| Action Date |
Action |
Description |
DEC Staff |
| 7/23/1991 |
Update or Other Action |
Compliance Orders by Consent for Oil Discharge Prevention and Contingency Plan Submittals for King Salmon AFB and Shemya AFB bulk fuel facilities letter dated July 23, 1991 to 11th Air Force (Gene Gallogly, Chief of Environmental Planning Division) from ADEC (Svend Brandt-Erichsen, Regional Oil Program Coordinator). ADEC letter dated August 2, 1991 regarding the Compliance Order by Consent was issued. |
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 |
| 8/31/1993 |
Update or Other Action |
SAIC 1993: Evidence for benzene and TCE contamination of soil and A-Aquifer groundwater was reported by SAIG: a 1988 subsurface soil and groundwater investigation was reportedly conducted by the COE. The 1988 investigation detected benzene concentrations up to 1,800 micrograms per kilogram (ug/kg) in soil, and 2,000 ug/l_ in groundwater. TCE was detected at concentrations up to 1,700 ug/kg in soil and 750 ug/L in groundwater. The source of the groundwater impact was not determined.
Soil Quality: SAIC performed a soil gas survey in 1993 along a pre-established grid close to the Refueler Shop (Building 149). TCE was detected in 21 of 52 monitoring points at concentrations ranging from 120 parts per billion (ppb) to 29,000 ppb (155852.76 ug/m3). Other VOCs analyzed for and detected in a scattered distribution in 6 of the 52 monitoring points at concentrations ranging from 240 ppb to 420,000 ppb included 1,1 -DCA, 1,1,1 -TCA, MEK, and BTEX.
See site file for additional information. |
Louis Howard |
| 3/31/1994 |
Site Ranked Using the AHRM |
Initial ranking. |
Louis Howard |
| 5/3/1994 |
Site Added to Database |
DRO contamination. |
Louis Howard |
| 8/6/1995 |
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 |
| 8/9/1995 |
Update or Other Action |
RI/FS Report Vol. I - Text Final, August 1995 received. A-Aquifer Groundwater - Zone 2 is located east of Eskimo Creek. A dissolved petroleum plume is present beneath the built-up area. Petroleum contamination extends from the surface to the water table. The plume extends toward Eskimo Creek but does not appear to actually reach the creek. The primary source of the petroleum plume appears to be at or near Building 149, the Refueler Shop.
Soil: GRO/DRO soil contamination is present around the Refueler Shop. Groundwater: Almost all of the A-Aquifer wells sampled had detectable DRO. BTEX compounds, TCE and Lead.
Soil Gas:
Analytical Report America North 10/28/1993 Work Order # MKS93008 Method 8010 ppmV soil gas RI/FS Vol. III of III Book IV of IV Appendix K.1 Soil Gas results.
TCE was detected in 27 locations at 0.01 [53 ug/m3 sample SS21 (24)] to 6 ppm/v from (four foot soil gas probes) which is equivalent to 32,245.4 ug/m3 50' north of bldg. 149 (See Sample# SS21SG-36 Lab Code 009-14 analyzed on 10/31/1993 page 390 of 447 pages). NOTE: 2017 ADEC VI GUIDANCE for indoor air, shallow soil gas and deep soil gas target levels are much lower: Target Level-indoor air for residential is 2.1 ug/m3 and commercial is 8.4 ug/m3.
Shallow soil gas includes soil gas collected from 5 feet or less below the ground surface, or 5 feet or less below a foundation. Subslab soil gas includes vapor collected from directly beneath the foundation slab. the soil gas samples from this effort meet the SHALLOW SOIL GAS definition.
TCE Shallow and subslab soil gas target levels for residential are 20 ug/m3 and commercial at 84 ug/m3. Deep soil gas target levels for residential are 200 ug/m3 and 840 ug/m3.
Carbon tetrachloride results of 0.4 ppmV is equivalent to 2,516.81 ug/m3 50' NE of Bldg. 131 at SS21 SG-79 page 403 of 447 pages which is higher than the target levels for shallow or subslab gas (Res. 47 ug/m3 Comm. 200 ug/m3).
See site file for additional information. |
Louis Howard |
| 10/28/1997 |
Update or Other Action |
UST Approach for Remediation and Closure. |
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 |
| 5/12/1998 |
Update or Other Action |
Final King Salmon USTs - Summary of UST Site Historical Information dated April 20, 1998. |
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 |
| 6/15/1999 |
Update or Other Action |
Bioventing systems operational, systems operate during warm months. |
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 |
| 5/1/2002 |
CERCLA Proposed Plan |
Proposed Plan for Final Remedial Actions at the Base Industrial Area (Zone 2) ; draft received January 24, 2002; comment resolution meeting on February 21, 2002; draft final received March 13, 2002; public meeting on April 3 with Naknek Village Council and April 16, 2002 with RAB; public comment period April 1 to May 1, 2002.
Final remedy proposed for SS021: proposed transfer to UST Compliance Program. Final remedy proposal includes: continuation of bioventing currently underway for five years, MNA of contaminated soil within site area that do not have bioventing systems, ICs to prevent human contact with contaminated soil (e.g. ICs will restrict excavations and other subsurface activities at the site), annual LTM GW monitoring with a five year review, soil sampling to confirm cleanup levels have been achieved.
See site file for additional information. |
Gretchen Pikul |
| 12/17/2003 |
CERCLA ROD Approved |
The Record of Decision for Final Remedial Action at Groundwater Zone OT028 (Zone 2), Waste Accumulation Area 3 (SS017), Eskimo Creek Dump (SS022), Refueler Shop (SS021), and Old Power Plant Building (SS020) was signed by ADEC on December 18, 2002.
The selected final remedies include: monitored natural attenuation of the TCE, BTEX, and GRO plumes with annual sampling, institutional controls on drinking water wells, and a 5-year review for OT028; transfer to UST Compliance Section for continued operation of bioventing systems since contamination is associated with former state-regulated USTs, annual LTM, institutional controls of excavations and other subsurface activities, 5-year review, and confirmation soil samples to obtain site closure for SS021 and SS020.
The 18 AAC 75.350 determination has been granted for the A-Aquifer, with application of the 10x rule for soil and groundwater. This approval has been given for similar facility sites (Zones 1 and 4) in recent years and documented in final, signed RODs. Air Force ROD review and signature took another year; an addendum was drafted and signed by ADEC on December 17, 2003 and by Air Force on December 12, 2003. The addendum is attached to the front cover of the ROD.
See site file for additional information. |
Gretchen Pikul |
| 12/17/2003 |
Site Closure Approved |
The Record of Decision for Final Remedial Action at Groundwater Zone OT028 (Zone 2), Waste Accumulation Area 3 (SS017), Eskimo Creek Dump (SS022), Refueler Shop (SS021), and Old Power Plant Building (SS020) was signed by ADEC on December 18, 2002.
The selected final remedies include: monitored natural attenuation of the TCE, BTEX, and GRO plumes with annual sampling, institutional controls on drinking water wells, and a 5-year review for OT028 and transfer to UST compliance section for continued operation of bioventing systems since contamination is associated with former state-regulated USTs, annual LTM, institutional controls of excavations and other subsurface activities, 5-year review, and confirmation soil samples to obtain site closure for SS021 and SS020.
Institutional controls, which are recorded land use restrictions, are a required component of the selected remedies. Drinking water wells will not be installed in the A-Aquifer in Zone 2 (07028) or Eskimo Creek Dump (SS022). Excavations other subsurface activities will be restricted from sites SS02O (Old Power Plant Building), SS021 (Refueler Shop) bldg. 149, and SS022 (Eskimo Creek Dump). The institutional controls will be documented in the base master plan and state land records.
The 18 AAC 75.350 determination has been granted for the A-Aquifer, with application of the 10x rule for soil and groundwater. This approval has been given for similar facility sites (Zones 1 and 4) in recent years and documented in final, signed RODs. Air Force ROD review and signature took another year; an addendum was drafted and signed by ADEC on December 17, 2003 and by Air Force on December 12, 2003. The addendum is attached to the front cover of the ROD. |
Gretchen Pikul |
| 12/17/2003 |
Institutional Control Record Established |
Institutional Controls established and entered into the database. (Entered as a data correction on March 24, 2017.)
1. Any future change in land use may impact the exposure assumptions cited in this document. If land use and/or ownership changes, these management conditions may not be protective and ADEC may require additional remediation and revised conditions. Annual monitoring of ICs will continue; protectiveness determinations and remedy evaluation will be included as part of the five year review. Five year review reports shall be submitted to ADEC.
2. Any proposal to transport soil or groundwater off-site requires ADEC approval in accordance with 18 AAC 75.325 (as amended March 23, 2017). A “site” is defined by 18 AAC 75.990 (115).
3. Movement or use of contaminated material in a manner that results in a violation of 18 AAC 70 water quality standards is prohibited.
The ADEC Contaminated Sites Database will be updated to reflect the change in site status as detailed above, required ICs, and will include a description of the contamination remaining at the site. Institutional controls will be removed in the future if documentation can be provided that shows cleanup levels have been met. Management conditions 2-4 remain in effect after ICs are removed.
This determination is in accordance with 18 AAC 75.380 (as amended March 23, 2017) and does not preclude ADEC from requiring additional assessment and/or cleanup action if future information indicates that this site may pose an unacceptable risk to human health or the environment.
See site file for additional information. |
Evonne Reese |
| 9/23/2004 |
Site Ranked Using the AHRM |
Changed Toxicity from 4 to 2 to reflect DRO. |
Gretchen Pikul |
| 9/23/2004 |
Site Number Identifier Changed |
Changed Workplan from X9 to X1 to reflect DRO as primary Contaminant of Concern. |
Former Staff |
| 1/26/2007 |
Update or Other Action |
File number issued 2569.38.016.05. File number references information pre-December 2002. For information post-December 2002, see 2569.38.022.05 in the LUST database. |
Aggie Blandford |
| 10/17/2016 |
Document, Report, or Work plan Review - other |
ADEC provided comments on the "Closure Report for Nine Compliance Restoration Program Sites (TU/US-C519, TU/US-C517, TU/US-C518, TU/US-C520, TU/US-C522, TU/US-C523, TU/US-C524, TU/US-C589, TU/US-C592) at the King Salmon Divert". Site TU/US-C523 is included in the CS database as two individual sites, an active LUST site (Haz ID: 23354 “King Salmon Air Station SS21 Refueler Shop”) and a closed (Cleanup Complete) CSP site (Haz ID: 506 “King Salmon Air Station SS21”). Based on our research, this site is closed with Institutional Controls (ICs) (bioventing, land use controls, annual inspections, 5-year review) and was inaccurately closed without ICs in the database. Once this report is finalized, ADEC will close (Cleanup Complete) the LUST site and update the CSP site to closed (Cleanup Complete with ICs). IC documentation will be tracked in the CS database CSP site Haz ID: 2629 “King Salmon AS OT028 GW Zone 2”.
Site TU/US-C522 is included in the CS database as two individual sites, an active leaking underground storage tank (LUST) site (Haz ID: 23248 “King Salmon AS – Bldg #160 Combat Alert Cell”) and an active contaminated sites program (CSP) site (Haz ID: 1581 “King Salmon Combat Alert Cell”). Based on the closure of the tank and the investigation documenting no additional soil contamination above cleanup levels associated with the tank, ADEC plans to close these two contaminated sites (Cleanup Complete) after this report is finalized. There is remaining TCE/PCE contamination at the site, but this is not the result of a release at the tank and is being managed under the Zone 2 groundwater monitoring program. |
Holly Weiss-Racine |
| 3/22/2017 |
Document, Report, or Work plan Review - other |
Staff provided comments on the revised closure report for Nine Compliance Restoration Program Sites TU/US-C519, TU/US-C517, TU/US-C518, TU/USC520, TU/US-C522, TU/US-C523, TU/US-C524, TU/US-C589, and TU/US-C592 at King Salmon Divert.
ADEC agrees with the closure for the following sites:
Cleanup Complete
1) TU/US-C523 UST 122: King Salmon Air Station Refueler Shop (LUST) a 1,000 gallon used oil UST Hazard ID: 23354, 2) TU/US-C517 UST 300-2: a 1,000 gallon diesel fuel UST, 3) TU/US-C519 UST 300-1: a 1,000 gallon waste oil UST, 4) TU/US-C518 UST 614: a 2,000 gallon diesel fuel UST, 5) TU/US-520 UST 638 a 10,000 gallon diesel fuel UST, 6) TU/US-C589 UST 52: a 10,000 gallon heating fuel UST, 7) TU/US-C592 UST 560a: a 500 gallon heating fuel UST, 8) TU/US-C524 UST 152: a 10,000 gallon non-regulated UST, 9) TU/US-C522 UST 104: a 10,000 gallon diesel Underground Storage Tank (UST), King Salmon AS Bldg. #160 Combat Alert Cell Hazard ID: 23248 and King Salmon AS Combat Alert Cell Hazard ID: 1581.
Cleanup Complete with Institutional Controls (ICs)
Site: TU/US-C523 aka King Salmon Air Station SS21, Hazard ID 506 will be changed from “Cleanup Complete” to “Cleanup Complete with Institutional Controls” to better reflect current site conditions, required land use controls, annual inspections/monitoring and 5-year review requirements. Institutional controls (documented in the base master plan and state land records) will minimize human contact with contaminated soil (e.g., institutional controls will restrict excavations and other subsurface activities at the site) and restrict installation of any drinking water wells or use of the groundwater for any purpose.
Additional Action Required
Site TU/US-C519: ADEC concurs that this site requires additional action as mentioned in the document. A November 2016 Closure Report for UST 300-1 was received by ADEC. The report showed that there were exceedances of soil cleanup levels (18 AAC 75 November 6, 2016) for the following contaminants: DRO at 5,210 mg/kg (250 mg/kg), 1-Methylnaphthalene at 6.33 mg/kg (0.41 mg/kg), 2-Methylnaphthalene at 8.43 mg/kg (1.3 mg/kg) and naphthalene at 2.99 mg/kg (0.038 mg/kg) [16ANK-EX05-ESW(3)].
See site file for additional information. |
Louis Howard |
| 3/22/2017 |
Cleanup Complete Determination Issued |
Site: TU/US-C523 aka King Salmon Air Station SS21, Hazard ID 506 will be changed from “Cleanup Complete” to “Cleanup Complete with Institutional Controls” to better reflect current site conditions, required land use controls, annual inspections/monitoring and 5-year review requirements. Institutional controls (documented in the base master plan and state land records) will minimize human contact with contaminated soil (e.g., institutional controls will restrict excavations and other subsurface activities at the site) and restrict installation of any drinking water wells or use of the groundwater for any purpose. |
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 |
| 5/18/2023 |
Site Visit |
DEC conducted a site visit with the U.S. Air Force. |
Ginna Quesada |
