Site Report: Alyeska OMS 135-2
| Site Name: | Alyeska OMS 135-2 |
|---|---|
| Address: | Mile 406 Dalton Highway, Mile 12 of haul road, Deadhorse, AK 99734 |
| File Number: | 330.38.029 |
| Hazard ID: | 1971 |
| Status: | Cleanup Complete |
| Staff: | No Longer Assigned, 9074655229 dec.icunit@alaska.gov |
| Latitude: | 70.061333 |
| Longitude: | -148.572156 |
| 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
This site may contain multiple source areas within 12 to 14 acres. Mid summer 1993, It was reported that a buried 40 foot tanker trailer was partially unburied during gravel removal. The tanker was said to be damaged and started to leak diesel fuel. Site was reportedly covered up. On October 7, 1993, diesel contaminated gravel found at the material site. Cathy Girard, ADEC, sampled the material site in October 1993.Samples indicate a limited extent of diesel range organics (DRO) contamination ranging up to 2,250 milligrams per kilogram (mg/kg) total petroleum hydrocarbons (TPH). Sampling was conducted in response to visual staining and odor observed during gravel mining by Alaska Police Standards Council (APSC). Program Logistic Management Plan (PLMP) 12. This was a joint gravel pit utilized until 1982. The gravel pit was used to construct the Dalton Highway and the TAPS by Department of Transportation (DOT) and Alyeska and administered by Department of Natural Resources (DNR). A major channel of the Sag River- 150 yards wide - separates the access road terminus from the historic permitted gravel pit area. Cross reference Prevention and Emergency Response Program (PERP) file number 330.02.109. DNR has serialized the site as ADL420325
Action Information
| Action Date | Action | Description | DEC Staff |
|---|---|---|---|
| 8/1/1993 | Update or Other Action | The buried tanker car was allegedly discovered sometime during the summer of 1993 and soil samples were collected; exact date is unknown. The samples, collected in plastic bottles and analyzed a year later,contained "Hydrocarbons"(assumed TPH) up to 359 mg/kg. This data is considered biased low screening data due to the plastic container the samples were stored in and the length of time between collection and analysis (i.e. 1 year). | Grant Lidren |
| 10/7/1993 | Update or Other Action | During mining of gravel on this date by APSC, a 100 by 100 foot area of petroleum contaminated gravel was discovered evident by visual staining and odor. | Grant Lidren |
| 10/10/1993 | Update or Other Action | Eight soil samples collected at 135-2 contained TPH up to 2,250 mg/kg | Grant Lidren |
| 5/6/1994 | Update or Other Action | An SOA memo on this date indicates, "The area of contamination lies within the middle of the gravel pit. The Sag River covers the area most months of the year, but gravel would be accesseble sometime between July and October." | Grant Lidren |
| 7/18/1995 | Update or Other Action | A letter from BLM to ADEC on this date states. "...during routine extraction of the subject site for gravel, the heavy equipment involved had partially unearthed a tanker truck (approximately 40 feet in length). In so doing, the body of the tanker was ruptured and fluid started leaking out. The fluid was reportedly diesel fuel. The workers on site picked up the pieces of metal ripped from the body of the tanker and elected to cover it back up rather than report it." | Grant Lidren |
| 8/28/1995 | Update or Other Action | A letter from the Joint Pipeline Office (JPO) to the ADEC on this date states, "The [JPO] received a concerned employee report on the subject site alleging a buried tank-trailer at the site was uncovered during mining operations causing the tanker to leak what appeared to be diesel fuel." | Grant Lidren |
| 10/26/1995 | Update or Other Action | (Old R:Base Action Code = RPL3 - RP Determined and Action Request). DNR/Joint Pipeline Office contacted ADEC to determine how to prioritize this site. DNR is the landowner of this joint use pit utilized by ADOT and Alyeska. As a result of this request, a letter was sent to DNR requesting additional action at this site. | Scott Rose |
| 11/21/1995 | Site Added to Database | Diesel contamination. | Scott Rose |
| 1/29/2008 | Exposure Tracking Model Ranking | Initial ETM ranking completed. | Keather McLoone |
| 4/3/2008 | Update or Other Action | Email to Gary Schultz (ADNR) to inquire if the presence or absence of the truck was ever confirmed as requested in DEC memo to JPO in 1995, 1996, and 1997. Restricted information in other agency's file and multiple PRPs appear to have stalled progress at this site. MOA in 1998 and memo from ADNR offering to assist DEC in site assessment. No more recent information in file. Reply on 04/09/08 stating that neither Gary nor Leon Lynch of DNR have any information but offer to conduct a site visit this summer either for ADEC or jointly (they may also contact Cathy Girard, if possible). | Keather McLoone |
| 6/30/2014 | Site Visit | Performed a site visit on this date 12 miles south of Deadhorse at mile 403 of the Dalton Highway. The mining site was not accessible due to the Sag River. There was no discernible evidence of the reported historic truck rollover. However, a soil stain was observed within the pullout adjacent to the Dalton Highway (west of the Sag River) during the 2014 site visit. This stain is most likey the result of a previous leaking vehicle. Pictures taken. | Grant Lidren |
| 7/16/2019 | Document, Report, or Work plan Review - other | On this date, ADEC approved the OMS 135-2 Reconnaissance Work Plan submitted by SLR. The site will be accessed by air boat. | Grant Lidren |
| 10/22/2019 | Site Characterization Report Approved | On this date, ADEC received the OMS 135-2 Reconnaissance Report submitted by SLR and dated October 22, 2019. In 2019, an aerial inspection of the site was conducted by helicopter. The site gravel bar was surrounded by the Sagavanirktok River; no debris or soil staining were observed. During the ground survey, it was evident the surface soil has been scoured from high water levels. A magnetometer (metal detector) survey conducted revealed a yellow pin flag 6 inches below ground surface, but no other anomalies were noted. Soil field screened from 21 surface soil locations on the north side of the gravel bar, at the assumed area of the site and adjacent to the yellow pin flag, contained photo ionization detector (pid) readings from 0.0 parts per million (ppm) to 0.1 ppm. | Grant Lidren |
| 1/23/2020 | Cleanup Complete Determination Issued | The Alaska Department of Environmental Conservation, Contaminated Sites Program (ADEC) has completed a review of the environmental records associated with the Alyeska OMS 135-2 located at milepost 406 of the Dalton Highway. 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 unless new information becomes available that indicates residual contamination poses an unacceptable risk. | Grant Lidren |
Contaminant Information
| Name | Level Description | Media | Comments |
|---|---|---|---|
| DRO | Other | Soil |
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.