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Site Report: ARRC Ship Creek Rail Yard Seep


Site Name: ARRC Ship Creek Rail Yard Seep
Address: Whitney Road & A Streets, Anchorage, AK 99501
File Number: 2100.38.033
Hazard ID: 172
Status: Active
Staff: Grant Lidren, 9072698685 grant.lidren@alaska.gov
Latitude: 61.224671
Longitude: -149.883425
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

In 1986, a petroleum sheen was noted from a seep, upriver of storm drain outfall 5, discharging into Ship Creek. A failed water separator was known to contribute to the contamination. The seep area and stormdrain outfall 5 are downgradient from the ARRC rail yard. The ARRC rail yard is covered with numerous tracks and maintenance related shops and general repair buildings. The track and yard areas are used for through traffic, assembling railroad cars into trains, fueling activites, and for storage and handling of freight and maintenance of rolling stock. In 1989, water and soil samples collected contained petroleum contamination. Some contaminated soil was removed/transported to Alaska Soil Recycling (ASR) and some free product was recovered. Additionally, a collection gallery was installed with a total length of 86 feet and orientated in an east to west direction. The gallery is composed of 36 inch diameter CMP with a vertical manhole recovery point in the center. Reportedly, absorbent boom is kept in the pipe as a passive recovery measure. The collection gallery is located just south of the railroad tracks and east of the A Street Bridge. In 2007, the Environmental Protection Agency (EPA) Anchorage Terminal Reserve Investigations performed indicated contamination remains at this site, which is located within Groundwater Area 6. In 2018, petroleum sheen was observed flowing into ship creek from outfall #6.

Action Information

Action Date Action Description DEC Staff
10/13/1989 Update or Other Action (Old R:Base Action Code = SI - Site Investigation). On this date, Shannon and Wilson submitted an monitoring wells and oil collection gallery Ship Creek Railroad Yard report dated August 1989. The 15 new wells didn't identify any new areas where ground was badly contaminated other that already identified.Groundwater Contamination up to 18.9 mg/L benzene, 40.9 mg/L ethylbenzene, and 9.79 mg/L toluene. Boring B-9 has consistently had a floating product layer. Additionally, a collection gallery was installed with a total length of 86 feet and orientated in an east to west direction. The gallery is composed of 36 inch diameter CMP with a vertical manhole recovery point in the center. Reportedly, absorbent boom is kept in the pipe as a passive recovery measure. The collection gallery is located just south of the railroad tracks and east of the A Street Bridge. No Longer Assigned
1/29/1991 Site Added to Database Petroleum contaminant. No Longer Assigned
3/7/2008 Exposure Tracking Model Ranking Initial ranking with ETM completed. Grant Lidren
3/4/2011 Update or Other Action ADEC Received an APDES ARRC Ship Creek Railyard Inspection Report from ADEC Division of Water Dated 12/8/2010. As part of this report (which contained information for all the storm drains in the Railyard area) outfall 5, discharging from Area A, was inspected and sampled for TAqH, Oil & Grease, and BTEX (TAH). All analytical surface water samples from the outfall were non-detect. The visual inspection of the storm drain indicated the discharge water was heated indicated by steam and a slight diesel odor was detected. However, it was noted that the diesel odor could be attributed to vehicular traffic on Whitney Road. Grant Lidren
4/10/2018 Update or Other Action On this date, leaking rail yard equipment caused an estimated 10 gallons of oil to enter storm water drains leading to Ship Creek. Intermittent sheen was visible from Drain #6 out to the mouth of Ship Creek. Mitigation measures put in place following spill. PPRP closed case with no further action on 5/11/2018(Spill# 18239910001. Grant Lidren

Contaminant Information

Name Level Description Media Comments

Control Type

Type Details

Requirements

Description Details

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