Site Report: Frontier Base Camp

Site Name:	Frontier Base Camp
Address:	Spine Road, 12 Miles NW of Deadhorse, Prudhoe Bay, AK 99734
File Number:	300.38.070
Hazard ID:	108
Status:	Active
Staff:	Bill O'Connell, 9072693057 bill.oconnell@alaska.gov
Latitude:	70.323239
Longitude:	-148.777600
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

Lease tract has history of reported and unreported oil spills and also potential dumping of solid wastes. Fuel storage and dispensing activities resulted in diesel contamination in large portions of the pad and petroleum contamination appeared to be migrating from the pad into the surrounding tundra during a site visit in 2009. Corrective action is underway at the site including the installation of a barrier liner and the excavation and treatment of contaminated soil via landfarming.

Action Information

Action Date	Action	Description	DEC Staff
10/24/1991	Site Ranked Using the AHRM	Initial ranking.	Mehrdad Nadem
12/2/1991	Site Characterization Workplan Approved	(Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)). A site assessment plan was submitted to the department for approval. PRP - Frontier Equipment Co., 2393 Adams Street, Fairbanks 99701.	Mehrdad Nadem
4/16/1992	Update or Other Action	Site sampling and analysis plan submitted to ADEC by AG Midland Co. for Frontier Equipment Co.	Mehrdad Nadem
4/26/1993	Update or Other Action	(Old R:Base Action Code = SA2R - Phase II SA Review (CS)). Site Assessment Progress Report submitted by A.G. Midland CO., Inc. and received by ADEC on this date. Soil samples indicate TPH up to 5000 mg/Kg and Arsenic up to 15 mg/Kg Borings advanced throughout pad. No base map and sample location map to identify exact location of samples. All sample submitted to laboratory for TPH analysis exceeded ADEC cleanup criteria. Contamination appears to extent to the base of the gravel pad. Seven areas of contamination were identified. No water samples were collected.	Mehrdad Nadem
1/6/1995	Site Number Identifier Changed	Old region = 40.	Scott Rose
10/15/1997	Update or Other Action	Environmental Investigation report submitted by Oil Spill Technology, Inc dated and recieved on this date. Visual inspection of area indicate potential areas of contamination around fueling area and the fuel storage area as well as 15 minor soil stains around perimeter of gravel pad. 44 test holes, three to six feet deep, were screened with PID. The 8 highest were sent to the lab for analysis. Lab results indicate DRO up to 4220 mg/Kg, GRO up to 341 mg/Kg, and total BTEX up to 59.2 mg/Kg.	Grant Lidren
1/10/2000	Update or Other Action	File forwarded to Fairbanks office for review.	Jim Frechione
5/1/2002	Update or Other Action	Workplan for additional site characterization in area of "aboveground fuel storage" submitted for review.	Renee Evans
5/4/2002	Update or Other Action	Action sheet from Kay Rawlings - regarding not to proceed with cost recovery at this time, see file for hard copy.	Jim Frechione
5/6/2002	Update or Other Action	Letter dated May 5, 2002 review of: Workplan for Investigation and Remediation at the "Old Frontier Pad" - Prudhoe Bay, AK "In summary, the fuel product and containment area removal task should be completed prior to site characterization activities. The site characterization activity shall identify the nature and extent of contamination in the fuel storage area and that information shall be submitted to the ADEC for review prior to determining additional work under the Site Cleanup Agreement and Release document."	Jim Frechione
8/21/2003	Update or Other Action	Letter from FESCO attorney (Susan Reeves) regarding difficulties gaining access to the site from the lessee (Bernie Karl). FESCO has reportedly spent $81,362 to date on their $200,000 obligation. They propose to submit the balance ($118,638) to the State (DNR or DEC) in order to fulfill the commitment in the 2001 agreement. AG Cam Leonard will draft a response proposing FESCO submit $$ to DNR. DEC could then work with DNR to ensure the site investigation continues.	Jim Frechione
11/13/2006	Update or Other Action	Remaining funds were submitted to DNR and are being held in case lease is terminated.	Bill O'Connell
11/20/2006	Meeting or Teleconference Held	ADEC (Frechione) and ADNR (Menefee; Fogels and Menge) met with Bernie Karl to discuss cleanup of the Frontier Equipment Pad. It was agreed that the fuel storage area to be addressed under the FESCO agreement should continue. There is $118,000 remaining from the agreement to be used for cleanup. All parties agreed that the tanks need to be moved; the soil sampled and impacted soil excavated and treated. Mr Karl indicated he could do the work cheaper than others and wanted to discuss how this could be accomplished. ADNR will evaluate contractual requirements prior to a decision.	Jim Frechione
12/1/2006	Update or Other Action	Letter sent from ADNR to Bernie Karl detailing the agreement made during the 11/20/06 meeting. The activities noted above; tank removal, cleaning, excavation and treatment of contaminated soils are the focus of the agreement and are considered Phase I of the cleanup. Phase I will focus on the former fuel storage area and additional characterization will proceed as needed following Phase I.	Bill O'Connell
1/14/2008	GIS Position Updated	Position verified	Grant Lidren
1/14/2008	Exposure Tracking Model Ranking	Initial ranking with ETM completed.	Grant Lidren
9/10/2009	Site Visit	Site visit on 9/2/09. Moderate to heavy sheen noted on surface water along the northern and western pad edges when sediments were disturbed.	Bill O'Connell
1/6/2010	Meeting or Teleconference Held	Meeting with ADNR and Mr. Bernie Karl. Mr. Karl is interested in moving forward with investigation/remediation at the site and ADEC will work with ADNR and DOL to prepare a COBC outlining Mr. Karl's responsibilities at the site. Mr. Karl will be hiring a consultant with the objective of investigating contamination at the former drum storage area, removing contaminated soil from former fuel storage areas and installing a vertical barrier liner to inhibit ongoing transport of contaminants off site to the surrounding tundra.	Bill O'Connell
1/22/2010	Meeting or Teleconference Held	Meeting today with Bernie Karl and associates. Topics discussed include the technical approach to characterizing the former drum storage area, excavation of soil from former fuel storage areas and the placement of a vertical barrier liner in areas where contamination is migrating to the tundra.	Bill O'Connell
7/22/2010	Update or Other Action	Compliance Order by Consent from ADEC and Memorandum of Agreement from ADNR mailed to Frontier Equipment.	Bill O'Connell
8/3/2010	Meeting or Teleconference Held	Teleconference between Frontier Equipment, ADNR, DOL, Weston Solutions, and ADEC to discuss COBC and MOA. The results of the teleconference are that Frontier has 30 days to submit a CAP (by Sept. 2) and based on the schedule recommended by Weston, the CAP time frame will be adjusted as necessary.	Bill O'Connell
9/2/2010	Update or Other Action	Deadline for submission of CAP extended to October 4, 2010.	Bill O'Connell
10/4/2010	Update or Other Action	Draft Corrective Action Plan submitted on this date.	Bill O'Connell
12/2/2010	Cleanup Plan Approved	ADEC submitted comments to the Draft Corrective Action Plan for Frontier Base Camp which were addressed in the Final, submitted December 2, 2010. Corrective action at the site will include the installation of a vertical barrier liner (VBL) around the perimeter of the pad, excavation and landfarming of approximately 35,000 cy of contaminated soil from 5 areas, and additional characterization at locations identified during previous investigations. The VBL will be installed in Spring 2011 prior to commencement of excavation activities. The five planned excavation areas A-E correspond with areas found to be contaminated during previous investigations. Excavated soil will be landfarmed on the eastern portion of the pad and then used as backfill in open excavations once it has been treated and DRO concentrations are below 500 mg/kg. It is anticipated that excavation will proceed to the maximum recommended depth of 0.5 feet below tundra grade after which composite confirmation samples will be collected from the floor and sidewalls. It is also anticipated that it will take 2-3 years to complete the excavation and landfarming effort.	Bill O'Connell
12/30/2010	Update or Other Action	Revised COBC emailed to Mr. Karl.	Bill O'Connell
5/12/2011	Update or Other Action	Based on schedule proposed by Alaska Frontier Construction, the date for the installation of the vertical barrier liner has been extended from June 30, 2011 to December 30, 2011. The liner will be installed in two phases beginning in June 2011. Excavation and landfarming are anticipated to begin in 2012 after equipment is removed from the pad.	Bill O'Connell
3/13/2013	Document, Report, or Work plan Review - other	Reviewed 2012 Frontier Pad Field Summary Report. Activities conducted in 2012 included excavating and landfarming soil from Area E, excavating test pits at Area E to evaluate the extent of contamination, and segregating and landfarming soil generated during the installation of the vertical barrier liner. Area E is located to the east of the Former Fueling area and Former Fuel Storage Area. Surface soil in portions of Area E to a depth of approximately 1 foot bgs was determined to be clean and was stockpiled for sampling and potential reuse as backfill. Contaminated soil was then excavated to the pad/tundra interface at approximately 5 feet bgs resulting in the removal of approximately 1,250 cy of contaminated soil which was landfarmed just to the west on top of Area D. Confirmation samples contained DRO up to 5,640 mg/kg and GRO up to 885 mg/kg in a sidewall sample from 18 inches bgs. Bottom samples contained DRO up to 1,960 mg/kg at 5 feet bgs. In an effort to evaluate the extent of contamination at Area E, three test pits were excavated to the north, south, and east of Area E. Test pit samples indicated DRO contamination above the Method One cleanup level of 500 mg/kg was present to the east of Area E and to a lesser extent to the north. Samples collected from landfarmed soil contained DRO up to 1,610 mg/kg.	Bill O'Connell
5/22/2013	Meeting or Teleconference Held	Teleconference with consultants and contractors to discuss scope of work for 2013 landfarming activities.	Bill O'Connell
12/17/2013	Document, Report, or Work plan Review - other	Reviewed 2013 Frontier Pad Field Summary Report. The objective of the 2013 work was to delineate and excavate contaminated soil from the east side of Area E, located near the Former Fueling Area and to evaluate remedial progress at the landfarm area known as Cell 2. Cell 1 was sampled in 2012 and did not contain contaminants above cleanup levels. Samples from Cell 2 collected in July 2013 contained DRO up to 1,140 mg/kg, so landfarm tilling continued in July and August. The landfarm was sampled again in August 2013 and DRO was detected up to 825 mg/kg. Due to the slow attenuation of soils during 2013, no additional excavation was conducted in Area E.	Bill O'Connell
2/26/2015	Document, Report, or Work plan Review - other	Reviewed 2014 Frontier Pad Field Summary Report. Cell #2 was reportedly tilled during July and August 2014 and soil samples were collected at the end of July. DRO was detected in the three samples at concentrations ranging from 661 mg/kg to 784 mg/kg.	Bill O'Connell
4/2/2015	Meeting or Teleconference Held	Meeting today with Bernie Karl to discuss progress at Frontier pad	Bill O'Connell
9/2/2015	Site Visit	Site visit with ADNR.	Bill O'Connell
4/4/2016	Document, Report, or Work plan Review - other	Soil samples collected from Cell 2 in September 2015 contained DRO ranging from 277 mg/kg to 428 mg/kg, all below the cleanup level of 500 mg/kg.	Bill O'Connell
6/9/2016	Document, Report, or Work plan Review - other	Reviewed Pilot Study Work Plan for Area E. Prior to beginning remediation activities, test trenches will be excavated to the pad/tundra interface along the boundaries of Area E to confirm the area that requires remediating. Trenches will be placed every 100 feet along the boundary of Area E and soil samples will be collected from one-foot intervals for field screening using a PID with approximately one sample per trench submitted for laboratory analysis for DRO, GRO, RRO, and BTEX. Following the additional characterization, baseline soil samples will be collected on 50-foot centers across the area proposed for remediation and the five soil samples with the highest PID results will be submitted for laboratory analysis for DRO, GRO, RRO, BTEX, and PAHs. The objective of the baseline sampling is to document contaminant concentrations in Area E prior to remediation. Surface water and sediment samples will be collected from three locations, one along each of the North, East, and South sides of the pad and shovel sheen testing will be conducted at 25 foot intervals where surface water is present adjacent to the pad. Surface water and sediment samples will be analyzed for DRO, GRO, RRO, BTEX, and PAHs. Remediation at Area E will be conducted via in-situ landfarming using a Rockwheel attachment that will till the soil from the surface to the 6 inches below tundra grade. Tilling will occur weekly from June to September. Progress soil samples will be collected at the end of each season in the same manner as the baseline samples however progress soil samples will consist of soil increments from one foot intervals composited into a single sample. Debris removal will be conducted on an ongoing basis based on availability of backhauls. Final confirmation sampling frequency will be determined at a later date	Bill O'Connell
7/6/2016	Site Visit	S. Schlichting conducted a joint site visit with DNR staff, P. Burns and S. Willison of Division of Land Mining and Water out of Fairbanks and T. DeRuyter, Northern Alaska Region Manager for Prevention, Preparedness and Response, SPAR. Advance notice was provided to the responsible party and environmental consultant. The site visit is detailed a site visit report found in the site electronic file and provided to the RP and his consultant. The visit consisted of a walkthrough of the property including the pad and the surrounding surface water to inspect source areas of contamination previously identified in the March 15, 2016 Corrective Action Plan and determine whether site preparation had occurred for the work outlined in the May 23, 2016 Area Pilot Study Work Plan, scheduled for implementation in June of 2016. Based on the site inspection, contamination from the pad appears to have impacted adjacent surface water and sediments based on presence of sheens along much of the pad's perimeter, and no work has commenced in Area E in accordance with the approved work plan for the pilot study.	Sally Schlichting
8/2/2016	Update or Other Action	Email from Bernie Karl indicating that corrective action would not be conducted in 2016.	Bill O'Connell
9/9/2016	Enforcement Action	Notice of Violation issued to Mr. Bernie Karl for failure to comply with regulatory requirements for site cleanup and investigation.	Bill O'Connell

Action Date

Action

Description

DEC Staff

10/24/1991

Site Ranked Using the AHRM

Initial ranking.

Mehrdad Nadem

12/2/1991

Site Characterization Workplan Approved

(Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)). A site assessment plan was submitted to the department for approval. PRP - Frontier Equipment Co., 2393 Adams Street, Fairbanks 99701.

Mehrdad Nadem

4/16/1992

Update or Other Action

Site sampling and analysis plan submitted to ADEC by AG Midland Co. for Frontier Equipment Co.

Mehrdad Nadem

4/26/1993

Update or Other Action

(Old R:Base Action Code = SA2R - Phase II SA Review (CS)). Site Assessment Progress Report submitted by A.G. Midland CO., Inc. and received by ADEC on this date. Soil samples indicate TPH up to 5000 mg/Kg and Arsenic up to 15 mg/Kg Borings advanced throughout pad. No base map and sample location map to identify exact location of samples. All sample submitted to laboratory for TPH analysis exceeded ADEC cleanup criteria. Contamination appears to extent to the base of the gravel pad. Seven areas of contamination were identified. No water samples were collected.

Mehrdad Nadem

1/6/1995

Site Number Identifier Changed

Old region = 40.

Scott Rose

10/15/1997

Update or Other Action

Environmental Investigation report submitted by Oil Spill Technology, Inc dated and recieved on this date. Visual inspection of area indicate potential areas of contamination around fueling area and the fuel storage area as well as 15 minor soil stains around perimeter of gravel pad. 44 test holes, three to six feet deep, were screened with PID. The 8 highest were sent to the lab for analysis. Lab results indicate DRO up to 4220 mg/Kg, GRO up to 341 mg/Kg, and total BTEX up to 59.2 mg/Kg.

Grant Lidren

1/10/2000

Update or Other Action

File forwarded to Fairbanks office for review.

Jim Frechione

5/1/2002

Update or Other Action

Workplan for additional site characterization in area of "aboveground fuel storage" submitted for review.

Renee Evans

5/4/2002

Update or Other Action

Action sheet from Kay Rawlings - regarding not to proceed with cost recovery at this time, see file for hard copy.

Jim Frechione

5/6/2002

Update or Other Action

Letter dated May 5, 2002 review of: Workplan for Investigation and Remediation at the "Old Frontier Pad" - Prudhoe Bay, AK "In summary, the fuel product and containment area removal task should be completed prior to site characterization activities. The site characterization activity shall identify the nature and extent of contamination in the fuel storage area and that information shall be submitted to the ADEC for review prior to determining additional work under the Site Cleanup Agreement and Release document."

Jim Frechione

8/21/2003

Update or Other Action

Letter from FESCO attorney (Susan Reeves) regarding difficulties gaining access to the site from the lessee (Bernie Karl). FESCO has reportedly spent $81,362 to date on their $200,000 obligation. They propose to submit the balance ($118,638) to the State (DNR or DEC) in order to fulfill the commitment in the 2001 agreement. AG Cam Leonard will draft a response proposing FESCO submit $$ to DNR. DEC could then work with DNR to ensure the site investigation continues.

Jim Frechione

11/13/2006

Update or Other Action

Remaining funds were submitted to DNR and are being held in case lease is terminated.

Bill O'Connell

11/20/2006

Meeting or Teleconference Held

ADEC (Frechione) and ADNR (Menefee; Fogels and Menge) met with Bernie Karl to discuss cleanup of the Frontier Equipment Pad. It was agreed that the fuel storage area to be addressed under the FESCO agreement should continue. There is $118,000 remaining from the agreement to be used for cleanup. All parties agreed that the tanks need to be moved; the soil sampled and impacted soil excavated and treated. Mr Karl indicated he could do the work cheaper than others and wanted to discuss how this could be accomplished. ADNR will evaluate contractual requirements prior to a decision.

Jim Frechione

12/1/2006

Update or Other Action

Letter sent from ADNR to Bernie Karl detailing the agreement made during the 11/20/06 meeting. The activities noted above; tank removal, cleaning, excavation and treatment of contaminated soils are the focus of the agreement and are considered Phase I of the cleanup. Phase I will focus on the former fuel storage area and additional characterization will proceed as needed following Phase I.

Bill O'Connell

1/14/2008

GIS Position Updated

Position verified

Grant Lidren

1/14/2008

Exposure Tracking Model Ranking

Initial ranking with ETM completed.

Grant Lidren

9/10/2009

Site Visit

Site visit on 9/2/09. Moderate to heavy sheen noted on surface water along the northern and western pad edges when sediments were disturbed.

Bill O'Connell

1/6/2010

Meeting or Teleconference Held

Meeting with ADNR and Mr. Bernie Karl. Mr. Karl is interested in moving forward with investigation/remediation at the site and ADEC will work with ADNR and DOL to prepare a COBC outlining Mr. Karl's responsibilities at the site. Mr. Karl will be hiring a consultant with the objective of investigating contamination at the former drum storage area, removing contaminated soil from former fuel storage areas and installing a vertical barrier liner to inhibit ongoing transport of contaminants off site to the surrounding tundra.

Bill O'Connell

1/22/2010

Meeting or Teleconference Held

Meeting today with Bernie Karl and associates. Topics discussed include the technical approach to characterizing the former drum storage area, excavation of soil from former fuel storage areas and the placement of a vertical barrier liner in areas where contamination is migrating to the tundra.

Bill O'Connell

7/22/2010

Update or Other Action

Compliance Order by Consent from ADEC and Memorandum of Agreement from ADNR mailed to Frontier Equipment.

Bill O'Connell

8/3/2010

Meeting or Teleconference Held

Teleconference between Frontier Equipment, ADNR, DOL, Weston Solutions, and ADEC to discuss COBC and MOA. The results of the teleconference are that Frontier has 30 days to submit a CAP (by Sept. 2) and based on the schedule recommended by Weston, the CAP time frame will be adjusted as necessary.

Bill O'Connell

9/2/2010

Update or Other Action

Deadline for submission of CAP extended to October 4, 2010.

Bill O'Connell

10/4/2010

Update or Other Action

Draft Corrective Action Plan submitted on this date.

Bill O'Connell

12/2/2010

Cleanup Plan Approved

ADEC submitted comments to the Draft Corrective Action Plan for Frontier Base Camp which were addressed in the Final, submitted December 2, 2010. Corrective action at the site will include the installation of a vertical barrier liner (VBL) around the perimeter of the pad, excavation and landfarming of approximately 35,000 cy of contaminated soil from 5 areas, and additional characterization at locations identified during previous investigations. The VBL will be installed in Spring 2011 prior to commencement of excavation activities. The five planned excavation areas A-E correspond with areas found to be contaminated during previous investigations. Excavated soil will be landfarmed on the eastern portion of the pad and then used as backfill in open excavations once it has been treated and DRO concentrations are below 500 mg/kg. It is anticipated that excavation will proceed to the maximum recommended depth of 0.5 feet below tundra grade after which composite confirmation samples will be collected from the floor and sidewalls. It is also anticipated that it will take 2-3 years to complete the excavation and landfarming effort.

Bill O'Connell

12/30/2010

Update or Other Action

Revised COBC emailed to Mr. Karl.

Bill O'Connell

5/12/2011

Update or Other Action

Based on schedule proposed by Alaska Frontier Construction, the date for the installation of the vertical barrier liner has been extended from June 30, 2011 to December 30, 2011. The liner will be installed in two phases beginning in June 2011. Excavation and landfarming are anticipated to begin in 2012 after equipment is removed from the pad.

Bill O'Connell

3/13/2013

Document, Report, or Work plan Review - other

Reviewed 2012 Frontier Pad Field Summary Report. Activities conducted in 2012 included excavating and landfarming soil from Area E, excavating test pits at Area E to evaluate the extent of contamination, and segregating and landfarming soil generated during the installation of the vertical barrier liner. Area E is located to the east of the Former Fueling area and Former Fuel Storage Area. Surface soil in portions of Area E to a depth of approximately 1 foot bgs was determined to be clean and was stockpiled for sampling and potential reuse as backfill. Contaminated soil was then excavated to the pad/tundra interface at approximately 5 feet bgs resulting in the removal of approximately 1,250 cy of contaminated soil which was landfarmed just to the west on top of Area D. Confirmation samples contained DRO up to 5,640 mg/kg and GRO up to 885 mg/kg in a sidewall sample from 18 inches bgs. Bottom samples contained DRO up to 1,960 mg/kg at 5 feet bgs. In an effort to evaluate the extent of contamination at Area E, three test pits were excavated to the north, south, and east of Area E. Test pit samples indicated DRO contamination above the Method One cleanup level of 500 mg/kg was present to the east of Area E and to a lesser extent to the north. Samples collected from landfarmed soil contained DRO up to 1,610 mg/kg.

Bill O'Connell

5/22/2013

Meeting or Teleconference Held

Teleconference with consultants and contractors to discuss scope of work for 2013 landfarming activities.

Bill O'Connell

12/17/2013

Document, Report, or Work plan Review - other

Reviewed 2013 Frontier Pad Field Summary Report. The objective of the 2013 work was to delineate and excavate contaminated soil from the east side of Area E, located near the Former Fueling Area and to evaluate remedial progress at the landfarm area known as Cell 2. Cell 1 was sampled in 2012 and did not contain contaminants above cleanup levels. Samples from Cell 2 collected in July 2013 contained DRO up to 1,140 mg/kg, so landfarm tilling continued in July and August. The landfarm was sampled again in August 2013 and DRO was detected up to 825 mg/kg. Due to the slow attenuation of soils during 2013, no additional excavation was conducted in Area E.

Bill O'Connell

2/26/2015

Document, Report, or Work plan Review - other

Reviewed 2014 Frontier Pad Field Summary Report. Cell #2 was reportedly tilled during July and August 2014 and soil samples were collected at the end of July. DRO was detected in the three samples at concentrations ranging from 661 mg/kg to 784 mg/kg.

Bill O'Connell

4/2/2015

Meeting or Teleconference Held

Meeting today with Bernie Karl to discuss progress at Frontier pad

Bill O'Connell

9/2/2015

Site Visit

Site visit with ADNR.

Bill O'Connell

4/4/2016

Document, Report, or Work plan Review - other

Soil samples collected from Cell 2 in September 2015 contained DRO ranging from 277 mg/kg to 428 mg/kg, all below the cleanup level of 500 mg/kg.

Bill O'Connell

6/9/2016

Document, Report, or Work plan Review - other

Reviewed Pilot Study Work Plan for Area E. Prior to beginning remediation activities, test trenches will be excavated to the pad/tundra interface along the boundaries of Area E to confirm the area that requires remediating. Trenches will be placed every 100 feet along the boundary of Area E and soil samples will be collected from one-foot intervals for field screening using a PID with approximately one sample per trench submitted for laboratory analysis for DRO, GRO, RRO, and BTEX. Following the additional characterization, baseline soil samples will be collected on 50-foot centers across the area proposed for remediation and the five soil samples with the highest PID results will be submitted for laboratory analysis for DRO, GRO, RRO, BTEX, and PAHs. The objective of the baseline sampling is to document contaminant concentrations in Area E prior to remediation. Surface water and sediment samples will be collected from three locations, one along each of the North, East, and South sides of the pad and shovel sheen testing will be conducted at 25 foot intervals where surface water is present adjacent to the pad. Surface water and sediment samples will be analyzed for DRO, GRO, RRO, BTEX, and PAHs. Remediation at Area E will be conducted via in-situ landfarming using a Rockwheel attachment that will till the soil from the surface to the 6 inches below tundra grade. Tilling will occur weekly from June to September. Progress soil samples will be collected at the end of each season in the same manner as the baseline samples however progress soil samples will consist of soil increments from one foot intervals composited into a single sample. Debris removal will be conducted on an ongoing basis based on availability of backhauls. Final confirmation sampling frequency will be determined at a later date

Bill O'Connell

7/6/2016

Site Visit

S. Schlichting conducted a joint site visit with DNR staff, P. Burns and S. Willison of Division of Land Mining and Water out of Fairbanks and T. DeRuyter, Northern Alaska Region Manager for Prevention, Preparedness and Response, SPAR. Advance notice was provided to the responsible party and environmental consultant. The site visit is detailed a site visit report found in the site electronic file and provided to the RP and his consultant. The visit consisted of a walkthrough of the property including the pad and the surrounding surface water to inspect source areas of contamination previously identified in the March 15, 2016 Corrective Action Plan and determine whether site preparation had occurred for the work outlined in the May 23, 2016 Area Pilot Study Work Plan, scheduled for implementation in June of 2016. Based on the site inspection, contamination from the pad appears to have impacted adjacent surface water and sediments based on presence of sheens along much of the pad's perimeter, and no work has commenced in Area E in accordance with the approved work plan for the pilot study.

Sally Schlichting

8/2/2016

Update or Other Action

Email from Bernie Karl indicating that corrective action would not be conducted in 2016.

Bill O'Connell

9/9/2016

Enforcement Action

Notice of Violation issued to Mr. Bernie Karl for failure to comply with regulatory requirements for site cleanup and investigation.

Bill O'Connell

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Alaska Department of Environmental Conservation

Site Report: Frontier Base Camp

Site Chronology

IC / Closure Details

Documents

Associated Sites

Problems/Comments

Action Information

Contaminant Information

Control Type

Requirements

Missing Location Data

State of Alaska Department of Environmental Conservation