Lower Columbia River Backwater Reconaissance Survey

These samples were intended to expand the data base of the original reconnaissance survey reported in Tetra Tech (1993). Station latitude and longitude were recorded from geographic coordinates provided by a Magnavox MX 2000 Global Positioning System (GPS) Navigator System receiver.

The GPS locational information was not corrected for the U.S. Department of Defense's Selective Availability, and therefore the GPS latitudes and longitudes provided are accurate to approximately 100 m. The area of study was Lower Columbia River - Bonneville Dam to river mouth. Target analytes included 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, 59 semi-volatile organic compounds (SVOCs) including 11 phenolic compounds and 17 polynuclear aromatic hydrocarbons, 26 pesticides, 6 PCB Aroclors, 3 butyltin compounds including tributyltin, and 8 long-lived radionuclides.