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Lower Duwamish Waterway Source Control Investigation

8801 East Marginal Way South Site (a.k.a. Kenworth Truck Co. Site)

Site Location

This site is located at 8801 East Marginal Way South, in Tukwila, Washington on the east bank of the Lower Duwamish Waterway.  The site includes the upland area and the sediments in the Lower Duwamish Waterway next to the upland area.  The upland area is bordered to the north by property owned by The Boeing Company, to the south by property owned by Container Properties, LLC (formerly the Rhone-Poulenc site) and the Museum of Flight Foundation, to the east by East Marginal Way South and to the west by the Lower Duwamish Waterway.

Site Background

The upland area of the 8801 East Marginal Way South site is about 25 acres covered with paved or concrete surfaces and buildings.  This property is zoned for industrial activities.  In 1929, Fisher Body Corporation built the main manufacturing building.  During World War II, the property was used to make trucks and airplane assemblies.  In 1946 Kenworth Motor Truck Corporation, a PACCAR Inc (PACCAR) subsidiary, bought the northern two thirds of the property.  In 1966, PACCAR bought what is now the southern third of the property from the Monsanto Company.  PACCAR built trucks on site from 1946 until 2002 when it decommissioned the facility.  Merrill Creek Holdings, LLC bought the entire property in 2004.  Currently the property is leased to Insurance Auto Auctions, Inc. of Westchester, Illinois which auctions damaged vehicles.   

Contamination

Contamination on the upland portion of this site is attributed to heavy industrial use since the 1920s. Soil or groundwater on the upland portion of this site is contaminated with:

• Petroleum hydrocarbons.
• Poly-aromatic hydrocarbons (PAHs).
• Volatile and semi volatile organic compounds (VOCs and SVOCs).
• Polychlorinated biphenyls (PCBs).
• Metals (primarily chromium, copper, lead, nickel and zinc).

Previous Work

In 2004 PACCAR Inc. moved out of Ecology’s Voluntary Cleanup Program to negotiate a formal legal agreement with Ecology for site cleanup.  A sediment evaluation needed to be done to define the extent of contamination.  In 2006, Ecology and PACCAR Inc. signed an Agreed Order to do a Sediment Evaluation Work Plan (SEWP).  PACCAR did several remediation tasks including groundwater monitoring, soil and underground storage tank removal and excavation, and soil and groundwater sparging treatment to remove volatile organic compounds.  Insurance Auto Auctions, Inc. also installed storm water quality improvements.  

Agreed Order

Ecology has negotiated with PACCAR Inc and Merrill Creek Holdings LLC, the potentially liable parties (PLPs) for a second Agreed Order to address the upland area of the site.  Under this Agreed Order, the PLPs will update and implement an Interim Action Work Plan for the upland portion of the site.  The Draft Interim Action Work Plan summarizes past investigations, identifies contaminants of concern, areas of concern, and data gaps, evaluates feasible cleanup alternatives, and outlines a plan to implement these cleanup tasks for soil and groundwater at the upland area.  Under the Interim Action Work Plan, the proposed cleanup action tasks, with review and approval by Ecology will include:

• Investigate and fill remaining data gaps.
• Describe the feasible cleanup alternatives.
• Update the cleanup alternative work plan(s).
• Implement the work plan(s).

The Draft Interim Action Work Plan was prepared by PACCAR and is under review by Ecology at the same time the public is reviewing it.

State Environmental Policy Act

Under the State Environmental Policy Act, Ecology has reviewed a completed environmental checklist and other information and issued this site and this work a determination of non-significance.  This means that implementing this Interim Action Work Plan would not harm the environment but would result in an environmental benefit.

Site Documents

• October 9, 2008
• Fact Sheet
• Español/Trang tiếng Việt/中文
• Agreed Order
• Exhibit A – Site Map
• Exhibit B – Draft Interim Action Work Plan Summary
• Full Draft Interim Action Work Plan
• Exhibit C – Schedule of Work Tasks and Deliverables
• Exhibit D – Model Environmental Covenant
• Public Participation Plan
• SEPA Checklist
• SEPA Determination of Nonsignificance
• August 24, 2006
• Fact Sheet

Related Information

• More information on the Lower Duwamish Waterway
• Watershed Information WRIA #9

Additional Resources

• Glossary and acronyms used by the Toxic Cleanup Program
• Cleanup Process: Major Steps & Definitions
• Data Submittal Requirements for All Cleanup Sites
• Facility/Site Atlas
• Toxics Cleanup publications