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Record of Decision System (RODS)



City & State:  MARYSVILLE  WA  98270
EPA ID:  WAD980639256
EPA Region:  10
NPL Status:  Deleted from the Final NPL
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R10-96/133
ROD Date:  03/01/1996
Operable Unit(s):  02
Media:  Groundwater, surface water, soil, sediment.
Contaminant:  Acetone, naphthalene, aluminum, barium, calcium, chromium, cobalt, copper, iron, lead, magnesium, manganese, nickel, potassium, sodium, zinc, volatile organic compounds (such as benzene, toluene, and xylene), semi-volatile organic compounds (such as naphthalene, acenaphthene, and anthracene), pesticides (such as lindane and heptachlor), antimony, cyanide, ammonia, nitrogen, phenol.
Abstract:  Please note that the text in this document summarizes the Record of Decision for the purposes of facilitating searching and retrieving key text on the ROD. It is not the officially approved abstract drafted by the EPA Regional offices. Once EPA Headquarters receives the official abstract, this text will be replaced.

The Tulalip Landfill occupies approximately 147 acres and is located on a low-lying island commonly referred to as North Ebey Island. Located within the bounds of the Tulalip Indian Reservation, the landfill lies generally between Marysville and Everett, Washington. The Tulalip Tribes of Washington is a federally recognized Indian Tribe. The Tribes established the Tulalip Section 17 Corporation which is the trust beneficiary of the western parcel. In 1964, the Tulalip Section 17 Corporation leased the landfill site to the Seattle Disposal Company (SDC) for a period of 10 years. A second lease was executed in 1972. From 1964 to 1979, SDC operated the landfill, then known as the Big Flats Landfill. The leases allowed specified waste disposal and related activities for a Isanitary landfill operation and required a final cleanup of the site. Between 1964 and 1979, it is reported that approximately 3-4 million tons of mixed commercial and industrial waste was deposited in the landfill. In 1979, the landfill was closed because of ongoing environmental problems. Landfill closure activities were not constructed according to plan and this resulted in poor drainage and other problems.Improper use of the landfill is thought to be the source of contamination at the site. Poor performance of landfill closure activities added to the problems. In 1985, the Tulalip Tribes of Washington sought to place a thicker soil cap over the landfill to address ongoing leachate discharges at the site. The site was placed on the National Priorities List (NPL) in 1995.
Remedy:  The selected remedy is expected to stem the migration of contaminants from the landfill into the surrounding estuary and to allow productive use of the landfill surface, with restrictions to prevent damage to the cover system.The major components of the selected remedy include: capping the landfill; installing a landfill gas collection system and a gas treatment system if necessary; monitoring the leachate mound within the landfill, the perimeter leachate seeps, and landfill gas; restrictions to protect the landfill cap; and providing for operation and maintenance to ensure the integrity of the cap system.
Text:  View full-text ROD [ 463K ]
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