Site Report: King Salmon AS GWZ 1 SS015 POL Tanks

Site Name:	King Salmon AS GWZ 1 SS015 POL Tanks
Address:	SS15 POL AST Tanks 11-14 Silver Street, Groundwater Zone 1 (OT027), King Salmon, AK 99613
File Number:	2569.38.015.03
Hazard ID:	511
Status:	Active
Staff:	Ginna Quesada, 9074515960 ginna.quesada@alaska.gov
Latitude:	58.694444
Longitude:	-156.669167
Horizontal Datum:	NAD27

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

Site Chronology
IC / Closure Details
Documents
Associated Sites

Problems/Comments

Groundwater Zone 1 (OT27) consists of: Dry Well (DP023), Petroleum, Oil, and Lubricant (POL) Tanks (SS015), Eskimo Creek Seeps (SS011), Waste Accumulation Area No. 2 (SS016), MOGAS Station (SS019). The POL area contains four aboveground storage tanks (ASTs), designated AST 11, AST 12, AST 13, and AST 14, with secondary containment for individual and multiple tanks. ASTs 11 and 12 each have a 214,000-gallon capacity; AST 13 has a 516,000-gallon capacity; and AST 14 can hold 105,000 gallon. Fuel spills and releases from the tank farm into surrounding soil and groundwater, adjacent wetlands, and Eskimo Creek. Operation dates from pre-1950 to present. An estimated 14,000 to 54,000 cubic feet (105,000 to 404,000 gallons) of floating petroleum product is present on the water table at Groundwater Zone 1. The contamination encompasses an area of approximately 410,000 square feet. The POL storage area site is located north of the intersection of Storage Road and Silver Street. The POL area contains 4 ASTs, designated AST 11, AST 12, AST 13, and AST 14, with secondary containment for individual and multiple tanks. ASTs 11 and 12 each have a 214,000-gallon capacity; AST 13 has a 516,000-gallon capacity; and AST 14 can hold 105,000 gallons. Past and present tank contents include JP-4, diesel fuel, and possibly gasoline. Three of the tanks have been taken out of service and one remaining tank has been reconditioned in accordance with ASTM standards. For groundwater zone information and Record of Decision details, see Zone 1 and SS11.

Action Information

Action Date	Action	Description	DEC Staff
9/15/1985	Preliminary Assessment Approved	Phase I - Records Search and Site Prioritization.	Former Staff
6/15/1986	Update or Other Action	Phase II - Task I Pre-Survey Report, Shemya Air Force Base and King Salmon Air Force Base.	Former Staff
7/20/1988	Update or Other Action	(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Quality Assurance Project Plan by Jeff Hock and Mike Lewis of ADEC dated 7/20/88 indicates Tank Farm at KS Air Base located adjacent to Naknek River has fuel leaking from ground next to facility.	Former Staff
9/20/1988	Update or Other Action	(Old R:Base Action Code = MS - Monitoring/Sampling). Public Water Supply-Analytical Report by ADEC Douglas Lab indicating less than detection limits of sample from drinking water supply, but water well or supply not documented.	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
8/25/1989	Update or Other Action	(Old R:Base Action Code = PER - Permit Action at Site). Application for Wastewater Discharge Permit, Oil/Water Separator Project on Naknek River, King Salmon Airport, Alaska, August 25, 1989 by Patrick M. Coullahan, Lieutenant Colonel, USAF, Commander; States that petroleum contaminated water seeps out of soil 100 feet from Naknek River near old petroleum storage area and flows into river at 0.5 to 2 gallons per minute.	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, Eskimon 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	Update or Other Action	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
4/24/1990	Site Ranked Using the AHRM	Initial ranking.	Former Staff
9/1/1990	Update or Other Action	(Old R:Base Action Code = FI - Field Inspection (General)). Another tank began leaking and additional bunker C oil is surfacing per Army Corps of Engineers notification.	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 tyhpe 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
8/9/1991	Site Number Identifier Changed	Old# 88210133703 New# 88250133703 Western district now.	Louis Howard
1/1/1992	Site Added to Database	Fuel spills.	Louis Howard
3/20/1992	Update or Other Action	File updated significantly by ADEC from new found file information.	Louis Howard
7/15/1992	Update or Other Action	Remedial Investigation / Feasibility Study at Eleven Sites, final report (3 volumes, dated September 1993). Total petroleum hydrocarbons were detected in several soil samples collected at the site. No GW samples were collected, however, the TPH present in the soil immediately above the GW suggests that GW in the area is contaminated. Recommended action - conduct additional soil investigation to further evaluate the extent of TPH contaminated soil. GW - additional study of GW in the area be undertaken as par of studies underway at the Eskimo Creek Site. Additional information is necessary to define the extent of TPH that exceed ADEC guidance for cleanup levels. Suspected TPH in GW extends beyond the site and is likely comingling with at least one other GW plume originating from a different source. Study of multiple source comingled plumes can be done more efficiently when conducted together. See site file for additional information.	Louis Howard
8/6/1992	Notice of Violation	Notice of Violation letter dated August 12, 1992 to 643 SPTS/CC Air Force (Lt. Colonel Jimmy Harris) from ADEC (Michael Lewis, District Engineer) regarding the sanitary sewer Notice of Violation issued August 6, 1992, ADEC Permit Number 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	Groundwater Monitoring Performed October 1992 (dated April 7, 1993)	Louis Howard
7/22/1993	Update or Other Action	Compliance Advisory letter dated July 22, 1993 to Air Force 11 Civil Engineer Operations Commander (Lt. Colonel Patrick Coullahan) from ADEC (Ronald Klein, Contaminated Site Programs Supervisor) based on information in the Report of Investigation of Current Practices Under and Aboveground POL Storage Tank Operations at King Salmon Airport dated April 1993. The Air Force response letter is dated August 19, 1993.	Louis Howard
12/15/1993	Update or Other Action	King Salmon Air Station, Analytical Results: Private Water Wells (dated March 1, 1994)	Louis Howard
5/15/1994	Update or Other Action	King Salmon Air Station, Analytical Results: Private Water Wells verification sampling program	Louis Howard
6/30/1994	Update or Other Action	Basewide 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
6/15/1995	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
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. POL Storage Tanks (SSO15) The POL tanks appear to be the primary source of petroleum contamination in and on the water table and Eskimo Creek wetlands. The free product plume decreased in size over the past five years. In particular, a significant reduction in plume size coincided with the base drawdown. The recovery wells are located in areas where non-recoverable amounts of free product are present. The main migration direction for free product is eastward from the POL Storage Tanks, although migration westward from the tanks is also possible. Product migration may preferentially follow zones of higher aquifer permeability. The dissolved phase petroleum plume has decreased slightly in the past two years. Eskimo Creek (5501I1) Wetlands at Eskimo Creek are contaminated with petroleum. The wetlands are affected by petroleum contamination originating at the POL Storage Tanks. See site file for additional information.	Louis Howard
9/13/1995	Update or Other Action	(Old R:Base Action Code = RIFS - Remedial Investigation / Feasibility Study). RIFS action added by Shannon and Wilson on 3/13/97, based on Relative Risk Evaluation Worksheet dated 9/13/95. Actual current phase is Feasibility Study. Pathway: groundwater to SS11 plume to wetlands, to Eskimo Creek (during flooding events). Receptors: mammals and birds in wetlands; red salmon fisheries/commercial and subsistence fishers.	S&W-Miner
6/15/1996	Update or Other Action	Final Installation-wide Environmental Baseline Survey	Louis Howard
6/15/1996	Interim Removal Action Approved	COE installed product recovery systems at Eskimo Creek to intercept and remove separate-phase petroleum product seeping into adjacent wetlands	Former Staff
10/15/1996	Update or Other Action	Final Field Report for Spring 1996, Human Food Chain, Aquatic Biota, and Wetlands Evaluation report	Louis Howard
11/15/1996	Update or Other Action	Aerial Photographic Analysis, King Salmon Airport Study Area. Prepared by EPA Region 10, Research and Development, Characterization, Research Division, TS-PIC-9710003S, dated November 1996.	Gretchen Pikul
12/6/1996	Update or Other Action	Community Relations Plan for King Salmon Airport and Naknek Recreation Camps 1 and 2 (draft dated December 1996, final dated May 1997)	Gretchen Pikul
1/15/1997	Update or Other Action	Preliminary Report, Human Food Chain, Aquatic Biota, and Wetlands Evaluation report	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
4/15/1997	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, received October 28, 1997) and accompanying documents.	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
10/30/1997	Update or Other Action	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). Following two years of monitored natural attenuation investigations in 1997 and 1998, it was necessary to revise the remedial action; an updated proposed plan was issued August 8, 1999.	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
5/12/1998	Update or Other Action	Final King Salmon USTs - Sumary of UST Site Historical Information, dated April 20, 1998, site included	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
8/13/1998	Meeting or Teleconference Held	Public Meeting for Modified Risk Assessment on Groundwater Zone 1 Buildings (#647 and #649)	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
2/24/1999	Update or Other Action	Final Tier II Ecological Risk Assessment for Piscivorous Wildlife Inhabiting Eskimo Creek report (dated May 1997)	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, systems operate during warm months	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	Groundwater Monitoring Report, Groundwater Zone 1, 1997 (draft dated January 1999, final dated July 1999)	Gretchen Pikul
8/30/1999	Proposed Plan	Final Proposed Plan for Interim Remedial Action, Groundwater Zone 1	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 yet)	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
5/18/2000	Update or Other Action	Groundwater Zone 1 Interim Record of Decision - draft dated April 2000; ADEC initial management briefing meeting on 4-27-00; initial ADEC comments dated 5-3-00; comment resolution meeting on 5-18-00; draft final version dated *, received on ; ADEC management briefing meeting on ; final version dated , received on ; ADEC signed on ; Air Force signed on **.	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	Site Ranked Using the AHRM	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	Record of Decision	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	Long Term Monitoring Established	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
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	Final Intrinsic Remediation Report - Groundwater Zone 1 - 1998 (draft dated April 1999 and received on 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	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, ADEC comment letter on 2nd version dated November 7, 2000, final report dated December 2000, received on February 5, 2001)	Gretchen Pikul
2/5/2001	Update or Other Action	Groundwater Monitoring Report, Groundwater Zone 1, 1998 Results (draft dated April 1999, final dated December 2000, received on February 5, 2001)	Gretchen Pikul
2/5/2001	Update or Other Action	Intrinsic Remediation Report - Groundwater Zone 1 - 1998 (final dated December 2000, received 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
3/1/2001	Update or Other Action	2000 Limited Field Investigation at Eskimo Creek Treatment System Seeps report (draft dated December 21, 2000, received January 2, 2001 ADEC comment letter dated March 1, 2001)	Gretchen Pikul
4/15/2001	Update or Other Action	Eskimo Creek Seeps 1 and 2 Monthly Monitoring, Discharge Monitoring Report - January 2001 (dated March 15, 2001, received on April 5, 2001, ADEC comment letter dated April 15, 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
4/25/2001	Update or Other Action	Eskimo Creek Treatment Facility Monthly Monitoring Report - February 2001 (dated April 10, 2001)	Gretchen Pikul
5/7/2001	Update or Other Action	Eskimo Creek Treatment Facility Monthly Monitoring Report - March 2001 (dated May 2, 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
7/25/2001	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
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
1/8/2002	Update or Other Action	Management Action Plan (draft dated January 2001; ADEC comment letter dated April 3, 2001; response to comments received June 11, 2001; comment resolution meeting on August 29, 2001; final report dated October 2001 and received on January 8, 2002; not all comments documented within the response to comments as being addressed are addressed within the final report; discussions with the Air Force continue on this issue).	Gretchen Pikul
4/9/2002	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
1/28/2003	GIS Position Updated	Updated Quadrangle, Latitude, Longitude, Section, Township, and Range fields using TopoZone.com and site maps.	Former Staff
4/23/2003	Update or Other Action	Remedial System Design for Groundwater and Vadose Zone Remediation at POL Tanks SS015 draft dated March 2003 and received on March 4, 2003; ADEC comment letter dated March 20, 2003; Air Force response to comments received and ADEC approval letter dated March 20, 2003; additional comments and responses received on and updated ADEC approval letter sent on March 21, 2003; final dated April and received on April 23, 2003.	Gretchen Pikul
5/2/2003	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.	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
2/4/2004	Meeting or Teleconference Held	Meeting/teleconference on the Zone 1 pilot test biovent system status.	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	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	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	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
6/3/2004	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 and received on June 3, 2004.	Gretchen Pikul
6/8/2004	Update or Other Action	Fact Sheet for King Salmon Air Station Environmental Restoration Project; draft fact sheet received and ADEC comments sent on April 16; Air Force Comment Response received on May 25; final dated and received in June 2004.	Gretchen Pikul
7/16/2004	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.	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
8/26/2004	Update or Other Action	Bioventing Pilot Test Report – Remedial Design for Groundwater and Vadose Zone Remediation at POL Tanks SS015; draft dated May 2004 and received on June 3, 2004; final CD version only (dated July 2004) received on July 26, 2004; final report dated July 2004 and received on August 26, 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
11/15/2004	Meeting or Teleconference Held	Remedial Process Optimization (RPO) team met with Air Force, ADEC, and EPA at at contractor's office in San Antonio TX - November 8-12, 2004. The primary purpose of this meeting was to evaluate the current status of cleanup efforts at the King Salmon AS and draft the RPO report due in March 2005.	Jeff Norberg
6/16/2006	Update or Other Action	Implementation of Remedial Process Optimization (RPO) Recommendations Report; draft dated March 2005 received March 30, 2005; ADEC comment letter dated May 16, 2005; Air Force Comment Response and ADEC approval letter issued on May 20, 2005; final dated June 2006 received on June 16, 2006.	Jeff Norberg
1/26/2007	Update or Other Action	File number issued 2569.38.015.03.	Aggie Blandford
4/21/2008	Exposure Tracking Model Ranking	Initial ranking with ETM completed.	Jonathan Schick
4/14/2011	Document, Report, or Work plan Review - other	Contaminated Sites Staff recieved the Draft Work Plan for Monitoring Well Decommissioning and Repair for all sites across the King Salmon Installation.	Jonathan Schick
6/21/2011	Update or Other Action	Contaminated Sites Staff recieved responses to our comments on the Draft Work Plan for Monitoring Well Decommissioning and Repair. The responses were acceptable and the plan should be approved to be implemented in the field.	Jonathan Schick
6/23/2011	Update or Other Action	Contaminated Sites Staff recieved the Final Version of the Work Plan for Monitoring Well Decommissioning and Repair for all sites across King Salmon Air Station. The Comments from the Draft Version of the Plan were addressed in the response to comments and in the Final Version of the document.	Jonathan Schick
8/26/2011	Document, Report, or Work plan Review - other	Contaminated Sites Staff recieved the Summary Report for Monitoring Well Decommissioning and Repair for King Salmon. The monitoring wells that were worked on during this program were located in all of the groundwater zones and at many of the individual sites at the installation. The report contained a short narrative, but mostly presented the outcome of the program through before and after photographs for each well location where work was performed.	Jonathan Schick
8/29/2011	Document, Report, or Work plan Review - other	Contaminated Sites Staff submitted a letter to the AIr Force's Project Manager approving the final report for the Monitoring Well Decommissioning project. The report detailed the 2011 activites at the sites across many areas at King Salmon Air Station.	Jonathan Schick
11/17/2016	Update or Other Action	The AF is aware that a final ROD needs to be prepared for Zone 1. The closest groundwater monitoring wells to the POL tanks (SS015) included in the current groundwater monitoring program are MW-41 (~100 feet to the SE) in aquifer B and MW-6 (~200 feet to the SSE) in aquifer A. MW-41 is consistently one of the hottest wells in groundwater Zone 1 for TCE and DRO. It is unknown if this if from site SS015 or other CS sites in the vicinity.	Holly Weiss-Racine
2/15/2017	Update or Other Action	3rd 5YR received for review and comment. Issues for Zone 1 identified during this review were: Land use controls (LUCs) listed in Section 2.5 of the first Five-Year Review (USAF,2006) have not been fully implemented. The ROD for Zone 1 has not been finalized. An updated HHRA was performed for Zone 1 groundwater in 2015 to assess current conditions and evaluate updated TCE toxicity values. In 2014, the State of Alaska published revised guidance for TCE exposures for women of child-bearing age. For groundwater, this guidance recommends TCE exposure levels greater than 0.0025 micrograms per liter should not occur for this receptor group, which is lower than the RAO identified for Zone 1. However, this recommendation is specific to women of child-bearing age who are directly exposed to TCE and not just considered as potential future receptors. RAOs presented in the Zone 1 ROD utilized criteria presented from 18 AAC 75 for groundwater and 18 AAC 70 for surface water (Table 2-2). Revisions to 18 AAC 75 in 2015 and 18 AAC 70 in 2012 have not changed any of the RAOs for COCs in the B-Aquifer groundwater and surface water. For the A-Aquifer, the cleanup levels were increased by a factor of 10 because the A-Aquifer is not used as a drinking water source. The use of the factor of 10 increase is no longer promulgated by ADEC. Therefore, the RAOs for the A-Aquifer may not be protective of groundwater. However, LUCs were required as part of the remedies for sites within Zone 1. The LUCs restrict the installation of drinking water wells within the A- and B-Aquifers in Zone 1, and restricting groundwater use or contact. Therefore, the remedy remains protective of human health. For sediment, the ecological criteria presented as RAOs represent current guidance. See site file for additional information.	Louis Howard
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
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
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
6/22/2023	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
10/28/2024	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

Action Date

Action

Description

DEC Staff

9/15/1985

Preliminary Assessment Approved

Phase I - Records Search and Site Prioritization.

Former Staff

6/15/1986

Update or Other Action

Phase II - Task I Pre-Survey Report, Shemya Air Force Base and King Salmon Air Force Base.

Former Staff

7/20/1988

Update or Other Action

(Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Quality Assurance Project Plan by Jeff Hock and Mike Lewis of ADEC dated 7/20/88 indicates Tank Farm at KS Air Base located adjacent to Naknek River has fuel leaking from ground next to facility.

Former Staff

9/20/1988

Update or Other Action

(Old R:Base Action Code = MS - Monitoring/Sampling). Public Water Supply-Analytical Report by ADEC Douglas Lab indicating less than detection limits of sample from drinking water supply, but water well or supply not documented.

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

8/25/1989

Update or Other Action

(Old R:Base Action Code = PER - Permit Action at Site). Application for Wastewater Discharge Permit, Oil/Water Separator Project on Naknek River, King Salmon Airport, Alaska, August 25, 1989 by Patrick M. Coullahan, Lieutenant Colonel, USAF, Commander; States that petroleum contaminated water seeps out of soil 100 feet from Naknek River near old petroleum storage area and flows into river at 0.5 to 2 gallons per minute.

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, Eskimon 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

Update or Other Action

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

4/24/1990

Site Ranked Using the AHRM

Initial ranking.

Former Staff

9/1/1990

Update or Other Action

(Old R:Base Action Code = FI - Field Inspection (General)). Another tank began leaking and additional bunker C oil is surfacing per Army Corps of Engineers notification.

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 tyhpe 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

8/9/1991

Site Number Identifier Changed

Old# 88210133703 New# 88250133703 Western district now.

Louis Howard

1/1/1992

Site Added to Database

Fuel spills.

Louis Howard

3/20/1992

Update or Other Action

File updated significantly by ADEC from new found file information.

Louis Howard

7/15/1992

Update or Other Action

Remedial Investigation / Feasibility Study at Eleven Sites, final report (3 volumes, dated September 1993). Total petroleum hydrocarbons were detected in several soil samples collected at the site. No GW samples were collected, however, the TPH present in the soil immediately above the GW suggests that GW in the area is contaminated. Recommended action - conduct additional soil investigation to further evaluate the extent of TPH contaminated soil. GW - additional study of GW in the area be undertaken as par of studies underway at the Eskimo Creek Site. Additional information is necessary to define the extent of TPH that exceed ADEC guidance for cleanup levels. Suspected TPH in GW extends beyond the site and is likely comingling with at least one other GW plume originating from a different source. Study of multiple source comingled plumes can be done more efficiently when conducted together. See site file for additional information.

Louis Howard

8/6/1992

Notice of Violation

Notice of Violation letter dated August 12, 1992 to 643 SPTS/CC Air Force (Lt. Colonel Jimmy Harris) from ADEC (Michael Lewis, District Engineer) regarding the sanitary sewer Notice of Violation issued August 6, 1992, ADEC Permit Number 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

Groundwater Monitoring Performed October 1992 (dated April 7, 1993)

Louis Howard

7/22/1993

Update or Other Action

Compliance Advisory letter dated July 22, 1993 to Air Force 11 Civil Engineer Operations Commander (Lt. Colonel Patrick Coullahan) from ADEC (Ronald Klein, Contaminated Site Programs Supervisor) based on information in the Report of Investigation of Current Practices Under and Aboveground POL Storage Tank Operations at King Salmon Airport dated April 1993. The Air Force response letter is dated August 19, 1993.

Louis Howard

12/15/1993

Update or Other Action

King Salmon Air Station, Analytical Results: Private Water Wells (dated March 1, 1994)

Louis Howard

5/15/1994

Update or Other Action

King Salmon Air Station, Analytical Results: Private Water Wells verification sampling program

Louis Howard

6/30/1994

Update or Other Action

Basewide 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

6/15/1995

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

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. POL Storage Tanks (SSO15) The POL tanks appear to be the primary source of petroleum contamination in and on the water table and Eskimo Creek wetlands. The free product plume decreased in size over the past five years. In particular, a significant reduction in plume size coincided with the base drawdown. The recovery wells are located in areas where non-recoverable amounts of free product are present. The main migration direction for free product is eastward from the POL Storage Tanks, although migration westward from the tanks is also possible. Product migration may preferentially follow zones of higher aquifer permeability. The dissolved phase petroleum plume has decreased slightly in the past two years. Eskimo Creek (5501I1) Wetlands at Eskimo Creek are contaminated with petroleum. The wetlands are affected by petroleum contamination originating at the POL Storage Tanks. See site file for additional information.

Louis Howard

9/13/1995

Update or Other Action

(Old R:Base Action Code = RIFS - Remedial Investigation / Feasibility Study). RIFS action added by Shannon and Wilson on 3/13/97, based on Relative Risk Evaluation Worksheet dated 9/13/95. Actual current phase is Feasibility Study. Pathway: groundwater to SS11 plume to wetlands, to Eskimo Creek (during flooding events). Receptors: mammals and birds in wetlands; red salmon fisheries/commercial and subsistence fishers.

S&W-Miner

6/15/1996

Update or Other Action

Final Installation-wide Environmental Baseline Survey

Louis Howard

6/15/1996

Interim Removal Action Approved

COE installed product recovery systems at Eskimo Creek to intercept and remove separate-phase petroleum product seeping into adjacent wetlands

Former Staff

10/15/1996

Update or Other Action

Final Field Report for Spring 1996, Human Food Chain, Aquatic Biota, and Wetlands Evaluation report

Louis Howard

11/15/1996

Update or Other Action

Aerial Photographic Analysis, King Salmon Airport Study Area. Prepared by EPA Region 10, Research and Development, Characterization, Research Division, TS-PIC-9710003S, dated November 1996.

Gretchen Pikul

12/6/1996

Update or Other Action

Community Relations Plan for King Salmon Airport and Naknek Recreation Camps 1 and 2 (draft dated December 1996, final dated May 1997)

Gretchen Pikul

1/15/1997

Update or Other Action

Preliminary Report, Human Food Chain, Aquatic Biota, and Wetlands Evaluation report

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

4/15/1997

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, received October 28, 1997) and accompanying documents.

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

10/30/1997

Update or Other Action

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). Following two years of monitored natural attenuation investigations in 1997 and 1998, it was necessary to revise the remedial action; an updated proposed plan was issued August 8, 1999.

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

5/12/1998

Update or Other Action

Final King Salmon USTs - Sumary of UST Site Historical Information, dated April 20, 1998, site included

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

8/13/1998

Meeting or Teleconference Held

Public Meeting for Modified Risk Assessment on Groundwater Zone 1 Buildings (#647 and #649)

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

2/24/1999

Update or Other Action

Final Tier II Ecological Risk Assessment for Piscivorous Wildlife Inhabiting Eskimo Creek report (dated May 1997)

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, systems operate during warm months

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

Groundwater Monitoring Report, Groundwater Zone 1, 1997 (draft dated January 1999, final dated July 1999)

Gretchen Pikul

8/30/1999

Proposed Plan

Final Proposed Plan for Interim Remedial Action, Groundwater Zone 1

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 yet)

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

5/18/2000

Update or Other Action

Groundwater Zone 1 Interim Record of Decision - draft dated April 2000; ADEC initial management briefing meeting on 4-27-00; initial ADEC comments dated 5-3-00; comment resolution meeting on 5-18-00; draft final version dated ***, received on ***; ADEC management briefing meeting on ***; final version dated ***, received on ***; ADEC signed on ***; Air Force signed on ***.

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

Site Ranked Using the AHRM

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

Record of Decision

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

Long Term Monitoring Established

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

Final Intrinsic Remediation Report - Groundwater Zone 1 - 1998 (draft dated April 1999 and received on 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

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, ADEC comment letter on 2nd version dated November 7, 2000, final report dated December 2000, received on February 5, 2001)

Gretchen Pikul

2/5/2001

Update or Other Action

Groundwater Monitoring Report, Groundwater Zone 1, 1998 Results (draft dated April 1999, final dated December 2000, received on February 5, 2001)

Gretchen Pikul

2/5/2001

Update or Other Action

Intrinsic Remediation Report - Groundwater Zone 1 - 1998 (final dated December 2000, received 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

3/1/2001

Update or Other Action

2000 Limited Field Investigation at Eskimo Creek Treatment System Seeps report (draft dated December 21, 2000, received January 2, 2001 ADEC comment letter dated March 1, 2001)

Gretchen Pikul

4/15/2001

Update or Other Action

Eskimo Creek Seeps 1 and 2 Monthly Monitoring, Discharge Monitoring Report - January 2001 (dated March 15, 2001, received on April 5, 2001, ADEC comment letter dated April 15, 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

4/25/2001

Update or Other Action

Eskimo Creek Treatment Facility Monthly Monitoring Report - February 2001 (dated April 10, 2001)

Gretchen Pikul

5/7/2001

Update or Other Action

Eskimo Creek Treatment Facility Monthly Monitoring Report - March 2001 (dated May 2, 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

7/25/2001

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

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

1/8/2002

Update or Other Action

Management Action Plan (draft dated January 2001; ADEC comment letter dated April 3, 2001; response to comments received June 11, 2001; comment resolution meeting on August 29, 2001; final report dated October 2001 and received on January 8, 2002; not all comments documented within the response to comments as being addressed are addressed within the final report; discussions with the Air Force continue on this issue).

Gretchen Pikul

4/9/2002

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

1/28/2003

GIS Position Updated

Updated Quadrangle, Latitude, Longitude, Section, Township, and Range fields using TopoZone.com and site maps.

Former Staff

4/23/2003

Update or Other Action

Remedial System Design for Groundwater and Vadose Zone Remediation at POL Tanks SS015 draft dated March 2003 and received on March 4, 2003; ADEC comment letter dated March 20, 2003; Air Force response to comments received and ADEC approval letter dated March 20, 2003; additional comments and responses received on and updated ADEC approval letter sent on March 21, 2003; final dated April and received on April 23, 2003.

Gretchen Pikul

5/2/2003

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.

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

2/4/2004

Meeting or Teleconference Held

Meeting/teleconference on the Zone 1 pilot test biovent system status.

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

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

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

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

6/3/2004

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 and received on June 3, 2004.

Gretchen Pikul

6/8/2004

Update or Other Action

Fact Sheet for King Salmon Air Station Environmental Restoration Project; draft fact sheet received and ADEC comments sent on April 16; Air Force Comment Response received on May 25; final dated and received in June 2004.

Gretchen Pikul

7/16/2004

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.

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

8/26/2004

Update or Other Action

Bioventing Pilot Test Report – Remedial Design for Groundwater and Vadose Zone Remediation at POL Tanks SS015; draft dated May 2004 and received on June 3, 2004; final CD version only (dated July 2004) received on July 26, 2004; final report dated July 2004 and received on August 26, 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

11/15/2004

Meeting or Teleconference Held

Remedial Process Optimization (RPO) team met with Air Force, ADEC, and EPA at at contractor's office in San Antonio TX - November 8-12, 2004. The primary purpose of this meeting was to evaluate the current status of cleanup efforts at the King Salmon AS and draft the RPO report due in March 2005.

Jeff Norberg

6/16/2006

Update or Other Action

Implementation of Remedial Process Optimization (RPO) Recommendations Report; draft dated March 2005 received March 30, 2005; ADEC comment letter dated May 16, 2005; Air Force Comment Response and ADEC approval letter issued on May 20, 2005; final dated June 2006 received on June 16, 2006.

Jeff Norberg

1/26/2007

Update or Other Action

File number issued 2569.38.015.03.

Aggie Blandford

4/21/2008

Exposure Tracking Model Ranking

Initial ranking with ETM completed.

Jonathan Schick

4/14/2011

Document, Report, or Work plan Review - other

Contaminated Sites Staff recieved the Draft Work Plan for Monitoring Well Decommissioning and Repair for all sites across the King Salmon Installation.

Jonathan Schick

6/21/2011

Update or Other Action

Contaminated Sites Staff recieved responses to our comments on the Draft Work Plan for Monitoring Well Decommissioning and Repair. The responses were acceptable and the plan should be approved to be implemented in the field.

Jonathan Schick

6/23/2011

Update or Other Action

Contaminated Sites Staff recieved the Final Version of the Work Plan for Monitoring Well Decommissioning and Repair for all sites across King Salmon Air Station. The Comments from the Draft Version of the Plan were addressed in the response to comments and in the Final Version of the document.

Jonathan Schick

8/26/2011

Document, Report, or Work plan Review - other

Contaminated Sites Staff recieved the Summary Report for Monitoring Well Decommissioning and Repair for King Salmon. The monitoring wells that were worked on during this program were located in all of the groundwater zones and at many of the individual sites at the installation. The report contained a short narrative, but mostly presented the outcome of the program through before and after photographs for each well location where work was performed.

Jonathan Schick

8/29/2011

Document, Report, or Work plan Review - other

Contaminated Sites Staff submitted a letter to the AIr Force's Project Manager approving the final report for the Monitoring Well Decommissioning project. The report detailed the 2011 activites at the sites across many areas at King Salmon Air Station.

Jonathan Schick

11/17/2016

Update or Other Action

The AF is aware that a final ROD needs to be prepared for Zone 1. The closest groundwater monitoring wells to the POL tanks (SS015) included in the current groundwater monitoring program are MW-41 (~100 feet to the SE) in aquifer B and MW-6 (~200 feet to the SSE) in aquifer A. MW-41 is consistently one of the hottest wells in groundwater Zone 1 for TCE and DRO. It is unknown if this if from site SS015 or other CS sites in the vicinity.

Holly Weiss-Racine

2/15/2017

Update or Other Action

3rd 5YR received for review and comment. Issues for Zone 1 identified during this review were: Land use controls (LUCs) listed in Section 2.5 of the first Five-Year Review (USAF,2006) have not been fully implemented. The ROD for Zone 1 has not been finalized. An updated HHRA was performed for Zone 1 groundwater in 2015 to assess current conditions and evaluate updated TCE toxicity values. In 2014, the State of Alaska published revised guidance for TCE exposures for women of child-bearing age. For groundwater, this guidance recommends TCE exposure levels greater than 0.0025 micrograms per liter should not occur for this receptor group, which is lower than the RAO identified for Zone 1. However, this recommendation is specific to women of child-bearing age who are directly exposed to TCE and not just considered as potential future receptors. RAOs presented in the Zone 1 ROD utilized criteria presented from 18 AAC 75 for groundwater and 18 AAC 70 for surface water (Table 2-2). Revisions to 18 AAC 75 in 2015 and 18 AAC 70 in 2012 have not changed any of the RAOs for COCs in the B-Aquifer groundwater and surface water. For the A-Aquifer, the cleanup levels were increased by a factor of 10 because the A-Aquifer is not used as a drinking water source. The use of the factor of 10 increase is no longer promulgated by ADEC. Therefore, the RAOs for the A-Aquifer may not be protective of groundwater. However, LUCs were required as part of the remedies for sites within Zone 1. The LUCs restrict the installation of drinking water wells within the A- and B-Aquifers in Zone 1, and restricting groundwater use or contact. Therefore, the remedy remains protective of human health. For sediment, the ecological criteria presented as RAOs represent current guidance. See site file for additional information.

Louis Howard

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

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

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

6/22/2023

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

10/28/2024

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

Contaminant Information

Name

Level Description

Media

Comments

Control Type

Type

Details

Requirements

Description

Details

2021 Remedial Action/Long Term Management Report

2020 Remedial Action/Long Term Management Report

2019 Remedial Action/Long Term Management Report

2018 Remedial Action/Long Term Management Report

2017 Long-Term Management Report

2016 Remedial Action/Long Term Management Report

Site Summary

No associated sites were found.

Missing Location Data

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Alaska Department of Environmental Conservation

Site Report: King Salmon AS GWZ 1 SS015 POL Tanks

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

2021 Remedial Action/Long Term Management Report

2020 Remedial Action/Long Term Management Report

2019 Remedial Action/Long Term Management Report

2018 Remedial Action/Long Term Management Report

2017 Long-Term Management Report

2016 Remedial Action/Long Term Management Report

Site Summary

Missing Location Data

State of Alaska Department of Environmental Conservation