Oregonian report: Contamination still high at Northwest Natural's Portland harbor site, EPA says

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The Oregonian's Scott Learn reported on Sean Sheldrake's memo regarding the EPA agreement with NW Natural and Siltronic for cleanup of the Gasco site.
"For one key carcinogen, polycyclic aromatic hydrocarbons, the river pollution is the highest measured in the Superfund site and up to 100 times above guidelines for river sediment, Sheldrake's memo says."
"The new cleanup work likely will include sediment dredging and disposal -- the most expensive option -- and run five to 10 times the scale of the 2005 work, Sheldrake said."
See the complete article at
Sheldrake's memo can be viewed at
Removal action documents are posted at