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Site Report: VECO Tract 2 Dalton Pad

Site Name: VECO Tract 2 Dalton Pad
Address: DNR Deadhorse Lease Tract 2, Deadhorse, AK 99734
File Number: 300.38.046
Hazard ID: 2684
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 70.232400
Longitude: -148.386500
Horizontal Datum:NAD27

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.

Problems/Comments

Site contained diesel and gasoline storage tanks, shop used for parts cleaning and degreasing, pad also used for coiled tubing storage and cleaning. DRO and GRO contamination discovered on site Also called "Dalton Pad" DNR Lease to Northern Oilfield Services, Sublease to Canadian Fracmaster, 1983-1988, lease assumption by VECO, 1988. VECO bought by CH2M Hill in 2007.

Action Information

Action Date Action Description DEC Staff
9/1/1993 Update or Other Action (Old R:Base Action Code = SA2R - Phase II SA Review (CS)). Veco met with staff to review site assessment report. Assessment performed by HARTEC Management Consultants without prior department approval and without an approved QA/QC Plan. Hydrocarbon contamination identified by volume not estimated. Geophysical survey (EM-31) identified a general area of inferred hydrocarbon contamination. Tim Law
9/2/1993 Update or Other Action (Old R:Base Action Code = RAPR - Remedial Action Plan Review (CS)). Veco met with staff to discuss remedial action plan. Propose to remediate contaminated soil by hot water soil washing. Plan was not submitted prior to the meeting. Plan was verbally approved on September 27, 1993 to allow excavation prior to pad freeze up. Excavation completed by October 21, 1993. Department received analytical results on 11/9/93 indicating additional contamination remained on the pad. Tim Law
11/22/1993 Update or Other Action VECO met with ADEC staff to request a deferral of additional excavation to next field season. Department concurred Tim Law
8/31/1994 Update or Other Action teleconference between ADEC and Tom McGee/VECO. Faxed sample results (8/29/94) indicated additional contamination remained on site. ADEC requested a final report with all analytical data including confirmation data from Worldwide Remediation (soil washer). No report was received. Tim Law
3/1/1996 Site Added to Database Site added after meeting with DNR staff. Scott Rose
3/1/1996 Site Ranked Using the AHRM Initial ranking. Scott Rose
8/28/2006 Update or Other Action Site transferred from Nuechterlein to O'Connell. Aggie Blandford
9/25/2006 Update or Other Action Contacted Amanda Finnegan, HSE for VECO. Emailed copy of 1996 letter from Scott Rose to VECO requesting information. Also emailed copy of site figure showing Fracmaster sublease at the Dalton Pad. Bill O'Connell
8/22/2007 Update or Other Action Site visit today. Former sublease area currently being used for equipment storage. No sheen on adjacent surface water. Bill O'Connell
2/8/2008 Update or Other Action Received 2007 site inspection report. Two areas of light to moderate sheen were observed when sediments were disturbed along the NW and SW edges of the pad. Bill O'Connell
2/12/2008 Meeting or Teleconference Held Meeting today with Elaine Niles of CH2M Hill, formerly VECO. Additional characterization may potentially occur in 2008 to evaluate if pad contamination is contributing to the off pad sheen observed in 2007. Bill O'Connell
5/23/2008 Site Characterization Workplan Approved Received work plan for additional site characterization from former VECO/CH2M Hill. The investigation will include up to 28 soil boring across all of Tract 2, with approximately 11 located at the former Fracmaster sublease. Up to 2 soil samples will be collected from each borehole. Up to 8 surface water samples will be collected from the northern and western edges of the pad and analyzed for TAH and TAqH. Bill O'Connell
8/18/2008 Site Characterization Workplan Approved Corrective Action Work Plan received. Activities outlined in the WP are based on preliminary data from the recent investigation at Tract 2, which identified three areas of hydrocarbon contamination: the fracmaster sublease, Area A west of the dry storage building, and Area B in between the dry storage building and the mancamp. Contaminated soil will be excavated from the three areas and transported to AIC for thermal treatment. Confirmation samples will be collected from the bottom and sidewalls of the excavations in accordance with ADEC guidance and analyzed for DRO, RRO, and BTEX. Bill O'Connell
4/1/2009 Document, Report, or Work plan Review - other Reviewed Phase II Assessment for tract 2 (Dalton Pad). 38 boreholes were advanced at areas of interest identified during the Phase I and 78 soil samples were collected and analyzed for DRO/RRO, GRO, VOCs PAHs SVOCs and Metals. A subset of three samples was also analyzed for PCBs. Surface water samples were collected at 7 locations and analyzed for VOCs and PAHs. Based on soil sample results, four areas of hydrocarbon impacts were identified; Area A (Former Fuel Dock), Area B (Generator Shed) Area FW (Former Fracmaster sublease) and soil boring RSE-23. At Area A, DRO was detected up to 1,990 mg/kg, GRO was detected up to 2,740 mg/kg, and benzene was detected up to 30.1 mg/kg. Impacts were present to a depth of 6 feet bgs. At Area B, DRO was detected up to 2,670 mg/kg and benzene up to 0.0329 mg/kg. Benzene was not detected in the majority of samples and impacts were present up to 6 feet bgs. At Area FM, DRO was detected up to 788 mg/kg and benzene up to 0.214 mg/kg. Impacts were present up to 4 feet bgs. At boring RSE-23, DRO was detected up to 2,750 mg/kg and benzene up to 0.0252 mg/kg, but impacts appeared limited in depth and area. The surface water sample from location SW-1 contained benzene at 68.2 ug/l, which exceeds AWQS and sheen was noted at sampling areas SW-1 and SW-3 Bill O'Connell
4/15/2009 Document, Report, or Work plan Review - other Reviewed 2008 Tract 2 Corrective Actions Interim Letter Report. Three areas of hydrocarbon impacted soil were found at Tract 2, Areas A, B, and FM. Area A is approximately 21,280 square feet in area. The number of cubic yards of soil excavated at each area was not calculated for this report. Confirmation samples collected from the limits of the excavation at Area A contained DRO up to 1,100 mg/kg and benzene up to 0.699 mg/kg. Area B was approximately 7,168 square feet in area. Confirmation samples collected from the limits of the excavation at Area B Contained DRO up to 1,170 mg/kg and benzene up to 0.159 mg/kg. Area FM was approximately 12,415 square feet in area. Confirmation samples collected at the limits of the excavation at area FM contained DRO up to 8,000 mg/kg and benzene up to 1.89 mg/kg. The report cites potential biogenic interference from the peat sample matrix in some samples; however the specific soil type was not identified for each individual sample. Metals were not detected in any sample above cleanup levels and no VOCs, other than benzene, were detected above cleanup levels, however in some cases the method PQL was above the cleanup levels. Contaminated soil was transported to AIC for thermal treatment. Bill O'Connell
4/30/2009 Document, Report, or Work plan Review - other Reviewed Corrective Actions Work Plan for Tract 2, Deadhorse, Alaska. Excavation will continue at Areas A, B, and FM in 2009 to remove petroleum contaminated soil. An additional area near soil boring 23 will also be excavated. Bill O'Connell
9/24/2009 Update or Other Action Post treatment sample data for thermal treatment of hydrocarbon contaminated soil from this site can be found on ADEC's internal server in the following folder: G:\SPAR\SPAR-CS\38 Case Files (Contaminated Sites)\300 Deadhorse - Prudhoe - Kuparuk\300.38.046 Fracmaster-VECO Inc. (Dalton Pad) Bill O'Connell
5/24/2010 Meeting or Teleconference Held Meeting with RSE to discuss results of Tract 2 excavation and potential site clousre issues. Bill O'Connell
7/14/2010 Document, Report, or Work plan Review - other Reviewed Tract 2 Final ADEC Closure Report. The report details the excavation, treatment, and sampling of impacted soil from 4 areas of the pad. Three of the areas named Area A, AA, and FM, eventually merged into one area, but were kept separate for sample numbering and materials tracking purposes. At Area A, approximately 4,558 cy of contaminated soil was excavated and treated at AIC in Deadhorse. During the excavation at Area A, a number of crushed drums were found buried in the pad. The drums were cleaned of any residual product and disposed of at the Oxbow Landfill. Confirmation samples collected at Area A contained DRO up to 582 mg/kg. At Area AA, approximately 1,364 cy of contaminated soil was excavated and treated at AIC. Confirmation samples collected at Area AA contained DRO up to 5,890 mg/kg, GRO up to 1,620 mg/kg, and xylenes up to 154.20 mg/kg. At Area FM, approximately 2,418 cy of contaminated soil was excavated and treated at AIC. Confirmation samples collected at Area FM contained DRO up to 8,000 mg/kg. At Area B, approximately 1,690 cy of contaminated soil was excavated and treated at AIC, confirmation samples collected at Area B contained DRO up to 1,170 mg/kg. Areas A, AA, and FM are along the southern edge of the pad and contaminated soil was generally left in place along the very edge of the pad so as not to disturb the native tundra or risk flooding the excavation. Area B is located between the Dry Storage Building and the Former Man Camp and contaminated soil was left in place along the western side of the excavation because further excavation may have threatened the building foundations in this area. Surface water samples were collected from 7 locations on two occasions during 2008. Two samples collected during the first sampling event contained TAH and TAqH above Alaska Water Quality Standards. These two areas were sampled again in 2009 following the removal action and both samples were below AWQS. Bill O'Connell
9/15/2010 Cleanup Complete Determination Issued The Alaska Department of Environmental Conservation, Contaminated Sites Program (ADEC) has completed a review of the environmental records associated with VECO Tract 2 Dalton Pad, located in Prudhoe Bay, Alaska. Based on the information provided to date, it has been determined that the contaminant concentrations remaining on site do not pose an unacceptable risk to human health or the environment and no further remedial action will be required as long as the site is in compliance with established institutional controls (ICs). Bill O'Connell
9/15/2010 Institutional Control Record Established Institutional Controls established and entered into the database. Bill O'Connell
5/30/2012 Institutional Control Compliance Review IC review conducted and reminder system set-up for 2015 follow-up with responsible party. Project manager changed from Bill O'Connell to IC Unit. Kristin Thompson
12/10/2015 Institutional Control Compliance Review Subsequent IC compliance review conducted. Scheduled to send an IC reminder letter in the near future. Nathan Maxwell
12/14/2015 Institutional Control Update IC reminder letter was sent to the responsible party on this date. Nathan Maxwell
6/20/2018 Institutional Control Compliance Review IC compliance review conducted. Closure/IC Details updated. Reminder system already set for next follow-up at the end of 2020. Kristin Thompson
8/28/2024 Institutional Control Compliance Review IC compliance review completed on this date. An IC reminder letter was e-mailed to the landowner. The next review will be in five years’ time. Gaige Robinson

Contaminant Information

Name Level Description Media Comments
DRO > Method 1 (Arctic only) Soil

Control Type

Type Details
Signed CS Determination

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site. Standard condition.
When Contaminated Soil is Accessible, Remediation Should Occur When it becomes accessible, contaminated soil remaining adjacent to the Dry Storage Building must be addressed and/or removed to the satisfaction of ADEC.
Other CH2MHill shall report to ADEC every 5 years to document land use, or report as soon as they become aware of any changes in land ownership and/or use.
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) Standard condition.

No associated sites were found.

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State of Alaska Department of Environmental Conservation

P.O. Box 111800
Juneau, AK 99811-1800
Phone: 907-465-5066
Fax: 907-465-5245
TDD: 800-770-8973
Physical Location: 410 Willoughby