cmings, i representhe duwamish river clnup coalition. >> smith: b. tos of the river, but this isn't your typical touri outing. it's an vironmental wakeup call. >> the epa did an inveigation he on duwamish river about ten years ago, and conclud that industrial histo here had left behind such a legacy of toc pollution that theiver was declared a feral superfund site in 2001. >> smith: superfund isne of epa's bisticks. it was the regulaty program created in 1980 clean up america's worst pollution proble. >> your typicasuperfund site used to be factory, pe, superfunsite right at the ttom of your pipe. that'sot what we have here. we have wh's called a mega- site. have a five, five and a hal le stretch of river, end to end, that'being investigated for cleaup. this is one the largest superfund sis in the country. the river was lied as a perfund site because of an accumulationa legacy of toxic llution that has built up in the mud at the botm of the rir. >> there's a direct linketween contaminatedediments in certain areas ancontamination of the food web above

: one big reason pcbs are a rsistent problem is that it takes so long to cln up places likthe duwamish riverndustri corridor. some of seate's heaviest industry settled herdecades ago, and today, it's the region's large hot spot for pcbs. >> my name is b.j.ummings, i represt the duwamish river eanup coalition. >> smith: j. cummings leads urs of the river, but this isn't your typical toust outing. it's an envinmental wakeup call. >> the epa did an investigion here oduwamish river about ten years ago, and concled that industrial hisry here had left hind such a legacy of toxic pollution that the riv was declared a feder superfund site in 2001. >> smith: superfund is onef epa's big stks. it was the regulatory ogram created in 1980 to can up erica's worst pollution problems. >> your typical surfund site used to be factory, pipe superfund si right at the bott of your pipe. that's nothat we have here. we have at's called a mega- site we have a five, five and a hf mile stretch of river, end t end, thas being investigated for cln-up. this is onof the largest superfund tes in the country. the river was