tailieunhanh - Selected Elements and Organic Chemicals in Streambed Sediment in the Salem Area, Oregon, 1999

Analysis of streambed sediments in the Salem, Oregon, area showed anomalously large concentrations of some elements and organic chemicals, indicating contamination from anthropogenic and/or geologic sources. The streambed sediment sample from Clark Creek, an urban basin, had large concentrations of polycyclic aromatic hyrdocarbons (PAHs), organochlorines, cadmium, lead, and zinc. The sample from the East Fork of Pringle Creek, which is a mostly urban basin, had the highest concentrations of DDD, DDE, and DDT compounds. Aldrin was detected in streambed sediment at only one site, the East Fork of Pringle Creek. Ten of the 14 sites sampled had exceedances of. | . Department of the Interior . Geological Survey Selected Elements and lySGS science for a changing world Organic Chemicals in Streambed Sediment in the Salem Area Oregon 1999 Water-Resources Investigations Report 02-4194 Prepared in cooperation with the City of Salem COVER PHOTOGRAPHS Left Gibson Creek near mouth looking north. Upper Glenn Creek upstream from Gibson Creek looking north. Lower Mill Creek upstream from Mill Race looking east. . Department of the Interior . Geological Survey Selected Elements and Organic Chemicals in Streambed Sediment in the Salem Area Oregon 1999 By DWIGHT Q. TANNER Water-Resources Investigations Report 02-4194 Prepared in cooperation with The City of Salem Portland Oregon .