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Site Report: King Salmon AS GWZ 5 LF007 Landfill No. 3

Site Name: King Salmon AS GWZ 5 LF007 Landfill No. 3
Address: LF07 Landfill No.3, Groundwater Zone 5 (OT31), King Salmon, AK 99613
File Number: 2569.38.019.11
Hazard ID: 2838
Status: Cleanup Complete
Staff: No Longer Assigned, 9074655229 dec.icunit@alaska.gov
Latitude: 58.672251
Longitude: -156.607582
Horizontal Datum:WGS84

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

Problems/Comments

Groundwater Zone 5 (OT31). Landfill Number 3 was former base landfill from 1969 to 1976. Material disposed included shop waste, construction debris, and drums of unknown contents. The landfill is situated within bluffs with a stream running through the site.

Action Information

Action Date Action Description DEC Staff
9/15/1985 Preliminary Assessment Approved Phase I - Records Search and Site Prioritization. Former Staff
6/15/1986 Update or Other Action Phase II - Task I Pre-Survey Report, Shemya Air Force Base and King Salmon Air Force Base Former Staff
3/15/1992 Update or Other Action Report of Groundwater Monitoring Well Sampling and Analysis (dated July 31, 1992) Louis Howard
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
12/15/1993 Update or Other Action Analytical Results: Private Water Wells (dated March 1, 1994). Louis Howard
5/15/1994 Update or Other Action 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
8/29/1995 Update or Other Action Limited Field Investigation (dated June 1995). In the fall of 1993, the LFI was performed in conjunction with the ongoing RI/FS - the purpose of the LFI was to identify and evaluate 9 lower priority sites to assess possible environmental impacts. Louis Howard
8/29/1995 Update or Other Action Report, Installation Restoration Program, Remedial Investigation / Feasibility Study at 14 sites, Stage 3 Remedial Investigation studies conducted between October 1993 and December 1994 (final dated August 1995). Based on the results of the RI/FS and remedial actions completed prior to publication of the final RI/FS - the 2 Dry Wells, WACs, WAA#2, Road Oiling, and Landfill Number 2 sites did not require further investigation. Louis Howard
6/15/1996 Update or Other Action Final Installation-wide Environmental Baseline Survey. Louis Howard
6/15/1996 Site Characterization Workplan Approved Remedial Investigation / Feasibility Study Workplan for Eskimo Creek Dump (SS022) and Landfill Number 3 (LF007) Sites (draft dated March 1996, final dated June 1996). Louis Howard
6/15/1996 Update or Other Action Final Human Food Chain, Aquatic Biota, and Wetlands Evaluation workplan Louis Howard
10/15/1996 Update or Other Action Final Field Report for Spring 1996, Human Food Chain, Aquatic Biota, and Wetlands Evaluation Louis Howard
11/15/1996 Update or Other Action Aerial Photographic Analysis, King Salmon Airport Study Area. Prepared by EPA Region 10, Research and Development, Characterization, Research Division, TS-PIC-9710003S, dated November 1996. Gretchen Pikul
12/6/1996 Update or Other Action Community Relations Plan for King Salmon Airport and Naknek Recreation Camps 1 and 2 (draft dated December 1996, final dated May 1997) Gretchen Pikul
1/15/1997 Update or Other Action Preliminary Report, Human Food Chain, Aquatic Biota, and Wetlands Evaluation Gretchen Pikul
2/12/1997 Update or Other Action (Old R:Base Action Code = SI - Site Investigation). SI action added 02/12/1997 by Shannon and Wilson, Inc., based on Air Force Relative Risk Evaluation Worksheet dated 9/9/95. No other information available. S&W-Miner
2/12/1997 Site Added to Database Site added by Shannon and Wilson, Inc. S&W-Miner
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 Site Characterization Report Approved Eskimo Creek Dump and Landfill Number 3, Installation Restoration Program Remedial Investigation Report (draft dated September 1996, final dated July 1997). Gretchen Pikul
8/12/1997 Update or Other Action King Salmon Residential Well Sampling Report May 1997 Sampling Event (dated July 1997, received August 1997) Gretchen Pikul
3/25/1998 Update or Other Action King Salmon Residential Well Sampling Report November 1997 Sampling Event (dated and received March 1998) Gretchen Pikul
4/27/1998 Update or Other Action King Salmon, Naknek and South Naknek Native Villages Site Assessment Report (draft dated March 1998, received April 1998, no final received) Gretchen Pikul
9/4/1998 Update or Other Action King Salmon Residential Well Sampling, August 1997 Sampling Event, Analytical Results and Data Evaluation (dated March 1998, received September 1998) Gretchen Pikul
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
3/30/1999 Meeting or Teleconference Held Seattle meeting with trustees on fish study previous results and follow-on workplan Gretchen Pikul
10/13/1999 Site Ranked Using the AHRM Initial ranking. Gretchen Pikul
3/16/2000 Update or Other Action King Salmon Airport Restoration Advisory Board Orientation Manual (final dated April 1999 and received March 16, 2000). Gretchen Pikul
8/18/2000 Update or Other Action 2000 Limited Field Investigation for Landfill Number 3 (Site LF07) and Remedial Investigation / Feasibility Study for Circle Landfill Workplan (draft dated May 31, 2000; ADEC comment letter dated June 12, 2000; final dated August 9, 2000). LF06 northern portion (aka Circle Landfill) discovered after the LF06 southern portion investigated and ROD signed. Risk Assessment included within workplan; ADEC comment letter dated July 7, 2000; comment resolution meeting on August 3, 2000; meeting minutes received December 12, 2000, final workplan received August 9, 2000. Gretchen Pikul
8/21/2000 Update or Other Action General Plan, 611th Air Support Group, Remote Alaska Sites, Volumes 1, 2, and 3 CD version only (dated March 2000 and received August 21). Portion of Bluffs IC established. Gretchen Pikul
4/18/2001 Update or Other Action 2000 Limited Field Investigation at Landfill Number 3 (Site LF07) report (draft dated November 21, 2000 and received December 5, 2000; ADEC comment letter dated December 12, 2000; final dated April 18, 2001). Gretchen Pikul
4/25/2001 Meeting or Teleconference Held Meeting with Air Force, ADEC, and EPA at EPA Seattle office - April 23-25, 2001. Gretchen Pikul
9/26/2001 Update or Other Action Restoration Advisory Board Pocket Guide and Community Outreach Handbook (ADEC comment letter dated May 30, 2001; final dated September 2001). Gretchen Pikul
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
1/28/2003 GIS Position Updated Updated Quadrangle, Latitude, Longitude, Section, Township, and Range fields using TopoZone.com and site maps. Former Staff
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
3/25/2004 Proposed Plan Proposed Plan for Final Remedial Actions at Landfills and Fire Training Areas in Groundwater Zone 5; ADEC received electronic version via e-mail on November 12, 2003; general direction meeting on November 13; ADEC management briefing meeting on November 21; comment resolution meetings on November 24 and 25; draft final received December 12, 2003; PACAF and Air Staff comments received January 9, 2004; comment resolution meeting/teleconfernce with PACAF and Air Staff on January 22, 2004; comment resolution meeting with project managers on February 4, 2004; 2nd comment resolution teleconference / meeting with PACAF and Air Staff on March 11; ADEC received final Proposed Plan on March 25 and posted on ADEC webpage on March 30; Public comment period from March 27 to May 7, and public meeting on April 27. Gretchen Pikul
6/8/2004 Update or Other Action Fact Sheet for King Salmon Air Station Environmental Restoration Project; draft fact sheet received and ADEC comments sent on April 16; Air Force Comment Response received on May 25; final dated and received in June 2004. Gretchen Pikul
7/20/2004 Update or Other Action Implementation of Remedial Process Optimization (RPO) Recommendations Work Plan; draft dated and received in June 2004; ADEC comment letter dated June 28, 2004; Comment Response on July 9; comment resolution meeting on July 19; final received on July 20 (some errors are present – see Comment Response in work plan jacket for details). Gretchen Pikul
10/7/2004 Update or Other Action Record of Decision for Zone 5; preliminary meeting held on August 24, 2004; draft ROD received October 7 via e-mail. 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
1/24/2008 Update or Other Action File number given: 2569.38.019.11 Nicole Hurt
1/29/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Jonathan Schick
4/15/2008 Site Visit ADEC staff conducted a site visit to a large number of pertinent sites at King Salmon Air Station over a 3 day visit. Sites were inspected for any visible evidence of contamination and potential sampling locations. ADEC staff was accompanied to all of the sites by the Project managers from the USAF and thier contractors. A RAB meeting was held during the site visit. Jonathan Schick
4/15/2008 Update or Other Action ADEC staff participated in a Restoration Advisory Board meeting at the King Salmon Air Station. Community members are encouraged to attend and view a presentation of the most recent sampling program where data is available. Main topics discussed were the TCE plume that is in Groundwater Zone 1 where a treatibility study is being conducted to see the possible influence of adding an enhanced in-situ bioremediation product that is engineered to break down chlorinated solvents. The other main topic discussed was the results from the basewide monitoring event at all of the Groundwater Zones from 2007. Jonathan Schick
10/21/2008 Site Visit ADEC staff took part in a site visit to a number of pertinent sites at King Salmon Air Station over a 2 day visit. Sites, especially the pending Multi Site Inspection sites, were inspected for any visible evidence of contamination and potential sampling locations as the work plans are still being formulated. ADEC staff was accompanied to all of the sites by the Project managers from the USAF and thier contractors. A Restoration Advisory Board meeting was held during the site visit. The topics discussed included the most recent basewide monitoring program, a discussion of the Multi-SIte inspection project, an update on the status of the Groundwater Zone 5 Records of Decision, and a brief discussion concerning the TCE treatibility Study in Groundwater Zone 1. The next RAB meeting has been tentatively scheduled for April 21, 2009. Jonathan Schick
4/21/2009 Update or Other Action ADEC staff conducted a site visit to pertinent sites at King Salmon Air Station over a 2 day visit. Sites were inspected for any visible evidence of contamination and to become more familiar with the layout and topography of the area. ADEC staff was accompanied to all of the sites by the Project manager from the USAF and thier contractors. A Restoration Advisory Board meeting was held during the site visit. The topics discussed included the most recent basewide monitoring program, a discussion of the Multi-Site inspection project which is entering Phase II this summer, an update on the status of the Groundwater Zone 5 Records of Decision, and a brief discussion concerning the TCE treatibility Study in Groundwater Zone 1. The next RAB meeting has been tentatively scheduled for October, 2009. Jonathan Schick
10/26/2009 Site Visit ADEC staff traveled to King Salmon with the new RPM for the King Salmon Air Station to tour the sites and look at the excavations that were completed during the 2009 field season. Several sites were inspected and overall the sites appeared to be secured with orange snow fencing and visqueen covering the stockpiles to prevent ponding and migration of contaminants. While in King Salmon staff attended and participated in a Restoration Advisory Board Meeting to meet with the public of King Salmon and discuss the results from the latest round of base-wide sampling and to discuss the progress of the excavations that were conducted during the summer. Jonathan Schick
10/20/2010 Update or Other Action ADEC staff conducted a site visit to pertinent sites at King Salmon Air Station over a 2 day visit. Sites were inspected for any visible evidence of contamination and to observe some of the work that is being conducted to remove POL impacted soils and PCB impacted soils at OT010. ADEC staff was accompanied to all of the sites by the Project manager from the USAF and thier contractors. A Restoration Advisory Board meeting was held during the site visit. The topics discussed included the most recent basewide monitoring program, remedial action cleanup programs, and management of the IDW and soil in the biocells set up to add oxygen to the soil matrix to aid the degradation of the petroleum hydrocarbons. The next RAB meeting is scheduled for April 2011. Jonathan Schick
4/14/2011 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 Document, Report, or Work plan Review - other Contaminated Sites Staff submitted a letter to the AIr Force's Remedial Project Manager for King Salmon approving the Work Plan for Monitoring Well Decommissioning and Repair across the King Salmon Installation. The work is scheduled to be conducted in July of 2011. Jonathan Schick
6/23/2011 Update or Other Action Contaminated Sites Staff recieved the Final 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
12/15/2016 Update or Other Action The AF is currently preparing a ROD for Zone 5. The draft document is presently in USAF legal review and should be provided to ADEC in the near future. Holly Weiss-Racine
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
7/17/2019 Update or Other Action Site location was updated on this date. Coordinates for this site are used to determine the presence and position of the site on BLM’s ANCSA Conveyed Land web map. Rebekah Reams
3/26/2021 Document, Report, or Work plan Review - other ADEC approved the Final Groundwater Zone 5 - Circle Landfill (LF006) and Landfill No.3 (LF007) Expanded Remedial Investigation Work Plan, King Salmon Divert, Alaska, dated March 2021, in a letter on this date. The objectives of the work plan are to gather information to better understand the remaining nature and extent of contamination at the landfills and determine whether further remedial action is necessary to protect human health and the environment. LF006 and LF007 are located on land owned by Paug-Vik Inc., and were used from the early 1950s through 1960s and from 1969 through 1976, respectively. The landfills were used to dispose of general refuse, scrap metal, buliding materials, drums, and some quantities of shop waste including paints. Sammi Castle
6/30/2022 Risk Assessment Workplan Approved The ADEC approved the King Salmon Divert (Groundwater Zones 1, 2, and 5) and Naknek II Screening-Level Ecological Risk Assessment Work Plan, Final (dated June 2022). The work plan describes the approach to conduct a phased Screening-Level Ecological Risk Assessment across various sites within Naknek II and Groundwater Zones 1, 2, and 5 areas located in King Salmon, Alaska. The objectives of this work plan are to quantitatively and/or qualitatively evaluate baseline or existing exposure and risks to ecological receptors from chemicals released into the environment during site operations. The work plan aims to address a total of seventeen sites for contaminants such as metals, petroleum hydrocarbons, volatile organic compounds, semivolatile organic compounds, polychlorinated biphenyls, per- and polyfluoroalkyl substances, pesticides, dioxins and furans. Ginna Quesada
11/7/2022 Compliance Advisory Letter ADEC issued compliance advisory letters to the USACE, USAF, and Jacobs to address violations of 18 AAC 75.325(i) and 18 AAC 75.370(b) by failing to obtain transport approval for investigation derived waste. Ginna Quesada
3/3/2023 Document, Report, or Work plan Review - other DEC reviewed and provided comments regarding the Groundwater Zone 5 Expanded Remedial Investigation Report and Human Health and Ecological Risk Assessment for Sites FT003, LF006, LF007, DA037, Preliminary Draft, dated January 2023.The report describes the expanded remedial investigation activities and risk assessment conducted during the 2021 field season for the Former Fire Training Area 3 (FT003), Circle Landfill (LF006), Landfill No. 3 (LF007), and Debris Drums (DA037) sites located in groundwater zone 5 in King Salmon, Alaska. The goal of the report was to resolve existing data gaps from previous investigations and define the nature, extent, and risk associated with existing contamination at the sites. The 2021 field work included soil, groundwater, surface water, and sediment sampling, geophysical investigations, and test pitting. The report recommended to proceed with a Phase I RI for per- and polyfluoroalkyl substances (PFAS) at LF006, risk management for cadmium, aroclor 1254, and aroclor 1260 at DA037, and no further action for FT003, and LF007. Multiple locations remain with lead concentrations exceeding DEC’s human health cleanup levels at DA037. Ginna Quesada
5/18/2023 Site Visit DEC conducted a site visit with the U.S. Air Force. Ginna Quesada
2/8/2024 CERCLA Proposed Plan DEC reviewed and provided comments regarding the No Action Proposed Plan for Groundwater Zone 5 Sites FT003 and LF007 King Salmon Divert, Alaska. The proposed plan proposes the preferred alternative of no action at the Landfill No. 3 (LF007) and at the Former Fire Training Area 3 (FT003) sites located in groundwater zone 5 in King Salmon, Alaska. The document proposes no further work under CERCLA and state law to address remaining contamination at LF007 and FT003. Ginna Quesada
4/15/2024 CERCLA Proposed Plan DEC approved the No Action Proposed Plan for Groundwater Zone 5 Sites FT003 and LF007 King Salmon Divert, Alaska. The proposed plan proposes the preferred alternative of no action at the Landfill No. 3 (LF007) and at the Former Fire Training Area 3 (FT003) sites located in groundwater zone 5 in King Salmon, Alaska. The document proposes no further work under CERCLA and state law to address remaining contamination at LF007 and FT003. Ginna Quesada
7/17/2024 Document, Report, or Work plan Review - other DEC provided comments regarding the CERCLA No Action Record of Decision Sites FT003 and LF007 Draft, dated June 2024. The report presents the No Action Record of Decision (ROD) at the Landfill No. 3 (LF007) and at the Former Fire Training Area 3 (FT003) sites located in groundwater zone 5 in King Salmon, Alaska. The document summarizes the site investigation activities at the sites and proposes no further work under CERCLA and state law to address the remaining contamination at LF007 and FT003. Ginna Quesada
7/26/2024 CERCLA ROD Approved DEC approved the CERCLA No Action Record of Decision Sites FT003 and LF007 Final, dated July 2024. The report presents the No Action Record of Decision (ROD) at the Landfill No. 3 (LF007) and at the Former Fire Training Area 3 (FT003) sites located in groundwater zone 5 in King Salmon, Alaska. The document summarizes the site investigation activities at the sites and proposes no further work under CERCLA and state law to address the remaining contamination at LF007 and FT003. Ginna Quesada
9/12/2024 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 73814 Landfill . Ginna Quesada
11/5/2024 Exposure Tracking Model Ranking A new updated ranking with ETM has been completed for source area 73814 Landfill . Ginna Quesada
11/6/2024 Cleanup Complete Determination Issued DEC issued a Cleanup Complete Determination to the Air Force for the King Salmon AS GWZ 5 LF007 Landfill No. 3 site. The site was formerly used as a landfill by the U.S. Air Force from 1969 to 1976. The waste causing the contamination at the site included general refuse, scrap metal, scrap equipment, and some quantities of shop waste, including paints. The contaminants of concern identified in soil at this site were diesel range organics, residual range organics (RRO), lead, mercury, 1,2,4 trimethylbenzene, ethylbenzene, napthalene, 1,4-dichlorobenzene, benzo(a)anthracene. After review of the site characterization data, DEC determined the migration to groundwater contamination to be de-minimis. RRO and lead were the only contaminants that exceeded DEC’s Method Two human health cleanup levels in the soil. Table B1/B2 Human Health Soil Cleanup Levels. The singular RRO exceedance was bound vertically and horizontally by detections of RRO that were below DEC’s most stringent cleanup levels and was determined to be representative of a soil stain or area of de-minimis contamination. Per 18 AAC 75.380(c)(1), a 95% upper confidence limit was calculated for lead and results indicated that subsurface soil residual lead contamination is below the DEC’s Method Two human health cleanup levels and remaining concentrations of lead are considered de minimis. Ginna Quesada

Contaminant Information

Name Level Description Media Comments
1,2,4-Trimethylbenzene Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil Not detected in groundwater.
1,4-Dichlorobenzene Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil Not detected in groundwater.
Benzo(a)anthracene Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil Not detected in groundwater.
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil Not detected in groundwater.
Ethylbenzene Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil Not detected in groundwater.
Lead - Total < Method 2 Most Stringent Soil Per 18 AAC 75.380(c)(1), a 95% upper confidence limit (UCL) was calculated using laboratory analytical soil sample results from 1992 and 2021 (See enclosed ProUCL Calculations). The 95% UCL indicated that subsurface soil residual lead contamination is 164.1 mg/kg which is below the DEC Method Two Cleanup Level for Ingestion and remaining concentrations of lead are considered de minimis and below human health cleanup levels.
Mercury - Total Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil Not detected in groundwater.
Naphthalene Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil Not detected in groundwater.
RRO > Human Health/Ingestion/Inhalation Soil There was a single residual range organics (RRO) exceedance of DEC’s Method Two under 40-inch zone ingestion cleanup level. The exceedance was bound vertically and horizontally by detections of RRO that were below DEC’s most stringent cleanup levels. The singular RRO exceedance was determined to be representative of a soil stain or area of de-minimis contamination.

Control Type

Type Details
No ICs Required

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site.
Movement or use of contaminated material (including on site) in a manner that results in a violation of the water quality standards is prohibited (18 AAC 70)

No associated sites were found.

Missing Location Data

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State of Alaska Department of Environmental Conservation

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