Site Report: NSB Kaktovik KIC Pad

Site Name:	NSB Kaktovik KIC Pad
Address:	North of School, Kaktovik, AK 99747
File Number:	350.38.002
Hazard ID:	2327
Status:	Active
Staff:	Andrea Carlson, 9074515174 andrea.carlson@alaska.gov
Latitude:	70.128500
Longitude:	-143.620500
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

Petroleum contamination is present throughout pad at elevated levels. Large fuel storage tanks with no containment, also hundreds of drums and batteries are stored on pad. Some contamination noted along drainage ditches. The KIC Pad is located north of the school, power plant and majority of the residential area; however, three blocks incorporating several homes are located between the KIC Pad and the lagoon. The natural slope of the tundra drains storm water from the pad toward the east through the residential area and into the lagoon. It is possible that the northern portion of the KIC Pad drains into a ditch along the access road that drains to the north.

Action Information

Action Date	Action	Description	DEC Staff
3/8/1994	Site Characterization Report Approved	Staff received and reviewed Site Characterization report by VRCA/Woodward Clyde regarding site conditions associated with the Terminal Facility. Diesel contamination was noted along the gravel pad and tundra north of the farm. No explanation why tank farm itself was not assessed. VRCA/WWC recommended additional investigation/cleanup. ADEC concurs so long as a more thorough and appropriate sampling done in future efforts. (Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)).	Cindy Thomas
4/18/1994	Site Added to Database	Petroleum contamination. File # 350.38.002, Kaktovik KIC Pad.	Ben Thomas
6/20/1994	Update or Other Action	Staff sent PRP-CS Database Notification Letter to RP requesting update and more environmental information concerning contaminated site. RP received letter, but no response yet. (Old R:Base Action Code = RPL2 - Site Information Request Letter).	Jeff Peterson
1/31/2001	Site Ranked Using the AHRM	Changed Toxicity Value from 2 to 3 to reflect possible lead contamination from batteries, Population Density Value changed from 0 to 5, multiple contaminants added to reflect potential for lead leaching into drinking water supply (lagoon). The pH of any surface water is high enough to initiate leaching condition even if at low levels.	Bruce Wanstall
6/29/2005	Update or Other Action	Date of cover letter accompanying document entitled Areawide Contaminated Sites Assessment Summary Report prepared by S&W on behalf of NSB.	Keather McLoone
6/1/2006	Update or Other Action	June 2006 dated document entitled Contaminated Sites File Review, North Slope Borough Properties, Kaktovik produced by S&W on behalf of NSB.	Keather McLoone
6/20/2006	Potentially Responsible Party/State Interest Letter	PRP Letter sent to North Slope Borough (NSB) and Kaktovik Inupiat Corporation (KIC) to determine responsibility for contamination found at the KIC pad.	Shannon Oelkers
10/3/2006	Update or Other Action	Date of receipt of disc of photos taken on 9/25/2006 at KIC pad sent by Darbyshire (a Land Management and Community Planning Consultant). Photos printed and included in the hardcopy file along with disc.	Keather McLoone
10/13/2006	Update or Other Action	Received response to PRP letter. The North Slope Borough (NSB) and the Kaktovik Inupiat Corporation (KIC) have developed a cooperative agreement to remediate this site. Proposed is a four phase project: Phase 1 - Site Inventory Control. Phase 2 - Above-Ground remediation. Phase 3 - Surface and subsurface soil sampling and analysis. Phase 4 - Submittal of Corrective Action Plan (CAP). Phases are to be completed over the next two years, with the CAP submitted after the summer of 2008.	Shannon Oelkers
7/26/2007	Meeting or Teleconference Held	ADEC staff met with the NSB and their consultant to review open status village files and to propose responses to the ADEC's request for further information and characterization at this site.	Bill O'Connell
9/20/2007	Exposure Tracking Model Ranking	Site ranked using ETM	Bill O'Connell
10/24/2007	Meeting or Teleconference Held	Meeting today with the NSB and their consultant. Work is ongoing at KIC Pad with debris removal potentially occurring in Fall 2007 followed by site characterization in 2008.	Bill O'Connell
5/21/2008	Update or Other Action	Date of DEC letter regarding several reports apparently submitted in response to 2006 DEC letter. Letter provides a brief oversight of sites at that point in time.	Keather McLoone
7/25/2008	Update or Other Action	ADEC provided comments to NSB on the 2008 SAP for KIC Pad.	Bill O'Connell
7/29/2008	Site Characterization Workplan Approved	SAP for KIC approved. Surface water samples will be collected from tundra ponds surrounding the pad and analyzed for DRO/RRO and BTEX with three of the 6 samples also analyzed for PAHs. 26 test pits will be excavated to below the pad/tundra interface and up to 39 soil samples will be collected based on field screening results and analyzed for DRO/RRO and BTEX. Soil samples from the former drum/battery storage area will also be analyzed for PCBs, lead, and VOCs.	Bill O'Connell
12/8/2008	Site Characterization Report Approved	Received Kaktovik Pad Site Assessment Site Characterization Report. Surface water samples were collected and a shovel sheen test was performed at 6 areas surrounding the pad. 27 test pits were excavated to the underlying native tundra and soil samples were collected based on the results of field screening. The surface water sample SW5 exceeded AWQS with benzene detected at 354 ug/l. Benzene was also detected at 8.97 ug/l at SW6. DRO was detected in 5 of the six samples with a maximum of 18.8 mg/l at SW5. RRO and GRO were also detected at SW5 at 1.59 mg/l and 1.97 mg/l respectively. Shovel sheen tests found sheen on surface water when sediments were disturbed at SW5 and SW6. 42 soil samples were collected from the 27 test pits. Nearly all of the test pits had one or more samples that contained DRO, GRO, or BTEX above Method Two migration to groundwater cleanup levels with DRO detected up to 5,820 mg/kg, GRO up to 2,700 mg/kg, benzene up to 7.17 mg/kg, toluene up to 371 mg/kg, ethylbenzene up to 141 mg/kg and total xylenes up to 850 mg/kg. PCBs were not detected and lead was detected up to 31.0 mg/kg. Additional VOCs were detected but at concentrations below cleanup levels.	Bill O'Connell
12/9/2008	Update or Other Action	Date of ADEC letter regarding Kaktovik KIC Pad Site Characterization Report and Meeting Summary.	Keather McLoone
5/13/2010	Update or Other Action	Date of document entitled Kaktovik KIC Pad Contaminant Delineation produced by S&W on behalf of NSB.	Keather McLoone
6/2/2010	Document, Report, or Work plan Review - other	Reviewed Sampling and Analysis Plan for Kaktovik KIC Pad. The objective of this investigation is to delineate the nature and extent of contamination along the northern edge of the pad near Waldo Arms Hotel and to sample surface water pathways to evaluate potential migration pathways. Up to seven test pits will be excavated and sampled and up to three water samples will be collected.	Bill O'Connell
6/17/2011	Document, Report, or Work plan Review - other	Reviewed 2010 KIC Pad Assessment Report. Six test pits were excavated along the northern side of the property and four surface water samples were collected from nearby water bodies. 2-3 soil samples were submitted per test pit and one or more contaminants were detected in each test pit at concentrations above ADEC cleanup levels. DRO was detected up to 3,860 mg/kg at 4.5 feet bgs in test pit 3, GRO was detected up to 275 mg/kg at 6.0 feet bgs in test pit 6, and benzene was detected up to 1.92 mg/kg at 3.0 feet bgs in test pit 6. Surface water samples -001 and -002 collected from the same water body downgradient from test pit 3 contained benzene in excess of Alaska Water Quality Standards and also DRO and GRO at concentrations indicative of fuel contamination.	Bill O'Connell
12/8/2011	Meeting or Teleconference Held	Meeting today with NSB to discuss proposed 2012 activities at KIC Pad. CAP / 2012 disposal of polluted soils at landfill, landfarm remaining soils as requied. Turn area into commericial parking area for Corp, fence off playground.	Bill O'Connell
4/30/2012	Potentially Responsible Party/State Interest Letter	PRP letter sent to property owner Kaktovik Inupiat Corporation. Response received this date. No immediate action is anticipated.	Bill O'Connell
11/14/2012	Meeting or Teleconference Held	O'Connell met with NSB to discuss site status and potential future activities at the site. Pending landowner agreement and Permit for itended use.	Keather McLoone
11/22/2013	Meeting or Teleconference Held	Meeting via telephone with previous DEC PM, NSB and NSB consultant S&W to discuss remedial options for this site.	Keather McLoone
9/30/2014	Document, Report, or Work plan Review - other	Date of receipt via email of NSB Kaktovk KIC Pad Site, Draft Site Characterization Work Plan. Revised figures sent 10/6/14. Email sent on 10/6/14 indicating an approval without conditions would be sent in the mail. Letter sent on 10/13/14.	Keather McLoone
2/12/2015	Document, Report, or Work plan Review - other	Date of document entitled Kaktovik KIC Pad 2014 Site Characterization Technical Memorandum. Activities performed in 2014 include advancing 244 soil borings, collecting 302 soil samples, converting ten borings into monitoring wells. Groundwater, surface water and soil samples collocated with surface water samples have not yet been collected due to winter conditions. The tech memo makes recommendations for removal and reuse of material contaminated with less than 500 mg/kg DRO, less than 0.5 mg/kg benzene and less than 15 mg/kg BTEX as backfill. The rest of the material removed will be stockpiled for later treatment which is currently planned to be onsite thermal treatment which would be an acceptable treatment process as PCBs and chlorinated compounds are not COCs at this site.	Keather McLoone
8/27/2015	Document, Report, or Work plan Review - other	Reviewed the Kaktovik Inupiat Corporation (KIC) Pad Corrective Action Plan dated July 2015. The corrective action plan (CAP) entails excavation and stockpiling of contaminated pad material, and confirmation soil sampling in accordance with the 2010 Draft Field Sampling Guidance. Stockpiled soil will eventually be treated using a soil remediation unit (SRU). Excavated soil from clean portions of the pad will be used to backfill the excavation first, followed by purchased fill and post-treated material from the SRU (after sampling).	Joshua Barsis
9/8/2016	Update or Other Action	Complaint was made that contaminated surface water with a sheen was migrating from the KIC pad to the adjacent property (Waldo Arms Hotel). Surface water observations and samples were collected in August in response to the complaint. Surface water samples were collected from the KIC pad (16-KKIC-PadWater) and also from the surface water adjacent the hotel (Sample 16-KKIC-OffPad), and were analyzed for BTEX and PAHs. Sample 16-KKIC-OffPad, collected from adjacent the hotel, exceeded Alaska Water Quality Standards (AWQS) for TAqH, but not TAH. The sample collected from the KIC pad did not exceed AWQS for TAH or TAqH. A sheen was noted on surface water, but field staff qualified the sheen as biogenic in nature. Based on the information provided in the site visit report (dated September 1, 2016), it does not appear that the contamination from the KIC pad is migrating via overland flow toward Waldo Arms Hotel. Further excavation will be conducted at the KIC pad and additional surface water samples will be collected to obtain additional information.	Joshua Barsis
1/17/2017	Update or Other Action	Letter sent to NSB on this day detailing the current status/progress of 22 active contaminated sites, including this site.	Joshua Barsis
8/9/2017	Site Visit	ADEC inspected this site on August 9, 2017. Excavation of contaminated soil occurred at this site in 2016, as proposed in the July 2015 Kaktovik Inupiat Corporation (KIC) Pad Corrective Action Plan. Provisions to backfill the excavation were included in the July 2015 Corrective Action Plan, however large portions of the excavation were not backfilled as planned. As a result, and as observed during the inspection, a large surface water body has formed (not previously present) with an apparent petroleum sheen visible in the middle.	Joshua Barsis
11/20/2017	Update or Other Action	Letter sent on this day as a follow up to the last version of this letter, dated January 17, 2017, and as a follow up to a meeting with NSB on November 17, 2017. This letter details the current status/progress of 23 active contaminated sites, including this site.	Joshua Barsis
9/17/2018	Document, Report, or Work plan Review - other	Reviewed of the NSB Kaktovik KIC Pad Interim Removal Action Report, dated September 6, 2018. The report details site characterization and remedial action activities completed between July and December in 2015. Prior to starting the excavation, water samples were collected from one surface water body (pond 4) and from 8 of 10 porewater monitoring wells that had been installed in 2014, but were not sampled previously. Two of the wells, MW5 and MW10 could not be sampled because there was not a sufficient volume of water after purging the wells. Surface water analytical results from Pond 4 exceeded Alaska Water Quality Standards (AWQS) for Total Aromatic Hydrocarbons (TAH) and Total Aqueous Hydrocarbons (TAqH). Samples collected from Wells WM1 through MW3, MW6, MW8, and MW9 all exhibited contaminants above Table C groundwater cleanup levels (GCLs). Table C GCLs are meant to be protective of current or future water use. Although porewater is not used for drinking or showering in Kaktovik, the detected contaminants are compared to Table C GCLs to determine if the porewater is acting as a transport mechanism to surface water, as well to better determine the extent of contamination. The most contaminated well, Well MW1, exhibited concentrations of gasoline range organics (GRO) up to 55.4 mg/l, diesel range organics (DRO) up to 3.38 mg/l, benzene up to 2,490 µg/l, ethylbenzene up to 1,430 µg/l, and toluene up to 12,600 µg/l; all of which exceed Table C GCLs and AWQS criteria. Excavation was performed at Areas 1 through 4 in August 2015, and at Area 5 in November and December 2015. In total, roughly 3,000 cubic yards of contaminated material was removed and stockpiled onsite. Confirmation soil samples collected from the excavation indicate that contaminated soil remains onsite above human health cleanup levels. Report recommendations include remediating and/or disposing of the impacted stockpile of material, additional backfilling to bring the pad to grade to limit onsite surface water ponding, and semi-annual surface water and porewater monitoring. Although ADEC does not have any particular objection to the proposed actions, as is, this site is not eligible for site closure. Data gaps preventing this site from closure include: remaining impacts above human health levels, cumulative risk exceedances, and the extent of contamination has not been determined.	Joshua Barsis
11/16/2018	Update or Other Action	Letter sent on this day as a follow up to the last version of this letter, dated November 20, 2017, and at the request of the North Slope Borough (NSB). This letter details the current progress of 24 active contaminated sites, including this site.	Joshua Barsis
4/8/2019	Document, Report, or Work plan Review - other	Reviewed the April 2, 2019 NSB Kaktovik KIC Pad Supplemental Removal Action Work Plan – Draft. Proposed activities detailed in the plan generally consist of additional removal of contaminated gravel, sheen testing, and continued groundwater and surface water sampling. ADEC issued a letter on this day (April 8) indicating that the work plan needed a few more details before being approved; see file for letter.	Joshua Barsis
9/5/2019	Site Characterization Workplan Approved	The updated April 2, 2019 work plan was conditionally approved. Conditions were to collect a surface water sample from the area of sheening and to submit a notice of intent and bmp plan before backfilling.	Joshua Barsis
2/19/2020	Enforcement Action	Notice of Violation issued to NSB on February 18, 2020. See file for more information.	Joshua Barsis
6/29/2022	Enforcement Agreement or Order	A compliance order by consent (COBC) was signed by the North Slope Borough and ADEC Division of SPAR. The COBC identifies corrective actions that the NSB will take to manage cleanup waste and characterize and remediate contaminated sites and spills.	Lisa Krebs-Barsis
9/20/2023	Site Visit	DEC Staff A. Carlson and S. Joyce (PPR) conducted site visit in conjunction with NSB environmental representative on September 14, and 15, 2023. The site was inspected for waste and for compliance with the COBC.	Andrea Carlson
3/20/2024	Document, Report, or Work plan Review - other	Reviewed and approved Kaktovik KIC Pad Contaminated Soil Stockpile Sampling Plan to do waste characterization for a >3000 cy contaminated soil stockpile and determine disposal options.	Andrea Carlson

Action Date

Action

Description

DEC Staff

3/8/1994

Site Characterization Report Approved

Staff received and reviewed Site Characterization report by VRCA/Woodward Clyde regarding site conditions associated with the Terminal Facility. Diesel contamination was noted along the gravel pad and tundra north of the farm. No explanation why tank farm itself was not assessed. VRCA/WWC recommended additional investigation/cleanup. ADEC concurs so long as a more thorough and appropriate sampling done in future efforts. (Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)).

Cindy Thomas

4/18/1994

Site Added to Database

Petroleum contamination. File # 350.38.002, Kaktovik KIC Pad.

Ben Thomas

6/20/1994

Update or Other Action

Staff sent PRP-CS Database Notification Letter to RP requesting update and more environmental information concerning contaminated site. RP received letter, but no response yet. (Old R:Base Action Code = RPL2 - Site Information Request Letter).

Jeff Peterson

1/31/2001

Site Ranked Using the AHRM

Changed Toxicity Value from 2 to 3 to reflect possible lead contamination from batteries, Population Density Value changed from 0 to 5, multiple contaminants added to reflect potential for lead leaching into drinking water supply (lagoon). The pH of any surface water is high enough to initiate leaching condition even if at low levels.

Bruce Wanstall

6/29/2005

Update or Other Action

Date of cover letter accompanying document entitled Areawide Contaminated Sites Assessment Summary Report prepared by S&W on behalf of NSB.

Keather McLoone

6/1/2006

Update or Other Action

June 2006 dated document entitled Contaminated Sites File Review, North Slope Borough Properties, Kaktovik produced by S&W on behalf of NSB.

Keather McLoone

6/20/2006

Potentially Responsible Party/State Interest Letter

PRP Letter sent to North Slope Borough (NSB) and Kaktovik Inupiat Corporation (KIC) to determine responsibility for contamination found at the KIC pad.

Shannon Oelkers

10/3/2006

Update or Other Action

Date of receipt of disc of photos taken on 9/25/2006 at KIC pad sent by Darbyshire (a Land Management and Community Planning Consultant). Photos printed and included in the hardcopy file along with disc.

Keather McLoone

10/13/2006

Update or Other Action

Received response to PRP letter. The North Slope Borough (NSB) and the Kaktovik Inupiat Corporation (KIC) have developed a cooperative agreement to remediate this site. Proposed is a four phase project: Phase 1 - Site Inventory Control. Phase 2 - Above-Ground remediation. Phase 3 - Surface and subsurface soil sampling and analysis. Phase 4 - Submittal of Corrective Action Plan (CAP). Phases are to be completed over the next two years, with the CAP submitted after the summer of 2008.

Shannon Oelkers

7/26/2007

Meeting or Teleconference Held

ADEC staff met with the NSB and their consultant to review open status village files and to propose responses to the ADEC's request for further information and characterization at this site.

Bill O'Connell

9/20/2007

Exposure Tracking Model Ranking

Site ranked using ETM

Bill O'Connell

10/24/2007

Meeting or Teleconference Held

Meeting today with the NSB and their consultant. Work is ongoing at KIC Pad with debris removal potentially occurring in Fall 2007 followed by site characterization in 2008.

Bill O'Connell

5/21/2008

Update or Other Action

Date of DEC letter regarding several reports apparently submitted in response to 2006 DEC letter. Letter provides a brief oversight of sites at that point in time.

Keather McLoone

7/25/2008

Update or Other Action

ADEC provided comments to NSB on the 2008 SAP for KIC Pad.

Bill O'Connell

7/29/2008

Site Characterization Workplan Approved

SAP for KIC approved. Surface water samples will be collected from tundra ponds surrounding the pad and analyzed for DRO/RRO and BTEX with three of the 6 samples also analyzed for PAHs. 26 test pits will be excavated to below the pad/tundra interface and up to 39 soil samples will be collected based on field screening results and analyzed for DRO/RRO and BTEX. Soil samples from the former drum/battery storage area will also be analyzed for PCBs, lead, and VOCs.

Bill O'Connell

12/8/2008

Site Characterization Report Approved

Received Kaktovik Pad Site Assessment Site Characterization Report. Surface water samples were collected and a shovel sheen test was performed at 6 areas surrounding the pad. 27 test pits were excavated to the underlying native tundra and soil samples were collected based on the results of field screening. The surface water sample SW5 exceeded AWQS with benzene detected at 354 ug/l. Benzene was also detected at 8.97 ug/l at SW6. DRO was detected in 5 of the six samples with a maximum of 18.8 mg/l at SW5. RRO and GRO were also detected at SW5 at 1.59 mg/l and 1.97 mg/l respectively. Shovel sheen tests found sheen on surface water when sediments were disturbed at SW5 and SW6. 42 soil samples were collected from the 27 test pits. Nearly all of the test pits had one or more samples that contained DRO, GRO, or BTEX above Method Two migration to groundwater cleanup levels with DRO detected up to 5,820 mg/kg, GRO up to 2,700 mg/kg, benzene up to 7.17 mg/kg, toluene up to 371 mg/kg, ethylbenzene up to 141 mg/kg and total xylenes up to 850 mg/kg. PCBs were not detected and lead was detected up to 31.0 mg/kg. Additional VOCs were detected but at concentrations below cleanup levels.

Bill O'Connell

12/9/2008

Update or Other Action

Date of ADEC letter regarding Kaktovik KIC Pad Site Characterization Report and Meeting Summary.

Keather McLoone

5/13/2010

Update or Other Action

Date of document entitled Kaktovik KIC Pad Contaminant Delineation produced by S&W on behalf of NSB.

Keather McLoone

6/2/2010

Document, Report, or Work plan Review - other

Reviewed Sampling and Analysis Plan for Kaktovik KIC Pad. The objective of this investigation is to delineate the nature and extent of contamination along the northern edge of the pad near Waldo Arms Hotel and to sample surface water pathways to evaluate potential migration pathways. Up to seven test pits will be excavated and sampled and up to three water samples will be collected.

Bill O'Connell

6/17/2011

Document, Report, or Work plan Review - other

Reviewed 2010 KIC Pad Assessment Report. Six test pits were excavated along the northern side of the property and four surface water samples were collected from nearby water bodies. 2-3 soil samples were submitted per test pit and one or more contaminants were detected in each test pit at concentrations above ADEC cleanup levels. DRO was detected up to 3,860 mg/kg at 4.5 feet bgs in test pit 3, GRO was detected up to 275 mg/kg at 6.0 feet bgs in test pit 6, and benzene was detected up to 1.92 mg/kg at 3.0 feet bgs in test pit 6. Surface water samples -001 and -002 collected from the same water body downgradient from test pit 3 contained benzene in excess of Alaska Water Quality Standards and also DRO and GRO at concentrations indicative of fuel contamination.

Bill O'Connell

12/8/2011

Meeting or Teleconference Held

Meeting today with NSB to discuss proposed 2012 activities at KIC Pad. CAP / 2012 disposal of polluted soils at landfill, landfarm remaining soils as requied. Turn area into commericial parking area for Corp, fence off playground.

Bill O'Connell

4/30/2012

Potentially Responsible Party/State Interest Letter

PRP letter sent to property owner Kaktovik Inupiat Corporation. Response received this date. No immediate action is anticipated.

Bill O'Connell

11/14/2012

Meeting or Teleconference Held

O'Connell met with NSB to discuss site status and potential future activities at the site. Pending landowner agreement and Permit for itended use.

Keather McLoone

11/22/2013

Meeting or Teleconference Held

Meeting via telephone with previous DEC PM, NSB and NSB consultant S&W to discuss remedial options for this site.

Keather McLoone

9/30/2014

Document, Report, or Work plan Review - other

Date of receipt via email of NSB Kaktovk KIC Pad Site, Draft Site Characterization Work Plan. Revised figures sent 10/6/14. Email sent on 10/6/14 indicating an approval without conditions would be sent in the mail. Letter sent on 10/13/14.

Keather McLoone

2/12/2015

Document, Report, or Work plan Review - other

Date of document entitled Kaktovik KIC Pad 2014 Site Characterization Technical Memorandum. Activities performed in 2014 include advancing 244 soil borings, collecting 302 soil samples, converting ten borings into monitoring wells. Groundwater, surface water and soil samples collocated with surface water samples have not yet been collected due to winter conditions. The tech memo makes recommendations for removal and reuse of material contaminated with less than 500 mg/kg DRO, less than 0.5 mg/kg benzene and less than 15 mg/kg BTEX as backfill. The rest of the material removed will be stockpiled for later treatment which is currently planned to be onsite thermal treatment which would be an acceptable treatment process as PCBs and chlorinated compounds are not COCs at this site.

Keather McLoone

8/27/2015

Document, Report, or Work plan Review - other

Reviewed the Kaktovik Inupiat Corporation (KIC) Pad Corrective Action Plan dated July 2015. The corrective action plan (CAP) entails excavation and stockpiling of contaminated pad material, and confirmation soil sampling in accordance with the 2010 Draft Field Sampling Guidance. Stockpiled soil will eventually be treated using a soil remediation unit (SRU). Excavated soil from clean portions of the pad will be used to backfill the excavation first, followed by purchased fill and post-treated material from the SRU (after sampling).

Joshua Barsis

9/8/2016

Update or Other Action

Complaint was made that contaminated surface water with a sheen was migrating from the KIC pad to the adjacent property (Waldo Arms Hotel). Surface water observations and samples were collected in August in response to the complaint. Surface water samples were collected from the KIC pad (16-KKIC-PadWater) and also from the surface water adjacent the hotel (Sample 16-KKIC-OffPad), and were analyzed for BTEX and PAHs. Sample 16-KKIC-OffPad, collected from adjacent the hotel, exceeded Alaska Water Quality Standards (AWQS) for TAqH, but not TAH. The sample collected from the KIC pad did not exceed AWQS for TAH or TAqH. A sheen was noted on surface water, but field staff qualified the sheen as biogenic in nature. Based on the information provided in the site visit report (dated September 1, 2016), it does not appear that the contamination from the KIC pad is migrating via overland flow toward Waldo Arms Hotel. Further excavation will be conducted at the KIC pad and additional surface water samples will be collected to obtain additional information.

Joshua Barsis

1/17/2017

Update or Other Action

Letter sent to NSB on this day detailing the current status/progress of 22 active contaminated sites, including this site.

Joshua Barsis

8/9/2017

Site Visit

ADEC inspected this site on August 9, 2017. Excavation of contaminated soil occurred at this site in 2016, as proposed in the July 2015 Kaktovik Inupiat Corporation (KIC) Pad Corrective Action Plan. Provisions to backfill the excavation were included in the July 2015 Corrective Action Plan, however large portions of the excavation were not backfilled as planned. As a result, and as observed during the inspection, a large surface water body has formed (not previously present) with an apparent petroleum sheen visible in the middle.

Joshua Barsis

11/20/2017

Update or Other Action

Letter sent on this day as a follow up to the last version of this letter, dated January 17, 2017, and as a follow up to a meeting with NSB on November 17, 2017. This letter details the current status/progress of 23 active contaminated sites, including this site.

Joshua Barsis

9/17/2018

Document, Report, or Work plan Review - other

Reviewed of the NSB Kaktovik KIC Pad Interim Removal Action Report, dated September 6, 2018. The report details site characterization and remedial action activities completed between July and December in 2015. Prior to starting the excavation, water samples were collected from one surface water body (pond 4) and from 8 of 10 porewater monitoring wells that had been installed in 2014, but were not sampled previously. Two of the wells, MW5 and MW10 could not be sampled because there was not a sufficient volume of water after purging the wells. Surface water analytical results from Pond 4 exceeded Alaska Water Quality Standards (AWQS) for Total Aromatic Hydrocarbons (TAH) and Total Aqueous Hydrocarbons (TAqH). Samples collected from Wells WM1 through MW3, MW6, MW8, and MW9 all exhibited contaminants above Table C groundwater cleanup levels (GCLs). Table C GCLs are meant to be protective of current or future water use. Although porewater is not used for drinking or showering in Kaktovik, the detected contaminants are compared to Table C GCLs to determine if the porewater is acting as a transport mechanism to surface water, as well to better determine the extent of contamination. The most contaminated well, Well MW1, exhibited concentrations of gasoline range organics (GRO) up to 55.4 mg/l, diesel range organics (DRO) up to 3.38 mg/l, benzene up to 2,490 µg/l, ethylbenzene up to 1,430 µg/l, and toluene up to 12,600 µg/l; all of which exceed Table C GCLs and AWQS criteria. Excavation was performed at Areas 1 through 4 in August 2015, and at Area 5 in November and December 2015. In total, roughly 3,000 cubic yards of contaminated material was removed and stockpiled onsite. Confirmation soil samples collected from the excavation indicate that contaminated soil remains onsite above human health cleanup levels. Report recommendations include remediating and/or disposing of the impacted stockpile of material, additional backfilling to bring the pad to grade to limit onsite surface water ponding, and semi-annual surface water and porewater monitoring. Although ADEC does not have any particular objection to the proposed actions, as is, this site is not eligible for site closure. Data gaps preventing this site from closure include: remaining impacts above human health levels, cumulative risk exceedances, and the extent of contamination has not been determined.

Joshua Barsis

11/16/2018

Update or Other Action

Letter sent on this day as a follow up to the last version of this letter, dated November 20, 2017, and at the request of the North Slope Borough (NSB). This letter details the current progress of 24 active contaminated sites, including this site.

Joshua Barsis

4/8/2019

Document, Report, or Work plan Review - other

Reviewed the April 2, 2019 NSB Kaktovik KIC Pad Supplemental Removal Action Work Plan – Draft. Proposed activities detailed in the plan generally consist of additional removal of contaminated gravel, sheen testing, and continued groundwater and surface water sampling. ADEC issued a letter on this day (April 8) indicating that the work plan needed a few more details before being approved; see file for letter.

Joshua Barsis

9/5/2019

Site Characterization Workplan Approved

The updated April 2, 2019 work plan was conditionally approved. Conditions were to collect a surface water sample from the area of sheening and to submit a notice of intent and bmp plan before backfilling.

Joshua Barsis

2/19/2020

Enforcement Action

Notice of Violation issued to NSB on February 18, 2020. See file for more information.

Joshua Barsis

6/29/2022

Enforcement Agreement or Order

A compliance order by consent (COBC) was signed by the North Slope Borough and ADEC Division of SPAR. The COBC identifies corrective actions that the NSB will take to manage cleanup waste and characterize and remediate contaminated sites and spills.

Lisa Krebs-Barsis

9/20/2023

Site Visit

DEC Staff A. Carlson and S. Joyce (PPR) conducted site visit in conjunction with NSB environmental representative on September 14, and 15, 2023. The site was inspected for waste and for compliance with the COBC.

Andrea Carlson

3/20/2024

Document, Report, or Work plan Review - other

Reviewed and approved Kaktovik KIC Pad Contaminated Soil Stockpile Sampling Plan to do waste characterization for a >3000 cy contaminated soil stockpile and determine disposal options.

Andrea Carlson

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Alaska Department of Environmental Conservation

Site Report: NSB Kaktovik KIC Pad

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State of Alaska Department of Environmental Conservation