Average A. ΣPAH and B. ΣBaPeq, in tail and viscera tissue from crayfish collected in the Willamette River in Portland, Oregon (n=3) in 2013. Crayfish were collected upriver (RM 18.5), within (RM 12E, 11E, and 3.5W), and downriver (RM 1NW) of the Portland Harbor Superfund Megasite. Three composited samples of each tissue were analyzed from each river mile. All tissue concentrations are in ng/g wet weight.