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Site Report: ARRC Seward Rail Yard


Site Name: ARRC Seward Rail Yard
Address: Seward Hwy., Seward, AK 99664
File Number: 2332.38.002
Hazard ID: 1529
Status: Cleanup Complete - Institutional Controls
Staff: IC Unit, 9074655229 dec.icunit@alaska.gov
Latitude: 60.130204
Longitude: -149.427204
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.

Problems/Comments

During the closure of two 10,000 gallon heating oil UST, diesel range organic (DRO) contamination was encountered.

Action Information

Action Date Action Description DEC Staff
1/15/1993 Update or Other Action Final Report 1992 Activities Underground Storage Tank Removals and Site Characterization, Seward, submitted by ENSR and recieved by The ADEC on this date. Two 10,000 gallon heating oil tanks( T1 & T2) were removed. The T1 excavation extended approximately 43 ft. by 17 ft. by 9.5 ft. bgs. no ground water was encountered. Approximately 100 cubic yards of soil was removed. The excavation was not expanded to remove suspected contaminants due to proximity of loading dock wall. DRO levels up to 583 mg/kg were found at the depths of the excavation. The T2 excavation extended approximately 27 ft. by 44 ft. by 8.5 ft. groundwater(with a sheen) was encountered at 7 ft. bgs. Petroleum impacted soil was encountered throughout the investigation. 314 cubic yards of contaminated soil was removed from the excavation. A soil sample at 10.5 feet bgs indicate DRO up to 7,500 mg/kg at the depths of the excavation. DRO was detected at 36 mg/L in the groundwater sample collected from the depths of the excavation. Groundwater was found to not be effected by tidal fluctuations Grant Lidren
8/16/1993 Update or Other Action (Old R:Base Action Code = SA1R - Phase I SA Review (CS/LUST)). No Longer Assigned
8/16/1993 Update or Other Action (Old R:Base Action Code = SA2R - Phase II SA Review (CS)). No Longer Assigned
11/26/1993 Site Added to Database Heating oil USTs. No Longer Assigned
11/26/1993 Site Ranked Using the AHRM Initial ranking. No Longer Assigned
9/18/1995 Update or Other Action (Old R:Base Action Code = RAU - Remedial Actions Underway (General)). Remedial action underway. Action date taken from KDO excel spreadsheet. Monica English
11/24/1999 Update or Other Action Sent letter to AKRR, Susan Schrader, requesting either reports/data that remaining soil and GW contamination has been addressed; or time table for site assessments and remediation of soil and GW exceeding ADEC cleanup levels. Donald Seagren
1/15/2004 Update or Other Action Assigned file number and entered into the Fileroom DB and CS DB. Alyce Hughey
5/17/2004 Update or Other Action No response ever received from AKRR to 11/24/99 letter. Coordinating with Section Manger on single point of contact for AKRR sites in hopes of getting movement on outstanding issue. Donald Seagren
3/27/2007 Exposure Tracking Model Ranking Initial ranking Bill O'Connell
5/9/2008 Update or Other Action Talked with the City of Seward drinking water division. They indicated that the nearest drinking water well is located a 1/2 mile from site. Grant Lidren
6/26/2008 Site Characterization Workplan Approved Work Plan for Phase 2 Soil adn Groundwater Investigation Seward Roundhouse, submitted by Clarus Grant Lidren
3/24/2009 Report or Workplan Review - Other On 3/24/09, the ADEC reviewed the Phase 2 Soil and Groundwater Investigation Report Seward Roundhouse, submitted by Clarus, dated March 18th 2009. On 7/2/08 one soil boring was advanced 50 feet north of the former roundhouse in the former 10,000 gallon UST location. A soil sample collected at the GW interface at 8.5 ft. bgs contained 1,250 mg/kg DRO. A groundwater sample collected 1 foot from the soil boring location contained 0.756 mg/L DRO. Grant Lidren
4/22/2009 Cleanup Complete Determination Issued The Alaska Department of Environmental Conservation (ADEC), Contaminated Sites Program, has completed a review of the environmental records associated with the ARRC Seward Rail Yard. Based on the information provided to date, the ADEC has 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. Grant Lidren
4/22/2009 Institutional Control Record Established Institutional Controls established and entered into the database. There is contamination remaining above established cleanup levels at the ARRC Seward Rail Yard, but ADEC has determined there is no unacceptable risk to human health or the environment, and this site has been granted a Cleanup Complete- Institutional Controls Determination subject to the following: 1. Any future change in land use may impact the exposure assumptions cited in this document. If land use and/or ownership changes, current institutional controls may not be protective and ADEC may require additional remediation and/or institutional controls. Therefore, ARRC will report to ADEC every five years to document land use, or as soon as ARRC becomes aware of any change in land ownership and/or use. The report can be sent to the local ADEC office or electronically to DEC.ICUnit@alaska.gov 2. A Notice of Environmental Contamination will be recorded on the ADEC database to document that there is residual contamination remaining on site above the most stringent ADEC cleanup levels. 3. Any proposal to transport soil or groundwater off site requires ADEC approval in accordance with 18 AAC 75.325(i). A “site” [as defined by 18 AAC 75.990 (115)] means an area that is contaminated, including areas contaminated by the migration of hazardous substances from a source area, regardless of property ownership. (See attached site figure.) 4. Movement or use of potentially contaminated soil in a manner that results in a violation of 18 AAC 70 water quality standards is unlawful. 5. The soil contamination located under the asphalt at the T1 location and near the railroad tracks at the T2 location is currently inaccessible (see attachment B). When the soil becomes accessible, the soil must be evaluated and contamination addressed in accordance with an ADEC approved work plan. 6. The ADEC recommends that the 2-tier PVC gallery at the T2 excavation be decommissioned. 7. Groundwater wells may not be installed on site without ADEC approval. Grant Lidren
4/22/2009 Update or Other Action On this date, ADEC received a signed CC-IC agreement from ARRC Grant Lidren
6/13/2012 Update or Other Action Staff changed from Grant Lidren to IC Unit. Kristin Brown
7/9/2012 Institutional Control Compliance Review IC review conducted and additional details added to reminder system. Will follow up with responsible party regarding land use in 2014. Evonne Reese
4/24/2014 Institutional Control Update Responsible party reported no changes in land use or ownership in regards to former underground storage tank 1 (T1) and tank 2 (T2) locations. Reminder system set to follow-up again in 2019. Kristin Brown

Contaminant Information

Name Level Description Media Comments
DRO Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil

Control Type

Type Details
Other

Requirements

Description Details
Advance approval required to transport soil or groundwater off-site.
Groundwater Use Restrictions

Missing Location Data

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