Lower Duwamish Waterway
Source Control Investigation
Boeing Plant 2 to Jorgensen Forge
Early Action Area 4
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
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:
- PAHs (polynuclear aromatic hydrocarbons)
There are two properties adjacent to the Early Action Area 4, Boeing
Plant 2 and Jorgensen Forge.
Boeing Plant 2
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:
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
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.