Site Report: Cape Newenham LRRS SS07

Site Name:	Cape Newenham LRRS SS07
Address:	SS07 PCBS at Upper Camp, 30 Mi. South of Platinum, Platinum, AK 99651
File Number:	2525.38.001
Hazard ID:	526
Status:	Cleanup Complete - Institutional Controls
Staff:	Sarah Bernhardt, 9072697527 sarah.bernhardt@alaska.gov
Latitude:	58.650000
Longitude:	-162.172500
Horizontal Datum:

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

Site Chronology
IC / Closure Details
Documents
Associated Sites

Problems/Comments

SS07 PCBs at Upper Camp primary source (electrical substation) has been removed, and secondary source (contaminated soil) has been capped in place, with exception to the PCB-contamination encountered on the steep mountainside areas of the site (resulting from dump

Action Information

Action Date	Action	Description	DEC Staff
1/1/1985	Preliminary Assessment Approved	Site assessment by Engineering Science entitled "IRP Phase I Report, Southern Region LRRS", prepared for the USAF Engineering Service Center. The site assessment identified six potentially contaminated areas at the site. The report recommended follow-up action for the site.	Former Staff
8/26/1987	Update or Other Action	Site visit made by Woodward Clyde and U.S. Air Force personnel to the site in August 1987. The purpose was to gather further assessment information at the site to support a no further action document (NFAD).	Former Staff
1/1/1988	Update or Other Action	(Old R:Base Action Code = SI - Site Investigation). Site visit and sampling conducted by Ecological Services, Anchorage. PCBs up to 3096 ppm discovered in the soil.	Former Staff
1/7/1991	Site Number Identifier Changed	Old Reckey 1981210912709 changed to reflect correct region.	Former Staff
6/30/1994	Update or Other Action	PCB-Contaminated Soil Removal Work Plan - Informational Memorandum (dated June 30, 1994) received on July 7, 1994.	Ray Burger
2/6/1995	Meeting or Teleconference Held	SS07 Risk Assessment scoping meeting between ADEC, FWS, Air Force and consultants, and COE.	Ray Burger
4/19/1995	Meeting or Teleconference Held	Meeting on April 19, 1995 between ADEC, Air Force, and COE to discuss SS07 Remedial Action Alternatives (letter report undated).	Ray Burger
5/22/1995	Update or Other Action	PCB Investigation Field Report (dated May 1995) and received on May 22, 1995.	Ray Burger
5/25/1995	Update or Other Action	Design Proposal for Capping PCB Site at Upper Camp (SS07) dated May 11, 1995, received on May 25, 1995.	Ray Burger
6/16/1995	Update or Other Action	Fish & Wildlife Service Cape Newenham Trip Report (dated June 16, 1995).	Ray Burger
8/22/1995	Update or Other Action	(Old R:Base Action Code = RI - Remedial Investigation). RI action added by Shannon and Wilson on 3/13/97, based on Relative Risk Evaluation Worksheet dated 8/22/95. Pathways: surface soils have been impacted by PCBs. Receptors: site workers, visitors, several endangered and/or threatened species. This site is located in Togiak National Wildlife Refuge.	S&W-Miner
11/3/1995	Update or Other Action	Engineering Evaluation/Cost Analysis (EE/CA) for PCB Contamination at the Upper Camp (SS07) dated October 1995 and received on November 3, 1995.	Ray Burger
1/2/1996	Update or Other Action	Follow-up Letter Regarding the TCLP Results Presented in the December 15, 1995, Letter Report for PCBs at IRP Site SS07 - PCBs at Upper Camp (dated January 3, 1996) received on January 2, 1996.	Ray Burger
1/11/1996	Update or Other Action	Letter Report Presenting Toxicity Characteristic Leachate Procedure (TCLP) Results for PCBs at IRP Site SS07 - PCBs at Upper Camp (dated December 15, 1995) received on January 11, 1996.	Ray Burger
2/23/1996	Update or Other Action	Letter Report, PCB Sampling at Electrical Substation, Upper Camp (dated February 15, 1996) prepared for Corps of Engineers and by Woodward-Clyde Federal Services; received by ADEC on February 23, 1996.	Ray Burger
2/26/1996	Update or Other Action	Technical Memorandum Conceptual Site Models for Human and Ecological Risk Assessment Upper Camp (dated February 23, 1996) received on February 26, 1996.	Ray Burger
3/11/1996	Update or Other Action	Proposal for Disposal of the Electrical Substation Wood and Metal Debris as Part of the PCB Cap Construction (dated March 11, 1996) received on March 18, 1996.	Ray Burger
3/11/1996	Update or Other Action	Technical Memorandum Regarding the PCB Cap Reconfiguration at Cape Newenham PCB Capping (dated March 1996) received on March 11, 1996.	Ray Burger
3/13/1996	Site Characterization Report Approved	Final Report, Remedial Investigation of PCBs at Upper Camp (SS07) 2 volumes (dated March 1996) prepared for 611th Air Support Group / 611th Civil Engineer Squadron and by Woodward-Clyde; received by ADEC on March 13, 1996.	Ray Burger
3/14/1996	Update or Other Action	Criteria for PCB Contaminated Soil Removal as Part of MAR Tower Foundation Repair Memo (dated March 14, 1996) received March 18, 1996.	Ray Burger
7/1/1996	Update or Other Action	Revised Final Management Action Plan (dated June 1996) received on July 1, 1996.	Ray Burger
2/20/1997	Update or Other Action	1996 Long-Term Monitoring Letter Report - PCB Beach Sampling (draft dated December 20, 1996, final report not received); ADEC comment letter dated February 20, 1997.	Gretchen Pikul
1/9/1998	Update or Other Action	Management Action Plan (draft dated July 25, 1997, final dated January 9, 1998); ADEC comment letter dated December 4, 1997.	Gretchen Pikul
6/17/1998	Update or Other Action	PCB-Contaminated Soil Sampling Workplan, Upper Camp Substation, Beach, and Pond Sample Locations (draft dated June 1998, no final workplan received); ADEC comment letter dated June 17, 1998.	Gretchen Pikul
7/20/1998	Update or Other Action	Human Health and Ecological Risk Assessment Workplan for PCBs at Upper Camp (final dated February 1997; AF transmittal letter with response to comments as an addendum to clarify issues; received by ADCE on July 20, 1998); teleconference on December 9, 1996; ADEC comment letter dated December 19, 1996; more ADEC comments in letter dated January 7, 1997; 2nd comment resolution meeting on April 3, 1998; response to comments dated May 7, 1998; ADEC approval letter dated July 10, 1998.	Gretchen Pikul
7/22/1998	Risk Assessment Report Approved	Final Risk Assessment report for PCBs at Upper Camp - process went from ADEC-approved workplan to final report which is not acceptable; ADEC sent report out for contractor review, comments were received October 20, 1997; ADEC internal teleconference on October 29, 1997; ADEC comment letter dated December 15, 1997; comment resolution meeting on April 3, 1998; ADEC received Response to Comments on May 20, 1998; ADEC concurrence letter issued on July 10, 1998; final report dated February 1997, response to comments dated May 1998, ADEC received on July 22, 1998 (risk assessment was not revised from final draft form due to Air Force budgetary constraints, no critical data missing from final draft, and comment letters and response to comments were bound into the final version for completeness); Air Force request ADEC to send out 2nd (more specific) concurrence letter, sent on December 10, 1998.	Gretchen Pikul
2/19/1999	Update or Other Action	1998 PCB Sampling Long-Term Monitoring report (dated January 29, 1999) prepared by Woodward-Clyde, and received by ADEC on February 19, 1999.	Gretchen Pikul
7/2/1999	Update or Other Action	1997 PCB Cap Monitoring Letter Report received on July 2, 1999; comment resolution meeting on several sampling events on June 28, 1999.	Gretchen Pikul
9/27/1999	Update or Other Action	1998 PCB Sampling Long-Term Monitoring report (draft dated November 10, 1998 and received by ADEC on May 28, 1999; final dated and received in September 1999) conducted by Air Force inhouse staff, second sampling of the 1998 field season; ADEC comment letter dated June 17, 1999, no 1997 monitoring data or letter report received by ADEC; comment resolution meeting on several sampling events on June 28, 1999.	Gretchen Pikul
10/13/1999	Site Added to Database	PCBs and waste oil from electrical substation.	Gretchen Pikul
10/15/1999	Site Ranked Using the AHRM	Initial ranking.	Gretchen Pikul
5/9/2000	Proposed Plan	Proposed Plan (PP) for Cleanup at Upper Camp (SS07) and Drum Disposal Site (LF03) and Decision Document (DD) for Upper Camp (SS07) - draft dated 7-99, received 10-4-99); 10-99 telephone calls - ADEC response not available until Drum Removal Report comments are addressed and report is finalized; ADEC teleconference with Mark Ader (EPA) on SS07 draft DD; initial ADEC comment letter for SS07 and LF03 PP and SS07 draft DD dated 12-99; comment resolution meeting for SS07 and LF03 PP and SS07 DD; ADEC comment letter dated 3-1-00 for LF03 DD; final Proposed Plan for Upper Camp (SS07) and Drum Disposal Site (LF03) dated May 2000, public comment period May 8 to June 8, public meeting upon request.	Gretchen Pikul
9/7/2000	Update or Other Action	PCB Cap Monitoring and Maintenance workplan - draft received August 2000; ADEC comment letter dated September 2000.	Gretchen Pikul
11/1/2000	Update or Other Action	1999 PCB Cap Monitoring and Maintenance Upper Camp (SS07) technical report (undated and received by ADEC on November 1, 2000); conducted by Bethel Native Corporation International, Inc.	Gretchen Pikul
11/1/2000	Update or Other Action	Technical Report for PCB Cap Monitoring and Maintenance Upper Camp (SS07) 1999 Sampling Report - ADEC received final on 11-1-00 with no Air Force coordination for draft deliverable or ADEC review.	Gretchen Pikul
4/17/2001	Conditional Closure Approved	Administrative action	Evonne Reese
4/17/2001	Record of Decision	Final Decision Document for Upper Camp (SS07) dated November 15, 2000, 1st version signed by ADEC on November 21, 2000 (AF attorney changed wording in Declaration and Statutory Determinations), 2nd version signed by ADEC on March 6, 2001 and by Air Force on March 30, 2001. The Air Force will maintain long-term ownership of the site and take responsibility for inspecting and maintaining the existing cap at SS07. Placement of warning and restricted access signs will limit human access. The site will be restricted to future uses that would not affect the integrity of the cap (e.g., excavation, residential/commercial development). The site will be inspected annually to ensure the integrity of the cap and the condition of warning signs. Cap and sign maintenance will be performed as necessary based on the results of the visual inspection. Institutional controls will consist of notation on land records that will be reviewed during a title search of required land use restrictions and notation in the facility base master plan. These will include notification that the land has been used for PCB waste disposal, and certain restrictions apply to future use of the property. Further, the notification will include a comprehensive record of the capped area survey, the signage and cap maintenance requirements, applicable cleanup levels, and documentation of location and corresponding levels of PCBs present in the area. ADEC initial comment letter dated 12-22-99.	Gretchen Pikul
4/17/2001	Institutional Control Record Established	See Record of Decision Signed entry for April 17, 2001.	Gretchen Pikul
7/13/2001	Site Number Identifier Changed	Cape Newenham LRRS site, Reckey 198125X912709, was disseminated into nine component sites and this is one of them.	Former Staff
8/2/2001	Update or Other Action	2000 Final PCB Cap Monitoring and Maintenance (dated August 2, 2001) conducted in September 2000, and Air Force Memorandum to address ADEC comment letter dated June 15, 2001.	Gretchen Pikul
7/2/2002	Update or Other Action	Site inspection of PCB cap; ADEC received call on June 28, 2002 from Air Force regarding contractor excavation into cap material for use as fill along newly-installed arctic walkway; sampling and surveying determined no direct exposure pathway to PCB was made from excavation activities; see memo and 2002 cap monitoring and maintenance report for details.	Gretchen Pikul
7/9/2002	Long Term Monitoring Established	PCB Cap Monitoring and Maintenance work plan; draft dated April 2002, received on May 1, 2002; ADEC comment letter dated June 11, 2002; comment resolution meeting July 2, 2002; ADEC approval letter dated July 9, 2002.	Gretchen Pikul
11/6/2002	Site Ranked Using the AHRM	Changed the Environmental/Recreation Area Value from 0 to 2 because this site is located in Togiak National Wildlife Refuge.	Former Staff
4/10/2003	Update or Other Action	PCB Cap Monitoring and Maintenance; draft dated October 2002 and received October 31, 2003; ADEC comment letter dated December 13, 2002; draft final dated December 2002 and received January 13, 2003; ADEC approval letter dated February 7, 2003; final dated March 2003 and received April 10, 2003. Air Force memo addressing ADEC concerns on 2002 drum removal from site stream bank (dated January 10, 2002).	Gretchen Pikul
5/14/2004	Update or Other Action	2004 PCB Cap Monitoring and Maintenance Work Plan; draft dated January 2004; ADEC comment letter dated February 19, 2004; comment resolution call on February 20, 2004; 2nd draft work plan received March 30, 2004; ADEC conditional approval letter dated April 9, 2004; ADEC received final work plan (dated March 2004) on May 14, 2004 and all issues were addressed.	Gretchen Pikul
3/10/2005	Update or Other Action	Report - 2004 PCB Cap Monitoring and Maintenance; draft dated November 2004 received November 17; ADEC comment letter dated December 20, 2004; final report dated January 2005 received March 2, 2005 all issues from December 20 comment letter were addressed; ADEC approval letter dated March 10, 2005.	Jeff Norberg
2/15/2006	Update or Other Action	First Five-Year Review for SS07 Upper Camp PCB Spill; draft dated August 2005 received August 30; ADEC comment letter October 12; Final dated December 2005 received Feb 15 2006	Jeff Norberg
3/7/2006	Update or Other Action	Work Plan - 2006 PCB Cap Monitoring and Maintenance SS-07; draft dated March 2006 received February 27, 2006; ADEC comment letter dated March 7.	Jeff Norberg
2/12/2007	Update or Other Action	Report - 2006 PCB Cap Monitoring and Maintenance; draft dated November 2006 received November 7; Final dated December 2006 received Feb 12, 2007	Jeff Norberg
9/27/2007	Update or Other Action	EPA determined no further remedial action is planned (NFRAP) under Superfund	Jeff Brownlee
12/11/2007	Update or Other Action	File number given: 2525.38.001	Nicole Hurt
9/11/2009	Update or Other Action	DEC received the final "PCB Cap Monitoring and Maintenance (SS007) Cape Newenham LRRS" report dated Sept 2009. The report describes an inspection by the Air Force project manager on August 25,2009. The gravel cap over the residual PCB contaminated soil at this site located at the upper camp was reported to be intact and in good shape; two out of three outdoor signs and the map in the radome enterance were in place and legible; one sign that was to be on the old transformer building foundation was missing (as was reported in the prior inspection)and needs to be replaced in 2010; no sampling was conducted (on biennial sampling schedule).	John Halverson
8/19/2010	Document, Report, or Work plan Review - other	Staff reviewed the draft 2010 SS007 Long-term Monitorning Work Plan and submitted comments to the Air Force. After resolving responses to comments, ADEC approved the final work plan. Monitoring objectives include inspection of the cap atop the PCB contaminated soil at top camp, inspection of the warning signs posted at the site, and the collection of soil samples for PCB analysis from the hillside down gradient of the capped soil to assess whether or not any migration of PCB contamination has occurred.	Curtis Dunkin
2/14/2011	Document, Report, or Work plan Review - other	Staff reviewed the draft 2011 report of the long-term monitoring conducted by the Air Force at SS007 in 2010 and submitted comments to the Air Force. After resolving responses to comments, ADEC approved the final 2011 report; which concluded that there were no compromises to the integrity and effectiveness of the cap. Soil sample analysis results indicated that high levels of PCB contamination continue be be dispersed in areas across the hillside down gradient of the cap. Warning signs that were previously known to have come down were replaced.	Curtis Dunkin
3/11/2011	CERCLA ROD Periodic Review	ADEC reviewed an invitation from the Air Force to submit a CERCLA Five-year Review interview record for the 2010 Second Five-year Review Report for SS007. ADEC reviewed the 2001 ROD as well as monitoring results and site activities from the previous five years and submitted comments to the Air Force. ADEC expressed concern about the very high concentrations of PCBs (exceeding 300,000 mg/kg) which have been detected in soil samples collected from the hillside that is down gradient from the cap and requested the Air Force to reassess the risks to exposure and contaminant migration.	Curtis Dunkin
6/13/2011	CERCLA ROD Periodic Review	Staff reviewed the draft 2011 Second Five-year Review Report and submitted comments to the Air Force. ADEC expressed concern about the very high concentrations of PCBs (exceeding 300,000 mg/kg) which have been detected in soil samples collected from the hillside that is down gradient from the cap and requested the Air Force to reassess the risks to exposure and contaminant migration.	Curtis Dunkin
9/14/2011	Site Visit	Staff participated in a site inspection of the gravel cap and the PCB-contaminated mountainside at the Upper Camp. Staff also participated in a post-inspection comment resolution meeting with Air Force project managers to address issues pertaining to the 2011 draft five-year review as well as develop a consensus for the path forward for site SS07. Analytical results from soil samples taken within the past 5-year long-term monitoring period (2005-2010) have determined that PCB contamination levels in soil on the steep mountainside are significantly higher than previously identified.	Curtis Dunkin
9/15/2011	Meeting or Teleconference Held	Staff participated in a comment resolution meeting with project managers from the Air Force and USFWS to review and finalize the determinations and recommendations for the current as well as the next 5-year review for site SS07. The protectiveness determination for ecological receptors is deferred. Further investigation and site characterization is planned for 2011-2015 in order to demonstrate whether or not migration is or is not occuring from either under the gravel cap or from the contaminated mountainside. The Air Force will conduct a technical review to determine whether any remedial alternatives exists which would be both technically implementable as well as cost-benefit feasible in regards to the contminated mountainside.	Curtis Dunkin
1/23/2012	Document, Report, or Work plan Review - other	Staff reviewed the draft 2011 Site Inspection Report and submitted comments to the Air Force. After resolution of responses to comments, ADEC approved the final report. The report documented the results and conclusions of the site inspection that was conducted in September 2011 by representatives from the Air Force, ADEC, and the USFWS.	Curtis Dunkin
2/23/2012	CERCLA ROD Periodic Review	Staff reviewed the Final Second Five-Year Review Report (dated February 2012) which was signed and approved by John Halverson. The USAF certified that the remedies selected for Site SS007 (Upper Camp at Cape Newenham LRRS), remain protective of human health, but the protectiveness determination of ecological receptors is deferred at this time. ADEC determined that the sudden and dramatic increase of known PCB concentrations (exceeding 300,000 mg/kg) in the surface soil on the mountainside below the cap suggest that the exposure assumptions used in the 1996 risk assessment for the remedy are no longer valid. Other follow up actions to be performed by the Air Force as a result of this second five-year review report include: 1) develop a more effective institutional controls/land use controls management strategy; 2) continue the biennial upper mountain side soil sampling and resume sampling the previously sampled down gradient pond areas; 3) reevaluate the risk of the remedial action for ecological receptors based on the newly available site, toxicity, and exposure data; and 4) complete a technical review and feasibility study of remedial actions for the uncapped PCB-contaminated soil along the upper mountainside. The Air Force will also work with the Bureau of Land Management and the US Fish and Wildlife Service to discuss future documentation of land use controls in real property records. The next five-year will be completed by March, 2016.	Curtis Dunkin
8/27/2012	Document, Report, or Work plan Review - other	ADEC-CS staff reviewed the draft 2012 Long-term Monitoring Work Plan and submitted comments to the Air Force. After resolution of comments, ADEC approved the final work plan. This year's monitoring and sampling efforts will include sampling of sediment in ponds located down gradient of the PCB-contaminated hillside to characterize the potential extent of contaminant migration.	Curtis Dunkin
6/24/2014	Document, Report, or Work plan Review - other	ADEC-CS staff reviewed the draft 2014 Site SS007 Long-term Monitoring (LTM) Work Plan and submitted comments to the Air Force. ADEC-CS staff also reviewed and determined the Air Force's subsequent responses to ADEC's comments to be adequate; ADEC submitted approval to the Air Force to finalize and implement the work plan.	Curtis Dunkin
8/11/2016	CERCLA ROD Periodic Review	ADEC reviewed the draft 2016 3rd Five-year Review Report and submitted comments to the Air Force.	Curtis Dunkin
6/21/2017	Document, Report, or Work plan Review - other	ADEC reviewed the draft 2016 SS007 Top Camp Long-term Management Inspection Report and submitted comments to the Air Force.	Curtis Dunkin
8/29/2017	Document, Report, or Work plan Review - other	Staff reviewed draft supplemental long term monitoring work plan titled 2017-2018 Remedial Action Operations, Land Use/Institutional Control Cape Newenham Long Range Radar Station Sites CS545, SS007, and TA001 dated August 2017 and received electronically by the ADEC on August 18, 2017 for an expedited review, and provided comments to the Air Force.	Wendy Hansen
9/8/2017	Document, Report, or Work plan Review - other	Staff approved supplemental long term monitoring work plan titled 2017-2018 Remedial Action Operations, Land Use/Institutional Control Cape Newenham Long Range Radar Station Sites CS545, SS007, and TA001 dated August 2017.	Wendy Hansen
10/2/2017	Document, Report, or Work plan Review - other	ADEC reviewed the Air Force's responses to comment for the draft 2016 SS007 Top Camp Long-term Management Inspection Report and submitted comments to the Air Force.	Wendy Hansen
1/2/2018	Document, Report, or Work plan Review - other	ADEC reviewed the draft 2017 SS007 Top Camp Long-term Management Inspection Report and submitted comments to the Air Force.	Wendy Hansen
1/29/2018	Document, Report, or Work plan Review - other	ADEC reviewed the Air Force's additional responses to comment for the draft 2016 SS007 Top Camp Long-term Management Inspection Report and submitted comments to the Air Force.	Wendy Hansen
2/14/2018	Document, Report, or Work plan Review - other	ADEC reviewed the Air Force's responses to comment for the draft 2017 SS007 Top Camp Long-term Management Inspection Report and submitted comments to the Air Force.	Wendy Hansen
5/2/2018	CERCLA Proposed Plan	DEC provided comments to draft Proposed Plan for Remedial Action Cape Newenham Long Range Radar Station, Alaska ERP Site SS007. The proposed plan presented cleanup alternatives proposed by the USAF for the SS007 mountainside. FS Alternative 2 Removal, Long-term Monitoring, and LUCs was selected with an ACL of 160 mg/kg. Concurrence from the EPA and USFWS is needed to approve the ACL.	Wendy Hansen
7/20/2018	CERCLA Proposed Plan	DEC provided review determinations for Responses to Comments (RTCs) to the draft Proposed Plan for Remedial Action Cape Newenham Long Range Radar Station, Alaska ERP Site SS007. The RTCs were provided by the Air Force on June 25, 2018, along with a revised Proposed Plan. Resolution is still needed for some comments. USFWS concurrence is needed for DEC to approve the ACL for PCBs.	Wendy Hansen
8/20/2018	Document, Report, or Work plan Review - other	DEC approved the Final 2016 Long Term Monitoring Report, Final Summary Report 2016 Remedial Action Operations, Land Use/ Institutional Control Cape Newenham LRRS, dated July 2018. DEC comments have been addressed.	Wendy Hansen
8/23/2018	Document, Report, or Work plan Review - other	DEC approved the Final 2017 Long Term Monitoring Report, Final 2017 Technical Project Report 2017 Remedial Action Operations, Land Use/Institutional Control Cape Newenham LRRS, dated August 2018. DEC comments have been addressed. This report was also applicable for CS545 and TA001 interim LUCs.	Wendy Hansen
9/21/2018	CERCLA Proposed Plan	DEC approved the Proposed Plan for Remedial Action Cape Newenham Long Range Radar Station, Alaska ERP Site SS007.	Wendy Hansen
8/30/2019	Update or Other Action	DEC provided comments to a draft ROD Amendment for Site SS007. The purpose of the amendment is to address PCB-contaminated soil remaining at the uncapped Upper Mountainside area at SS007.	Wendy Hansen
2/7/2020	Document, Report, or Work plan Review - other	Staff reviewed the draft long term monitoring report titled Draft 2019 Technical Project Report, 2019 Remedial Action Operations, Land Use/Institutional Control Cape Newenham LRRS dated January 2020, and provided comments to the Air Force. The report documented IC signage and site inspection at three sites (CS545, TA001, and SS007), collection of 17 surface soil samples downgradient of the SS007 cap, the collection of one groundwater monitoring sample at CS545, and installation of 10 soil borings at TA001.	Wendy Hansen
3/20/2020	Update or Other Action	DEC approved finalization of the ROD Amendment for Site SS007. The purpose of the amendment is to address PCB-contaminated soil remaining at the uncapped Upper Mountainside area at SS007. All comments were satisfactorily addressed. The original ROD remedy selected for the Upper Mountainside area of Site SS007 was capping the flat area around the radar dome and adjacent parking area, and long-term monitoring (LTM) with institutional controls (ICs). The original remedy did not include remedial actions to address PCB contaminated soils on the mountainside (Upper Mountainside area). It was determined that the conditions at the Upper Mountainside area did not present unacceptable threats to either human health or the environment and because of extreme terrain (30- to 40-degree slope of loose rocks)and climatic conditions (high winds and poor visibility) (USAF, 2000). However, post-ROD investigations and a revised ecological risk assessment (ERA) (USAF, 2014b) determined that, in some locations, PCB concentrations in soil in the Upper Mountainside area presented an unacceptable level of risk to ecological receptors. The elevated PCB concentrations were detected at the Upper Mountainside area as a result of the long-term monitoring and sampling strategy for Site SS007 and are not the result of increased migration of contaminants from the capped area (Upper Camp area) (USAF, 2012). Therefore, the original remedy for Site SS007 is being amended to address the uncapped Upper Mountainside area of the site, the capped Upper Camp area does not require amendment, through the addition of the following response actions: a)Removal of soil in target treatment areas with concentrations above 160 mg/kg, b)Long-term Monitoring, c)Land use controls, and d) Five-Year Reviews. This ROD amendment is pending signatures.	Wendy Hansen
4/30/2020	Document, Report, or Work plan Review - other	Staff approved the 2019 LTM Report for CS545, TA001, and SS007 titled: Final 2019 Technical Project Report 2019 Remedial Action Operations, Land Use/Institutional Control Cape Newenham LRRS Contract Number: W911KB-14-D-0007-0008 which is dated April 2020. All comments were satisfactorily addressed.	Wendy Hansen
7/28/2020	Document, Report, or Work plan Review - other	DEC reviewed the Final Supplemental Work Plan: 2020 Remedial Action Operations, Land Use/Institutional Control, Cape Newenham Long Range Radar Station Sites CS545, SS007, and TA001, LRRS Contract Number: W911KB-19-C-0017 which is dated July 2020. Following discussion about the use of peristaltic pumps, DEC approved the field work with the understanding that a final workplan would be submitted that addresses all comments.	Janice Wiegers
9/10/2020	Document, Report, or Work plan Review - other	The Final Supplemental Workplan, dated August 2020, was resubmitted with email discussions added to the plan. DEC responded with a formal letter approval on 9/17/2020.	Janice Wiegers
12/2/2020	Document, Report, or Work plan Review - other	DRAFT 2020 Remedial Action Operations, Land Use/Institutional Control report submitted by Bethel Environmental Services, LLC. A visual inspection was completed at TA001, CS 545, and SS007. Surface water from a seep was sampled near the TA001 former pumphouse. Petroleum compounds, chloroform, and pentachlorophenol were detected below 18AAC75 Table C groundwater cleanup levels. Four soil borings (SB11-SB14) were also installed to 10 ft bgs or bedrock in the tank area to further delineate soil contamination. SB14, located 30 ft northeast of the tank, was the most contaminated, with petroleum compounds, 1,2-dichloroethane, and trichloroethane present between 5-10 ft bgs. DEC responded with comments on 3/11/21.	Janice Wiegers
2/4/2021	Document, Report, or Work plan Review - other	Draft Remedial Action Work Plan submitted; approximately 8 cy of PCB contaminated soil will be removed from the northern slope beneath the capped PCB contamination at SS007. The soil will be vacuumed and hand dug down to approximately 2 inches in order to reduce contamination on the steep slope. An ecologically-based alternative cleanup level of 160 mg/kg will be used. Silt fences, and dust samplers will also be deployed to check for downslope migration of contaminants in 2022. DEC sent comments to the plan on 3/16/21.	Janice Wiegers
2/16/2021	Document, Report, or Work plan Review - other	Draft 2020 Remedial Action Operations, Land Use/Institutional Controls Report submitted by EA Engineering. The report documented IC signage and site inspection at three sites (CS545, TA001, and SS007), collection of 24 surface soil samples downgradient of the SS007 cap, repair of the northern edges of the cap, and collection of one groundwater monitoring sample at CS545. PCBs were detected above the DEC cleanup level in 17 samples downgradient of the SS007 cap, with the highest concentration at 1,520 mg/kg. DEC responded with comments on 3/12/21.	Janice Wiegers
3/4/2021	Meeting or Teleconference Held	DEC met with the Air Force and contractors to discuss site history, recent submittals and expected outcomes of site work at SS007, TA001, and CS545.	Janice Wiegers
3/23/2021	Update or Other Action	DEC received a response to comments for the DRAFT 2020 Remedial Action Operations, Land Use/Institutional Control report submitted by Bethel Environmental Services, LLC. DEC replied on 4/16/21.	Janice Wiegers
4/9/2021	Update or Other Action	DEC received a response to comments for the Draft 2020 Remedial Action Operations, Land Use/Institutional Controls Report submitted by EA Engineering. DEC responded with additional comments on 5/24 and requested final report for approval. Final report was received and letter approving the report was sent on 8/10/21.	Janice Wiegers
5/17/2021	Document, Report, or Work plan Review - other	DEC received response to comments for the Draft Remedial Action Work Plan on 5/17/21. Approved comments after follow up discussion regarding coordination with EPA's TSCA program. The Air Force indicated that coordination with TSCA occurred during the initial development of the risk-based cleanup level for PCBs.	Janice Wiegers
6/11/2021	Update or Other Action	Received draft final of Northwind's Long Term Monitoring QAPP, contract #W911KB-20-D-0012. Reviewed and signed signature page on 6/25/2021. This document was first sent by the Air Force on 6/4, but was not received by DEC.	Janice Wiegers
6/18/2021	CERCLA ROD Approved	ROD Amendment for Site SS07 signed by all parties.	Janice Wiegers
6/28/2021	CERCLA Removal Action Plan	DEC approved the final work plan titled 2021-2022 Remdial Action-Construction Cape Newenham LRRS Contract Number: FA8903-17-D-0057 for additional cleanup of PCB-contaminated at the downslope edge of SS07.	Janice Wiegers
6/28/2021	Update or Other Action	Air Force resubmitted the Draft Final Cape Newenham QAPP for Long Term Monitoring at CS545, TA001, and SS07. This was first submitted on 6/4, but not received until 6/11. Comments requested by 7/6.	Janice Wiegers
7/6/2021	Meeting or Teleconference Held	Meeting with the Air Force and their contractors to discuss the long-term monitoring plan and finalization of the 2020 Remedial Action Operations, Land Use/Institutional Controls Report. DEC and the Air Force discussed ongoing characterization efforts at TA001 and status of a decision document for TA001 and CS545.	Janice Wiegers
7/6/2021	Update or Other Action	DEC commented on the DRAFT Final Uniform Federal Policy for Quality Assurance Project Plan for Long-Term Management and Remedial Action Operation Activities Cape Newnham Long Range Radar Station, Alaska, March 2021, Contract No. W911KB-20-D-0012. Air Force response received and letter sent to Air Force approving the plan on 8/13/21.	Janice Wiegers
3/31/2022	Offsite Soil or Groundwater Disposal Approved	Approved transport of 14 cubic yards of PCB contaminated soil to Chemical Waste Management of NW in Arlington, OR.	Janice Wiegers
3/31/2022	Offsite Soil or Groundwater Disposal Approved	Approved transport of 14 cubic yards of PCB contaminated soil from the Upper Camp soil cleanup work to a RCRA Subtitle C facility in Arlington Oregon.	Janice Wiegers
9/19/2022	Document, Report, or Work plan Review - other	DEC approved the report titled Final 2021 Remedial Action Operations Land Use/Institutional Control Report Cape Newenham Long Range Radar Site Cape Newenham, Alaska Site SS007, TA001, and CS545, Contract Number: W911KB-20-D-0012.	Brandi Tolsma
12/22/2022	Document, Report, or Work plan Review - other	DEC approved the Final December 2022 Fourth Five-year Review Report for Cape Newenham LRRS Site SS007.	Brandi Tolsma
12/22/2022	Document, Report, or Work plan Review - other	DEC approved the Final December 2022 Fourth Five-year Review Report for Cape Newenham LRRS Site SS007.	Brandi Tolsma
12/30/2022	Document, Report, or Work plan Review - other	DEC approved the report titled “Final Remedial Action Construction Report Cape Newenham Long Range Radar Station Cape Newenham, Alaska Site SS007” dated December 2022. During the summer of 2021, EA Engineering excavated 14 cubic yards of PCB-contaminated soil from the area down slope of the Upper Camp and installed silt fencing, airborne dust samplers, and saltation samplers to measure PCBs migrating down slope of the contaminated area. Confirmation sampling indicated PCBs were removed to the approved cleanup level. An ecological survey for the Lapland Longspur and Common Shrew was also completed and two land use control signs were installed at the east and west boundaries of SS007.	Brandi Tolsma
3/15/2023	Document, Report, or Work plan Review - other	DEC approved the report titled “Final Technical Memorandum for 2022 Field Activities Long-Term Management and Land Use Control/Institutional Control Inspections at the Upper Camp Site SS007, Cape Newenham Long Range Radar Station, Cape Newenham, Alaska” dated March 2023. The report indicated high winds and snow loads had damaged much of the air sampling equipment and destroyed land use control signs. The contractor recommended installing flush mounted signs.	Brandi Tolsma
3/28/2023	Document, Report, or Work plan Review - other	Supplemental Site Characterization Work Plan/UFP QAP Site TA001 submitted. This workplan proposed additional soil and groundwater characterization for the TA001 tank area, former pumphouse, and former pipeline at the Lower Camp. DEC reviewed the workplan and provided comments on 5/10/2023. Also discussed file and database organization for TA001 which has been handled under the SS07 site but should be addressed separately, or possibly in POI-1. DEC and the Air Force will discuss organization of these sites in the future.	Janice Wiegers

Action Date

Action

Description

DEC Staff

1/1/1985

Preliminary Assessment Approved

Site assessment by Engineering Science entitled "IRP Phase I Report, Southern Region LRRS", prepared for the USAF Engineering Service Center. The site assessment identified six potentially contaminated areas at the site. The report recommended follow-up action for the site.

Former Staff

8/26/1987

Update or Other Action

Site visit made by Woodward Clyde and U.S. Air Force personnel to the site in August 1987. The purpose was to gather further assessment information at the site to support a no further action document (NFAD).

Former Staff

1/1/1988

Update or Other Action

(Old R:Base Action Code = SI - Site Investigation). Site visit and sampling conducted by Ecological Services, Anchorage. PCBs up to 3096 ppm discovered in the soil.

Former Staff

1/7/1991

Site Number Identifier Changed

Old Reckey 1981210912709 changed to reflect correct region.

Former Staff

6/30/1994

Update or Other Action

PCB-Contaminated Soil Removal Work Plan - Informational Memorandum (dated June 30, 1994) received on July 7, 1994.

Ray Burger

2/6/1995

Meeting or Teleconference Held

SS07 Risk Assessment scoping meeting between ADEC, FWS, Air Force and consultants, and COE.

Ray Burger

4/19/1995

Meeting or Teleconference Held

Meeting on April 19, 1995 between ADEC, Air Force, and COE to discuss SS07 Remedial Action Alternatives (letter report undated).

Ray Burger

5/22/1995

Update or Other Action

PCB Investigation Field Report (dated May 1995) and received on May 22, 1995.

Ray Burger

5/25/1995

Update or Other Action

Design Proposal for Capping PCB Site at Upper Camp (SS07) dated May 11, 1995, received on May 25, 1995.

Ray Burger

6/16/1995

Update or Other Action

Fish & Wildlife Service Cape Newenham Trip Report (dated June 16, 1995).

Ray Burger

8/22/1995

Update or Other Action

(Old R:Base Action Code = RI - Remedial Investigation). RI action added by Shannon and Wilson on 3/13/97, based on Relative Risk Evaluation Worksheet dated 8/22/95. Pathways: surface soils have been impacted by PCBs. Receptors: site workers, visitors, several endangered and/or threatened species. This site is located in Togiak National Wildlife Refuge.

S&W-Miner

11/3/1995

Update or Other Action

Engineering Evaluation/Cost Analysis (EE/CA) for PCB Contamination at the Upper Camp (SS07) dated October 1995 and received on November 3, 1995.

Ray Burger

1/2/1996

Update or Other Action

Follow-up Letter Regarding the TCLP Results Presented in the December 15, 1995, Letter Report for PCBs at IRP Site SS07 - PCBs at Upper Camp (dated January 3, 1996) received on January 2, 1996.

Ray Burger

1/11/1996

Update or Other Action

Letter Report Presenting Toxicity Characteristic Leachate Procedure (TCLP) Results for PCBs at IRP Site SS07 - PCBs at Upper Camp (dated December 15, 1995) received on January 11, 1996.

Ray Burger

2/23/1996

Update or Other Action

Letter Report, PCB Sampling at Electrical Substation, Upper Camp (dated February 15, 1996) prepared for Corps of Engineers and by Woodward-Clyde Federal Services; received by ADEC on February 23, 1996.

Ray Burger

2/26/1996

Update or Other Action

Technical Memorandum Conceptual Site Models for Human and Ecological Risk Assessment Upper Camp (dated February 23, 1996) received on February 26, 1996.

Ray Burger

3/11/1996

Update or Other Action

Proposal for Disposal of the Electrical Substation Wood and Metal Debris as Part of the PCB Cap Construction (dated March 11, 1996) received on March 18, 1996.

Ray Burger

3/11/1996

Update or Other Action

Technical Memorandum Regarding the PCB Cap Reconfiguration at Cape Newenham PCB Capping (dated March 1996) received on March 11, 1996.

Ray Burger

3/13/1996

Site Characterization Report Approved

Final Report, Remedial Investigation of PCBs at Upper Camp (SS07) 2 volumes (dated March 1996) prepared for 611th Air Support Group / 611th Civil Engineer Squadron and by Woodward-Clyde; received by ADEC on March 13, 1996.

Ray Burger

3/14/1996

Update or Other Action

Criteria for PCB Contaminated Soil Removal as Part of MAR Tower Foundation Repair Memo (dated March 14, 1996) received March 18, 1996.

Ray Burger

7/1/1996

Update or Other Action

Revised Final Management Action Plan (dated June 1996) received on July 1, 1996.

Ray Burger

2/20/1997

Update or Other Action

1996 Long-Term Monitoring Letter Report - PCB Beach Sampling (draft dated December 20, 1996, final report not received); ADEC comment letter dated February 20, 1997.

Gretchen Pikul

1/9/1998

Update or Other Action

Management Action Plan (draft dated July 25, 1997, final dated January 9, 1998); ADEC comment letter dated December 4, 1997.

Gretchen Pikul

6/17/1998

Update or Other Action

PCB-Contaminated Soil Sampling Workplan, Upper Camp Substation, Beach, and Pond Sample Locations (draft dated June 1998, no final workplan received); ADEC comment letter dated June 17, 1998.

Gretchen Pikul

7/20/1998

Update or Other Action

Human Health and Ecological Risk Assessment Workplan for PCBs at Upper Camp (final dated February 1997; AF transmittal letter with response to comments as an addendum to clarify issues; received by ADCE on July 20, 1998); teleconference on December 9, 1996; ADEC comment letter dated December 19, 1996; more ADEC comments in letter dated January 7, 1997; 2nd comment resolution meeting on April 3, 1998; response to comments dated May 7, 1998; ADEC approval letter dated July 10, 1998.

Gretchen Pikul

7/22/1998

Risk Assessment Report Approved

Final Risk Assessment report for PCBs at Upper Camp - process went from ADEC-approved workplan to final report which is not acceptable; ADEC sent report out for contractor review, comments were received October 20, 1997; ADEC internal teleconference on October 29, 1997; ADEC comment letter dated December 15, 1997; comment resolution meeting on April 3, 1998; ADEC received Response to Comments on May 20, 1998; ADEC concurrence letter issued on July 10, 1998; final report dated February 1997, response to comments dated May 1998, ADEC received on July 22, 1998 (risk assessment was not revised from final draft form due to Air Force budgetary constraints, no critical data missing from final draft, and comment letters and response to comments were bound into the final version for completeness); Air Force request ADEC to send out 2nd (more specific) concurrence letter, sent on December 10, 1998.

Gretchen Pikul

2/19/1999

Update or Other Action

1998 PCB Sampling Long-Term Monitoring report (dated January 29, 1999) prepared by Woodward-Clyde, and received by ADEC on February 19, 1999.

Gretchen Pikul

7/2/1999

Update or Other Action

1997 PCB Cap Monitoring Letter Report received on July 2, 1999; comment resolution meeting on several sampling events on June 28, 1999.

Gretchen Pikul

9/27/1999

Update or Other Action

1998 PCB Sampling Long-Term Monitoring report (draft dated November 10, 1998 and received by ADEC on May 28, 1999; final dated and received in September 1999) conducted by Air Force inhouse staff, second sampling of the 1998 field season; ADEC comment letter dated June 17, 1999, no 1997 monitoring data or letter report received by ADEC; comment resolution meeting on several sampling events on June 28, 1999.

Gretchen Pikul

10/13/1999

Site Added to Database

PCBs and waste oil from electrical substation.

Gretchen Pikul

10/15/1999

Site Ranked Using the AHRM

Initial ranking.

Gretchen Pikul

5/9/2000

Proposed Plan

Proposed Plan (PP) for Cleanup at Upper Camp (SS07) and Drum Disposal Site (LF03) and Decision Document (DD) for Upper Camp (SS07) - draft dated 7-99, received 10-4-99); 10-99 telephone calls - ADEC response not available until Drum Removal Report comments are addressed and report is finalized; ADEC teleconference with Mark Ader (EPA) on SS07 draft DD; initial ADEC comment letter for SS07 and LF03 PP and SS07 draft DD dated 12-99; comment resolution meeting for SS07 and LF03 PP and SS07 DD; ADEC comment letter dated 3-1-00 for LF03 DD; final Proposed Plan for Upper Camp (SS07) and Drum Disposal Site (LF03) dated May 2000, public comment period May 8 to June 8, public meeting upon request.

Gretchen Pikul

9/7/2000

Update or Other Action

PCB Cap Monitoring and Maintenance workplan - draft received August 2000; ADEC comment letter dated September 2000.

Gretchen Pikul

11/1/2000

Update or Other Action

1999 PCB Cap Monitoring and Maintenance Upper Camp (SS07) technical report (undated and received by ADEC on November 1, 2000); conducted by Bethel Native Corporation International, Inc.

Gretchen Pikul

11/1/2000

Update or Other Action

Technical Report for PCB Cap Monitoring and Maintenance Upper Camp (SS07) 1999 Sampling Report - ADEC received final on 11-1-00 with no Air Force coordination for draft deliverable or ADEC review.

Gretchen Pikul

4/17/2001

Conditional Closure Approved

Administrative action

Evonne Reese

4/17/2001

Record of Decision

Final Decision Document for Upper Camp (SS07) dated November 15, 2000, 1st version signed by ADEC on November 21, 2000 (AF attorney changed wording in Declaration and Statutory Determinations), 2nd version signed by ADEC on March 6, 2001 and by Air Force on March 30, 2001. The Air Force will maintain long-term ownership of the site and take responsibility for inspecting and maintaining the existing cap at SS07. Placement of warning and restricted access signs will limit human access. The site will be restricted to future uses that would not affect the integrity of the cap (e.g., excavation, residential/commercial development). The site will be inspected annually to ensure the integrity of the cap and the condition of warning signs. Cap and sign maintenance will be performed as necessary based on the results of the visual inspection. Institutional controls will consist of notation on land records that will be reviewed during a title search of required land use restrictions and notation in the facility base master plan. These will include notification that the land has been used for PCB waste disposal, and certain restrictions apply to future use of the property. Further, the notification will include a comprehensive record of the capped area survey, the signage and cap maintenance requirements, applicable cleanup levels, and documentation of location and corresponding levels of PCBs present in the area. ADEC initial comment letter dated 12-22-99.

Gretchen Pikul

4/17/2001

Institutional Control Record Established

See Record of Decision Signed entry for April 17, 2001.

Gretchen Pikul

7/13/2001

Site Number Identifier Changed

Cape Newenham LRRS site, Reckey 198125X912709, was disseminated into nine component sites and this is one of them.

Former Staff

8/2/2001

Update or Other Action

2000 Final PCB Cap Monitoring and Maintenance (dated August 2, 2001) conducted in September 2000, and Air Force Memorandum to address ADEC comment letter dated June 15, 2001.

Gretchen Pikul

7/2/2002

Update or Other Action

Site inspection of PCB cap; ADEC received call on June 28, 2002 from Air Force regarding contractor excavation into cap material for use as fill along newly-installed arctic walkway; sampling and surveying determined no direct exposure pathway to PCB was made from excavation activities; see memo and 2002 cap monitoring and maintenance report for details.

Gretchen Pikul

7/9/2002

Long Term Monitoring Established

PCB Cap Monitoring and Maintenance work plan; draft dated April 2002, received on May 1, 2002; ADEC comment letter dated June 11, 2002; comment resolution meeting July 2, 2002; ADEC approval letter dated July 9, 2002.

Gretchen Pikul

11/6/2002

Site Ranked Using the AHRM

Changed the Environmental/Recreation Area Value from 0 to 2 because this site is located in Togiak National Wildlife Refuge.

Former Staff

4/10/2003

Update or Other Action

PCB Cap Monitoring and Maintenance; draft dated October 2002 and received October 31, 2003; ADEC comment letter dated December 13, 2002; draft final dated December 2002 and received January 13, 2003; ADEC approval letter dated February 7, 2003; final dated March 2003 and received April 10, 2003. Air Force memo addressing ADEC concerns on 2002 drum removal from site stream bank (dated January 10, 2002).

Gretchen Pikul

5/14/2004

Update or Other Action

2004 PCB Cap Monitoring and Maintenance Work Plan; draft dated January 2004; ADEC comment letter dated February 19, 2004; comment resolution call on February 20, 2004; 2nd draft work plan received March 30, 2004; ADEC conditional approval letter dated April 9, 2004; ADEC received final work plan (dated March 2004) on May 14, 2004 and all issues were addressed.

Gretchen Pikul

3/10/2005

Update or Other Action

Report - 2004 PCB Cap Monitoring and Maintenance; draft dated November 2004 received November 17; ADEC comment letter dated December 20, 2004; final report dated January 2005 received March 2, 2005 all issues from December 20 comment letter were addressed; ADEC approval letter dated March 10, 2005.

Jeff Norberg

2/15/2006

Update or Other Action

First Five-Year Review for SS07 Upper Camp PCB Spill; draft dated August 2005 received August 30; ADEC comment letter October 12; Final dated December 2005 received Feb 15 2006

Jeff Norberg

3/7/2006

Update or Other Action

Work Plan - 2006 PCB Cap Monitoring and Maintenance SS-07; draft dated March 2006 received February 27, 2006; ADEC comment letter dated March 7.

Jeff Norberg

2/12/2007

Update or Other Action

Report - 2006 PCB Cap Monitoring and Maintenance; draft dated November 2006 received November 7; Final dated December 2006 received Feb 12, 2007

Jeff Norberg

9/27/2007

Update or Other Action

EPA determined no further remedial action is planned (NFRAP) under Superfund

Jeff Brownlee

12/11/2007

Update or Other Action

File number given: 2525.38.001

Nicole Hurt

9/11/2009

Update or Other Action

DEC received the final "PCB Cap Monitoring and Maintenance (SS007) Cape Newenham LRRS" report dated Sept 2009. The report describes an inspection by the Air Force project manager on August 25,2009. The gravel cap over the residual PCB contaminated soil at this site located at the upper camp was reported to be intact and in good shape; two out of three outdoor signs and the map in the radome enterance were in place and legible; one sign that was to be on the old transformer building foundation was missing (as was reported in the prior inspection)and needs to be replaced in 2010; no sampling was conducted (on biennial sampling schedule).

John Halverson

8/19/2010

Document, Report, or Work plan Review - other

Staff reviewed the draft 2010 SS007 Long-term Monitorning Work Plan and submitted comments to the Air Force. After resolving responses to comments, ADEC approved the final work plan. Monitoring objectives include inspection of the cap atop the PCB contaminated soil at top camp, inspection of the warning signs posted at the site, and the collection of soil samples for PCB analysis from the hillside down gradient of the capped soil to assess whether or not any migration of PCB contamination has occurred.

Curtis Dunkin

2/14/2011

Document, Report, or Work plan Review - other

Staff reviewed the draft 2011 report of the long-term monitoring conducted by the Air Force at SS007 in 2010 and submitted comments to the Air Force. After resolving responses to comments, ADEC approved the final 2011 report; which concluded that there were no compromises to the integrity and effectiveness of the cap. Soil sample analysis results indicated that high levels of PCB contamination continue be be dispersed in areas across the hillside down gradient of the cap. Warning signs that were previously known to have come down were replaced.

Curtis Dunkin

3/11/2011

CERCLA ROD Periodic Review

ADEC reviewed an invitation from the Air Force to submit a CERCLA Five-year Review interview record for the 2010 Second Five-year Review Report for SS007. ADEC reviewed the 2001 ROD as well as monitoring results and site activities from the previous five years and submitted comments to the Air Force. ADEC expressed concern about the very high concentrations of PCBs (exceeding 300,000 mg/kg) which have been detected in soil samples collected from the hillside that is down gradient from the cap and requested the Air Force to reassess the risks to exposure and contaminant migration.

Curtis Dunkin

6/13/2011

CERCLA ROD Periodic Review

Staff reviewed the draft 2011 Second Five-year Review Report and submitted comments to the Air Force. ADEC expressed concern about the very high concentrations of PCBs (exceeding 300,000 mg/kg) which have been detected in soil samples collected from the hillside that is down gradient from the cap and requested the Air Force to reassess the risks to exposure and contaminant migration.

Curtis Dunkin

9/14/2011

Site Visit

Staff participated in a site inspection of the gravel cap and the PCB-contaminated mountainside at the Upper Camp. Staff also participated in a post-inspection comment resolution meeting with Air Force project managers to address issues pertaining to the 2011 draft five-year review as well as develop a consensus for the path forward for site SS07. Analytical results from soil samples taken within the past 5-year long-term monitoring period (2005-2010) have determined that PCB contamination levels in soil on the steep mountainside are significantly higher than previously identified.

Curtis Dunkin

9/15/2011

Meeting or Teleconference Held

Staff participated in a comment resolution meeting with project managers from the Air Force and USFWS to review and finalize the determinations and recommendations for the current as well as the next 5-year review for site SS07. The protectiveness determination for ecological receptors is deferred. Further investigation and site characterization is planned for 2011-2015 in order to demonstrate whether or not migration is or is not occuring from either under the gravel cap or from the contaminated mountainside. The Air Force will conduct a technical review to determine whether any remedial alternatives exists which would be both technically implementable as well as cost-benefit feasible in regards to the contminated mountainside.

Curtis Dunkin

1/23/2012

Document, Report, or Work plan Review - other

Staff reviewed the draft 2011 Site Inspection Report and submitted comments to the Air Force. After resolution of responses to comments, ADEC approved the final report. The report documented the results and conclusions of the site inspection that was conducted in September 2011 by representatives from the Air Force, ADEC, and the USFWS.

Curtis Dunkin

2/23/2012

CERCLA ROD Periodic Review

Staff reviewed the Final Second Five-Year Review Report (dated February 2012) which was signed and approved by John Halverson. The USAF certified that the remedies selected for Site SS007 (Upper Camp at Cape Newenham LRRS), remain protective of human health, but the protectiveness determination of ecological receptors is deferred at this time. ADEC determined that the sudden and dramatic increase of known PCB concentrations (exceeding 300,000 mg/kg) in the surface soil on the mountainside below the cap suggest that the exposure assumptions used in the 1996 risk assessment for the remedy are no longer valid. Other follow up actions to be performed by the Air Force as a result of this second five-year review report include: 1) develop a more effective institutional controls/land use controls management strategy; 2) continue the biennial upper mountain side soil sampling and resume sampling the previously sampled down gradient pond areas; 3) reevaluate the risk of the remedial action for ecological receptors based on the newly available site, toxicity, and exposure data; and 4) complete a technical review and feasibility study of remedial actions for the uncapped PCB-contaminated soil along the upper mountainside. The Air Force will also work with the Bureau of Land Management and the US Fish and Wildlife Service to discuss future documentation of land use controls in real property records. The next five-year will be completed by March, 2016.

Curtis Dunkin

8/27/2012

Document, Report, or Work plan Review - other

ADEC-CS staff reviewed the draft 2012 Long-term Monitoring Work Plan and submitted comments to the Air Force. After resolution of comments, ADEC approved the final work plan. This year's monitoring and sampling efforts will include sampling of sediment in ponds located down gradient of the PCB-contaminated hillside to characterize the potential extent of contaminant migration.

Curtis Dunkin

6/24/2014

Document, Report, or Work plan Review - other

ADEC-CS staff reviewed the draft 2014 Site SS007 Long-term Monitoring (LTM) Work Plan and submitted comments to the Air Force. ADEC-CS staff also reviewed and determined the Air Force's subsequent responses to ADEC's comments to be adequate; ADEC submitted approval to the Air Force to finalize and implement the work plan.

Curtis Dunkin

8/11/2016

CERCLA ROD Periodic Review

ADEC reviewed the draft 2016 3rd Five-year Review Report and submitted comments to the Air Force.

Curtis Dunkin

6/21/2017

Document, Report, or Work plan Review - other

ADEC reviewed the draft 2016 SS007 Top Camp Long-term Management Inspection Report and submitted comments to the Air Force.

Curtis Dunkin

8/29/2017

Document, Report, or Work plan Review - other

Staff reviewed draft supplemental long term monitoring work plan titled 2017-2018 Remedial Action Operations, Land Use/Institutional Control Cape Newenham Long Range Radar Station Sites CS545, SS007, and TA001 dated August 2017 and received electronically by the ADEC on August 18, 2017 for an expedited review, and provided comments to the Air Force.

Wendy Hansen

9/8/2017

Document, Report, or Work plan Review - other

Staff approved supplemental long term monitoring work plan titled 2017-2018 Remedial Action Operations, Land Use/Institutional Control Cape Newenham Long Range Radar Station Sites CS545, SS007, and TA001 dated August 2017.

Wendy Hansen

10/2/2017

Document, Report, or Work plan Review - other

ADEC reviewed the Air Force's responses to comment for the draft 2016 SS007 Top Camp Long-term Management Inspection Report and submitted comments to the Air Force.

Wendy Hansen

1/2/2018

Document, Report, or Work plan Review - other

ADEC reviewed the draft 2017 SS007 Top Camp Long-term Management Inspection Report and submitted comments to the Air Force.

Wendy Hansen

1/29/2018

Document, Report, or Work plan Review - other

ADEC reviewed the Air Force's additional responses to comment for the draft 2016 SS007 Top Camp Long-term Management Inspection Report and submitted comments to the Air Force.

Wendy Hansen

2/14/2018

Document, Report, or Work plan Review - other

ADEC reviewed the Air Force's responses to comment for the draft 2017 SS007 Top Camp Long-term Management Inspection Report and submitted comments to the Air Force.

Wendy Hansen

5/2/2018

CERCLA Proposed Plan

DEC provided comments to draft Proposed Plan for Remedial Action Cape Newenham Long Range Radar Station, Alaska ERP Site SS007. The proposed plan presented cleanup alternatives proposed by the USAF for the SS007 mountainside. FS Alternative 2 Removal, Long-term Monitoring, and LUCs was selected with an ACL of 160 mg/kg. Concurrence from the EPA and USFWS is needed to approve the ACL.

Wendy Hansen

7/20/2018

CERCLA Proposed Plan

DEC provided review determinations for Responses to Comments (RTCs) to the draft Proposed Plan for Remedial Action Cape Newenham Long Range Radar Station, Alaska ERP Site SS007. The RTCs were provided by the Air Force on June 25, 2018, along with a revised Proposed Plan. Resolution is still needed for some comments. USFWS concurrence is needed for DEC to approve the ACL for PCBs.

Wendy Hansen

8/20/2018

Document, Report, or Work plan Review - other

DEC approved the Final 2016 Long Term Monitoring Report, Final Summary Report 2016 Remedial Action Operations, Land Use/ Institutional Control Cape Newenham LRRS, dated July 2018. DEC comments have been addressed.

Wendy Hansen

8/23/2018

Document, Report, or Work plan Review - other

DEC approved the Final 2017 Long Term Monitoring Report, Final 2017 Technical Project Report 2017 Remedial Action Operations, Land Use/Institutional Control Cape Newenham LRRS, dated August 2018. DEC comments have been addressed. This report was also applicable for CS545 and TA001 interim LUCs.

Wendy Hansen

9/21/2018

CERCLA Proposed Plan

DEC approved the Proposed Plan for Remedial Action Cape Newenham Long Range Radar Station, Alaska ERP Site SS007.

Wendy Hansen

8/30/2019

Update or Other Action

DEC provided comments to a draft ROD Amendment for Site SS007. The purpose of the amendment is to address PCB-contaminated soil remaining at the uncapped Upper Mountainside area at SS007.

Wendy Hansen

2/7/2020

Document, Report, or Work plan Review - other

Staff reviewed the draft long term monitoring report titled Draft 2019 Technical Project Report, 2019 Remedial Action Operations, Land Use/Institutional Control Cape Newenham LRRS dated January 2020, and provided comments to the Air Force. The report documented IC signage and site inspection at three sites (CS545, TA001, and SS007), collection of 17 surface soil samples downgradient of the SS007 cap, the collection of one groundwater monitoring sample at CS545, and installation of 10 soil borings at TA001.

Wendy Hansen

3/20/2020

Update or Other Action

DEC approved finalization of the ROD Amendment for Site SS007. The purpose of the amendment is to address PCB-contaminated soil remaining at the uncapped Upper Mountainside area at SS007. All comments were satisfactorily addressed. The original ROD remedy selected for the Upper Mountainside area of Site SS007 was capping the flat area around the radar dome and adjacent parking area, and long-term monitoring (LTM) with institutional controls (ICs). The original remedy did not include remedial actions to address PCB contaminated soils on the mountainside (Upper Mountainside area). It was determined that the conditions at the Upper Mountainside area did not present unacceptable threats to either human health or the environment and because of extreme terrain (30- to 40-degree slope of loose rocks)and climatic conditions (high winds and poor visibility) (USAF, 2000). However, post-ROD investigations and a revised ecological risk assessment (ERA) (USAF, 2014b) determined that, in some locations, PCB concentrations in soil in the Upper Mountainside area presented an unacceptable level of risk to ecological receptors. The elevated PCB concentrations were detected at the Upper Mountainside area as a result of the long-term monitoring and sampling strategy for Site SS007 and are not the result of increased migration of contaminants from the capped area (Upper Camp area) (USAF, 2012). Therefore, the original remedy for Site SS007 is being amended to address the uncapped Upper Mountainside area of the site, the capped Upper Camp area does not require amendment, through the addition of the following response actions: a)Removal of soil in target treatment areas with concentrations above 160 mg/kg, b)Long-term Monitoring, c)Land use controls, and d) Five-Year Reviews. This ROD amendment is pending signatures.

Wendy Hansen

4/30/2020

Document, Report, or Work plan Review - other

Staff approved the 2019 LTM Report for CS545, TA001, and SS007 titled: Final 2019 Technical Project Report 2019 Remedial Action Operations, Land Use/Institutional Control Cape Newenham LRRS Contract Number: W911KB-14-D-0007-0008 which is dated April 2020. All comments were satisfactorily addressed.

Wendy Hansen

7/28/2020

Document, Report, or Work plan Review - other

DEC reviewed the Final Supplemental Work Plan: 2020 Remedial Action Operations, Land Use/Institutional Control, Cape Newenham Long Range Radar Station Sites CS545, SS007, and TA001, LRRS Contract Number: W911KB-19-C-0017 which is dated July 2020. Following discussion about the use of peristaltic pumps, DEC approved the field work with the understanding that a final workplan would be submitted that addresses all comments.

Janice Wiegers

9/10/2020

Document, Report, or Work plan Review - other

The Final Supplemental Workplan, dated August 2020, was resubmitted with email discussions added to the plan. DEC responded with a formal letter approval on 9/17/2020.

Janice Wiegers

12/2/2020

Document, Report, or Work plan Review - other

DRAFT 2020 Remedial Action Operations, Land Use/Institutional Control report submitted by Bethel Environmental Services, LLC. A visual inspection was completed at TA001, CS 545, and SS007. Surface water from a seep was sampled near the TA001 former pumphouse. Petroleum compounds, chloroform, and pentachlorophenol were detected below 18AAC75 Table C groundwater cleanup levels. Four soil borings (SB11-SB14) were also installed to 10 ft bgs or bedrock in the tank area to further delineate soil contamination. SB14, located 30 ft northeast of the tank, was the most contaminated, with petroleum compounds, 1,2-dichloroethane, and trichloroethane present between 5-10 ft bgs. DEC responded with comments on 3/11/21.

Janice Wiegers

2/4/2021

Document, Report, or Work plan Review - other

Draft Remedial Action Work Plan submitted; approximately 8 cy of PCB contaminated soil will be removed from the northern slope beneath the capped PCB contamination at SS007. The soil will be vacuumed and hand dug down to approximately 2 inches in order to reduce contamination on the steep slope. An ecologically-based alternative cleanup level of 160 mg/kg will be used. Silt fences, and dust samplers will also be deployed to check for downslope migration of contaminants in 2022. DEC sent comments to the plan on 3/16/21.

Janice Wiegers

2/16/2021

Document, Report, or Work plan Review - other

Draft 2020 Remedial Action Operations, Land Use/Institutional Controls Report submitted by EA Engineering. The report documented IC signage and site inspection at three sites (CS545, TA001, and SS007), collection of 24 surface soil samples downgradient of the SS007 cap, repair of the northern edges of the cap, and collection of one groundwater monitoring sample at CS545. PCBs were detected above the DEC cleanup level in 17 samples downgradient of the SS007 cap, with the highest concentration at 1,520 mg/kg. DEC responded with comments on 3/12/21.

Janice Wiegers

3/4/2021

Meeting or Teleconference Held

DEC met with the Air Force and contractors to discuss site history, recent submittals and expected outcomes of site work at SS007, TA001, and CS545.

Janice Wiegers

3/23/2021

Update or Other Action

DEC received a response to comments for the DRAFT 2020 Remedial Action Operations, Land Use/Institutional Control report submitted by Bethel Environmental Services, LLC. DEC replied on 4/16/21.

Janice Wiegers

4/9/2021

Update or Other Action

DEC received a response to comments for the Draft 2020 Remedial Action Operations, Land Use/Institutional Controls Report submitted by EA Engineering. DEC responded with additional comments on 5/24 and requested final report for approval. Final report was received and letter approving the report was sent on 8/10/21.

Janice Wiegers

5/17/2021

Document, Report, or Work plan Review - other

DEC received response to comments for the Draft Remedial Action Work Plan on 5/17/21. Approved comments after follow up discussion regarding coordination with EPA's TSCA program. The Air Force indicated that coordination with TSCA occurred during the initial development of the risk-based cleanup level for PCBs.

Janice Wiegers

6/11/2021

Update or Other Action

Received draft final of Northwind's Long Term Monitoring QAPP, contract #W911KB-20-D-0012. Reviewed and signed signature page on 6/25/2021. This document was first sent by the Air Force on 6/4, but was not received by DEC.

Janice Wiegers

6/18/2021

CERCLA ROD Approved

ROD Amendment for Site SS07 signed by all parties.

Janice Wiegers

6/28/2021

CERCLA Removal Action Plan

DEC approved the final work plan titled 2021-2022 Remdial Action-Construction Cape Newenham LRRS Contract Number: FA8903-17-D-0057 for additional cleanup of PCB-contaminated at the downslope edge of SS07.

Janice Wiegers

6/28/2021

Update or Other Action

Air Force resubmitted the Draft Final Cape Newenham QAPP for Long Term Monitoring at CS545, TA001, and SS07. This was first submitted on 6/4, but not received until 6/11. Comments requested by 7/6.

Janice Wiegers

7/6/2021

Meeting or Teleconference Held

Meeting with the Air Force and their contractors to discuss the long-term monitoring plan and finalization of the 2020 Remedial Action Operations, Land Use/Institutional Controls Report. DEC and the Air Force discussed ongoing characterization efforts at TA001 and status of a decision document for TA001 and CS545.

Janice Wiegers

7/6/2021

Update or Other Action

DEC commented on the DRAFT Final Uniform Federal Policy for Quality Assurance Project Plan for Long-Term Management and Remedial Action Operation Activities Cape Newnham Long Range Radar Station, Alaska, March 2021, Contract No. W911KB-20-D-0012. Air Force response received and letter sent to Air Force approving the plan on 8/13/21.

Janice Wiegers

3/31/2022

Offsite Soil or Groundwater Disposal Approved

Approved transport of 14 cubic yards of PCB contaminated soil to Chemical Waste Management of NW in Arlington, OR.

Janice Wiegers

3/31/2022

Offsite Soil or Groundwater Disposal Approved

Approved transport of 14 cubic yards of PCB contaminated soil from the Upper Camp soil cleanup work to a RCRA Subtitle C facility in Arlington Oregon.

Janice Wiegers

9/19/2022

Document, Report, or Work plan Review - other

DEC approved the report titled Final 2021 Remedial Action Operations Land Use/Institutional Control Report Cape Newenham Long Range Radar Site Cape Newenham, Alaska Site SS007, TA001, and CS545, Contract Number: W911KB-20-D-0012.

Brandi Tolsma

12/22/2022

Document, Report, or Work plan Review - other

DEC approved the Final December 2022 Fourth Five-year Review Report for Cape Newenham LRRS Site SS007.

Brandi Tolsma

12/22/2022

Document, Report, or Work plan Review - other

DEC approved the Final December 2022 Fourth Five-year Review Report for Cape Newenham LRRS Site SS007.

Brandi Tolsma

12/30/2022

Document, Report, or Work plan Review - other

DEC approved the report titled “Final Remedial Action Construction Report Cape Newenham Long Range Radar Station Cape Newenham, Alaska Site SS007” dated December 2022. During the summer of 2021, EA Engineering excavated 14 cubic yards of PCB-contaminated soil from the area down slope of the Upper Camp and installed silt fencing, airborne dust samplers, and saltation samplers to measure PCBs migrating down slope of the contaminated area. Confirmation sampling indicated PCBs were removed to the approved cleanup level. An ecological survey for the Lapland Longspur and Common Shrew was also completed and two land use control signs were installed at the east and west boundaries of SS007.

Brandi Tolsma

3/15/2023

Document, Report, or Work plan Review - other

DEC approved the report titled “Final Technical Memorandum for 2022 Field Activities Long-Term Management and Land Use Control/Institutional Control Inspections at the Upper Camp Site SS007, Cape Newenham Long Range Radar Station, Cape Newenham, Alaska” dated March 2023. The report indicated high winds and snow loads had damaged much of the air sampling equipment and destroyed land use control signs. The contractor recommended installing flush mounted signs.

Brandi Tolsma

3/28/2023

Document, Report, or Work plan Review - other

Supplemental Site Characterization Work Plan/UFP QAP Site TA001 submitted. This workplan proposed additional soil and groundwater characterization for the TA001 tank area, former pumphouse, and former pipeline at the Lower Camp. DEC reviewed the workplan and provided comments on 5/10/2023. Also discussed file and database organization for TA001 which has been handled under the SS07 site but should be addressed separately, or possibly in POI-1. DEC and the Air Force will discuss organization of these sites in the future.

Janice Wiegers

Contaminant Information

Name	Level Description	Media	Comments
PCBs - Total	> Human Health/Ingestion/Inhalation	Soil
PCBs - Total	> Human Health/Ingestion/Inhalation	Soil

Name

Level Description

Media

Comments

PCBs - Total

> Human Health/Ingestion/Inhalation

Soil

PCBs - Total

> Human Health/Ingestion/Inhalation

Soil

Control Type

Type	Details
Land Use Plan / Maps / Base Master Plan	Institutional controls will consist of notation on land records that will be reviewed during a title search of required land use restrictions and notation in the facility base master plan. These will include notification that the land has been used for PCB-waste disposal, and certain restrictions apply to the future use of the property. Further, the notification will include a comprehensive record of the capped area survey, the signage and cap maintenance requirements, applicable cleanup levels,

Type

Details

Land Use Plan / Maps / Base Master Plan

Institutional controls will consist of notation on land records that will be reviewed during a title search of required land use restrictions and notation in the facility base master plan. These will include notification that the land has been used for PCB-waste disposal, and certain restrictions apply to the future use of the property. Further, the notification will include a comprehensive record of the capped area survey, the signage and cap maintenance requirements, applicable cleanup levels,

Requirements

Description	Details
Excavation / Soil Movement Restrictions	The site will be restricted from future uses that would affect the integrity of the cap (e.g., excavation, residential/ commercial development).
Maintenance / Inspection Of Engineering Controls	Earthen cap constructed at SS07 to cover PCB-contaminated soils and debris from a demolished electrical substation building. Placement of warning and restricted access signs will limit human access. The site will be inspected annually to ensure the integrity of the cap and the condition of warning signs. PCB Cap Inspection Tech Memo-annually
Surface water monitoring	Long-Term Monitoring of soil and surface water at select down gradient locations every two years. Soil/surface water sampling report - every two years

Description

Details

Excavation / Soil Movement Restrictions

The site will be restricted from future uses that would affect the integrity of the cap (e.g., excavation, residential/ commercial development).

Maintenance / Inspection Of Engineering Controls

Earthen cap constructed at SS07 to cover PCB-contaminated soils and debris from a demolished electrical substation building. Placement of warning and restricted access signs will limit human access. The site will be inspected annually to ensure the integrity of the cap and the condition of warning signs. PCB Cap Inspection Tech Memo-annually

Surface water monitoring

Long-Term Monitoring of soil and surface water at select down gradient locations every two years. Soil/surface water sampling report - every two years

2022 Remedial Action Construction Report

2021 ROD Amendment

No associated sites were found.

Missing Location Data

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Alaska Department of Environmental Conservation

Site Report: Cape Newenham LRRS SS07

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

2022 Remedial Action Construction Report

2021 ROD Amendment

Missing Location Data

State of Alaska Department of Environmental Conservation