Reconaissance Survey of the lower Columbia River

Samples were shipped on ice to laboratory. Sample chain-of-custody procedures were followed. Target analytes were seventeen dioxin and furan congeners, 7 PCB Aroclors, 16 metals and trace elements (Al, Sb, As, Ba, Be, Cd, Cr, Cu, Fe, Pb, Hg, Ni, Se, Ag, Tl, Zn), cyanide, 52 semi-volatile organic compounds (SVOCs) including 11 phenolic compounds and 15 polynuclear aromatic hydrocarbons, 28 pesticides, 7 PCB Aroclors, 3 butyltin compounds including tributyltin, and 7 long-lived radionuclides.

Conventional analyses included sediment grain size and total organic carbon content. All data are reported on a dry weight basis. Analytical techniques included Dioxins and furans (EPA Method 1613 with modifications); PCB Aroclors (EPA Method 8080); metals and trace elements [Ag, Al, Ba, Cu, Cr, Fe, Ni, Sb, Tl, and Zn by ICP (EPA Method 200.7); As (EPA 7060), Be (EPA 7091), Cd (EPA 7131), Pb (EPA 7421), and Se (EPA 7740) by GFAA; Hg (EPA 7471) by CVAA)]; cyanide [colorimetry (EPA 9010)]; SVOCs (EPA 8270); pesticides and PCBs (EPA 8080), Butyltins (GC/MS with SIM); radionuclides by alpha spectroscopy and gamma counting.

The information for this metadata was taken from the Columbia River Basin: Sediment Database Abstracts.