On March 15, 2004, a fire broke out at the Thermo Fluids oil recycling facility in
Portland, Oregon. The fire resulted in the release of approximately 1,000 gallons
of used motor oil, 700 gallons of sulfuric acid and 100 gallons of sodium hydroxide
into Johnson Creek, a tributary to the Willamette River. The release of oil and acid
resulted in extensive injury to fish and other aquatic resources.

Survey crews recovered 1,873 dead fish, including 57 lampreys and 5 steelhead.
Several species of waterfowl and semi-aquatic mammals that inhabit
Johnson Creek also may have been directly or indirectly impacted by the spill.