Site Report: Nikolski RRS WP007 Waste Disposal - formerly AOC 10

Site Name:	Nikolski RRS WP007 Waste Disposal - formerly AOC 10
Address:	Former Composite Building, Umnak Island, Nikolski, AK 99638
File Number:	2621.38.004
Hazard ID:	136
Status:	Cleanup Complete - Institutional Controls
Staff:	Axl LeVan, 9074512156 axl.levan@alaska.gov
Latitude:	52.972701
Longitude:	-168.854160
Horizontal Datum:	WGS84

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

Site Chronology
IC / Closure Details
Documents
Associated Sites

Problems/Comments

This is the waste disposal pit at the former composite building. It was AOC10 in the 1995 PA/SI. The area is about 110 feet long and 14-28 feet wide that has been impacted by waste POL discharged from an outfall connected to the former composite building. There is a seep at the bottom. The maximum concentrations in soil samples collected in 1995: DRO 110,000; GRO 14; barium 3,330; lead 29; (all mg/kg) and in ug/kg, benzene 30; methylene chloride 1020; TCE 110; toluene 740; ethylbenzene 710; total xylenes 310; 1,3,5-TMB 920; 1,2,4-TMB 270; 4-isopropyltoluene 770; n-butylbenzene 540; and t-butylbenzene 19. RRS operated from 1958 to 1977. All buildings and antennas demolished. Above ground POL storage tanks and POL pipeline still in place. Drum storage area and lighting vault are adjacent to airstrip. POL pipeline runs along sea coast and crosses Sheep Creek. Approximately 4,000 to 7,000 head of livestock graze on open range over much of Umnak Island. CERCLIS ID Number AK9572728644 In 1983, PCB contaminated soil was excavated and removed. Records indicate 36 drums of contaminated soil and 6 drums of transformer material. All above ground structures associated with this site were demolished in 1988. This included the composite building, transformer building and four White Alice Arrays. There are 8 IRP sites associated with the Nikolski RRS and an additional 4 AOC (Area of Concern) sites. RI/FS is scheduled for summer 2001, funding for additional work is programmed in 2005. While not listed on the NPL, investigations at Nikolski must follow CERCLA process per E.O. 12580 [e.g. CERCLA Sections 104(a), (b), and (c)(4), 113(k), 117(a), and (c), 119, and 121) with respect to releases or threatened releases where either the release is on or the sole source of the release is from any facility or vessel under the jurisdiction, custody, or control of their departments. These functions must be exercised consistent with CERCLA Section 120 Federal Facilities. State laws. -- State laws concerning removal and remedial action, including State laws regarding enforcement, shall apply to removal and remedial action at facilities owned or operated by a department, agency, or instrumentality of the United States when such facilities are not included on the National Priorities List. The preceding sentence shall not apply to the extent a State law would apply any standard or requirement to such facilities which is more stringent than the standards and requirements applicable to facilities which are not owned or operated by any such department, agency, or instrumentality].

Action Information

Action Date	Action	Description	DEC Staff
1/1/1994	Preliminary Assessment Approved	CH2MHill was contracted by the USACE to conduct a PA for the Nikolski White Alice Communication System Site. In 1984, the USAF removed PCB soil and transformers. In 1988 the facility was demolished and the debris and asbestos buried in an on-site landfill.	Debra Caillouet
11/1/1995	CERCLA SI	EMCON was contracted by the USAF 611th to perform a PA/SI. This area is located on the east side of High Hill & is approximately 110’ long, 14 to 28’ in width, & has a vertical drop of approximately 20’. The soil is stained black. Depth of the impacted soil is unknown. At the bottom of the soil impacted zone is a seep. Water from the seep has a sheen & flows along the inside of the gravel road for approximately 100 feet until the water infiltrates into the soil. Soil samples 95NIK021SO, 95NIK022SO (split), & 95NIK023SO (duplicate), were collected from near the suspected discharge point. TRPH values range from 160,000 to 170,000 ppm. GRO ranged from 12.8 to 13.8 ppm. DRO ranged from 95,000 to 110,000 ppm. PCBs were ND for all three samples. For the 8 RCRA metals, the following were detected: arsenic at 9.2 to 28 ppm, barium at 2,560 to 3,300 ppm, cadmium at 11 to 16 ppm, chromium at 117 to 154 ppm, lead at 700 & 1,206 ppm, mercury at 0.4 to 0.77 ppm, selenium at ND to 1.0 ppm, & silver at 17 to 29 ppm. The following VOCs were detected: acetone at ND to 5.19 ppm, methylene chloride at ND to 1.02 ppm [18 AAC 75 Table B1 2015 MTGW 0.016 mg/kg), benzene at ND to a 0.03 ppm [18 AAC 75 2015 MTGW 0.025 mg/kg], TCE at 0.05 to 0.11 ppm [18 AAC 75 2015 Table B1 MTGW 0.020 mg/kg], toluene at ND to 0.74 ppm, ethylbenzene at ND to 0.71 ppm, total xylenes at 0.17 to 0.31 ppm, 1,3,5-trimethylbenzene (TMB) at ND to 0.92, 1,2,4-TMB ND to 0.27, 4-Isopropyltoluene at ND to 0.77 ppm, n-butylbenzene at ND to 0.54 ppm, & t-butylbenzene at ND to 0.019 ppm. Acetone was also found in the method blank & is considered a lab contaminant. SVOC levels were detected up to 1,400 ppm. 2-methylnaphthalene 430 ppm (18 AAC 75 MTGW 6.1 mg/kg & Direct Contact 280 mg/kg), Acenaphthene 420 ppm (18 AAC 75 2015 MTGW 180 mg/kg), Benzo(a)anthracene 1,400 ppm [18 AAC 75 2015 MTGW 3.6 mg/kg, Direct Contact 4.9 mg/kg), benzo(a)pyrene 69 ppm [18 AAC 75 2015 MTGW 2.1 mg/kg, Direct Contact 0.49 mg/kg], Benzo(b)fluoranthene 1,400 ppm [18 AAC 75 2015 MTGW 12 mg/kg, Direct Contact 4.9 mg/kg], Benzo(k)fluoranthene 1,200 mg/kg [18 AAC 75 2015 MTGW 120 mg/kg, Direct Contact 49 mg/kg], Chrysene 1,400 ppm [18 AAC 75 2015 MTGW 360 mg/kg, Direct Contact 490 mg/kg], Indeno(1,2,3-c,d)pyrene 880 ppm [18 AAC 75 2015 MTGW 41 mg/kg, Direct Contact 4.9 mg/kg] all from a Split of 95NIK021SO. The maximum SVOC level detected by the project laboratory was 270,000 mg/mg (pyrene). Additional investigation & removal action is recommended. TRPH & DRO analytical results were above ADEC's least stringent guidelines in the outfall area for non-UST contaminated soil (Interim Guidance for Non-UST Contaminated Soil Cleanup Levels, July 17, 1991). Removal of the obviously impacted soil, approximately 21’ wide, 110’ long & 1’ in depth (about 85 cy) is recommended. The actual depth is unknown, but suspected to be shallow since it is located on the side of a rock outcrop. Surface water from a seep near the bottom of the outfall area appears to be impacted & infiltrates into the soil along the inside of the road. There is potential for soil & GW impact downgradient from this source. Water from the seep should be collected & analyzed for TRPH, DRO, & metals. Surface water downgradient from this area should also be analyzed. Lead analysis of the soil for RCRA TCLP is recommended. Based on results of the investigation & removal action, risk-based cleanup levels may be applicable. See site file for additional information.	Debra Caillouet
2/12/1997	Update or Other Action	(Old R:Base Action Code = SI - Site Investigation). SI action added by Shannon and Wilson, Inc., based on Air Force Relative Risk Evaluation Worksheet dated 9/14/95. No other information available.	S&W-Miner
12/1/2000	Update or Other Action	A site survey was conducted with the 611th, Jacobs Engineering and Jeff Brownlee (ADEC).	Debra Caillouet
12/21/2000	Meeting or Teleconference Held	Scoping meeting for the remedial investigation at this former White Alice site. The site operated on Umnak Island in the Aleutian Islands from 1957 to 1977. All the facilities except a tank farm and pipeline were demolished and buried on site in 1986. A Preliminary Assessment/Site Investigation was done in 1995. A drum removal was performed in 1997. Ten Areas of Concern and two IRP sites were identified during the PA/SI. Contaminants of concern include PCBs, petroleum, metals and TCE at one AOC.	Jeff Brownlee
2/22/2001	Meeting or Teleconference Held	Meeting was to get to know the team and goals/plans for summer 2001 work.	Debra Caillouet
4/11/2001	Site Added to Database		Former Staff
5/17/2001	Meeting or Teleconference Held	A public meeting was held in Nikolski on May 14. The Air Force, Jacobs Engineering and ADEC presented information on the cleanup process and the RI work scheduled for 6/2001. The meeting was well attended and well received by the community.	Debra Caillouet
6/25/2001	Update or Other Action	Staff traveled to Nikolski to review the characterization work being done. Work was proceeding well.	Debra Caillouet
11/29/2001	Site Characterization Report Approved	Surface soil samples collected in the central portion of the stained area contained DRO, RRO and PCB concentrations above site regulatory limits. It is recommended that this 80 cubic yards of soil be removed (given the slope of the site, it may not be possible to safely address a significant portion of the contamination) or that other alternatives be evaluated in the feasibility study.	Debra Caillouet
5/15/2002	Meeting or Teleconference Held	Staff attended a public meeting in Nikolski	Debra Caillouet
10/14/2002	Update or Other Action	Staff submitted comments on the draft feasibility study.	Debra Caillouet
12/11/2002	Meeting or Teleconference Held	Staff participated in the Air Force peer review of the proposed plan for Nikolski. In December 2002, the Air Force conducted a peer review of the draft feasibility study. The peer review team concluded that a risk assessment should be conducted at the composite building and associated White Alice arrays (OT-001), the fuel pipeline (SS-003), and the POL tank area (SS-004). Based on the conclusions of the peer review team, a preferred alternative will not be selected for OT-001, SS-003, SS-004, or the POL outfall area (WP-007) until the risk assessment is completed. Because this change significantly impacted the alternatives developed to address POL contamination, a separate alternative to address the remaining sites with POL contamination has been included in this document in order to implement the peer review team's recommendations. See site file for additional information.	Debra Caillouet
10/13/2003	Risk Assessment Workplan Approved	The Alaska Department of Environmental Conservation (ADEC) received the above mentioned report on August 21, 2003. We concur that the work plan meets the requirements of ADEC’s Risk Assessment Procedures Manual, dated June 8, 2000. Thank you for providing a copy of the Final Nikolski RRS Risk Assessment Work Plan.	Debra Caillouet
8/6/2004	Document, Report, or Work plan Review - other	Staff provided comments on the Nikolski Radio Relay Station, Nikolski, Alaska, Baseline Risk Assessment, Final, June 2004. The Alaska Department of Environmental Conservation (DEC) received the above document on July 13, 2004, has completed review and concurs with the findings as listed below. The baseline risk assessment evaluates four sites at the Nikolski RRS: Composite Building and Associated White Alice Arrays (OT-001), POL Outfall Area (WP-007), Fuel Pipeline (SS-003), and POL Tank Area (SS-004). POL Outfall Area The POL outfall area is immediately adjacent to the composite building site, and the exposure assumptions used for the composite building site are applicable to the POL outfall area. For the POL outfall area, the total human health HI was 1.2, however, hazard indices for all target organs are less than 1.0. The total cancer risk was less than 1x10-5. Again, institutional controls will be needed to ensure the exposure assumptions remain valid. Two ecological contaminants of concern were identified for the POL outfall area: sec-butyl benzene (HQ=4.0) and n-butyl benzene (HQ=9.0). No action is recommended to address these two contaminants because of the low frequency of detection (1 of 15 and 2 of 15), one of the detections for n-butyl benzene was deeper than the masked shrew is known to burrow. Therefore, potential exposure is unlikely. And both n-butyl benzene and sec-butylbenzene are essentially immobile in the environment. For these reasons DEC concurs with the risk assessment conclusions.	Louis Howard
1/18/2005	Update or Other Action	File number issued 2621.38.004	Aggie Blandford
2/20/2007	Document, Report, or Work plan Review - other	Staff provided comments on the draft proposed plan for six sites. When we met with you and BEM on February 9, 2007, BEM provided drafts of proposed plans for several sites at the Nikolski RRS. WP007 Composite Building POL Outfall 1) In the Site Background Section, the third paragraph, please change the description of the source. Common practice during the operation of the facility was to discharge wastes through facility drains and may have included used motor oil, lubricants, industrial degreasers, cleaning solvents, and transformer oils. 2) Site Characteristics, the Remedial Investigation did not make any recommendation for contaminants to be carried through to a Risk Assessment. The Risk Assessment in Tables 3-3 and 3-4 lists many more Contaminants of Potential Concern that were evaluated. This section should be updated to include all CPOCs that were evaluated in the risk assessment. 3) The Human Health Risk Assessment shows a Hazard Index of 1.22 for human health, this is greater than the standard of 1. Please revise this section to include this value. 4) Proposed Actions. DEC does not agree with the proposed "no action is required to remediate contamination". a. 18 AAC 75.325 requires that the responsible person perform a cleanup of surface soil staining and that free product be removed to minimize the spread of contamination and avoid additional discharge. The RI in Section 6.12 states that soil at the top center of this section is stained black. POL contamination is visible near the bottom center of this section where water seeps out. The free product must be addressed as well as the stained area. b. 18 AAC 75.340G) states that the maximum allowable concentration in Table B2of18 AAC 75.341 must be attained in the surface soil and the subsurface soil. These levels are 12,500 mg/kg for DRO and 22,000 mg/kg for RRO. The RI found DRO up to 80,000 mg/kg and RRO up to 54,100 mg/kg. These values are considerably above the maximum allowable concentrations and must be cleaned up.	Louis Howard
3/9/2007	Document, Report, or Work plan Review - other	ADEC submitted formal comments on the Proposed Plan for Site WP007, Composite Building Outfall published by the Air Force The Proposed Plan does not present the remedial alternatives that were analyzed for the site. Contamination is present that requires the use of Institutional Controls or Land Use Controls. A No Action Decision is not appropriate. Contamination is present that exceeds standards identified in the Alaska Administrative Code, Chapter 18 Article 3. This is an Applicable Relevant and Appropriate Requirement (ARAR) as identified in the Remedial Investigation and the Feasibility Study. 18 AAC 75.325 requires that the responsible person perform a cleanup of surface soil staining and that free product be removed to minimize the spread of contamination and avoid additional discharge. The RI in Section 6.12 states that soil at the top center of this section is stained black. POL contamination is visible near the bottom center of this section where water seeps out. The petroleum stained soil and any free product must be addressed. 18 AAC 75.340(j) states that the maximum allowable concentration in Table B2 of 18 AAC 75.341 must be attained in the surface soil and the subsurface soil. These levels are 12,500 mg/kg for DRO and 22,000 mg/kg for RRO. The RI found DRO up to 80,000 mg/kg and RRO up to 54,100 mg/kg. Although a risk assessment has been conducted, these values are considerably above the maximum allowable concentrations and document the presence of significant NAPL (free product) that must be cleaned up. Failure to contain or cleanup this contamination is considered an on-going release, as defined in AS 46.09.900(6). Petroleum contamination remaining at site WP007 is constitutes pollution and, due to the high concentration of DRO (up to 80,000 mg/kg), it is considered an on-going release. The department requests the Air Force develop and implement a plan to cleanup the release. See site file for additional information.	Debra Caillouet
3/9/2007	Exposure Tracking Model Ranking		Debra Caillouet
5/10/2007	Update or Other Action	Thank you for providing the draft CERCLA Decision Documents for the Environmental Restoration Program Sites WP007, SS010, SS005, ST017, OT001, and ST018 at the Nikolski Radio Relay Station. The Alaska Department of Environmental Conservation is deferring comment on these documents pending completion of the public comment period, consideration of all comments received and resolution on land transfer and “affected landowner” issues. These issues are critical to the remedy selection. Please forward copies of all comments that are received on the Proposed Plan for department consideration.	Louis Howard
5/21/2007	Document, Report, or Work plan Review - other	Lawyers on behalf of the Chaluka Corp. submitted comments on the Proposed Plans for Nikolski, Alaska. Of the six Proposed Plans (PPs) issued by the Air Force (AF), four involve land to be conveyed to Chaluka pursuant to special legislation enacted by the United States Congress in 2003 (hereinafter "Airport Legislation"). In three of those four PPs, the AF proposes to place restrictions on the use of the land. The bulk of Chaluka' s comments are directed to these three PPs (Site SSO1O, Site WP007, & Site OTOO1). Chaluka would submit further that not only is there no authority for such restrictions, but that ANCSA, in fact, prohibits such restrictions. In sum, placing restrictions on the use of the land is antithetical to ANCSA's requirement that land be conveyed in "fee simple." As a justification for its intent to place use restrictions on the Phase II lands, the AF apparently relies on the language in Section 190(c)(l)(B) of the Airport Legislation. As stated above, that section provides that the Phase II lands shall be conveyed to Chaluka "upon completion of environmental restoration ... in accordance with applicable law." The AF apparently holds that "applicable law" allows it to take into consideration the "current & future land use" in determining the necessary level of "environmental restoration." This argument elevates the general & ambiguous reference to "applicable law" over the specific & plain statement that conveyance under the Airport Legislation "shall be considered to be conveyances under the Alaska Native Claims Settlement Act .... " The AF PP suffer from the additional problem that Chaluka has already carried out the obligations required of it by the statute. Chaluka has already relinquished the Exchange Lands & has received patent to the Phase I lands under the Airport Legislation. These acts cannot be undone without running further afoul of the Airport Legislation. In effect, Chaluka has carried out its side of the bargain, it should not now be forced to accept something less than was originally promised it. For all of the above reasons, Chaluka objects to the AF PP regarding Site SSO1O, Site WP007, & Site OTOO1. Chaluka submits that those lands should be restored to a condition in which they can be conveyed without restriction pursuant to "applicable law." Anything less is contrary to Congress's clear mandate as expressed in the Airport Legislation. In addition to the above comments, Chaluka concurs with & incorporates by reference the Alaska Department of Environmental Conservation's objections to the PPs regarding Site SSO1O, Site WP007, & Site OTOO1. As for the PPs for ST018 & SS005, based on the AF's assurance that no use restrictions will be placed on those sites & based on its proposed actions for Site STO18, Chaluka offers no additional comment on those plans. See site file for additional information.	Louis Howard
2/14/2011	Document, Report, or Work plan Review - other	Staff provided comments on the draft ROD (Version 2). 2.4 WP-007, IC’s do not prevent the migration to groundwater. They will prevent the movement of soil to other areas where the migration to groundwater pathway is complete. The other goals are based on residential land use and this needs to be stated. 2.12.2 Explain how the AF will enforce the ICs to prevent residential use and restrict surface excavation. Also explain how the AF will prohibit residential use and occupancy in excess of 33 days per year. 2nd para. after bullets, The ICs established by CERCLA at WP-007 will remain in effect until the COCs at WP-007 are below applicable 18 AAC 75 cleanup levels and DEC approval. In addition CERCLA will require five-year reviews as long as hazardous substances… Explicitly state how often the periodic monitoring reports will be sent to ADEC. 2.12.4 Change the 4th sentence to: However, the selected remedy of ICs will limit human exposure to contaminants at sites OT-001 and WP-007 and promote protection of human health… and what will be in the survey and where will the document be recorded. See site file for additional information.	Debra Caillouet
9/30/2011	Cleanup Complete Determination Issued	John Halverson (ADEC) Signed the Record of Decision which by signing this declaration, ADEC concurs that proper implementation of the selected remedies for ST-018, WP-007, and OT-001 will comply with state environmental laws. These decisions will be reviewed and may be modified in the future if information becomes available that indicates the presence of contaminants or exposures that may cause unacceptable risk to human health or the environment. The response action selected in this ROD is necessary to protect the public health or welfare or the environment from actual or threatened releases of hazardous substances into the environment. The COC is polychlorinated biphenyls (PCB) which has been detected at this site above 18 AAC 75 soil cleanup levels. Due to commingling of PCBs with diesel-range organics (DRO) and residual-range organics (RRO), these petroleum contaminants are included as CERCLA COCs at WP-007 only.	John Halverson
9/30/2011	Institutional Control Record Established	Institutional Controls (ICs) established & entered into the database. Areas within Site WP-007 cannot support unlimited use & unrestricted exposure due to hazardous substances remaining in place after implementation of the selected remedy. Land use restrictions are required as part of this response action & will be achieved through the establishment of ICs that limit the use of those areas of the site that have contamination remaining in place. Remedial alternatives for the Composite Building POL Outfall (WP-007) were developed & evaluated during the Feasibility Study (USAF 2003a). Based on the results of the Feasibility Study, USAF selected ICs as the preferred alternative for WP-007. The ICs will reduce human or environmental exposure to contamination, & prevent activities that may result in increased exposure or spread the extent of contamination. Major components of the CERCLA-selected remedy for WP-007 will include: • ICs to prevent residential use & restrict surface excavation activities at the site. The ICs will be developed to encompass an area described as Tract 37C covering approximately 29.64 acres (Figure B-1 in Appendix B). • Prohibiting residential use & occupancy within Tract 37C in excess of 33 days per year by any one individual (40 CFR 761.3). • The requirement that all surface excavation or digging activities within Tract 37C be subject to ADEC approval as required by State of Alaska regulations [e.g., 18 AAC 75.325(i)]. • USAF will conduct five-year reviews of the remedy as required by CERCLA Section 121(c) since hazardous substances will remain onsite at levels above applicable State of Alaska cleanup levels in 18 AAC 75. These five-year reviews will also report on the effectiveness of the ICs. Reviews may become more frequent if conditions change. The ICs will remain in effect indefinitely or until such time as the COCs at WP-007 are below applicable 18 AAC 75 cleanup levels (Table 1-1). USAF, as the responsible entity, will implement, monitor, & maintain the ICs in accordance with CERCLA & NCP regulations. USAF will also provide periodic monitoring reports to ADEC as part of five-year reviews. If the site remedy is found to be deficient during an inspection, ADEC will be contacted & further corrective action will be planned. ADEC will be notified if the property subject to ICs is transferred or if any significant changes are made to the use & activity restrictions of the ICs. There are currently no tenants, contractors, or occupants within the property subjected to ICs. Table 1-1 presents the CERCLA COCs present at OT-001 & WP-007. See site file for additional information.	Louis Howard
9/30/2011	CERCLA ROD Approved	The response action selected in this ROD is necessary to protect the public health or welfare or the environment from actual or threatened releases of hazardous substances into the environment. The COC is PCBs which is above 18 AAC 75 soil cleanup levels. Due to commingling of PCBs with DRO & RRO, these petroleum contaminants are included as CERCLA COCs at WP-007 only. Areas within Site WP-007 cannot support unlimited use & unrestricted exposure due to hazardous substances remaining in place after implementation of the selected remedy. Land use restrictions are required as part of this response action & will be achieved through the establishment of ICs that limit the use of those areas that have contamination remaining in place. Remedial alternatives were developed & evaluated during the Feasibility Study. Based on the results of the Feasibility Study, USAF selected ICs as the preferred alternative for WP-007. The CERCLA-selected remedy for WP-007 is ICs given that PCBs are commingled with DRO & RRO, will remain onsite above 18 AAC 75 soil cleanup levels. The ICs will reduce human or environmental exposure to contamination, & prevent activities that may result in increased exposure or spread the extent of contamination. Major components of the CERCLA-selected remedy for WP-007 will include: • ICs to prevent residential use & restrict surface excavation activities at the site. The ICs will be developed to encompass an area described as Tract 37C covering approximately 29.64 acres (Figure B-1 in Appendix B). • Prohibiting residential use & occupancy within Tract 37C in excess of 33 days per year by any one individual (40 CFR 761.3). • The requirement that all surface excavation or digging activities within Tract 37C be subject to ADEC approval as required by State of Alaska regulations [e.g., 18 AAC 75.325(i)]. • USAF will conduct five-year reviews of the remedy as required by CERCLA Section 121(c) since PCBs will remain onsite at levels above applicable State of AK cleanup levels in 18 AAC 75. These five-year reviews will also report on the effectiveness of the ICs. Reviews may become more frequent if conditions change. The ICs will remain in effect indefinitely or until such time as the COCs at WP-007 are below applicable 18 AAC 75 cleanup levels (Table 1-1). USAF, as the responsible entity, will implement, monitor, & maintain the ICs in accordance with CERCLA & NCP regulations. USAF will also provide periodic monitoring reports to ADEC as part of five-year reviews. If the site remedy is found to be deficient during an inspection, ADEC will be contacted & further corrective action will be planned. ADEC will be notified if the property subject to ICs is transferred or if any significant changes are made to the use & activity restrictions of the ICs. There are currently no tenants, contractors, or occupants within the property subjected to ICs. Table 1-1 presents the CERCLA COCs present at OT-001 & WP-007.	Debra Caillouet
11/30/2015	Meeting or Teleconference Held	Meeting with MWH scoping CERCLA 5 year review for this site. ICs for this site require limiting occupancy to 33 days per year, dig restrictions, and 5 year reviews of protectiveness. Recommended consultation with stakeholders, review of ROD, and preparation/update of LUC-IC management plan and report. Referred to PM to attach ROD and establish Interim ICs in ADEC Database.	Fred Vreeman
8/26/2016	Update or Other Action	Draft 5 Year Review for LF001, OT001, ST017, TU019, WP007 received for review and comment. The site inspection identified stained soil at WP007 and protruding debris at Sites LF001, OT001, TU019, and WP007. Recommendation and follow-up action: Soil staining and protruding debris should be evaluated during annual site inspections to determine if sampling or repairs are required. LF001 Warning sign at Site LF001 has blown over and is lying on the ground. Recommendation: Repair warning signage to restore integrity of the Site LF001 LUCs The 2013 ROD incorrectly listed excavation as a component of the Site LF001 remedy. Recommendation: Issue a ROD Amendment to clarify that the Site LF001 remedy is LUCs and soil excavation is not required. There are no immediate threats from the five sites at Nikolski RRS. The remedies for Sites OT001, TU019, ST017, and WP007 are being implemented in accordance with their respective RODs. Long-term, the remedies are protective for the following reasons: • ICs are in place at Sites OT001, TU019, ST017, and WP007 to limit potential exposures to onsite contaminants; and • LTM is performed at Site ST017 to monitor TCE concentrations in the seep area downgradient of the site. The USAF certifies that the remedies for Sites OT001, TU019, ST017, and WP007 at Nikolski RRS are protective of human health and the environment and comply with Federal and State requirements that are legally applicable or relevant and appropriate. The remedy for Site LF001 was selected in accordance with State laws and regulations, as no CERCLA COCs were identified as being released to the environment at the site. The results of this FYR indicate that the Site LF001 remedy is neither currently protective nor protective in the future based on documented deficiencies in the LUCs. Annual inspections are performed at Site LF001, in accordance with the ROD. However, additional action is required to restore the integrity of the Site LF001 LUCs. See site file for additional information.	Louis Howard
10/12/2016	Document, Report, or Work plan Review - other	Five Year review received for review and comment. Staff requested that confirmation be determined on whether or not a Notice of Environmental Contamination was filed with ADNR's land records. Update: As of August 2019, no final version of the Five Year Review has been received for LF001, OT001, ST017, TU019 and WP007 sites since October 12, 2016 comments on draft.	Louis Howard
5/9/2019	Document, Report, or Work plan Review - other	Work plan addendum for 2019 Remedial Action Operations, Land Use/Institutional Control Former Nikolski Radio Relay Station Sites LF001, OT001, OT010, SA593, SS003, SS004, ST017, TU019, and WP007 approved by ADEC.	Louis Howard
9/8/2020	Update or Other Action	DEC approved the "Final Supplemental Work Plan, 2020 Remedial Action Operations, Land Use/Institutional Control, Former Nikolski Radio Relay Station, Alasak, Sites LF001, OT001, SA593, SS003, SS004, TU019, and WP007” dated September 2020. This work plan addresses inspection of the institutional controls/land use controls, as well as groundwater, surface water, pore water, soil, and sediment sampling activities associated with long term monitoring (LTM) at the Former Nikolski Radio Relay Station Sites LF001, OT001, SA593, SS003, SS004, TU019, and WP007, located in Nikolski, Alaska.	Melinda Brunner
6/1/2021	Document, Report, or Work plan Review - other	Staff provided comments on the 2021 Draft Final Uniform Federal Policy for Quality Assurance Project Plan for Long-Term Management and Remedial Action Operations Activities, Nikolski Radio Relay Station, Alaska, March 2021. The Work Plan described the approach and procedures for site-specific long-term management and remedial action-operation activities at Nikolski Radio Relay Station sites, including annual groundwater sampling for site SS004. The Work Plan covers work being performed over a 5-year period.	Axl LeVan
6/24/2021	Document, Report, or Work plan Review - other	DEC reviewed and provided comments on the "2020 Remedial Action operations, Institutional Control/Land Use Control Report, Nikolski RRS, Alaska, May 2021", received on May 26, 2021. The report presented the results of the 2020 Long Term Maintenance (LTM) performed at the Former Nikolski Radio Relay Station sites LF001, OT001, SA593 (also known as SS006), SS003, SS004, TU019, and WP007. The site visit was conducted in September of 2020 and included groundwater sampling at Site SS004.	Axl LeVan
8/17/2021	Document, Report, or Work plan Review - other	DEC approved the "Final 2020 Remedial Action operations, Institutional Control/Land Use Control Report, Nikolski RRS, Alaska, August 2021", received on August 17, 2021. The report presented the results of the 2020 Long Term Maintenance (LTM) performed at the Former Nikolski Radio Relay Station sites LF001, OT001, SA593 (also known as SS006), SS003, SS004, TU019, and WP007. The site visit was conducted in September of 2020 and included groundwater sampling at Site SS004.	Axl LeVan
8/20/2021	Document, Report, or Work plan Review - other	Staff approved the 2021 Final Uniform Federal Policy for Quality Assurance Project Plan for Long-Term Management and Remedial Action Operations Activities, Nikolski Radio Relay Station, Alaska, August 2021. The Work Plan described the approach and procedures for site-specific long-term management and remedial action-operation activities at Nikolski Radio Relay Station sites, including annual groundwater sampling for site SS004. The Work Plan covers work being performed over a 5-year period.	Axl LeVan
4/7/2022	CERCLA ROD Periodic Review	DEC reviewed and provided comments on the "Draft Second Five-Year Review for CERCLA SITES WP007 and ST017 and Non-CERCLA Sites LF001, OT001 (incl TU019), Nikolski Radio Relay Station, Alaska, March 2022", received on March 7, 2022. This Five-Year Review (FYR) evaluated whether the remedy at a site is protective of human health and the environment. The methods, findings, and conclusions of reviews are documented in the FYR report. Based on review of the report and the first five year review DEC provided comments regarding the current protectiveness statement and the need for a Notice of Activity and Use Limitations (NAULs) in accordance with Chapter 46.04, Article 3 of the Alaska Statutes Uniform Environmental Covenants Act (UECA).	Axl LeVan
5/17/2022	Document, Report, or Work plan Review - other	The Alaska Department of Environmental Conservation (DEC) reviewed and approved the "Final Second Five-Year Review for CERCLA SITES WP007 and ST017 and Non-CERCLA Sites LF001, OT001 (incl TU019), Nikolski Radio Relay Station, Alaska, April 2022" received on May 2, 2022. This Five-Year Review (FYR) evaluates whether the remedy at a site is protective of human health and the environment. The methods, findings, and conclusions of reviews are documented in the FYR report. DEC notes that a timeline for providing a ROD amendment for LF001 was not included in the document and should be completed before the next FYR. Site ST017 will no longer be included in future FYRs as the site has reach cleanup complete status.	Axl LeVan
7/21/2022	Document, Report, or Work plan Review - other	The Alaska Department of Environmental Conservation (DEC) Contaminated Sites Program received a copy of the Draft-Final 2021 Land use/Institutional Controls and Long-Term Management Report, Nikolski Long Range Radar Site, June 2022 on June 27, 2022. This report presents the results of the 2021 Long-Term Monitoring (LTM) performed at the Former Nikolski Radio Relay Station Sites LF001, OT001, SA593, SS003, SS004, SS010, TU019, and WP007. This work was performed October 15 through 18, 2021 and included institution control (IC) and land use control (LUC) inspections. Groundwater sampling also occurred at site SS004.	Axl LeVan
9/7/2022	Document, Report, or Work plan Review - other	The Alaska Department of Environmental Conservation (DEC) Contaminated Sites Program approved the Final 2021 Land use/Institutional Controls and Long-Term Management Report, Nikolski Long Range Radar Site, August 2022 on August 26, 2022. This report presents the results of the 2021 Long-Term Monitoring (LTM) performed at the Former Nikolski Radio Relay Station Sites LF001, OT001, SA593, SS003, SS004, SS010, TU019, and WP007. This work was performed October 15 through 18, 2021 and included institution control (IC) and land use control (LUC) inspections. Groundwater sampling also occurred at site SS004.	Axl LeVan
2/8/2024	Document, Report, or Work plan Review - other	DEC reviewed and approved the "Draft-Final 2022 Land Use/Institutional Controls and Long-Term Management Report, Nikolski Long Range Radar Site, January 2024". The remaining DEC comment was addressed by the most recent update to the document.	Axl LeVan

Action Date

Action

Description

DEC Staff

1/1/1994

Preliminary Assessment Approved

CH2MHill was contracted by the USACE to conduct a PA for the Nikolski White Alice Communication System Site. In 1984, the USAF removed PCB soil and transformers. In 1988 the facility was demolished and the debris and asbestos buried in an on-site landfill.

Debra Caillouet

11/1/1995

CERCLA SI

EMCON was contracted by the USAF 611th to perform a PA/SI. This area is located on the east side of High Hill & is approximately 110’ long, 14 to 28’ in width, & has a vertical drop of approximately 20’. The soil is stained black. Depth of the impacted soil is unknown. At the bottom of the soil impacted zone is a seep. Water from the seep has a sheen & flows along the inside of the gravel road for approximately 100 feet until the water infiltrates into the soil. Soil samples 95NIK021SO, 95NIK022SO (split), & 95NIK023SO (duplicate), were collected from near the suspected discharge point. TRPH values range from 160,000 to 170,000 ppm. GRO ranged from 12.8 to 13.8 ppm. DRO ranged from 95,000 to 110,000 ppm. PCBs were ND for all three samples. For the 8 RCRA metals, the following were detected: arsenic at 9.2 to 28 ppm, barium at 2,560 to 3,300 ppm, cadmium at 11 to 16 ppm, chromium at 117 to 154 ppm, lead at 700 & 1,206 ppm, mercury at 0.4 to 0.77 ppm, selenium at ND to 1.0 ppm, & silver at 17 to 29 ppm. The following VOCs were detected: acetone at ND to 5.19 ppm, methylene chloride at ND to 1.02 ppm [18 AAC 75 Table B1 2015 MTGW 0.016 mg/kg), benzene at ND to a 0.03 ppm [18 AAC 75 2015 MTGW 0.025 mg/kg], TCE at 0.05 to 0.11 ppm [18 AAC 75 2015 Table B1 MTGW 0.020 mg/kg], toluene at ND to 0.74 ppm, ethylbenzene at ND to 0.71 ppm, total xylenes at 0.17 to 0.31 ppm, 1,3,5-trimethylbenzene (TMB) at ND to 0.92, 1,2,4-TMB ND to 0.27, 4-Isopropyltoluene at ND to 0.77 ppm, n-butylbenzene at ND to 0.54 ppm, & t-butylbenzene at ND to 0.019 ppm. Acetone was also found in the method blank & is considered a lab contaminant. SVOC levels were detected up to 1,400 ppm. 2-methylnaphthalene 430 ppm (18 AAC 75 MTGW 6.1 mg/kg & Direct Contact 280 mg/kg), Acenaphthene 420 ppm (18 AAC 75 2015 MTGW 180 mg/kg), Benzo(a)anthracene 1,400 ppm [18 AAC 75 2015 MTGW 3.6 mg/kg, Direct Contact 4.9 mg/kg), benzo(a)pyrene 69 ppm [18 AAC 75 2015 MTGW 2.1 mg/kg, Direct Contact 0.49 mg/kg], Benzo(b)fluoranthene 1,400 ppm [18 AAC 75 2015 MTGW 12 mg/kg, Direct Contact 4.9 mg/kg], Benzo(k)fluoranthene 1,200 mg/kg [18 AAC 75 2015 MTGW 120 mg/kg, Direct Contact 49 mg/kg], Chrysene 1,400 ppm [18 AAC 75 2015 MTGW 360 mg/kg, Direct Contact 490 mg/kg], Indeno(1,2,3-c,d)pyrene 880 ppm [18 AAC 75 2015 MTGW 41 mg/kg, Direct Contact 4.9 mg/kg] all from a Split of 95NIK021SO. The maximum SVOC level detected by the project laboratory was 270,000 mg/mg (pyrene). Additional investigation & removal action is recommended. TRPH & DRO analytical results were above ADEC's least stringent guidelines in the outfall area for non-UST contaminated soil (Interim Guidance for Non-UST Contaminated Soil Cleanup Levels, July 17, 1991). Removal of the obviously impacted soil, approximately 21’ wide, 110’ long & 1’ in depth (about 85 cy) is recommended. The actual depth is unknown, but suspected to be shallow since it is located on the side of a rock outcrop. Surface water from a seep near the bottom of the outfall area appears to be impacted & infiltrates into the soil along the inside of the road. There is potential for soil & GW impact downgradient from this source. Water from the seep should be collected & analyzed for TRPH, DRO, & metals. Surface water downgradient from this area should also be analyzed. Lead analysis of the soil for RCRA TCLP is recommended. Based on results of the investigation & removal action, risk-based cleanup levels may be applicable. See site file for additional information.

Debra Caillouet

2/12/1997

Update or Other Action

(Old R:Base Action Code = SI - Site Investigation). SI action added by Shannon and Wilson, Inc., based on Air Force Relative Risk Evaluation Worksheet dated 9/14/95. No other information available.

S&W-Miner

12/1/2000

Update or Other Action

A site survey was conducted with the 611th, Jacobs Engineering and Jeff Brownlee (ADEC).

Debra Caillouet

12/21/2000

Meeting or Teleconference Held

Scoping meeting for the remedial investigation at this former White Alice site. The site operated on Umnak Island in the Aleutian Islands from 1957 to 1977. All the facilities except a tank farm and pipeline were demolished and buried on site in 1986. A Preliminary Assessment/Site Investigation was done in 1995. A drum removal was performed in 1997. Ten Areas of Concern and two IRP sites were identified during the PA/SI. Contaminants of concern include PCBs, petroleum, metals and TCE at one AOC.

Jeff Brownlee

2/22/2001

Meeting or Teleconference Held

Meeting was to get to know the team and goals/plans for summer 2001 work.

Debra Caillouet

4/11/2001

Site Added to Database

Former Staff

5/17/2001

Meeting or Teleconference Held

A public meeting was held in Nikolski on May 14. The Air Force, Jacobs Engineering and ADEC presented information on the cleanup process and the RI work scheduled for 6/2001. The meeting was well attended and well received by the community.

Debra Caillouet

6/25/2001

Update or Other Action

Staff traveled to Nikolski to review the characterization work being done. Work was proceeding well.

Debra Caillouet

11/29/2001

Site Characterization Report Approved

Surface soil samples collected in the central portion of the stained area contained DRO, RRO and PCB concentrations above site regulatory limits. It is recommended that this 80 cubic yards of soil be removed (given the slope of the site, it may not be possible to safely address a significant portion of the contamination) or that other alternatives be evaluated in the feasibility study.

Debra Caillouet

5/15/2002

Meeting or Teleconference Held

Staff attended a public meeting in Nikolski

Debra Caillouet

10/14/2002

Update or Other Action

Staff submitted comments on the draft feasibility study.

Debra Caillouet

12/11/2002

Meeting or Teleconference Held

Staff participated in the Air Force peer review of the proposed plan for Nikolski. In December 2002, the Air Force conducted a peer review of the draft feasibility study. The peer review team concluded that a risk assessment should be conducted at the composite building and associated White Alice arrays (OT-001), the fuel pipeline (SS-003), and the POL tank area (SS-004). Based on the conclusions of the peer review team, a preferred alternative will not be selected for OT-001, SS-003, SS-004, or the POL outfall area (WP-007) until the risk assessment is completed. Because this change significantly impacted the alternatives developed to address POL contamination, a separate alternative to address the remaining sites with POL contamination has been included in this document in order to implement the peer review team's recommendations. See site file for additional information.

Debra Caillouet

10/13/2003

Risk Assessment Workplan Approved

The Alaska Department of Environmental Conservation (ADEC) received the above mentioned report on August 21, 2003. We concur that the work plan meets the requirements of ADEC’s Risk Assessment Procedures Manual, dated June 8, 2000. Thank you for providing a copy of the Final Nikolski RRS Risk Assessment Work Plan.

Debra Caillouet

8/6/2004

Document, Report, or Work plan Review - other

Staff provided comments on the Nikolski Radio Relay Station, Nikolski, Alaska, Baseline Risk Assessment, Final, June 2004. The Alaska Department of Environmental Conservation (DEC) received the above document on July 13, 2004, has completed review and concurs with the findings as listed below. The baseline risk assessment evaluates four sites at the Nikolski RRS: Composite Building and Associated White Alice Arrays (OT-001), POL Outfall Area (WP-007), Fuel Pipeline (SS-003), and POL Tank Area (SS-004). POL Outfall Area The POL outfall area is immediately adjacent to the composite building site, and the exposure assumptions used for the composite building site are applicable to the POL outfall area. For the POL outfall area, the total human health HI was 1.2, however, hazard indices for all target organs are less than 1.0. The total cancer risk was less than 1x10-5. Again, institutional controls will be needed to ensure the exposure assumptions remain valid. Two ecological contaminants of concern were identified for the POL outfall area: sec-butyl benzene (HQ=4.0) and n-butyl benzene (HQ=9.0). No action is recommended to address these two contaminants because of the low frequency of detection (1 of 15 and 2 of 15), one of the detections for n-butyl benzene was deeper than the masked shrew is known to burrow. Therefore, potential exposure is unlikely. And both n-butyl benzene and sec-butylbenzene are essentially immobile in the environment. For these reasons DEC concurs with the risk assessment conclusions.

Louis Howard

1/18/2005

Update or Other Action

File number issued 2621.38.004

Aggie Blandford

2/20/2007

Document, Report, or Work plan Review - other

Staff provided comments on the draft proposed plan for six sites. When we met with you and BEM on February 9, 2007, BEM provided drafts of proposed plans for several sites at the Nikolski RRS. WP007 Composite Building POL Outfall 1) In the Site Background Section, the third paragraph, please change the description of the source. Common practice during the operation of the facility was to discharge wastes through facility drains and may have included used motor oil, lubricants, industrial degreasers, cleaning solvents, and transformer oils. 2) Site Characteristics, the Remedial Investigation did not make any recommendation for contaminants to be carried through to a Risk Assessment. The Risk Assessment in Tables 3-3 and 3-4 lists many more Contaminants of Potential Concern that were evaluated. This section should be updated to include all CPOCs that were evaluated in the risk assessment. 3) The Human Health Risk Assessment shows a Hazard Index of 1.22 for human health, this is greater than the standard of 1. Please revise this section to include this value. 4) Proposed Actions. DEC does not agree with the proposed "no action is required to remediate contamination". a. 18 AAC 75.325 requires that the responsible person perform a cleanup of surface soil staining and that free product be removed to minimize the spread of contamination and avoid additional discharge. The RI in Section 6.12 states that soil at the top center of this section is stained black. POL contamination is visible near the bottom center of this section where water seeps out. The free product must be addressed as well as the stained area. b. 18 AAC 75.340G) states that the maximum allowable concentration in Table B2of18 AAC 75.341 must be attained in the surface soil and the subsurface soil. These levels are 12,500 mg/kg for DRO and 22,000 mg/kg for RRO. The RI found DRO up to 80,000 mg/kg and RRO up to 54,100 mg/kg. These values are considerably above the maximum allowable concentrations and must be cleaned up.

Louis Howard

3/9/2007

Document, Report, or Work plan Review - other

ADEC submitted formal comments on the Proposed Plan for Site WP007, Composite Building Outfall published by the Air Force The Proposed Plan does not present the remedial alternatives that were analyzed for the site. Contamination is present that requires the use of Institutional Controls or Land Use Controls. A No Action Decision is not appropriate. Contamination is present that exceeds standards identified in the Alaska Administrative Code, Chapter 18 Article 3. This is an Applicable Relevant and Appropriate Requirement (ARAR) as identified in the Remedial Investigation and the Feasibility Study. 18 AAC 75.325 requires that the responsible person perform a cleanup of surface soil staining and that free product be removed to minimize the spread of contamination and avoid additional discharge. The RI in Section 6.12 states that soil at the top center of this section is stained black. POL contamination is visible near the bottom center of this section where water seeps out. The petroleum stained soil and any free product must be addressed. 18 AAC 75.340(j) states that the maximum allowable concentration in Table B2 of 18 AAC 75.341 must be attained in the surface soil and the subsurface soil. These levels are 12,500 mg/kg for DRO and 22,000 mg/kg for RRO. The RI found DRO up to 80,000 mg/kg and RRO up to 54,100 mg/kg. Although a risk assessment has been conducted, these values are considerably above the maximum allowable concentrations and document the presence of significant NAPL (free product) that must be cleaned up. Failure to contain or cleanup this contamination is considered an on-going release, as defined in AS 46.09.900(6). Petroleum contamination remaining at site WP007 is constitutes pollution and, due to the high concentration of DRO (up to 80,000 mg/kg), it is considered an on-going release. The department requests the Air Force develop and implement a plan to cleanup the release. See site file for additional information.

Debra Caillouet

3/9/2007

Exposure Tracking Model Ranking

Debra Caillouet

5/10/2007

Update or Other Action

Thank you for providing the draft CERCLA Decision Documents for the Environmental Restoration Program Sites WP007, SS010, SS005, ST017, OT001, and ST018 at the Nikolski Radio Relay Station. The Alaska Department of Environmental Conservation is deferring comment on these documents pending completion of the public comment period, consideration of all comments received and resolution on land transfer and “affected landowner” issues. These issues are critical to the remedy selection. Please forward copies of all comments that are received on the Proposed Plan for department consideration.

Louis Howard

5/21/2007

Document, Report, or Work plan Review - other

Lawyers on behalf of the Chaluka Corp. submitted comments on the Proposed Plans for Nikolski, Alaska. Of the six Proposed Plans (PPs) issued by the Air Force (AF), four involve land to be conveyed to Chaluka pursuant to special legislation enacted by the United States Congress in 2003 (hereinafter "Airport Legislation"). In three of those four PPs, the AF proposes to place restrictions on the use of the land. The bulk of Chaluka' s comments are directed to these three PPs (Site SSO1O, Site WP007, & Site OTOO1). Chaluka would submit further that not only is there no authority for such restrictions, but that ANCSA, in fact, prohibits such restrictions. In sum, placing restrictions on the use of the land is antithetical to ANCSA's requirement that land be conveyed in "fee simple." As a justification for its intent to place use restrictions on the Phase II lands, the AF apparently relies on the language in Section 190(c)(l)(B) of the Airport Legislation. As stated above, that section provides that the Phase II lands shall be conveyed to Chaluka "upon completion of environmental restoration ... in accordance with applicable law." The AF apparently holds that "applicable law" allows it to take into consideration the "current & future land use" in determining the necessary level of "environmental restoration." This argument elevates the general & ambiguous reference to "applicable law" over the specific & plain statement that conveyance under the Airport Legislation "shall be considered to be conveyances under the Alaska Native Claims Settlement Act .... " The AF PP suffer from the additional problem that Chaluka has already carried out the obligations required of it by the statute. Chaluka has already relinquished the Exchange Lands & has received patent to the Phase I lands under the Airport Legislation. These acts cannot be undone without running further afoul of the Airport Legislation. In effect, Chaluka has carried out its side of the bargain, it should not now be forced to accept something less than was originally promised it. For all of the above reasons, Chaluka objects to the AF PP regarding Site SSO1O, Site WP007, & Site OTOO1. Chaluka submits that those lands should be restored to a condition in which they can be conveyed without restriction pursuant to "applicable law." Anything less is contrary to Congress's clear mandate as expressed in the Airport Legislation. In addition to the above comments, Chaluka concurs with & incorporates by reference the Alaska Department of Environmental Conservation's objections to the PPs regarding Site SSO1O, Site WP007, & Site OTOO1. As for the PPs for ST018 & SS005, based on the AF's assurance that no use restrictions will be placed on those sites & based on its proposed actions for Site STO18, Chaluka offers no additional comment on those plans. See site file for additional information.

Louis Howard

2/14/2011

Document, Report, or Work plan Review - other

Staff provided comments on the draft ROD (Version 2). 2.4 WP-007, IC’s do not prevent the migration to groundwater. They will prevent the movement of soil to other areas where the migration to groundwater pathway is complete. The other goals are based on residential land use and this needs to be stated. 2.12.2 Explain how the AF will enforce the ICs to prevent residential use and restrict surface excavation. Also explain how the AF will prohibit residential use and occupancy in excess of 33 days per year. 2nd para. after bullets, The ICs established by CERCLA at WP-007 will remain in effect until the COCs at WP-007 are below applicable 18 AAC 75 cleanup levels and DEC approval. In addition CERCLA will require five-year reviews as long as hazardous substances… Explicitly state how often the periodic monitoring reports will be sent to ADEC. 2.12.4 Change the 4th sentence to: However, the selected remedy of ICs will limit human exposure to contaminants at sites OT-001 and WP-007 and promote protection of human health… and what will be in the survey and where will the document be recorded. See site file for additional information.

Debra Caillouet

9/30/2011

Cleanup Complete Determination Issued

John Halverson (ADEC) Signed the Record of Decision which by signing this declaration, ADEC concurs that proper implementation of the selected remedies for ST-018, WP-007, and OT-001 will comply with state environmental laws. These decisions will be reviewed and may be modified in the future if information becomes available that indicates the presence of contaminants or exposures that may cause unacceptable risk to human health or the environment. The response action selected in this ROD is necessary to protect the public health or welfare or the environment from actual or threatened releases of hazardous substances into the environment. The COC is polychlorinated biphenyls (PCB) which has been detected at this site above 18 AAC 75 soil cleanup levels. Due to commingling of PCBs with diesel-range organics (DRO) and residual-range organics (RRO), these petroleum contaminants are included as CERCLA COCs at WP-007 only.

John Halverson

9/30/2011

Institutional Control Record Established

Institutional Controls (ICs) established & entered into the database. Areas within Site WP-007 cannot support unlimited use & unrestricted exposure due to hazardous substances remaining in place after implementation of the selected remedy. Land use restrictions are required as part of this response action & will be achieved through the establishment of ICs that limit the use of those areas of the site that have contamination remaining in place. Remedial alternatives for the Composite Building POL Outfall (WP-007) were developed & evaluated during the Feasibility Study (USAF 2003a). Based on the results of the Feasibility Study, USAF selected ICs as the preferred alternative for WP-007. The ICs will reduce human or environmental exposure to contamination, & prevent activities that may result in increased exposure or spread the extent of contamination. Major components of the CERCLA-selected remedy for WP-007 will include: • ICs to prevent residential use & restrict surface excavation activities at the site. The ICs will be developed to encompass an area described as Tract 37C covering approximately 29.64 acres (Figure B-1 in Appendix B). • Prohibiting residential use & occupancy within Tract 37C in excess of 33 days per year by any one individual (40 CFR 761.3). • The requirement that all surface excavation or digging activities within Tract 37C be subject to ADEC approval as required by State of Alaska regulations [e.g., 18 AAC 75.325(i)]. • USAF will conduct five-year reviews of the remedy as required by CERCLA Section 121(c) since hazardous substances will remain onsite at levels above applicable State of Alaska cleanup levels in 18 AAC 75. These five-year reviews will also report on the effectiveness of the ICs. Reviews may become more frequent if conditions change. The ICs will remain in effect indefinitely or until such time as the COCs at WP-007 are below applicable 18 AAC 75 cleanup levels (Table 1-1). USAF, as the responsible entity, will implement, monitor, & maintain the ICs in accordance with CERCLA & NCP regulations. USAF will also provide periodic monitoring reports to ADEC as part of five-year reviews. If the site remedy is found to be deficient during an inspection, ADEC will be contacted & further corrective action will be planned. ADEC will be notified if the property subject to ICs is transferred or if any significant changes are made to the use & activity restrictions of the ICs. There are currently no tenants, contractors, or occupants within the property subjected to ICs. Table 1-1 presents the CERCLA COCs present at OT-001 & WP-007. See site file for additional information.

Louis Howard

9/30/2011

CERCLA ROD Approved

The response action selected in this ROD is necessary to protect the public health or welfare or the environment from actual or threatened releases of hazardous substances into the environment. The COC is PCBs which is above 18 AAC 75 soil cleanup levels. Due to commingling of PCBs with DRO & RRO, these petroleum contaminants are included as CERCLA COCs at WP-007 only. Areas within Site WP-007 cannot support unlimited use & unrestricted exposure due to hazardous substances remaining in place after implementation of the selected remedy. Land use restrictions are required as part of this response action & will be achieved through the establishment of ICs that limit the use of those areas that have contamination remaining in place. Remedial alternatives were developed & evaluated during the Feasibility Study. Based on the results of the Feasibility Study, USAF selected ICs as the preferred alternative for WP-007. The CERCLA-selected remedy for WP-007 is ICs given that PCBs are commingled with DRO & RRO, will remain onsite above 18 AAC 75 soil cleanup levels. The ICs will reduce human or environmental exposure to contamination, & prevent activities that may result in increased exposure or spread the extent of contamination. Major components of the CERCLA-selected remedy for WP-007 will include: • ICs to prevent residential use & restrict surface excavation activities at the site. The ICs will be developed to encompass an area described as Tract 37C covering approximately 29.64 acres (Figure B-1 in Appendix B). • Prohibiting residential use & occupancy within Tract 37C in excess of 33 days per year by any one individual (40 CFR 761.3). • The requirement that all surface excavation or digging activities within Tract 37C be subject to ADEC approval as required by State of Alaska regulations [e.g., 18 AAC 75.325(i)]. • USAF will conduct five-year reviews of the remedy as required by CERCLA Section 121(c) since PCBs will remain onsite at levels above applicable State of AK cleanup levels in 18 AAC 75. These five-year reviews will also report on the effectiveness of the ICs. Reviews may become more frequent if conditions change. The ICs will remain in effect indefinitely or until such time as the COCs at WP-007 are below applicable 18 AAC 75 cleanup levels (Table 1-1). USAF, as the responsible entity, will implement, monitor, & maintain the ICs in accordance with CERCLA & NCP regulations. USAF will also provide periodic monitoring reports to ADEC as part of five-year reviews. If the site remedy is found to be deficient during an inspection, ADEC will be contacted & further corrective action will be planned. ADEC will be notified if the property subject to ICs is transferred or if any significant changes are made to the use & activity restrictions of the ICs. There are currently no tenants, contractors, or occupants within the property subjected to ICs. Table 1-1 presents the CERCLA COCs present at OT-001 & WP-007.

Debra Caillouet

11/30/2015

Meeting or Teleconference Held

Meeting with MWH scoping CERCLA 5 year review for this site. ICs for this site require limiting occupancy to 33 days per year, dig restrictions, and 5 year reviews of protectiveness. Recommended consultation with stakeholders, review of ROD, and preparation/update of LUC-IC management plan and report. Referred to PM to attach ROD and establish Interim ICs in ADEC Database.

Fred Vreeman

8/26/2016

Update or Other Action

Draft 5 Year Review for LF001, OT001, ST017, TU019, WP007 received for review and comment. The site inspection identified stained soil at WP007 and protruding debris at Sites LF001, OT001, TU019, and WP007. Recommendation and follow-up action: Soil staining and protruding debris should be evaluated during annual site inspections to determine if sampling or repairs are required. LF001 Warning sign at Site LF001 has blown over and is lying on the ground. Recommendation: Repair warning signage to restore integrity of the Site LF001 LUCs The 2013 ROD incorrectly listed excavation as a component of the Site LF001 remedy. Recommendation: Issue a ROD Amendment to clarify that the Site LF001 remedy is LUCs and soil excavation is not required. There are no immediate threats from the five sites at Nikolski RRS. The remedies for Sites OT001, TU019, ST017, and WP007 are being implemented in accordance with their respective RODs. Long-term, the remedies are protective for the following reasons: • ICs are in place at Sites OT001, TU019, ST017, and WP007 to limit potential exposures to onsite contaminants; and • LTM is performed at Site ST017 to monitor TCE concentrations in the seep area downgradient of the site. The USAF certifies that the remedies for Sites OT001, TU019, ST017, and WP007 at Nikolski RRS are protective of human health and the environment and comply with Federal and State requirements that are legally applicable or relevant and appropriate. The remedy for Site LF001 was selected in accordance with State laws and regulations, as no CERCLA COCs were identified as being released to the environment at the site. The results of this FYR indicate that the Site LF001 remedy is neither currently protective nor protective in the future based on documented deficiencies in the LUCs. Annual inspections are performed at Site LF001, in accordance with the ROD. However, additional action is required to restore the integrity of the Site LF001 LUCs. See site file for additional information.

Louis Howard

10/12/2016

Document, Report, or Work plan Review - other

Five Year review received for review and comment. Staff requested that confirmation be determined on whether or not a Notice of Environmental Contamination was filed with ADNR's land records. Update: As of August 2019, no final version of the Five Year Review has been received for LF001, OT001, ST017, TU019 and WP007 sites since October 12, 2016 comments on draft.

Louis Howard

5/9/2019

Document, Report, or Work plan Review - other

Work plan addendum for 2019 Remedial Action Operations, Land Use/Institutional Control Former Nikolski Radio Relay Station Sites LF001, OT001, OT010, SA593, SS003, SS004, ST017, TU019, and WP007 approved by ADEC.

Louis Howard

9/8/2020

Update or Other Action

DEC approved the "Final Supplemental Work Plan, 2020 Remedial Action Operations, Land Use/Institutional Control, Former Nikolski Radio Relay Station, Alasak, Sites LF001, OT001, SA593, SS003, SS004, TU019, and WP007” dated September 2020. This work plan addresses inspection of the institutional controls/land use controls, as well as groundwater, surface water, pore water, soil, and sediment sampling activities associated with long term monitoring (LTM) at the Former Nikolski Radio Relay Station Sites LF001, OT001, SA593, SS003, SS004, TU019, and WP007, located in Nikolski, Alaska.

Melinda Brunner

6/1/2021

Document, Report, or Work plan Review - other

Staff provided comments on the 2021 Draft Final Uniform Federal Policy for Quality Assurance Project Plan for Long-Term Management and Remedial Action Operations Activities, Nikolski Radio Relay Station, Alaska, March 2021. The Work Plan described the approach and procedures for site-specific long-term management and remedial action-operation activities at Nikolski Radio Relay Station sites, including annual groundwater sampling for site SS004. The Work Plan covers work being performed over a 5-year period.

Axl LeVan

6/24/2021

Document, Report, or Work plan Review - other

DEC reviewed and provided comments on the "2020 Remedial Action operations, Institutional Control/Land Use Control Report, Nikolski RRS, Alaska, May 2021", received on May 26, 2021. The report presented the results of the 2020 Long Term Maintenance (LTM) performed at the Former Nikolski Radio Relay Station sites LF001, OT001, SA593 (also known as SS006), SS003, SS004, TU019, and WP007. The site visit was conducted in September of 2020 and included groundwater sampling at Site SS004.

Axl LeVan

8/17/2021

Document, Report, or Work plan Review - other

DEC approved the "Final 2020 Remedial Action operations, Institutional Control/Land Use Control Report, Nikolski RRS, Alaska, August 2021", received on August 17, 2021. The report presented the results of the 2020 Long Term Maintenance (LTM) performed at the Former Nikolski Radio Relay Station sites LF001, OT001, SA593 (also known as SS006), SS003, SS004, TU019, and WP007. The site visit was conducted in September of 2020 and included groundwater sampling at Site SS004.

Axl LeVan

8/20/2021

Document, Report, or Work plan Review - other

Staff approved the 2021 Final Uniform Federal Policy for Quality Assurance Project Plan for Long-Term Management and Remedial Action Operations Activities, Nikolski Radio Relay Station, Alaska, August 2021. The Work Plan described the approach and procedures for site-specific long-term management and remedial action-operation activities at Nikolski Radio Relay Station sites, including annual groundwater sampling for site SS004. The Work Plan covers work being performed over a 5-year period.

Axl LeVan

4/7/2022

CERCLA ROD Periodic Review

DEC reviewed and provided comments on the "Draft Second Five-Year Review for CERCLA SITES WP007 and ST017 and Non-CERCLA Sites LF001, OT001 (incl TU019), Nikolski Radio Relay Station, Alaska, March 2022", received on March 7, 2022. This Five-Year Review (FYR) evaluated whether the remedy at a site is protective of human health and the environment. The methods, findings, and conclusions of reviews are documented in the FYR report. Based on review of the report and the first five year review DEC provided comments regarding the current protectiveness statement and the need for a Notice of Activity and Use Limitations (NAULs) in accordance with Chapter 46.04, Article 3 of the Alaska Statutes Uniform Environmental Covenants Act (UECA).

Axl LeVan

5/17/2022

Document, Report, or Work plan Review - other

The Alaska Department of Environmental Conservation (DEC) reviewed and approved the "Final Second Five-Year Review for CERCLA SITES WP007 and ST017 and Non-CERCLA Sites LF001, OT001 (incl TU019), Nikolski Radio Relay Station, Alaska, April 2022" received on May 2, 2022. This Five-Year Review (FYR) evaluates whether the remedy at a site is protective of human health and the environment. The methods, findings, and conclusions of reviews are documented in the FYR report. DEC notes that a timeline for providing a ROD amendment for LF001 was not included in the document and should be completed before the next FYR. Site ST017 will no longer be included in future FYRs as the site has reach cleanup complete status.

Axl LeVan

7/21/2022

Document, Report, or Work plan Review - other

The Alaska Department of Environmental Conservation (DEC) Contaminated Sites Program received a copy of the Draft-Final 2021 Land use/Institutional Controls and Long-Term Management Report, Nikolski Long Range Radar Site, June 2022 on June 27, 2022. This report presents the results of the 2021 Long-Term Monitoring (LTM) performed at the Former Nikolski Radio Relay Station Sites LF001, OT001, SA593, SS003, SS004, SS010, TU019, and WP007. This work was performed October 15 through 18, 2021 and included institution control (IC) and land use control (LUC) inspections. Groundwater sampling also occurred at site SS004.

Axl LeVan

9/7/2022

Document, Report, or Work plan Review - other

The Alaska Department of Environmental Conservation (DEC) Contaminated Sites Program approved the Final 2021 Land use/Institutional Controls and Long-Term Management Report, Nikolski Long Range Radar Site, August 2022 on August 26, 2022. This report presents the results of the 2021 Long-Term Monitoring (LTM) performed at the Former Nikolski Radio Relay Station Sites LF001, OT001, SA593, SS003, SS004, SS010, TU019, and WP007. This work was performed October 15 through 18, 2021 and included institution control (IC) and land use control (LUC) inspections. Groundwater sampling also occurred at site SS004.

Axl LeVan

2/8/2024

Document, Report, or Work plan Review - other

DEC reviewed and approved the "Draft-Final 2022 Land Use/Institutional Controls and Long-Term Management Report, Nikolski Long Range Radar Site, January 2024". The remaining DEC comment was addressed by the most recent update to the document.

Axl LeVan

Contaminant Information

Name	Level Description	Media	Comments
PCBs - Total	Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation	Soil
DRO	> Human Health/Ingestion/Inhalation	Soil	110,000 mg/kg one surface soil sample from 6" - 12" below ground surface was collected at the suspected discharge point of the outfall pipe

Name

Level Description

Media

Comments

PCBs - Total

Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation

Soil

DRO

> Human Health/Ingestion/Inhalation

Soil

110,000 mg/kg one surface soil sample from 6" - 12" below ground surface was collected at the suspected discharge point of the outfall pipe

Control Type

Type

Details

Requirements

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

Description

Details

Advance approval required to transport soil or groundwater off-site.

Movement or use of contaminated material (including on site) in a manner that results in a violation of the water quality standards is prohibited (18 AAC 70)

Record of Decision

Proposed Plan

No associated sites were found.

Missing Location Data

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Site Report: Nikolski RRS WP007 Waste Disposal - formerly AOC 10

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

Record of Decision

Proposed Plan

Missing Location Data

State of Alaska Department of Environmental Conservation