| Action Date |
Action |
Description |
DEC Staff |
| 4/1/1989 |
Update or Other Action |
Air Force completed a site investigation at Cold Bay; report titled "Installation Restoration Program Phase II - Contamination/Quantification" dated April 1989. It addressed Campion, Fort Yukon, Galena, Indian Mt., Murphy Dome, Cold Bay and Sparrevohn. Report identified a former landfill and a fuel spill. Monitoring wells were installed around the landfill, no contamination was found and report recommended no further action. Some soil contamination was found at the spill site (at WACS) but report recommended no further action. |
John Halverson |
| 6/15/1993 |
Preliminary Assessment Approved |
The Corps of Engineers documented diesel fuel releases and the need for further investigation. |
John Halverson |
| 10/15/1994 |
Site Characterization Workplan Approved |
Air Force submitted the "Final Workplan - Site Investigation Cold Bay LRRS" dated August 1994, by Woodward Clyde. It included the POL tank farm (ST05) in Cold Bay proper. It also included the White Alice Site (identified as OT1), a road oiling site (identified as OT03), which falls within the WACS, and a landfill/gravel pit (identified as LF02) between the WACS and town. |
John Halverson |
| 11/15/1994 |
Update or Other Action |
Air Force, through the Corps of Engineers, contracted with Anderson, Alaska to remove the ASTs and fuel lines. Removal was completed during the fall. |
John Halverson |
| 6/15/1995 |
Update or Other Action |
(Old R:Base Action Code = RI - Remedial Investigation). The Air Force consultant Woodward-Clyde drilled soil borings and installed monitoring wells at the site in 1995. Soil and groundwater contamination was found. |
John Halverson |
| 10/30/1996 |
Update or Other Action |
Air Force submitted the "Final Report Remedial Investigation Cold Bay WACS, Alaska", dated August 1996, by Woodward Clyde. The report documents DRO contamination in soil and groundwater beneath the former tank farm. |
John Halverson |
| 2/10/1997 |
Site Added to Database |
Site added by Shannon and Wilson, Inc. |
S&W-Miner |
| 6/15/1997 |
Update or Other Action |
(Old R:Base Action Code = RA - Remedial Action). The Air Force installed a bioventing system at the site. |
John Halverson |
| 9/15/1997 |
Update or Other Action |
Air Force installed a shallow bioventing system using horizontal lines placed in trenches approximately 8' below ground surface. Contracted to have the system run through mid 1999. Work described as a "pilot study" to determine whether bioventing is a feasible remedy. |
John Halverson |
| 12/9/1998 |
Update or Other Action |
Air Force submitted a summary report on the bioventing pilot study. The results are inconclusive and not sufficient to document that bioventing is an effective remedy. Discussed alternatives with the Air Force, agreed to evaluate other alternatives and complete a proposed plan followed by a record of decision to formalize cleanup levels and plans. |
John Halverson |
| 10/14/1999 |
Site Ranked Using the AHRM |
Ranked site using current data; high priority. |
John Halverson |
| 9/25/2000 |
Interim Removal Action Approved |
Workplan approved for excavation about 2000 yards of DRO contaminated soil to be stockpiled on-site pending treatment decision. |
John Halverson |
| 11/27/2000 |
Interim Removal Action Approved |
Final Remedial Action report received. Two stockpiles left on site (750 cubic yards and 1264 cubic yards), for thermal treatment next season. DRO left in excavation up to 12000 mg/kg on the east wall,1100 mg/kg on south wall and 6200 mg/kg on the bottom. |
Debra Caillouet |
| 2/6/2001 |
Record of Decision |
Based on the current conditions at the POL Storage Area (ST05) site, excavation and thermal treatment of contaminated soil up to 15 feet deep, treatment of the approximately 2000 cubic yards of stockpiled contaminated soil, and monitored natural attenuation for the remaining contaminated soil and groundwater is the selected remedy. Institutional controls (ICs) in the form of notice in land records will be developed by USAF, with Alaska Department of Environmental Conservation (ADEC) concurrence, to document that groundwater should not be used as a drinking water source until it meets the applicable cleanup levels. The ICs will also document that if contaminated soil is excavated or exposed in the future it must be managed in accordance with the laws and regulation applicable at that time.The remedial action goals for this site are:
? For soil from the surface to 10 feet below ground surface (bgs) - removal and treatment of soil containing more than 250 milligrams per kilogram (mg/Kg) DRO to meet 18 AAC 75.341, Method 2 migration to groundwater cleanup level for the under 40 inch precipitation zone.
? For soil between 10 and 15 feet bgs – removal and treatment of soil containing more than 1,000 mg/Kg DRO to insure that the inhalation and ingestion standards are met and to reduce the amount of time it will take for natural attenuation to meet the cleanup levels
? For fuel contaminated groundwater –monitored natural attenuation to achieve no than 1.5 milligrams per liter (mg/L) DRO throughout the aquifer (18 AAC 75.345 Table C) and achieve surface water quality standards (10 ug/l TAH, 15 ug/l TAqH) at the point where groundwater discharges to surface water. |
Debra Caillouet |
| 5/17/2001 |
Meeting or Teleconference Held |
A public meeting was held May 10 in Cold Bay to present the decision document and explain the work for the upcoming field season. The Air Force and ADEC participated. |
Debra Caillouet |
| 7/3/2001 |
Update or Other Action |
Comments were prepared on the work plan to treat the 2000 yards that were stockpiled from last seasons excavation. The plan was to move the soil on the deck of a barge to Dutch Harbor for incorporation into asphalt. The plan had many deficiencies. The transportation as proposed could result in significant loss of soil. Insufficient detail on the asphalt work was received. |
Debra Caillouet |
| 7/10/2001 |
Update or Other Action |
ADEC reviewed and rejected a work plan for the clean up agreed to in the decision documents. The work plan was missing many critical components, including the operating plan for rotary kiln, several permits/reviews were not done, and the plans in general were extremely vague. |
Debra Caillouet |
| 10/23/2001 |
Meeting or Teleconference Held |
ADEC held a meeting with the Air Force and its contractor regarding the uncovered stockpile at the site. |
Debra Caillouet |
| 11/20/2001 |
Cleanup Plan Approved |
ADEC approved the operation plan for a rotary kiln to treat the 2000 yards of soil that is contracted to AHTNA |
Debra Caillouet |
| 1/10/2002 |
Update or Other Action |
ADEC received a trip report from AFCEE stating The team then traveled to ST05. Mr. Templeton briefed the team on the site configuration, and work to be performed. Of particular interest was the soil stockpile that contained excavated soils from OT01 and had been the source of recent compliance violations on the part of the Air Force contractor. All noted immediately that the center pile of the three that existed at the site was much more shoddily constructed than the other two. The berms appeared undersized and the pile was of a relatively flat and non-uniform construction. There was no netting atop the pile and only assorted tires, sandbags, and pallets held the cover in place. There was substantial standing water (ice) on the south end of the pile. The team looked for but could not locate the reported leachate collection sumps. It was determined that, if they existed, they must be beneath the layer of ice and would require substantial effort to access and maintain. The 1300 gallon tank that reportedly contained leachate from the piles was empty. A much large 10,000 gallon (estimated) tank was on site but it could not be verified whether or not it contained liquid. No hoses, fittings, or pumps were visible leading to or from the pile sumps. No workers were present at the ST05 site. |
Debra Caillouet |
| 1/23/2002 |
Update or Other Action |
An NTP was issued to E&E for site sampling |
Debra Caillouet |
| 3/6/2002 |
Update or Other Action |
A draft NOV was sent to the Air Force |
Debra Caillouet |
| 4/8/2002 |
Update or Other Action |
Comments were provided to the Air Force on a draft scope of work to investigate remove and treat soil at OT01 and ST05 |
Debra Caillouet |
| 4/25/2002 |
Update or Other Action |
Staff participated in a site inspection and public meeting with the 611th Air Force and AFCEE. The former fuel tank area, ST05 was found to have several deficiencies. When the 2000 yards of soil was treated earlier this year, the materials from the stockpile were left on-site in a large pile instead of being properly disposed. There was also some debris left from the soil burner, wire, bolts and washers, broken wrenches etc. The stockpile that was built from soils excavated from around the USTs at the Grant Point site was still collecting water. The tanks present that were represented by the former contractor as being used to store runoff from the stockpile were empty. A connex was on site and contained the carbon units that were used to treat the impounded water from OT01 and what appeared to be the liners from the impound and former stockpile there. There was evidence of several run off channels leading to the beach. These were noted by Jacobs as areas to sample when funding for work becomes available.
At the Grant Point UST site the first thing observed was that the majority of the seed mat had been rolled up by the wind, only stopping at the vertical culvert that was place to identify the center of the UST excavation. The roll is about 1000 feet long. Some seed does appear to be left on the landfill cap but it may not be adequate to create a grass cover. There were a couple areas observed where the UST excavation had been eroded apparently by the discharge of the wastewater from the impoundment. The impoundments were open and there was some sloughing of material on the sides. Fish and Wildlife was consulted on safety risks posed by the open impoundment excavations. The opinion was that the sides were not steep enough to cause a problem. There was no surface evidence of contaminated soil left, although there were erosion channels present leading down to the Quonset hut area. These were noted for sampling when funding becomes available. Two connex were found near the Quonset hut containing seed mat and ground staples. An excavator was also left. The Air Force will work through legal channels to determine ownership and how they can be removed from the area.
The community was satisfied that the Air Force was working to make things right with respect to the cleanup and obtaining payment for services provided by various entities within the community in support of last years work. They were pleased that the spill area noted on the Grant Point Road is being quickly addressed and provided input that a road closure of a day or two to excavate the contaminated soils would be best before September. |
Debra Caillouet |
| 10/8/2002 |
Update or Other Action |
Staff approved work plan for addressing cleanup of OT01 and ST05. |
Debra Caillouet |
| 10/13/2002 |
Update or Other Action |
Staff approved location for new stockpile to contain soils from OT01 that are in a poorly constructed stockpile at ST05. |
Debra Caillouet |
| 11/11/2002 |
Update or Other Action |
DEC received a letter report indicating the contactor left water saturated contaminated soils at the former stockpile location and did not remove the liner. They also found at least a partial liner with the same problem left by a former contractor and documented surface soil contamination from previous site activities. |
Debra Caillouet |
| 12/31/2002 |
Update or Other Action |
Staff sent the Air Force a letter requesting a firm schedule for a work plan to address all site contamination. |
Debra Caillouet |
| 4/23/2003 |
Cleanup Plan Approved |
The Thermal Treatment Operations Plan was approved along with an addendum to the environmental cleanup plan. A low temperature thermal desorbtion unit will be used, a.k.a. a rotary kiln to treat, 1000 cubic yards of diesel contaminated soil currently stockpiled at the site. An additional 5,000 cubic yards of soil is planned for excavation and treatment. Additional site characterization will occur to assure all contamination present will be identified and treated, assuming adequate funding is available. |
Debra Caillouet |
| 12/22/2003 |
GIS Position Updated |
TopoZone, NAD27 |
Debra Caillouet |
| 3/3/2004 |
Update or Other Action |
Staff received and approved report describing the remedial actions that occurred at the site in 2002 and 2003. The soil cleanup levels established in the decision document were met. Groundwater monitoring to verify natural attenuation is planned. |
Debra Caillouet |
| 2/14/2005 |
Update or Other Action |
Staff reviewed and submitted comments on the Groundwater Sampling and Analysis Report dated Jan 2005 |
Debra Caillouet |
| 8/22/2005 |
Update or Other Action |
Staff reviewed the semi annual groundwater report and sent a comment letter the Air Force containing the following: The report presents the results of the May 2005 groundwater monitoring event that sampled and analyzed eleven monitoring wells at the OT01 and ST05 sites. A twelfth well, OT01-MW4 was not sampled as it contained 0.02 feet of free product. One well at ST05 contained diesel range organics of 1.6 mg/L. The depth to groundwater was also measured at each of the twelve monitoring wells.
The depth to groundwater reported for MW2 at OT01 in this report shows a significant drop from 35.21 feet below ground surface (bgs) during the September 2004 event to 38.89 feet bgs in May. All other monitoring wells show an increase in the groundwater elevation. Please review the records to verify this result.
In the comment letter, DEC sent to you last February regarding the September 2004 groundwater monitoring event, DEC disagreed with the proposed reduction of the frequency of the monitoring events. There was no discussion between the Air Force and DEC to resolve this comment. 18 AAC 75.345 (h) states that quarterly sampling should occur for at least one year and that the department will evaluate the information yearly. DEC is again requesting that groundwater water sampling for OT01 and ST05 be performed quarterly for at least one year, this was approved in the Environmental Cleanup Plan, October 2002, yet has not been implemented. It is possible that during the winter when infiltration of precipitation is minimal that the groundwater elevation is dropping enough to allow the accumulation of free product that was found in OT01 MW5 rather than the speculated construction deficiencies. Instituting quarterly monitoring should assist in resolving this dilemma.
This report recommends samples collected during the next groundwater monitoring event include analysis of the appropriate electron donor/electron acceptor pairs to assess natural attenuation. DEC supports this recommendation and requests that these parameters be collected three times in one year to assess accurately the rate of natural attenuation. Data obtained at the next scheduled event during the fall of 2005, could be biased high due to the expected warmer temperatures contributing to accelerated reaction rates.
The recommendations include a trend analysis as suggested in the Final Remediation Process Optimization (RPO) Handbook. DEC does not object and supports including other aspects of the RPO, specifically the Protectiveness Evaluation. This recommends that the Phase I RPO document that:
• the remediation approach is adequately containing contamination to prevent migration toward potential human or ecological receptors;
• appropriate land and groundwater use restrictions are being enforced to prevent undesirable risks due to uncontrolled exposure to contaminants; and,
• review the regulatory decision document(s) to ensure that the current system complies with regulatory requirements.
The RPO handbook also recommends that an effective monitoring system will reduce the level of uncertainty regarding the spatial and temporal distribution of contaminants and recommends the use of two references that are applicable to the Cold Bay sites: the AFCEE Long-Term Monitoring Optimization Guide, and the AFCEE Technical Protocol for Implementing Intrinsic Remediation with Long-Term Monitoring Option for Dissolved-Phase Fuel Contamination in Groundwater. DEC supports this recommendation and requests that these documents be used to guide your analysis of the site monitoring.
There are also several outstanding commitments from the Decision Documents that DEC has previously requested the Air Force address. The Air Force has committed to annual inspections of OT01 and LF02 and to filling sinkholes and erosion channels with clean fill and to grade and revegetate as necessary. DEC is not aware of any erosion issues, but the revegetation is not complete. Final grading, seeding, and an as-built survey are also required for the landfill at OT01. Institutional controls in the form of recording the as-built surveys of the landfills at OT01 and LF02 in the land records also need to be established. Institutional controls, notice in the land record, are also needed at ST05 to document that if the contaminated soil remaining on site, is excavated or exposed in the future it must be managed in accordance with the laws and regulations applicable at that time. This notice in the record should also document that groundwater should not be used as a drinking water source until cleanup levels are met.
Please advise DEC of the schedule for implementing these actions that were agreed to in February 2001.
DEC has not received a final copy of the previous groundwater monitoring report that incorporates responses to our comment letter of February 2005. Please provide the DEC with a copy of the final document. |
Debra Caillouet |
| 3/3/2006 |
Long Term Monitoring Established |
Staff reviewed and sent an approval letter to the Air Force for the Report ST05 Monitored Natural Attenuation Evaluation, Cold Bay, Alaska, Draft January 2006.
The report evaluates the rate of natural attenuation of diesel range organics (DRO) in the groundwater and concludes that it exceeds the rate of dissolution of DRO into the groundwater.
The parameters that were evaluated were dissolved oxygen, nitrate/nitrite, manganese, iron, sulfate/sulfide, and methane. The results indicated that all of the electron acceptors were being utilized and provided the basis of the stoichiometric analysis of the aerobic and anaerobic biological activity.
The report recommends, based on the rate of biodegradation, the depth of the remaining DRO in soil and land use controls that prevent the use of groundwater as a source of drinking water, monitoring of the groundwater be reduced in frequency from twice a year to once every two years. DEC concurs with this conclusion. Therefore, DEC will expect the next round of groundwater sampling to occur in 2007. DEC requests the Air Force execute the groundwater sampling in the same month for all subsequent events to enhance the comparability of the data from event to event.
|
Debra Caillouet |
| 9/26/2007 |
Institutional Control Record Established |
The site is subject to five year reviews, the next should occur in 2012 |
Debra Caillouet |
| 4/29/2008 |
Update or Other Action |
A determination of No Further Remedial Action Planned under CERCLA was recieved from EPA for the USAF Cold Bay AFS.
EPA CERCLIS IS AK0570028639 |
Debra Caillouet |
| 7/1/2008 |
Update or Other Action |
The draft ST05 Monitored Natural Attenuation (MNA) Report presents the results of groundwater sampling at five wells located at the former fuel tank site. Four of the five wells did not contain contaminants above the 18 AAC 75.345 Table C groundwater cleanup levels. MW-06 which is located in the source area contained diesel range organics (DRO) in September 2007 of 3.4 mg/l.
Based on measurements of various MNA parameters biodegradation of the DRO is occurring but it is expected that it will be many years before the cleanup level of 1.5 mg/l DRO is attained. The report recommends an additional monitoring well be installed directly downgradient of the highest known source area and that this well be used to determine when cleanup levels are met. The report also recommends one more bi-annual groundwater sampling event in the fall of 2009 and then monitoring every five years.
The Alaska Department of Environmental Conservation has no objections to implementing these recommendations. Please provide a letter work plan for DEC review before installing the new monitoring well.
|
Debra Caillouet |
| 8/25/2008 |
Long Term Monitoring Established |
The final ST05 Monitored Natural Attenuation (MNA) Report presents the results of groundwater sampling at five wells located at the former fuel tank site. Four of the five wells did not contain contaminants above the 18 AAC 75.345 Table C groundwater cleanup levels. MW-06 which is located in the source area contained diesel range organics (DRO) in September 2007 of 3.4 mg/l.
Based on measurements of various MNA parameters biodegradation of the DRO is occurring but it is expected that it will be many years before the cleanup level of 1.5 mg/l DRO is attained. The report recommends an additional monitoring well be installed directly downgradient of the highest known source area and that this well be used to determine when cleanup levels are met. The report also recommends one more bi-annual groundwater sampling event in the fall of 2009 and then monitoring every five years.
The Alaska Department of Environmental Conservation has no objections to implementing these recommendations and approves the long-term monitoring plan under 18 AAC 75.360 Cleanup Operations.
|
Debra Caillouet |
| 9/4/2009 |
Document, Report, or Work plan Review - other |
Letter Work Plan Cold Bay LRRS 2009 Long-Term Monitoring and Ground Water Sampling September 2009 |
Debra Caillouet |
| 2/23/2010 |
Document, Report, or Work plan Review - other |
Final Long Term Monitoring Report, ST05, Cold Bay Long Range Radar Site, February 2010
The next monitoring event for ST05 is scheduled in five years or 2014. The report also recommends that the monitoring wells be repaired in the near future. Items entered in task tracker |
Debra Caillouet |
| 4/19/2010 |
Document, Report, or Work plan Review - other |
Staff reviewed and concurred with the Long Term Monitoring Optimization for POL Storage Area, ST005, Cold Bay Long Range Radar Station, Cold Bay Alaska, April 2010
Based on the results of groundwater monitoring the document recommends decommissioning MW-5, MW-7 and MW-8. Three other monitoring wells would be maintained, one in the source area and two downgradient near the point where the groundwater meets the surface water. Previously DEC has agreed with decreasing the frequency of groundwater monitoring to every five years.
|
Debra Caillouet |
| 9/15/2010 |
Document, Report, or Work plan Review - other |
Draft Work Plan, Monitoring Well Repair and Decommissioning, Cold Bay LRRS, September 2010
The work plan for decommissioning monitoring wells 5, 7 and 8 at the ST05, former Tank Farm site and the repair as needed for the remaining three wells.
|
Debra Caillouet |
| 11/17/2010 |
Update or Other Action |
MW5, 7 & 8 were decommissioned. MW3 and 9 were repaired. |
Debra Caillouet |
| 8/30/2011 |
Site Visit |
|
Debra Caillouet |
| 7/31/2012 |
CERCLA ROD Periodic Review |
2nd five year review approved. At ST05 a soil removal action completed in 2003 removed contaminated soil to a depth of 15 feet below ground surface. The site was surveyed and the survey has been recorded documenting the prohibition on use of the groundwater as a drinking water source. The groundwater at the site contains diesel range organics above the cleanup level of 1.5 mg/l. The Air Force completed a Long Term Monitoring and Optimization Report in 2010 recommending three of the six monitoring wells be decommissioned. This occurred in 2010. The next groundwater sampling event scheduled for 2016 prior to the next Five Year Review in 2017. The review determined the remedy was still protective. |
Debra Caillouet |
| 4/25/2014 |
Document, Report, or Work plan Review - other |
Final Work Plan Environmental Long Term Management at Cold Bay Long Range Radar Site, April 2014 was approved. Three monitoring wells will be sampled |
Debra Caillouet |
| 4/25/2014 |
Document, Report, or Work plan Review - other |
Final Work Plan Environmental Long Term Management at Cold Bay Long Range Radar Site, April 2014 |
Debra Caillouet |
| 12/11/2014 |
Document, Report, or Work plan Review - other |
Groundwater Monitoring Report, Draft, Environmental Long Term Management, Cold Bay Long Range Radar Site, December 2014
At ST-005, three groundwater samples and a duplicate were obtained. These samples were in transit from Cold Bay to San Jose California from August 1 to August 4, 2014 and were received at the laboratory at 11.5º C. It is not possible to determine the maximum temperature at which these samples were exposed. The maximum allowable temperature is 6º C. There was no custody seal on the cooler. All results are to be shown as estimated due to temperature exceedance and biased low. ADEC will not allow the results of these samples to be used to determine if the concentration trend is stable or decreasing. ADEC suggests that laboratories closer to the site be used in the future to prevent/minimize this issue.
The report documents the destruction and removal of the locks on two of the monitoring wells and the removal by drilling of the bolts for the cap on the flush mount well. The Air Force should secure these wells as soon as possible to prevent tampering.
|
Debra Caillouet |
| 1/22/2015 |
Document, Report, or Work plan Review - other |
Groundwater Monitoring Report, Final, Environmental Long Term Management,
Cold Bay Long Range Radar Site, January 2015
|
Debra Caillouet |
| 8/31/2015 |
Update or Other Action |
This file has been partially archived at Alaska Archives Barcode 896973 Box 407 |
Susan Carberry |
| 8/2/2016 |
Document, Report, or Work plan Review - other |
DEC Approved the 2016 Groundwater Sampling and Analysis Plan. The proposed work is being conducted in accordance with the requirements of the decision document and includes the sampling of three existing groundwater monitoring wells: ST005-MW3; ST005-MW6; and ST005-MW9. |
Monte Garroutte |
| 12/26/2017 |
Document, Report, or Work plan Review - other |
DEC approved the document Long-Term Monitoring (LTM) of Groundwater at ST005, dated November 2017 describing 2016 LTM activities. The 2016 LTM activities included sampling three monitoring wells (ST005-MW3, ST005-MW6 and ST005-MW9) for diesel range organics (DRO). Concentrations of DRO during the 2016 sampling event increased from the sampling event in 2014. The three monitoring wells at this site will continue to be monitored until DRO concentrations are below DEC cleanup levels for three consecutive events. The next round of LTM sampling will occur in 2018. |
Erica Blake |
| 4/6/2018 |
Document, Report, or Work plan Review - other |
DEC approved the 2017 Five-Year Review Report for Sites LF002, OT001, and ST005 at Cold Bay Long Range Radar Station (LRRS) sites in Cold Bay, Alaska, dated March 2018. There are no immediate threats from the three sites, and the remedies remain protective. Cover inspections for LF002 and OT001 are performed every 5 years. Groundwater monitoring is conducted in accordance with the remedy requirements in the Decision Document for ST005. The next Five-Year Review is required five years from the U.S. Air Force (USAF) signature date on the 2017 Five-Year Review document. |
Erica Blake |
| 4/15/2020 |
Document, Report, or Work plan Review - other |
2019 Long Term Monitoring activities were conducted in November, 2019. Activities included the collection of groundwater samples from ST005, the performance of LUC inspections at ST005, OT001 and LF002, an inspection of the landfill cap at LF002, and the installation
of LUC signage at each of the three sites. |
Darren Mulkey |
| 3/28/2023 |
Document, Report, or Work plan Review - other |
DEC submitted comments for the Draft 2022 Five-Year Review Report for LF002, OT001, and ST005 at Cold Bay Long Range Radar Station, Alaska, dated March 2023.This is the second Five Year Review (FYR) for the Mile 6 Landfill (LF002) and the fourth FYR for the POL Tank Farm (ST005) and the White Alice Communication Site (OT001). All sites are located at the Cold Bay Long Range Radar Station, located in Kodiak, Alaska. The report evaluates the institutional control inspections and monitoring activities conducted at these sites to determine if the remedies being implemented continue to be protective of human health and the environment. Recommendations included replacing signage and updating the geographical site boundaries at LF002, revegetating the exposed geofabric areas at OT001, and analyzing surface water if encountered at ST005 for PAHs and BTEX for TAH and TAqH calculations. |
Ginna Quesada |
| 3/31/2023 |
Document, Report, or Work plan Review - other |
DEC approved the Final 2022 Five-Year Review Report for LF002, OT001, and ST005 at Cold Bay Long Range Radar Station, Alaska, dated March 2023. |
Ginna Quesada |
| 12/18/2023 |
CERCLA PA |
On this date, DEC received the Final Preliminary Assessment Report for Aqueous Film-Forming Foam Areas, Cold Bay Long Range Radar Site, Alaska dated December 2023. Based on the review of readily available records, no FTAs or non-FTAs associated with the storage, use, or release of AFFF were identified and recommended for No Further Remedial Action Planned for AFFF sources.
DEC sent a Letter of Acknowledgement regarding the NFRAP. Investigation and evaluation of separate, non-AFFF PFAS source areas, will occur under a separate contract. |
Cascade Galasso-Irish |
| 6/11/2024 |
Long Term Monitoring Workplan or Report Review |
DEC provided comments for the "Draft Final Uniform Federal Policy for Quality Assurance Project Plan (UFP-QAPP) for Long-Term Management at Cold Bay Long Range Radar Site, Cold Bay, Alaska (dated May 2024)" to the U.S. Air Force. The UFP-QAPP proposes groundwater sampling at three monitoring wells at ST005, and land-use control(LUC)/institutional control (IC) inspections for all three Cold Bay Radio Relay Station (RRS) sites (LF002, OT001 and ST005). The proposed long-term monitoring work is planned to occur this upcoming 2024 field season. |
Erica Blake |
| 6/24/2024 |
Long Term Monitoring Workplan or Report Review |
DEC provided responses to comments for the "Draft Final Uniform Federal Policy for Quality Assurance Project Plan for Long-Term Management at Cold Bay Long Range Radar Site, Cold Bay, Alaska (dated May 2024)" to the U.S. Air Force. All responses to comments were accepted, and a final copy of the work plan was requested for a comment backcheck prior to DEC providing approval. |
Brian Watts |
| 8/13/2024 |
Long Term Monitoring Workplan or Report Review |
DEC provided approval for the "Final Uniform Federal Policy for Quality Assurance Project Plan for Long-Term Management at Cold Bay Long Range Radar Site, Cold Bay, Alaska, (dated June 2024)" to the U.S. Air Force. All responses to comments were incorporated to the final document. |
Erica Blake |
| 7/2/2025 |
Document, Report, or Work plan Review - other |
DEC provided comments for the Draft Final 2024 Remedial Action Operations, Institutional Controls/land Use Controls Report Cold Bay Long Range Radar Site, Alaska Sites LF002, OT001, and ST005, Dated June 2025.The report presents the results from the institutional control inspections at the Mile 6 Landfill (LF002), the POL Tank Farm (ST005) and the White Alice Communication Site (OT001). All sites are located at the Cold Bay Long Range Radar Station, located in Cold Bay, Alaska. In addition to site inspections, groundwater sampling for diesel range organics was conducted at ST005. All sampling results were below DEC’s Table C groundwater cleanup levels. The report recommended the continuation of site inspections every five years for all sites and continued groundwater monitoring at ST005. |
Ginna Quesada |
| 9/2/2025 |
Document, Report, or Work plan Review - other |
DEC provided responses to comments for the "Draft-Final 2024 Remedial Action Operations, Institutional Controls/Land Use Controls Report, Cold Bay Long Range Radar Site, Alaska Sites LF002, OT001 and ST005 (dated August 2025)" to the U.S. Air Force. Responses to comments were reviewed and accepted. A clean final report was requested for approval. |
Erica Blake |
| 9/5/2025 |
Long Term Monitoring Workplan or Report Review |
DEC provided approval for the "Final 2024 Remedial Action Operations, Institutional Controls/Land Use Controls Report, Cold Bay Long Range Radar Site, Alaska Sites LF002, OT001 and ST005 (dated September 2025)" to the U.S. Air Force. Inspections at all three sites were completed to confirm land use controls were functioning as intended. DRO results at ST005 have been below cleanup levels since 2008, it is recommended that one additional round of sampling be completed to verify the concentrations of DRO. |
Erica Blake |
