Hazardous materials response teams from Puget Sound Fire and Tukwila Fire responded to a report of a possible leak of an unknown substance in the Green River at 1:53 p.m. Tuesday.
When firefighters arrived at the South 196th Street overpass, they could see a sheen of something on the surface of the river, according to a Puget Sound Fire media release. They quickly set out two sets of absorbent booms across the river; one at the bridge and one further downstream where the river runs through the city of Tukwila, to stop the movement of the material.
Firefighters and Guardian 1, the King County Sheriff’s Office helicopter, were unable to locate the source as they traveled along the river levee.
Initial testing of the material showed it to be petroleum based.
The investigation and removal of the material was turned over to the state Department of Ecology once the flow of the substance was stopped.