image:filtered light in the forest

Toxics Cleanup Program

Lower Duwamish Waterway
Source Control Investigation

Boeing Plant 2 to Jorgensen Forge
Early Action Area 4 

Site Background Please click on map for larger view of the Duwamish Waterway.

Early Action Area 4 was identified as an area requiring sediment cleanup based on work conducted for the Lower Duwamish Waterway (LDW) Superfund site. This area is located along the eastern bank of the LDW from Slip 4 to the south side of the Jorgensen Forge property.  The map shows the location of Early Action Area 4 and the properties located within the area that drains to this area.

The sediments in Early Action Area 4 were contaminated from a variety of sources, both historical and potentially ongoing.  Based on the results of sediment sampling, the following chemicals are potential contaminants of concern in Early Action Area 4:

  • PCBs
  • Phthalates
  • PAHs (polynuclear aromatic hydrocarbons)
  • Metals

There are two properties adjacent to the Early Action Area 4, Boeing Plant 2 and Jorgensen Forge.

Boeing Plant 2 Boeing Plant 2 - please click on photo for larger size

Plant 2 was built on farmland in the 1930’s.  Since 1936, Boeing has manufactured airplane parts at Plant 2.  This manufacturing process involves many hazardous chemicals including: heavy metals, cyanide, mineral acids and bases, petroleum products, PCBs, and chlorinate solvents.  In recent years, activities at Plant 2 have shifted toward research and administration, however some limited manufacturing still continues at this site. 

There is contaminated soil, groundwater, and sediment in the Duwamish Waterway adjacent to Plant 2. The site poses potential risk to the health of people, fish, wildlife, and the environment.

The Boeing Company is investigating and cleaning up hazardous waste contamination at Plant 2 under EPA’s Resource Conservation and Recovery Act (RCRA).  More information on Boeing Plant 2 can be found on EPA’s website:

Jorgensen Forge

The Jorgensen Forge site is bordered to the north by Boeing Plant 2, to the east by East Marginal Way South, and to the south by the Boeing Isaacson property.  The site consists of approximately 21.6 acres in an industrial area.

Jorgensen manufactures specialized open die steel forgings and rolled aluminum rings.  In addition to steel and aluminum, Jorgensen also processes nickel, titanium, and specialized alloys.

Click here for more information on the Jorgensen Forge site.

Source Control Action Plan

Ecology developed a Source Control Action Plan for Early Action Area 4 which describes what source control actions are necessary.  As part of the Source Control Action Plan, Ecology hired a contractor to put together a Summary of Existing Information and Data Gaps report.