Site Report: ConocoPhillips Kuparuk KCS Pad
| Site Name: | ConocoPhillips Kuparuk KCS Pad |
|---|---|
| Address: | Oliktok Point Road; ~32 Miles WNW of Prudhoe Bay, Prudhoe Bay, AK 99734 |
| File Number: | 300.38.317 |
| Hazard ID: | 26378 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 70.347800 |
| Longitude: | -149.732500 |
| Horizontal Datum: | WGS84 |
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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
During a March 2015 geotechnical effort associated with a proposed construction project in the northeast corner of the ConocoPhillips Kuparuk Construction Services pad, a diesel odor was noted in a soil sample. Soil samples were collected for laboratory analyses from a total of ten boreholes in the footprint area of the proposed building in an area that had previously been used for vehicle and equipment parking. Samples collected from between 0 and 5 feet below ground surface were analyzed for gasoline range organics, diesel range organics (DRO), residual range organics, benzene, toluene, ethylbenzene, xylenes, and lead. DRO exceeded DEC Method One cleanup criteria with concentrations up to 2,000 mg/kg.
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 4/22/2015 | Site Added to Database | A new site has been added to the database | Mitzi Read |
| 4/27/2015 | Exposure Tracking Model Ranking | Initial ranking with ETM completed for source area id: 79761 name: ConocoPhillips Kuparuk KCS Pad | Keather McLoone |
| 5/15/2015 | Update or Other Action | ADEC notified on this date that as part of this construction project, material will be excavated prior to the placement of thermo-siphons. Given concentrations above Method One, the limited characterization data available to date, and the poor precision of the single field duplicate collected an excavation plan will be submitted to address confirmation samples etc. | Keather McLoone |
| 5/20/2015 | Update or Other Action | On this date an email was sent by Kuparuk Environmental Coordinators to begin to outline a plan for handling contaminated gravel. ADEC requested information about the date excavation would begin as it sounded as if this construction project might be delayed due to the need for this planning. | Keather McLoone |
| 5/21/2015 | Update or Other Action | ADEC received via email a surface water sampling plan. Also on this date, ADEC met with Kuparuk Environmental Coordinator to discuss excavation plan. Excavation will now be delayed, possibly until June 8th, due to massive flooding problems in and around Deadhorse including the Dalton Highway. | Keather McLoone |
| 9/29/2015 | Document, Report, or Work plan Review - other | Date of receipt of 2015 Site Characterization Report, Kuparuk Construction Services Pad Northeast Corner. While it would appear that the documented concentrations at the site are likely equal to or below applicable cleanup levels, the following comments were sent in a letter to Conoco: • Please provide an electronic copy of documents in the future. • Text does not discuss surface water results with respect to TAH/TAqH criteria and Table 2 does not include TAqH sample results. ADEC calculated TAqH and no sample results exceed the applicable criteria. Table 2 contains a UJ flag which is not defined in table notes. • Composite sampling, such as that approved for some of this project, is not typically approved by ADEC CSP. Please refer to the Field Sampling Procedures Manual and include discrete sampling at the frequencies recommended in that guidance in future work planned. • Future documents should include a comparison to migration to groundwater cleanup levels, as well as other applicable cleanup levels. Migration to groundwater cleanup levels can help assess the potential for offsite migration, particularly for those compounds not addressed by Method One criteria. • Chain of custody (COC) documentation found after the second cover page for Exhibit F as well as that found after Test America’s report for sample delivery group 580-50586-1 appears to be incomplete COC documentation as there are no relinquished by signature as is required for legally defensible COC documentation. However, the full COC documentation is provided elsewhere (within the respective data packages on different COC forms). Please confirm that the text is correct in stating that a third party sampler was used to collect the samples and the samples were not simply received by Arctic Fox as is suggested by the Arctic Fox COCs. • Organization of information in the Appendices is confusing as the Table of Contents uses both the terms Appendices and Exhibits. Also, the Table of Contents states that the Conceptual Site Model (CSM) can be found in Exhibit D but there is only part of the required CSM documentation is found in Exhibit D whereas Appendix C of Exhibit A contains another CSM with a full human health CSM but no Ecological CSM. There is also no CSM discussion within the text of the document. • The report is not clear as to whether the material stockpiled and sampled from the eastern third of the excavation was used as backfill or not. There is no information about the final disposition of that material. Once that information is clearly communicated in writing, ADEC will complete its review of the site status. | Keather McLoone |
| 12/16/2015 | Update or Other Action | Date of revised 2015 Site Characterization Report, Kuparuk Construction Services Pad Northeast Corner report. Previous comments seem adequately addressed in the revision; however, a request will be submitted for a revised checklists as one was submitted for two data package which will hopefully also help clarify the sampling party information to support the impartial third party requirement. | Keather McLoone |
| 1/19/2016 | Exposure Tracking Model Ranking | A new updated ranking with ETM has been completed for source area 79761 ConocoPhillips Kuparuk KCS Pad. | Keather McLoone |
| 2/9/2016 | Meeting or Teleconference Held | McLoone and Kusche met with Conoco and their consultant regarding comment letter sent in response to revised Conoco KCS NE Pad report and related issues. Conoco may submit additional rationale for request for a change in site status. | Keather McLoone |
| 2/23/2016 | Update or Other Action | ADEC receives additional sampling information relating to site vertical characterization. This information was in response to ADEC's 1/20/2016 letter. | Kara Kusche |
| 4/13/2016 | Cleanup Complete Determination Issued | The Alaska Department of Environmental Conservation, Contaminated Sites Program (ADEC) has completed a review of the environmental records associated with ConocoPhillips Kuparuk KCS Pad site located in the Kuparuk Oilfield on the North Slope of 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 this site will be closed. No further remedial action is required. | Nathan Maxwell |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| DRO | > Method 1 (Arctic only) | Soil | All remaining contamination is below approved cleanup levels. |
Control Type
| Type | Details |
|---|---|
| No ICs Required |
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) |
No associated sites were found.