Survey of Chemical Contaminants in Seafoods Collected in the Vicinity of Tyonek, Seldovia, Port Graham and Nanwalek in Cook Inlet, Alaska

摘要

These data were collected by EPA Office of Water (OW), Office of Science and Technology with assistance from Port Graham and Nanwalek Tribal residents and professional staff. Field sampling was conducted between June 5 and July 24, 1997. This report is a summary of the data only. For chemical concentrations which were detected, the average, maximum and minimum values are presented. A total of 81 tissue samples comprised of seven fish species, eight invertebrates and three plant species were sampled and analyzed for concentration of 161 chemicals. These results provide a good survey data set for environmental chemicals presented in uncooked, whole body tissues samples of these Cook Inlet biota. There were detections of global contaminants: mercury, organochlorine pesticides, and PCB congeners. On the other hand, there was minimal detection of another ubiquitous contaminant group, dioxins and furans. In the 81 tissue samples analyzed for dioxin and furan congeners, only one type of dioxin, OCDD, was detected in one duplicate chinook salmon sample (13 ppt). Detectable concentrations of dioxins and furans were not found in other Cook Inlet tissue samples. The detection of many individual PAH compounds in the Cook Inlet tissue samples may have resulted from the use of very sensitive methods. Approximately one-half of the 104 individual PAHs were detected in fish, invertebrate and plant samples. Chinook tissues samples had the highest total average PAH concentration (253 ppb).