SEATTLE (AP) -
In Puget Sound, pollution is forever. That's the message scientists hope residents of Western Washington will remember the next time they flush chemicals down their toilets or curbside drains.
Because the sound is shallow at the northern end like a bathtub, ocean water does not easily come in to flush out pollutants, state scientists told about 400 people at a one-day scientific conference on toxins in the sound. The gathering was organized by People for Puget Sound.
Because of the sound's geography, polychlorinated biphenyls or PCBs are still being found in Chinook salmon caught in its waters, at levels up to six times higher than fish from the Columbia and Sacramento rivers and along the east side of Vancouver Island. PCBs have been banned since the 1970s.
more...
http://www.lasvegassun.com/sunbin/stories/tech/2006/apr/07/040700629.html