  |
|
|
Spokane
River Toxics Reduction Strategy
Studies of Spokane River Contaminants
FAQs and Focus Sheet
Accidental spills of dangerous materials and past business practices have contaminated land and water throughout the state. The Toxics Cleanup Program works to remedy these situations, which range from cleaning up contamination from leaking underground storage tanks, to large, complex projects requiring engineered solutions.
The Trentwood site is located at 15000 East Euclid in the Spokane Valley. The site lies along the north bank of the Spokane River over the Spokane Valley-Rathdrum Prairie Aquifer.
Contamination from past and present aluminum production has impacted soil and groundwater. There are three areas of groundwater contamination called plumes. The larger plume contains PCBs. Two other plumes are being contained with current cleanup measures. These plumes contain total petroleum hydrocarbons (TPH), mostly diesel and heavy oil along with PCBs. Carcinogenic polycyclic aromatic hydrocarbons (cPAHs) and metals are also in the petroleum plumes.
Soil contamination in certain areas at the site contain PCBs, diesel and heavy oil, gasoline, cPAHs and metals (arsenic, chromium, lead, iron and manganese).
Kaiser’s proposed cleanup remedies are available for public comment:
Public Comment Period January 05, 2012-March 06, 2012
Ecology News Release -
Kaiser
Trentwood Cleanup Documents Available for Public Comment 01/03/2012PCB Projects:
Heavy Metals Projects – map of the following:
Heavy Metals Projects – map of the following:
Copyright © Washington State Department of Ecology. See http://www.ecy.wa.gov/copyright.html.
