May 2001 (draft dated November 9, 2001 and received on November 19, 2001; ADEC comment letter dated December 5, 2001; final not received). ADEC also sent letters regarding 2 outstanding issues: Wastewater General Permit - which permit number is most appropriate for site; and Area of Concerns List for entire facility - list of AOCs to be entered into Air Force funding and included as IRP sites. Gretchen Pikul
12/11/2001 Update or Other Action 5 Eskimo Creek Treatment Facility Monthly Monitoring Reports - June through October 2001 (drafts all dated in November 2001 and received on December 7, 2001; ADEC comment letter dated December 11, 2001; final not received). Gretchen Pikul
12/13/2001 Document, Report, or Work plan Review - other Work Plans for 2001 Comprehensive Environmental Monitoring Projects at: North and South Bluffs (Zone 3); Naknek River Storage Area (Zone 4); Rapids Camp (Zone 6); Biovent and AS/SVE Monitoring at 6 Remediation Sites (4 in Zone 2, 1 at RAPCON - FT01, and 1 at MOGAS - SS19); and Soil Biocell Number 7 Cleanup Verification - (drafts dated and received in July 2001; ADEC comment letters dated July 2001; ADEC approval letters dated July and August 2001; final dated November 28, 2001 and received on December 13, 2001 Gretchen Pikul
1/8/2002 Update or Other Action Management Action Plan (draft dated January 2001; ADEC comment letter dated April 3, 2001; response to comments received June 11, 2001; comment resolution meeting on August 29, 2001; final report dated October 2001 and received on January 8, 2002; not all comments documented within the response to comments as being addressed are addressed within the final report; discussions with the Air Force continue on this issue). Gretchen Pikul
3/12/2002 Update or Other Action Eskimo Creek Treatment Facility Monthly Monitoring Report - November 2001 (draft dated February 5, 2002 and received on February 15, 2002; ADEC comment letter dated March 12, 2002; final not received). Gretchen Pikul
4/8/2002 Update or Other Action Eskimo Creek Treatment Facility Monthly Monitoring Report - December 2001 - draft dated February 25, 2002 and received on March 21, 2002; ADEC comment letter dated April 8, 2002; final not received). Gretchen Pikul
4/8/2002 Update or Other Action Eskimo Creek Treatment Facility Monthly Monitoring Report - January 2002; draft dated March 15, 2002 and received on March 27, 2002; ADEC comment letter dated April 8, 2002; final not received). Gretchen Pikul
4/9/2002 Update or Other Action Pilot Test Report, Groundwater Zone 1 (OT027), 2001 Bioslurping Pilot Test; draft dated February 2002; ADEC comment letter dated April 9, 2002. Gretchen Pikul
4/18/2002 Update or Other Action Eskimo Creek Treatment Facility Monthly Monitoring Report - February 2002 - draft dated April 8, 2002 and received on April 17, 2002; ADEC comment letter dated April 18, 2002; final not received). Gretchen Pikul
4/30/2002 Update or Other Action Eskimo Creek Treatment Facility Monthly Monitoring Report - March 2002 - draft dated April 18, 2002 and received on April 23, 2002; ADEC comment letter dated April 30, 2002; final not received). 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
10/9/2002 Update or Other Action Eskimo Creek Treatment Facility Monthly Monitoring Report for May 2002 and Annual Maintenance Report for 2001-2002; draft dated September 27, 2002 and received September 30, 2002; ADEC comment letter dated October 9, 2002. Gretchen Pikul
11/6/2002 Update or Other Action Eskimo Creek Treatment Facility Monthly Report for June 2002; draft dated October 9, 2002 and received on October 23, 2002; ADEC approval letter dated November 6, 2002. Gretchen Pikul
12/5/2002 Update or Other Action Eskimo Creek Treatment Facility Monthly Report for August 2002; draft dated October 17, 2002 and received on October 23, 2002; ADEC approval letter dated December 5, 2002. Gretchen Pikul
1/28/2003 GIS Position Updated Updated Quadrangle, Latitude, Longitude, Section, Township, and Range fields using TopoZone.com and site maps. Former Staff
1/28/2003 Site Number Identifier Changed Changed Workplan from X1 to X9 to reflect presence of hazardous substances above cleanup levels. Gretchen Pikul
2/28/2003 Update or Other Action General wastewater permit discharge exceedences noted within the February monthly effluent samples at the treatment system. The filter media was changed in January and typically is effective for 4 to 6 months. The Air Force operator promptly transferred control to the backup filter system (the facility is equipped with a redundant filter system) and sent personnel to evaluate the situation. A stuck solenoid valve may have allowed the water to bypass the other filter vessels and flow directly into the organo-clay filter vessel. The monthly effluent sample and an organo-clay sample were collected for laboratory analyses on March 4. The February sample results consisted of the following: total aromatic hydrocarbons at 11.46 µg/L (10 µg/L WQS), total aqueous hydrocarbons at 12 µg/L (15 µg/L WQS), DRO at 3 mg/L (1.5 mg/L 18 AAC 75), and trichloroethene at 6.71 µg/L (5 µg/L 18 AAC 75). Gretchen Pikul
3/11/2003 Update or Other Action Eskimo Creek Treatment Facility Monthly Report for September 2002; draft dated October 23, 2002 and received March 11, 2003. Gretchen Pikul
3/11/2003 Update or Other Action Remediation System Operation, Monitoring, and Maintenance Manual at Six Remediation Sites - draft dated February 22, 2002 and received March 21, 2002; ADEC comment letter dated April 15, 2002; final dated December 23, 2002 and received March 11, 2003. Gretchen Pikul
3/11/2003 Update or Other Action Technical Report – Remediation Systems 2001 Operation, Monitoring and Maintenance Biovent and AS/SVE Systems at Six Remediation Sites final dated December 20, 2002 and received on March 11, 2003. Also, Remediation System Operation, Monitoring, and Maintenance Manual at Six Remediation Sites; final dated December 23, 2002 and received on March 11, 2003. Gretchen Pikul
4/11/2003 Update or Other Action Eskimo Creek Treatment Facility Monthly Report for October 2002; draft dated November 11, 2002 and received on March 11, 2003; ADEC approval letter dated April 11, 2003. Gretchen Pikul
4/11/2003 Update or Other Action Eskimo Creek Treatment Facility Monthly Report for November 2002; draft dated December 23, 2002 and received on March 11, 2003; ADEC approval letter dated April 11, 2003. Gretchen Pikul
5/19/2003 Update or Other Action Work Plans for 2002 Comprehensive Environmental Monitoring Projects at: North and South Bluffs (Groundwater Zone - OT029), Naknek River Storage Area (Groundwater Zone 4 - OT030), Rapids Camp (Groundwater Zone - OT032), Main Base Area (Groundwater Zone - OT027), and Biovent and AS/SVE Monitoring at 6 Remediation Sites (8 draft work plans, ADEC comment letters, Air Force Comment Response, and comment resolution meetings in August and September 2002, Bluffs work plan dated March 2002; finals dated April 30, 2003 and received on May 19, 2003). Gretchen Pikul
6/23/2003 Update or Other Action Monthly Status Reports for Bioventing Systems for March, April, May, and June 2003 (dated June 20 and received on June 23, 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
8/22/2003 Update or Other Action 2002 Long-Term Monitoring Report - Base Living Area (Groundwater Zone 1 - OT027) draft dated and received on April 4, 2003; ADEC comment letter dated May 2, 2003; final dated and received in August 2003. Gretchen Pikul
10/1/2003 Update or Other Action Technical Report Remediation Systems 2002 Operation, Monitoring, and Maintenance Bioventing Systems at Six Remediation Sites (draft dated and received in August 2003; ADEC comment letter dated September 11, 2003; final dated and received October 1, 2003). Gretchen Pikul
10/22/2003 Update or Other Action ADEC approval letter dated October 22, 2003 to reuse Biocell 7 remediated soil as cover material for Landfill No. 0025-BA001 in Zone 1; no issues with Solid Waste section. Gretchen Pikul
11/13/2003 Update or Other Action Monthly Status Reports for Bioventing Systems - August through November 2003 (dated November 13, 2003). Gretchen Pikul
1/14/2004 Meeting or Teleconference Held ADEC participated in a meeting with new Air Force project manager (Keith Barnack) on AOCs; programming for AOC PA/SI is slated for 2005. These AOCs were compiled from an extensive review of the Aerial Photographic Analysis (dated November 1996) prepared by EPA Region 10. Gretchen Pikul
1/16/2004 Update or Other Action December 2003 Monthly Status Report for Bioventing Systems (electronic version dated and received on January 16, 2004). Gretchen Pikul
2/4/2004 Meeting or Teleconference Held Meeting on Air Force compliance projects and actions needed to gain closure, including biovent systems, former marina, and former POL pipeline. Gretchen Pikul
2/4/2004 Meeting or Teleconference Held Meeting/teleconference on the Zone 1 pilot test biovent system status. Gretchen Pikul
2/27/2004 Update or Other Action February 2004 Monthly Status Report for Bioventing Systems (dated February 17, 2004 and received by ADEC via e-mail on February 27). Gretchen Pikul
4/1/2004 Update or Other Action Remediation Systems 2003 Operation, Monitoring and Maintenance at Six Remediation Sites Work Plan Addendum; 1st draft dated and received in July 2003; ADEC comment letter dated August 8, 2003; ADEC approval letter dated August 19, 2003; 2nd draft dated and received on January 9, 2004; ADEC comment letter dated February 13, 2004; Air Force Comment Response received March 31, 2004; and ADEC approval letter dated April 1, 2004. Gretchen Pikul
4/16/2004 Update or Other Action ADEC Source Water Assessment for Public Water System # 260503.001, # 260503.002, and # 260503.005 (3 reports) all in Zone 1; CS received reports via e-mail on April 13, 2004 with request by Drinking Water Program and Air Force to review; CS comment letter dated April 16, 2004. Gretchen Pikul
4/22/2004 Update or Other Action Work Plan Addendum Long-Term Monitoring for 2003 Groundwater Zone 1 - OT027 (draft dated and received in July 2003; ADEC comment letter dated August 7, 2003; final received April 22, 2004). Gretchen Pikul
4/22/2004 Update or Other Action Field Sampling Plan Addendum 2003 Environmental Restoration Program at Main Base Area (Groundwater Zone 1 - OT027), North and South Bluffs (Groundwater Zone 3 - OT029), Naknek River Storage Area (Groundwater Zone 4 - OT030), Rapids Camp Landfill (Groundwater Zone 6 - OT032), Red Fox Creek (Groundwater Zone 5 - OT031), and Bioventing Operations at Six Remediation Sites (draft dated and received in July 2003; ADEC comment letter dated July 28, 2003; final received April 22, 2004). Gretchen Pikul
4/22/2004 Update or Other Action Quality Assurance Project Plan for Sites: Main Base Area (Groundwater Zone 1 – OT027), North and South Bluffs (Groundwater Zone 3 – OT029), Naknek River Storage Area (Groundwater Zone 4 – OT030), Rapids Camp Landfill (Groundwater Zone 6 – OT032), Red Fox Creek (Groundwater Zone 5 – OT031), and Bioventing Operations at Six Remediation Sites (draft dated July 30 and received August 1, 2003; ADEC conditional approval letter dated August 8, 2003; final received April 22, 2004). Gretchen Pikul
5/6/2004 Update or Other Action March 2004 Monthly Status Reports for Bioventing Systems at King Salmon Air Station (dated May 6, 2004). Gretchen Pikul
5/6/2004 Update or Other Action Bioventing Pilot Test Report – Remedial System Design for Groundwater and Vadose Zone Remediation at POL Tanks ST015; draft dated May 2004. Gretchen Pikul
6/8/2004 Update or Other Action Fact Sheet for King Salmon Air Station Environmental Restoration Project; draft fact sheet received and ADEC comments sent on April 16; Air Force Comment Response received on May 25; final dated and received in June 2004. Gretchen Pikul
6/18/2004 Update or Other Action May and June 2004 Monthly Status Reports for Bioventing Systems (dated and received on June 18, 2004). Gretchen Pikul
7/16/2004 Update or Other Action 2003 Long-Term Monitoring Base Living Area (Groundwater Zone 1 – OT027) Draft dated May 11 and received May 14, 2004; ADEC comment/conditional approval letter dated June 7; Air Force Comment Response received on July 16, 2004; 2003 Long-Term Monitoring Base Living Area (Groundwater Zone 1 – OT027) Final dated November 8 received December 6, 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
8/9/2004 Update or Other Action 2004 Work Plan Addendums: 2004 Remediation Systems Operation, Monitoring, and Maintenance at Seven Remediation Sites; draft dated July 30 and received on August 5, 2004; ADEC comment letter/conditional approval letter dated August 9, 2004; Air Force Comment Response received August 26 and ADEC sent e-mail on August 27 stating that Comment Response is acceptable and referred to ADEC conditional approval letter dated August 9, 2004. Gretchen Pikul
8/10/2004 Update or Other Action 2004 Work Plan and Addendum: 2004 Field Sampling Plan Addendum; draft dated July 30 and received on August 3, 2004; ADEC comment letter dated August 10, 2004; AND 2004 Quality Assurance Project Plan; draft dated July 28, 2004 and received on August 3; ADEC approval letter dated August 9, 2004. Gretchen Pikul
8/27/2004 Update or Other Action 2004 Work Plan Addendums: 2004 Long-Term Monitoring Groundwater Zone 1 – OT027; draft dated July 8, 2004 and received on July 27; ADEC comment letter dated August 5, 2004; Air Force Comment Response received on and ADEC approval letter sent on August 27, 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
10/1/2004 Update or Other Action Eskimo Creek Treatment Facility Monthly Report for August 2004, received October 1, 2004 Jeff Norberg
10/25/2004 Update or Other Action Eskimo Creek Treatment Facility Monthly Report for September 2004, received October 25, 2004 Jeff Norberg
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
11/30/2004 Update or Other Action Eskimo Creek Treatment Facility Monthly Report for October 2004, received November 30, 2004 Jeff Norberg
12/17/2004 Update or Other Action Eskimo Creek Treatment Facility Monthly Report for November 2004, received December 17, 2004 Jeff Norberg
1/19/2005 Update or Other Action Eskimo Creek Treatment Facility Monthly Report for December 2004, received January 19, 2005 Jeff Norberg
3/9/2005 Update or Other Action Eskimo Creek Treatment Facility Monthly Report for January 2005, received March 09, 2005 Jeff Norberg
4/19/2005 Update or Other Action Eskimo Creek Treatment Facility Monthly Report for February 2005, received April 19, 2005 Jeff Norberg
8/25/2005 Update or Other Action Technical Report Remediation Systems 2003 Operation, Monitoring, and Maintenance Bioventing Systems at Six Remediation Sites; final draft dated and received in February 2005; ADEC comment letter dated April 25; Response to Comments June 16; ADEC approval letter July 12; final dated August 5, 2005 received August 25. Jeff Norberg
10/25/2005 Update or Other Action Field Sampling Plan Addendum - 2005 Environmental Restoration Program; draft dated August 15, 2005 received August 18; ADEC comment letter September 1; comment resolution meeting held September 7; ADEC approval letter issued October 25. Jeff Norberg
10/25/2005 Update or Other Action Quality Assurance Project Plan; draft dated August 31 and received on September 1, 2005; ADEC comment letter dated September 6; response to comment resolution meeting held September 7; ADEC approval letter dated October 25, 2005. Jeff Norberg
5/1/2006 Update or Other Action Alaska Department of Transportation & Public Facilities (ADOT&PF) Agency scoping letter related to the proposed King Salmon Airport Improvements Project No. 57922 received December 27, 2004; ADEC issued a comment letter on January 28, 2005 identifing environmental concerns which could impact Eskimo Creek Dump (Air Force IRP Site SS022) located on the boundary of Groundwater Zones 1 and 2. Included in the scoping letter was a preferred alternative to realign Jensen Road across Eskimo Creek and its surrounding wetlands in the vicinity of Site SS022; as a result of these and other environmental concerns ADOT&PF conducted a Practicability Study during 2005 to further review options; DEC received a 95% complete (Pre-PS&E) plans/specs/engineer report on March 23, 2006 which identified a new preferred alternative for the realignment of Jensen Road which would not impact Site SS022, Eskimo Creek, or its surrounding wetlands; ADEC issued comments via email on May 1, 2006 concurring with the revised proposal. Jeff Norberg
6/16/2006 Update or Other Action Implementation of Remedial Process Optimization (RPO) Recommendations Report; draft dated March 2005 received March 30, 2005; ADEC comment letter dated May 16, 2005; Air Force Comment Response and ADEC approval letter issued on May 20, 2005; final dated June 2006 received on June 16, 2006. Jeff Norberg
10/3/2006 Update or Other Action First Five-Year Review – Groundwater Zones 1-4 and 6; draft dated October 2005 received November 8, 2005; ADEC comment letter dated December 7, 2005; revised draft dated January 2006 received January 31, 2006; ADEC comment letter dated July 6; Air Force Comment Response received on August 27; ADEC approval letter dated August 29; Final received October 3, 2006. Jeff Norberg
12/12/2006 Update or Other Action Report - 2004 Long-Term Monitoring, Base Living Area (Groundwater Zone 1 - OT027); draft dated June 17, 2005 received June 20; ADEC comment and conditional approval letter dated November 4, 2005; received Comment Response on October 20, 2006; Final document submitted Dec 12, 2006. Jeff Norberg
1/26/2007 Update or Other Action File number issued 2569.38.015. Aggie Blandford
6/1/2007 Update or Other Action Report - 2006 Long-Term Monitoring, Base Living Area (Groundwater Zone 1 - OT027); draft dated May 31, 2007 received June 1; Jeff Norberg
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 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
4/17/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Jonathan Schick
10/21/2008 Site Visit ADEC staff took part in a site visit to a number of pertinent sites at King Salmon Air Station over a 2 day visit. Sites, especially the pending Multi Site Inspection sites, were inspected for any visible evidence of contamination and potential sampling locations as the work plans are still being formulated. ADEC staff was accompanied to all of the sites by the Project managers from the USAF and thier contractors. A Restoration Advisory Board meeting was held during the site visit. The topics discussed included the most recent basewide monitoring program, a discussion of the Multi-SIte inspection project, an update on the status of the Groundwater Zone 5 Records of Decision, and a brief discussion concerning the TCE treatibility Study in Groundwater Zone 1. The next RAB meeting has been tentatively scheduled for April 21, 2009. Jonathan Schick
10/22/2008 Document, Report, or Work plan Review - other ADEC recieved a copy of the Draft 2007 Comprehensive Environmental Monitoring Report covering Groundwater Zones 1, 2, 3, 4, and RAPCON and Red Fox Creek. It is dated October 2008 and is under review by the State. Jonathan Schick
10/22/2008 Document, Report, or Work plan Review - other ADEC recieved a copy of the Draft 2007 Comprehensive Environmental Monitoring Report covering Groundwater Zones 1, 2, 3, 4, and RAPCON and Red Fox Creek. It is dated October 2008 and is under review by the State. Jonathan Schick
10/22/2008 Document, Report, or Work plan Review - other ADEC recieved a copy of the Draft 2007 Comprehensive Environmental Monitoring Report covering Groundwater Zones 1, 2, 3, 4, and RAPCON and Red Fox Creek. It is dated October 2008 and is under review by the State. Jonathan Schick
12/4/2008 Update or Other Action ADEC recieved a copy of the Revised Final version of the Treatability Study for TCE contamination at Groundwater ZOne 1 at King Salmon Air Station. Jonathan Schick
12/4/2008 Update or Other Action ADEC recieved a copy of the Revised Final version of the Treatability Study for TCE contamination at Groundwater ZOne 1 at King Salmon Air Station. 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
7/7/2009 Update or Other Action ADEC staff recieved a draft version of the Record of Decision for OT027 Groundwater Zone 1. This document addresses the TCE contamination that has impacted the A-aquifer in the base living area in Groundwater Zone 1. The ROD proposes Monitored Natural Attenuation of the TCE and petroleum contamination in groundwater, continued passive petroleum product removal from groundwater and land use controls to prevent exposure to the impacted groundwater. Currently the USAF is monitoring the TCE concentrations in the groundwater in Zone 1 specifically at the point of compliance at the edge of Eskimo Creek. 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
5/4/2010 Meeting or Teleconference Held ADEC met with USAF project manager to discuss a plan forward for the Record of Decision for Groundwater Zone 1. The Draft ROD has been under review for a long period of time and so a meeting was held to talk about major issues with the docuemnt and how these issues will be resolved in the future. Monitored Natural Attenuation is the selected remedy for the site and so a comprehensive monitoring program must be established and Institutional COntrols have to be put in place and enforced. Jonathan Schick
6/8/2010 Update or Other Action ADEC staff submitted a comment letter on the Draft Record of Decision for Groundwater Zone 1 at King Salmon. The comment letter stated that additional supporting documentation will be needed regarding the estimated time frame for monitored natural attenuation to reach the cleanup goals for the site. Estimates have ranged from 25 to over 100 years that would be required for the contaminants in the groundwater to achieve the cleanup goals. If selected, this remedy will need to be scrutinized at each Five-Year Review to determine if it is protective, and if the data trends support the Air Force’s assertion that the cleanup will be achieved in 25 years. If the data does not support the 25 year estimate as attainable, then the remedy will need to be reevaluated at that time. Jonathan Schick
7/28/2010 Update or Other Action ADEC staff recieved the draft versions of the 2009 Long-Term Monitoring Report for the Comprehensive Environmental Monitoring Program for basewide groundwater monitoring. The sample collection and analysis from groundwater, surfacewater and sediment samples from Groundwater Zones 1 through 5. Jonathan Schick
9/8/2010 Update or Other Action ADEC staff submitted comments to the USAF summarizing concerns and edits on the 2009 Comprehensive Environmental Monitoring Report. The report detailed sampling groundwater, surfacewater and sediment at the 5 main groundwater zones at King Salmon Air Station. ADEC's main concerns were regarding the high DRO levels in Groundwater Zone 1 which showed a substantial increase in concentration since the 2008 sampling event, and the differentiation between Remedial Action Objectives as called out in the Records of Decision for these sites and the established ADEC cleanup levels in 18 AAC 75. Jonathan Schick
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
1/5/2011 Update or Other Action Contaminated Sites Staff recieved the Final Version of the Work Plans for Comprehensive Environemtnal Monitoring across all of the groundwater zones at King Salmon Air Station including RAPCON/Red Fox Creek. Surface water and sediment sampling was scheduled to be conducted in several of the areas of concern as well as the analysis of groundwater samples. The Work Plan is dated August 2010. Jonathan Schick
1/19/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff recieved a revised version of the 2010 Comprehensive Environmental Monitoring Report. The revisions incorporated the requested amendments from the draft and the report should be finalized. Jonathan Schick
2/22/2011 Update or Other Action Contaminated Sites Staff recieved a Final Version of the 2009 COmprehensive ENvironmental Monitoring Report covering groundwater and surfacewater sampling from Zones 1 through 5 at King Salmon. Comments on the Draft version were addressed and incorporated in the Final Version. Jonathan Schick
3/31/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff recieved the Draft Report for Comprehensive Environemental Monitoring for all of the groundwater zone sites across King Salmon. The report details the collection and analysis of groundwater and surface water samples all over the King Salmon Airport footprint as related to numerous IRP sites. Jonathan Schick
3/31/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff recieved the Draft version of the 2010 Comprehensive Environmental Monitoring Report for groundwater and surface water sampling at all of the zones at the King Salmon Air Station. The report was dated March 2011. 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
4/14/2011 Update or Other Action Contaminated Sites Staff recieved a Draft Work Plan for the Investigation of the B-Aquifer in Groundwater Zone 1. The plan details the investigation of existing B-Aquifer wells and the installation of up to 7 additional wells in the vicinity of MW-41 where TCE has been observed above the cleanup level for several years. Jonathan Schick
5/9/2011 Update or Other Action Contaminated Sites Staff submitted a letter to the USAF with comments on the Draft Work Plan for the investigation of B-Aquifer water in Grouundwater Zone 1. ADEC's concerns with the plan included the decommissioning of MW-41 before any new information is gathered from the newly installed wells. Additionally, the plan called for no soil sampling other than geotechnical analysis, and we commented that TCE data in the soils above and below the A-Aquifer would be valuable, and should be collected during the installation of new monitoring wells. Jonathan Schick
5/9/2011 Update or Other Action Contaminated Sites Staff submitted a comment letter to the USAF regarding the Draft Work Plan for Monitoring Well Decommissioning and Repair at all of the Groundwater Zones in King Salmon. Our main concerns were regarding improving the protectiveness of the decontamination of the equipment between wells to prevent cross contamination. Also regarding the treatment and disposal of any investigation derived waste water including the water generated during the decontamination of equipment. Jonathan Schick
5/25/2011 Update or Other Action ADEC Contaminated Sites Staff recieved the Draft Work Plans for 2011 Comprehensive Environmental Monitoring Projects for Groundwater Zones 1 through 4 including RAPCON and Red Fox Creek sites. Jonathan Schick
6/6/2011 Update or Other Action Contaminated Sites Staff recieved response to coments on the Draft Work Plan for the B-aquifer investigation in Groundwater Zone 1 at King Salmon. The responses addresssed our concerns. Jonathan Schick
6/6/2011 Update or Other Action Contaminated Sites Staff submitted comments to the US Air Force Remedial Project Manager regarding the 2011 Work plans for Comprehensive Environmental Monitoring Projects for Groundwater Zones 1-4 and RAPCON and Red Fox Creek. Our concerns were regarding several drums that have been stored within the bioremediation cells and also the need for an Explanation of Significant Differences for the South Bluffs Treatment System. Jonathan Schick
6/14/2011 Update or Other Action Contaminated Sites Staff submitted a letter to the King Salmon Remedial Project Manager approving the finalization of the Work Plan for the B-Aquifer Investigation into the TCE impacts at Groundwater Zone 1 in King Salmon. All of our comments were addressed and the plan is approved to be finalized with the agreed upon changes and implmented in the field. Jonathan Schick
6/21/2011 Update or Other Action Contaminated Sites Staff received responses to our comments on the Draft Work Plan for Monitoring Well Decommissioning and Repair. The responses were acceptable and the plan should be approved to be implemented in the field. Jonathan Schick
6/23/2011 Update or Other Action Contaminated Sites Staff submitted a letter to the Air Force's Remedial Project Manager for King Salmon approving the Work Plan for Monitoring Well Decommissioning and Repair across the King Salmon Installation. The work is scheduled to be conducted in July of 2011 Jonathan Schick
6/23/2011 Update or Other Action Contaminated Sites Staff recieved the Final Versoin of the Work Plan for Monitoring Well Decommissioning and Repair for all sites across King Salmon Air Station. The Comments from the Draft Version of the Plan were addressed in the response to comments and in the Final Version of the document. Jonathan Schick
7/20/2011 Update or Other Action Contaminated Sites Staff recieved the Final Version of the Work Plan for Investigation of the B-Aquifer in Groundwater Zone 1 for King Salmon Air Station. The document is dated June 2011 and all of the State's comments were addressed in the Final version of the plan. Jonathan Schick
8/26/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff recieved a FInal version of the Monitoring Well Decommissioning and Repair Report for King Salmon. The report detailed the monitoring wells throughout the King Salmon area that were either decommissioned and removed, or repaired for future work. Jonathan Schick
8/29/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff submitted a letter to the AIr Force's Project Manager approving the final report for the Monitoring Well Decommissioning project. The report detailed the 2011 activities at the sites across many areas at King Salmon Air Station. Jonathan Schick
11/3/2011 Document, Report, or Work plan Review - other Contamianted Sites Staff submitted comments to the US Air Force Remedial Project Manager on the Draft 2010 Comprehensive Environmental Monitoring Report. The report covered the groundwater and surface water sampling at each of the 5 groundwater zones at King Salmon Air Station. THe main issues with the report was the inconsistencies with the work plan regarding the number and location of wells to sample. Jonathan Schick
11/3/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff submitted a comment letter to the Air Force's Remedial Project Manager with comments on the Draft 2010 Comprehensive Environmental Monitoring Projects. The comments were in regards to the need to complete Five-Year Reviews for several of the Groundwater Zones thus requiring a large scale review of the data from all of these sites from the past 5 years and beyond. Other comments were regarding the report's presentation of some histroic data and the concern about the exceedance of iron in the surface water at the South Bluffs Treatment facility. Jonathan Schick
12/4/2011 Update or Other Action Contaminated Sites Staff recieved responses to our comments from November 3 and a revised Final Version of the 2010 Comprehensive Environmental Monitoring Report. The responses were not adequate and further review of the comments and the document are required. Jonathan Schick
12/4/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff recieved Responses to our comments on the Draft 2010 Comprehensive Environmental Monitoring Report for the 5 groundwater zones at King Salmon. The majority of the responses were acceptable but there were several technical issues that will still need to be resolved before the report can be finalized. Jonathan Schick
12/9/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff submitted a letter to the US Air Force Remedial Project Manager regarding the remaining technical issues with the Draft 2010 Comprehensive Environmental Monitoring Report. The issues should be amended before the report can be finalized. Jonathan Schick
12/9/2011 Document, Report, or Work plan Review - other Contaminated Sites Staff submitted a letter to the Air Force's Remedial Project manager with regards to the responses to our comments on the 2010 Comprehensive Environmental Monitoring Report. The responses did not address ADEC's concerns about the need for 5-Year Reviews for several of the sites, or our concern about the elevated levels of iron in the surface water at the South Bluffs Treatment Facility. Jonathan Schick
3/20/2012 Document, Report, or Work plan Review - other Submit comments to US Air Force on the Draft B-Aquifer Investigation Report for KSAS. Jonathan Schick
4/3/2012 Meeting or Teleconference Held Contaminated Sites Staff met with members of the Remedial Project team from the US Air Force and their consultants and discussed the comments on the Draft Work Plan for Preliminary Assessments/Site Inspections for Cape Newenham, Cape Lisburne, Indian Mountain, Tatalina LRRS, Eareckson Air Station, and King Salmon Air Station. The main concerns were that the work plans were developed without input on the scope of work from the regulator and that the limited scope did not allow for sampling of the necessary constituents to properly characterize sites where fuels were not the only concern. Jonathan Schick
5/14/2012 Document, Report, or Work plan Review - other Contaminated Sites Staff recieved the Final versions of the Work Plan for Preliminary Assessments/Site Inspections for Cape Newenham, Cape Lisburne, Indian Mountain, Tatalina LRRS, and King Salmon Air Station. Jonathan Schick
5/24/2012 Document, Report, or Work plan Review - other Contaminated Sites Staff recieved the Final Version of the 2010 Comprehensive Environmental Monitoring Report dated May 2012 for King Salmon Air Station that covers the groundwater and surface water monitoring at each of the 5 groundwater zones at the Air Station. Jonathan Schick
12/4/2012 Update or Other Action File number 2569.38.015.08 assigned to consolidate all B-Aquifer investigation reports. Guy Warren
12/5/2012 Document, Report, or Work plan Review - other Submit approval letter for King Salmon B-Aquifer investigation report. Report identified the results of additional characterization activities conducted in the B-Aquifer. Guy Warren
6/25/2013 Document, Report, or Work plan Review - other Submit comments on the Work Plan for follow-on investigation at Site OT027-KSAS. Work plan details PSG, soil, and ground water investigation activities planned for Zone 1. Guy Warren
7/22/2013 Document, Report, or Work plan Review - other Submit approval letter for "Final Work Plan for Follow-On Investigation at Site OT27" to the US Air Force. Plan identifies Passive soil gas, soil borings, and ground water sampling that will be conducted to better delineate source areas of TCE contamination at the site. Investigation should provide better characterization of the distribution of TCE in the A and B aquifers. Guy Warren
9/4/2013 Document, Report, or Work plan Review - other Submit approval letter to US Air Force for "Final Work Plans 2013 Comprehensive Environmental Monitoring” King Salmon Airport, Alaska. The Final work plans identify the groundwater monitoring and Institutional Control monitoring requirements for Groundwater Zones 1, 2, 3, 4, 5, 6, and 7. Sampling is scheduled to begin this week. Sampling of 10 A-aquifer wells and three b-aquifer wells is included in the plan for Zone 1. Guy Warren
9/17/2013 Document, Report, or Work plan Review - other Submit approval letter to US Air Force for the Final 2012 Comprehensive Environmental Monitoring Report for King Salmon Airport. Project activities for Zone 1 included ground water, surface water, and sediment sampling. Sample results were consistent with last year. Recommendations for Zone 1 include elimination of GRO as an analyte in ground water, reduced frequency of surface water and sediment sampling, and addition of IC inspections. Guy Warren
7/10/2014 Update or Other Action Submit approval letter to Air Force for the 2013 Comprehensive Environmental Monitoring Report (CEMR) for King Salmon Divert, AK. Monitoring for GW Zone 1 included groundwater sampling in the A and B aquifers. In the A aquifer four well points and three monitoring wells exceeded the cleanup level of 1.5 mg/L for DRO. TCE was detected above the action level of 0.0027 mg/L in four of the point of compliance (POC) well points. TCE was also detected in monitoring wells EKMW-1 and MW-47 above the RAO. Detections of BTEX compounds in the A-Aquifer monitoring wells were all below cleanup levels. Inorganic parameters measured in Zone 1 groundwater provide some evidence that natural attenuation of petroleum hydrocarbons is occurring in the A-Aquifer. Since the majority of concentration trends are decreasing or stable, this analysis provides more evidence that intrinsic remediation is attenuating contaminants, or at least keeping contaminant concentrations in check. All BTEX and DRO detections in the Zone 1 B-Aquifer monitoring wells were below RAOs. MW-41 exceeded the RAO of 0.005 mg/L for TCE. The TCE concentration detected at MW-41 shows an increase relative to the results from the nine previous years. There were no other RAO exceedences for TCE in the Zone 1 B-Aquifer monitoring wells. This well is at the center of an ongoing RI/FS for TCE contamination in GWZ 1, under a separate contract. IC inspections included a search for domestic water wells. There were no drinking water wells present, or being installed in the A-Aquifer or the B-Aquifer. Guy Warren
7/29/2014 Update or Other Action Submit comments on the Draft supplemental RI work plan for OT027. The work plan calls for a comprehensive ground water monitoring event of all Zone 1 wells to better characterize the extent of ground water contamination in the A and B aquifers. Additional monitoring wells will be installed to better characterize the extent of TCE contamination. Comments focused on inclusion of additional Passive Soil Gas sampling to identify the source area and removing RRO and GRO from the list of analytes. Work is scheduled for summer 2014. Guy Warren
8/28/2014 Document, Report, or Work plan Review - other Submit approval letter to US Air Force for "Final Work Plans 2014 Comprehensive Environmental Monitoring” King Salmon Airport, Alaska. The Final work plans identify the groundwater monitoring and Institutional Control monitoring requirements for Groundwater Zones 1, 2, 3, 4, 5, 6, and 7 as well as maintenance at the bio-cells. Sampling of 10 A-aquifer wells and three b-aquifer wells is included in the plan for Zone 1. 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. Contaminant concentrations continue to exceed DRO and TCE cleanup levels in several wells. Supplemental RI is ongoing to address groundwater contamination in Zone 1. Guy Warren
4/11/2016 Update or Other Action Submit approval letter for Final 2015 Long Term Monitoring Report for King Salmon Divert. Groundwater and surface water samples were collected from multiple locations and an IC inspection was conducted. Contaminant concentrations continue to exceed DRO and TCE cleanup levels in several A-aquifer and B-aquifer wells. Monitoring shall continue at this site. In addition to groundwater monitoring, 30 soil samples were collected from 30 discrete locations in an area where stored drums were removed in 2009. Soil samples were analyzed for GRO, DRO/RRO and PCBs. Three of the sample locations exceeded cleanup levels for DRO. No samples exceeded cleanup levels for GRO, RRO and/or PCBs. Soil in the vicinity of samples 5, 21, ad 29 should be excavated and treated. Guy Warren
8/19/2016 Document, Report, or Work plan Review - other ADEC approved the Work Plans for 2016 Long Term Monitoring within the King Salmon Divert which includes groundwater Zone 1. Sampling will include sampling ten A-Aquifer monitoring wells/well points: RPO-1, WP03-09, WP03-11, GP-1(A), ETMW-2, MW-9, MW89-1, MW-6, MW-23, and MW-28, as well as, sampling three B-Aquifer wells: MW41, MW-13-13B, and MW-13-09B. Holly Weiss-Racine
2/6/2017 Document, Report, or Work plan Review - other DEC reviewed and approved the Final “Supplemental Remedial Investigation (RI) at Site OT027 Report, for King Salmon Divert, AK”. DEC accepts all responses to comments provided by the US Air Force and concurs that sufficient data have been collected to assess surface and subsurface soil trichloroethylene contamination and exposure pathways. Joy Whitsel
2/17/2017 Update or Other Action Draft RAO LTM report received for review and comment. GWZ 1: None of the A-Aquifer monitoring wells exceeded the ADEC GW cleanup levels for BTEX. Four well points and two monitoring wells exceeded the cleanup level of DRO. TCE was observed above the cleanup level of 0.005 mg/L at ETMW-02 (0.087 mg/L),MW-6 (0.024 mg/L), MW-23 (0.019 mg/L), and MW-28 (0.11 mg/L). TCE was above the cleanup level at two of the five point of compliance (POC) well points. All results for 1,4-Dioxane were ND. The majority of concentration trends including that for TCE are stable or decreasing. This indicates that intrinsic remediation is keeping contaminant concentrations stable or decreasing at this site. TCE was found at 0.072 mg/L in MW-41, and 0.048 (0.047) mg/L in MW13-09B. A-Aquifer MW-9: 1,2,4-Trimethylbenzene was detected above the 15 ug/L cleanup level at 130 ug/L and naphthalene was detected above the 1.7 ug/L cleanup level at 280 ug/L. B-Aquifer MW-41: Vinyl chloride was detected above the 0.19 ug/L cleanup level at 6.7 ug/L and naphthalene was detected above the 1.7 ug/L cleanup level at 14 ug/L. See site file for additional information. Louis Howard
3/13/2017 Document, Report, or Work plan Review - other Staff provided comments on the RA-O/LTM Report. Section 1.13 It was noted that several coolers from Zone 1 had COCs documenting cooler temperatures of 11.2, 11.0 and 10.2 degrees C, which is outside of the laboratory temperature requirements. Please add discussion of all out of temperature range coolers and other data quality issues to the report. Section 1.17 Define “No Trend” in this section, as it is used in each Zone’s Conclusions Section. Section 2.3.2.2 Inconsistency in text first sentence says MW13-13B had TCE detected, then last sentence says it was non-detect. The first sentence should be revised as the other TCE detection was MW13-09B. Please revise. See site file for additional information. Louis Howard
3/20/2017 Update or Other Action Draft Feasibility Study received for review and comment. The human health risk assessment (HHRA) completed for the supplemental RI (EA 2016) concluded there is no risk associated with soil based on contaminant concentrations and associated depths. There was unacceptable risk associated with groundwater from both the A and B-Aquifers. The supplemental RI also concluded that there is not an immediate human health exposure risk associated with vapor intrusion based on ADEC indoor air target levels. Based on the results of historical ecological risk evaluations performed at the site, as well as contemporary sediment and surface water monitoring data, potential risks to benthic organisms and other aquatic organisms, piscivorous wildlife, and terrestrial wildlife at Site OT027 are also expected to be acceptable. Based on the contaminant concentrations observed in groundwater and soil and the HHRA and ecological risk assessment results, remedial alternatives were developed for groundwater and soil. The following remedial alternatives were identified as potential alternatives for the remediation of groundwater: Alternative 1: No Further Action Alternative 2: Institutional Controls (ICs) and Long-Term Monitoring (LTM) of TCE and DRO Alternative 3: Pump and Treat Alternative 4: Air Sparging for Containment and TCE Hot Spot Treatment Alternative 5: Liquid-Activated Carbon Barriers and In Situ Biological Treatment of TCE and Monitored Natural Attenuation (MNA) of DRO Alternative 6: In Situ Chemical Reduction of TCE and MNA of DRO Alternative 7: In Situ Chemical Oxidation of DRO. See site file for additional information. Louis Howard
4/20/2017 Document, Report, or Work plan Review - other Staff provided comments on the draft feasibility study for OT027 GWZ 1. Main comments were regarding polynuclear Aromatic Hydrocarbons (PAHS). PAHs were not analyzed as part of the 2013 follow on investigation. Any future soil sampling will require analysis of PAHs via 8270-SIM. In addition to the minimum PAHs that will be reported: acenaphthene, anthracene, benzo(a)anthracene, benzo(a)pyrene, benzo(b)fluoranthene, benzo-k-fluoranthene, chrysene, dibenzo(a,h)anthracene, fluorene ideno(1,2,3-cd)pyrene, naphthalene, and pyrene; 1-methylnaphthalene and 2-methylnaphthalene shall also be analyzed for and reported. 1-methylnaphthalene was not analyzed for or reported as part of the historical investigations when PAHs were analyzed by SW8270. TCE has been detected above cleanup levels in surface soil (0-2’ bgs) and subsurface. For subsurface, not only will the 0-15’ bgs soil interval have to be addressed, any subsurface soil contamination which is impacting groundwater above Table C cleanup levels will need to be addressed. Also, for vapor intrusion pathway evaluation, up to 100 feet from the solvent contamination to the receptor (current or future) will need to be evaluated for vapor intrusion. 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 GWZ1 includes: Sampling at 10 A-Aquifer wells/well points and 3 B-Aquifer wells, and analysis for VOCs, EDB, 1,2,3-TCP, DRO, PAHs, Alkalinity, Chloride, 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
12/18/2018 CERCLA Proposed Plan ADEC received the Draft Proposed Plan for King Salmon Divert, Site OT027, Groundwater Zone 1, on November 7, 2018. This proposed plan details site characterization and history, summarizes site risks, outlines remedial action objectives, and evaluates seven remedial alternatives. ADEC's comments on the draft plan were sent on this date. Sammi Castle
3/29/2019 Document, Report, or Work plan Review - other ADEC received the Draft 2018 Remedial Action Operations & Land Use Control Inspections, dated March 2019. This report presents analytical and field data collected during the 2018 field season from six groundwater zones, and the institutional controls inspection at Groundwater Zone 6. ADEC submitted comments to the Air Force in a letter on April 19, 2019. Sammi Castle
4/29/2019 Document, Report, or Work plan Review - other ADEC received the Draft Uniform Federal Policy - Quality Assurance Project Plan for Site Inspections of Aqueous Film-Forming Foam Areas, dated April 2019. The purpose of the SI for King Salmon Divert is to evaluate whether a release of AFFF-derived PFAS has occurred to groundwater, soil (shallow and subsurface), surface water, and sediment as a result of historical AFFF use at 11 of the KSD AFFF areas: Building 160, Former Building 152, Building 300, Spray Test Area, Building 617, Eskimo Creek, Red Fox Creek, the Fire Training Areas (FT001, FT002, FT004), and the Former Landfarm and Holding Ponds. ADEC submitted comments on the draft work plan in a letter to the Air Force dated May 17, 2019. Sammi Castle
7/10/2019 Document, Report, or Work plan Review - other ADEC approved the Final 2018 Remedial Action Operations & Land Use Control Inspections, dated May 2019, in a letter to the Air Force on this date. Sammi Castle
8/2/2019 Document, Report, or Work plan Review - other ADEC approved the Final Uniform Federal Policy - Quality Assurance Project Plan for Site Inspections of Aqueous Film-Forming Foam Areas, King Salmon Divert, dated July 2019, in a letter to the Air Force on this date. Sammi Castle
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
6/22/2020 Document, Report, or Work plan Review - other ADEC approved the Final Site Inspection Report of Aqueous Film-Forming Foam Areas, dated June 2020, in a letter on this date. The purpose of this SI is to evaluate whether a release of AFFF-derived PFAS has occurred to soil, surface water, sediment, and groundwater as a result of historical AFFF use at the following 11 areas: Combat Alert Cell, Former Fire Station, Current Fire Station, Spray Test Area, Wastewater Treatment Plant, Eskimo Creek, Red Fox Creek, Fire Training Areas 1, 2, and 4, and the Former Landfarm and Holding Ponds. All areas investigated had PFAS at concentrations above screening levels in some media and will require additional investigation. Sammi Castle
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
4/2/2021 Document, Report, or Work plan Review - other ADEC submitted comments on the Draft Groundwater Zones 1 and 2 Aqueous Film-Forming Foam Remedial Investigation Work Plan, dated March 2021, on a letter on this date. Sammi Castle
4/27/2021 CERCLA RI Plan Approved Final Groundwater Zones 1 and 2 Aqueous Film-Forming Foam Remedial Investigation Work Plan, April 2021 was approved. This Groundwater Zones 1 and 2 Aqueous Film-Forming Foam (AFFF) Remedial Investigation (RI) Work Plan (Work Plan) describes the conceptual site models (CSMs), data quality objectives (DQOs), and proposed sampling methodology and locations for conducting an AFFF RI at six Installation Restoration Program (IRP) sites located within Groundwater Zones 1 and 2, as well as additional investigation at Eskimo Creek, at King Salmon Divert (KSD), Alaska Darren Mulkey
6/8/2021 CERCLA Remedial Action Completion Report ADEC approved Final 2020 Remedial Action Operations & Land Use Control Inspections, Base Living Area (Zone 1), Base Industrial Area (Zone 2), North & South Bluffs & SBTS (Zone 3), Naknek River Storage Area (Zone 4), RAPCON & Red Fox Creek (Zone 5), Naknek Rec Camp I, Naknek Rec Camp II, King Salmon Divert, Alaska, dated June 2021. This report presents analytical and field data collected during the 2020 field season from five groundwater zones at King Salmon Divert, Alaska (KSD), Naknek Rec Camp I, and Naknek Rec Camp II. Darren Mulkey
8/23/2021 Document, Report, or Work plan Review - other The Final 2021 King Salmon Divert RAO LUC WP Addendum was reviewed and an approval letter was sent by ADEC. This 2021 Work Plan Addendum to the 2019 UFP-QAPP describes the field investigation/monitoring and reporting activities to be conducted during the 2021 Remedial Action Operations and Land Use Control Inspections under U. S. Army Corps of Engineers (USACE) Contract No. W911KB19C0015. Sites included in this workplan are: GWZ1, GWZ2, GWZ3, GWZ4, GWZ5, GWZ6, and GWZ7.In addition to sampling groundwater, surface water, and sediment, land use controls (LUCs) have been established to prevent exposure to contaminated media. LUC inspections for five groundwater zones, Naknek Rec Camp I, and Naknek Rec II will be conducted to ensure there have not been any unauthorized excavations or installation of drinking water wells in contaminated aquifers. Annual land fill inspections are also scheduled at the North and South Bluff in Zone 3, and the former landfills in Zone 4 and Zone 6. Additional work in Zone 3 will include barrier fence repair and the installation of signage. The installation and sampling of three groundwater monitoring wells at SA039-DR16 and the installation and sampling of two well points at LF022/SS022 are also included in this work plan. The results of this monitoring effort will be presented in a RA-O and LUC Inspections Report. An evaluation of the nature and extent of contamination with comparison to RAOs will be presented. Conclusions and recommendation based on the monitoring findings will be provided, as appropriate. Ginna Quesada
9/13/2021 Document, Report, or Work plan Review - other ADEC approved Final Work Plan MONITORING WELL INSTALLATION, REPAIR & DECOMMISSIONING for King Salmon Divert, ALASKA dated September 2021. Work will include repairing up to forty-five (45) wells, installing replacement or new monitoring wells at up to five (5) locations, decommissioning up to seventy (70) wells and monitoring points, and replacing well caps where needed in the following sites: GWZ1, GWZ2, GWZ3, GWZ4, GWZ5, and GWZ7. Ginna Quesada
6/30/2022 Risk Assessment Workplan Approved The ADEC approved the King Salmon Divert (Groundwater Zones 1, 2, and 5) and Naknek II Screening-Level Ecological Risk Assessment Work Plan, Final (dated June 2022). The work plan describes the approach to conduct a phased Screening-Level Ecological Risk Assessment across various sites within Naknek II and Groundwater Zones 1, 2, and 5 areas located in King Salmon, Alaska. The objectives of this work plan are to quantitatively and/or qualitatively evaluate baseline or existing exposure and risks to ecological receptors from chemicals released into the environment during site operations. The work plan aims to address a total of seventeen sites for contaminants such as metals, petroleum hydrocarbons, volatile organic compounds, semivolatile organic compounds, polychlorinated biphenyls, per- and polyfluoroalkyl substances, pesticides, dioxins and furans. Ginna Quesada
7/6/2022 Document, Report, or Work plan Review - other DEC reviewed the Draft Monitoring Well Installation, Repair, and Decommissioning Report, King Salmon Divert, Alaska, Dated May 2022. The report describes monitoring well installation, repair and decommissioning activities across various sites in Groundwater Zones 1, 2, 3, 4, 5 and Naknek II, located in King Salmon, Alaska. Activities included replacing a monitoring well (MW00-04R) and a well point (GP-1AR), the installation of three monitoring wells (SA039DR16-01, SA039DR16-02, and SA039DR16-03), and the repair and/or capping of 61 wells. Additionally, seventy- four wells were decommissioned. Ginna Quesada
7/18/2022 Document, Report, or Work plan Review - other ADEC reviewed and submitted comments for the Draft 2021 Remedial Action Operations & Land Use Control Inspections, Base Living Area - Zone 1 (OT027), Base Industrial Area & LF022 - Zone 2 (OT028), North & South Bluffs - Zone 3 (OT029), Naknek River Storage Area - Zone 4 (OT030), Rapcon & Red Fox Creek - Zone 5 (OT031), Naknek Rec Camp I (Rapids Camp), Naknek Rec Camp II (Lake Camp), SA039-DR16 Groundwater Investigation, King Salmon Divert, Alaska, dated June 2022. The report describes the land use control inspections, field data, and analytical results from groundwater and surface water sampling conducted during the 2021 field season for Groundwater Zones 1, 2, 3, 4, 5, Naknek Rec Camp I, and Naknek Rec Camp II in King Salmon, Alaska. Continued groundwater and surface water sampling and land use control (LUC) inspections were recommended for all sites. The groundwater investigation at the SA039-DR16 site, located northwest of Groundwater Zone 2, found no groundwater exceedances of 18 AAC 75.345 Table C groundwater cleanup levels for diesel range organics, residual range organics, and polycyclic aromatic hydrocarbons and site closure was recommended for the site. The report included a 2022 work plan addendum for the upcoming field investigation, monitoring and reporting activities to be conducted during the 2022 remedial action operations and LUC inspections. The work plan addendum addressed the field sampling programs, analytical programs, and land use control inspections planned for each site in King Salmon, Alaska. Additionally, the work plan included a technical memorandum that described the repair process that will be used to manage the section of the South Barrel Bluff gabion wall that is slipping into King Salmon Creek. Ginna Quesada
8/17/2022 Document, Report, or Work plan Review - other ADEC submitted responses to comments received on August 15th 2022 regarding the Draft Monitoring Well Installation, Repair, and Decommissioning Report, King Salmon Divert, Alaska Dated May 2022. Approximately 6 cubic yards of soil cutting material was generated from the monitoring well activities. The approved work plan discussed the soil cutting material getting sampled and characterized prior to disposal, however this report noted historical results were used for characterizing the soil cutting material. Using historical results for characterizing investigative-derived waste is not appropriate, especially when the historical results are for petroleum only and the potentially contaminated media could have impacts from other analytes (per-and polyfluoroalkyl substances and pesticides for example). While the Transport, Treatment, & Disposal Approval forms were submitted retroactively, it is the department’s expectation that these forms be submitted to ADEC for approval prior to the transport and disposal of contaminated media. Per 18 AAC 75.370(b) “A responsible person, owner, or operator shall obtain approval before moving or disposing of soil subject to the site cleanup rules.” ADEC approval was not obtained prior to transporting the soil cutting material offsite. Ginna Quesada
9/8/2022 Document, Report, or Work plan Review - other ADEC approved the Final 2021 Remedial Action Operations & Land Use Control Inspections, Base Living Area - Zone 1 (OT027), Base Industrial Area & LF022 - Zone 2 (OT028), North & South Bluffs - Zone 3 (OT029), Naknek River Storage Area - Zone 4 (OT030), Rapcon & Red Fox Creek - Zone 5 (OT031), Naknek Rec Camp I (Rapids Camp), Naknek Rec Camp II (Lake Camp), SA039-DR16 Groundwater Investigation, King Salmon Divert, Alaska, dated August 2022. The report describes the land use control inspections, field data, and analytical results from groundwater and surface water sampling conducted during the 2021 field season for Groundwater Zones 1, 2, 3, 4, 5, Naknek Rec Camp I, and Naknek Rec Camp II in King Salmon, Alaska. Continued groundwater and surface water sampling and land use control (LUC) inspections were recommended for all sites. The groundwater investigation at the SA039-DR16 source area, located northwest of Groundwater Zone 2, found no groundwater exceedances of 18 AAC 75.345 Table C groundwater cleanup levels for diesel range organics, residual range organics, and polycyclic aromatic hydrocarbons and site closure was recommended for the site. ADEC is tracking SA039-DR16 as a source area part of the King Salmon AS GWZ 2 SA039 (ADEC File No. 2569.38.016.10). Based on the available information, SA039-DR16 does not need further investigation at this time, and ADEC will consider the source area cleaned up. However the King Salmon AS GWZ 2 SA039 site will remain active on the database until all other source areas within SA039 are ready for closure. The report included a 2022 work plan addendum for the upcoming field investigation, monitoring and reporting activities to be conducted during the 2022 remedial action operations and LUC inspections. The work plan addendum addressed the field sampling programs, analytical programs, and land use control inspections planned for each site in King Salmon, Alaska. Additionally, the work plan included a technical memorandum that described the repair process that will be used to manage the section of the South Barrel Bluff gabion wall that is slipping into King Salmon Creek. Ginna Quesada
9/15/2022 Offsite Soil or Groundwater Disposal Approved ADEC approved the Contaminated Media Transport and Treatment or Disposal Approval Form for the disposal of 9 cubic feet of contaminated GAC sourced from Groundwater Zones 1, 2, and 4. The GAC contaminated with DRO, GRO, BTEX, TCE, and PFAS is being sent to U.S. Ecology in Anchorage to be disposed of at the Columbia Ridge Facility in Arlington Oregon. Two 5-gallon spent granular activated carbon (GAC) filters are being shipped off-site for disposal. One filter was used to filter purge and decon water from approximately 30 wells in 2021 and one filter will be used to do the same in September, 2022. Approximately 25% of those have contaminants present (mostly DRO and GRO). Approximately 6 to 8 wells have TCE with concentrations ranging 3 to 65 micrograms/liter and contribute 10 to 15 gallons of purge water. Each GAC will have treated approximately 60 gallons of water. Ginna Quesada
9/30/2022 Document, Report, or Work plan Review - other ADEC approved the Final Monitoring Well Installation, Repair, and Decommissioning Report, King Salmon Divert, Alaska dated August 2022. The report describes monitoring well installation, repair and decommissioning activities across various sites in Groundwater Zones 1, 2, 3, 4, 5 and Naknek II, located in King Salmon, Alaska. Activities included replacing a monitoring well (MW00-04R) and a well point (GP-1AR), the installation of three monitoring wells (SA039DR16-01, SA039DR16-02, and SA039DR16-03), and the repair and/or capping of 61 wells. Additionally, seventy- four wells were decommissioned. Ginna Quesada
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
5/16/2023 Document, Report, or Work plan Review - other DEC reviewed and submitted comments regarding the Uniform Federal Policy Quality Assurance Project Plan Supplemental Remedial Investigations: Groundwater Zone 1 (OT027), Fuel Seepage- Eskimo Creek (SS011), and POL Tanks 11, 12, 13, and 14 (SS015) and Site Characterization of Wastewater Lagoon Releases, Draft, dated April 2023. The work plan describes the procedures and methods to conduct field investigations for the Fuel Seepage Eskimo Creek (SS011), POL Tanks 11, 12, 13, and 14 (SS015), and Wastewater Lagoon sites located in Groundwater Zone 1 in King Salmon, Alaska. The goal of the proposed work is to resolve existing data gaps from previous investigations and define the nature, extent, and risk associated with existing contamination at the sites. Ginna Quesada
5/18/2023 Site Visit DEC conducted a site visit with the U.S. Air Force. Ginna Quesada
6/5/2023 Document, Report, or Work plan Review - other DEC reviewed and provided comments regarding the Draft 2022 Remedial Action Operations & Land Use Control Inspections, Base Living Area – Zone 1 (OT027), Base Industrial Area & LF022 – Zone 2 (OT028), North and South Bluffs – Zone 3 (OT029), Naknek River Storage Area – Zone 4 (OT030), RAPCON & Red Fox Creek – Zone 5 (OT031), Naknek Rec Camp I, Naknek Rec Camp II, King Salmon Divert, Alaska, dated May 2023. The report describes the field activities conducted during the 2022 field season and summarizes the analytical data. The report recommended continued monitoring and land use control inspections for all the sites. Ginna Quesada
6/22/2023 Document, Report, or Work plan Review - other DEC provided responses to comments for the Uniform Federal Policy Quality Assurance Project Plan Supplemental Remedial Investigations: Groundwater Zone 1 (OT027), Fuel Seepage- Eskimo Creek (SS011), and POL Tanks 11, 12, 13, and 14 (SS015) and Site Characterization of Wastewater Lagoon Releases, Draft, dated April 2023. Ginna Quesada
6/28/2023 Document, Report, or Work plan Review - other DEC approved the Uniform Federal Policy Quality Assurance Project Plan Supplemental Remedial Investigations: Groundwater Zone 1 (OT027), Fuel Seepage- Eskimo Creek (SS011), and POL Tanks 11, 12, 13, and 14 (SS015) and Site Characterization of Wastewater Lagoon Releases, Final, dated June 2023. Ginna Quesada
8/24/2023 Document, Report, or Work plan Review - other DEC provided comments regarding the Draft Fourth Five-Year Review Sites OT027 (SS011, ST015); OT028 (LF022); OT029 (LF005, LF014); OT030 (LF008, SS012); Naknek Recreation Camp I – LF003 King Salmon Divert, Alaska Naknek Recreation Camp I, Alaska, Dated July 2023. This five-year review describes the selected remedies and the status of their implementation for Groundwater Zone 1 (OT027), Eskimo Creek Seeps (SS011), POL Tanks (ST015), Groundwater Zone 2 (OT028), Eskimo Creek Dump Site (LF022), Groundwater Zone 3 (OT029), South Bluff (LF005), North Bluff (LF014), Groundwater Zone 4 (OT030), Landfill No. 5 (LF008), Naknek River Storage Sites (SS012), and Groundwater Zone 6 Naknek Recreation Camp I (LF003) sites located in King Salmon, Alaska. The review focuses on identifying issues and providing recommendations for improving the performance of selected remedies that were recorded in the King Salmon Records of Decision (RODs). Protectiveness determinations were made for each site to identify the extent that each selected remedy is securing the protection of human health and the environment. Ginna Quesada
10/27/2023 Document, Report, or Work plan Review - other DEC approved the Final 2023-2024 Remedial Action Operations & Land Use Control Inspections, Groundwater Zone 1 (Base Living Area) Groundwater Zone 2 (Base Industrial Area) Groundwater Zone 3 (North and South Bluffs) Groundwater Zone 4 (Naknek River Storage) Groundwater Zone 5 (RAPCON & Red Fox Creek) Groundwater Zone 6 (Naknek I) Groundwater Zone 7 (Naknek II) King Salmon Divert, Alaska, Dated October 2023.The work plan describes the planned field activities for the 2023 and 2024 field seasons at the Base Living Area (OT027), Base Industrial Area & LF022 (OT028), North and South Bluffs (OT029), Naknek River Storage Area (OT030), RAPCON & Red Fox Creek (OT031), Naknek Rec Camp I, and Naknek Rec Camp II sites located in King Salmon, Alaska. The planned scope of work includes land use inspections, free product recovery, and the continued monitoring of groundwater, surface water, and sediment. Ginna Quesada
2/22/2024 Document, Report, or Work plan Review - other DEC reviewed the Remedial Investigation Report: Phase I AFFF Remedial Investigation (Groundwater Zones 1 and 2 Sites FFS, STA, CAC, CFS, WTP, and LHP) and Expanded Remedial Investigation (Groundwater Zone 5 Sites FT001/FT001P, FT002/FT002P, and FT004/FT004P) Draft, dated January 2024. The report describes the phase I remedial investigation efforts to delineate the extent of per and polyfluoroalkyl substances (PFAS) across nine sites in groundwater zones 1, 2, and 5 located in King Salmon, Alaska. PFAS exceedances of screening levels were encountered across all sites in groundwater, soil, sediment, and surface water. The report recommends a supplemental remedial investigation to further examine the risk and further characterize the extent of contamination for all nine sites. Ginna Quesada
4/17/2024 Document, Report, or Work plan Review - other DEC approved the Final Fourth Five-Year Review Sites OT027 (SS011, ST015); OT028 (LF022); OT029 (LF005, LF014); OT030 (LF008, SS012); Naknek Recreation Camp I – LF003 King Salmon Divert, Alaska Naknek Recreation Camp I, Alaska, dated April 2024. Ginna Quesada
4/17/2024 CERCLA Proposed Plan DEC approved the Final Fourth Five-Year Review Sites OT027 (SS011, ST015); OT028 (LF022); OT029 (LF005, LF014); OT030 (LF008, SS012); Naknek Recreation Camp I – LF003 King Salmon Divert, Alaska Naknek Recreation Camp I, Alaska, dated April 2024. Ginna Quesada
5/1/2024 Document, Report, or Work plan Review - other DEC approved the Remedial Investigation Report: Phase I AFFF Remedial Investigation (Groundwater Zones 1 and 2 Sites FFS, STA, CAC, CFS, WTP, and LHP) and Expanded Remedial Investigation (Groundwater Zone 5 Sites FT001/FT001P, FT002/FT002P, and FT004/FT004P) Final, dated April 2024. Ginna Quesada
7/30/2024 Document, Report, or Work plan Review - other DEC approved the Work Plan Addendum PFAS Phase I Remedial Investigation for Groundwater Zone 1: Groundwater Investigation – Round 1 Final, dated July 2024. The work plan describes the proposed methods for the phase I remedial investigation of per and polyfluoroalkyl substances (PFAS) in groundwater zone 1 located in King Salmon, Alaska. This work plan is an addendum to the King Salmon Divert Uniform Federal Policy-Quality Assurance Project Plan, PFAS Supplemental Remedial Investigations for Groundwater Zones 2 and 5 and PFAS Phase I Remedial Investigation for Groundwater Zone 1. The objective of this investigation is to further define the extent of upgradient contamination in groundwater. The findings from this work will be used to guide subsequent soil and groundwater investigations. 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
10/28/2024 Document, Report, or Work plan Review - other DEC provided comments regarding the Supplemental Remedial Investigation Report for Groundwater Zone 1 (OT027), SS011, and SS015 Draft, dated October 2024. The report describes the supplemental investigation efforts to delineate the extent of trichloroethene (TCE) and diesel range organics (DRO) at groundwater zone 1 (OT027), the Eskimo Creek Seeps (SS011), and POL Storage Tanks (SS015) sites located in King Salmon, Alaska. Samples were collected from groundwater, soil, sediment, and surface water and analyzed for DRO, polycyclic aromatic hydrocarbons (PAHs), volatile organic compounds (VOCs), and semi volatile organic compounds (SVOCs). Screening levels for the investigation were the November 2023 EPA Regional Screening Levels (RSLs) for residential soil (excess lifetime cancer risk of 1 × 10-6 and hazard quotient of 0.1) or 1/10 of the 2023 18 AAC 75 Method Two human health DEC cleanup levels. PAHs and DRO exceeded screening criteria in soil in the saturated zone or in the vadose zone. Solvent and fuel related compounds were identified as contaminants of concern in groundwater at OT027 and SS015 but not at SS011. The report recommends a supplemental remedial investigation to further examine the vapor intrusion risks at the site. Ginna Quesada
11/19/2024 Document, Report, or Work plan Review - other DEC submitted comments regarding the Site Characterization of Wastewater Lagoon Releases, Draft, dated October 2024. The report describes the investigation activities conducted in 2023 to characterize the nature and extent of contamination related to the wastewater lagoon releases adjacent to the wastewater treatment system at Groundwater Zone 1 (OT027) located in King Salmon, Alaska. A human health risk assessment and ecological risk assessment were included in this report. Samples were collected from groundwater, soil, sediment, and surface water and analyzed for petroleum fractions, metals, perfluoro alkylated substances (PFAS). polycyclic aromatic hydrocarbons (PAHs), volatile organic compounds (VOCs), and semi volatile organic compounds (SVOCs). Screening levels for the investigation were the November 2023 EPA Regional Screening Levels (RSLs) for residential soil (excess lifetime cancer risk of 1 × 10-6 and hazard quotient of 0.1) or 1/10 of the 2023 18 AAC 75 Method Two human health DEC cleanup levels. The risk assessment determined that diesel range organics and magnesium were contaminants of concern in groundwater at the site. Additionally, residual range organics exceeded DEC’s groundwater cleanup level. Various PFAS analytes were determined to be contaminants of potential concern in groundwater and soil. The report recommended the decommissioning of the wastewater treatment lagoons and proceeding with a supplementary investigation to address existing data gaps regarding PFAS contamination at the site along with supplementary human health and ecological risk assessments. Ginna Quesada

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State of Alaska Department of Environmental Conservation

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Phone: 907-465-5066
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