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Scientific Investigations Report 2012–5068

Reconnaissance of Contaminants in Selected Wastewater-Treatment-Plant Effluent and Stormwater Runoff Entering the Columbia River, Columbia River Basin, Washington and Oregon, 2008–10

Table 5. Summary of quality-control (QC) analyses performed for this study, Columbia River Basin, Washington and Oregon, 2008–10.

[Station names are shown in tables 2 and 3.]

City or short name Date Type of quality-control sample Suspended sediment Anthro-pogenic organic compounds in unfiltered water Pharmaceuticals in filtered water Halogenated compounds on solids filtered from samples Currently used pesticides in filtered water Mercury and methyl-mercury in unfiltered water Polycyclic aromatic hydrocarbons in unfiltered water Trace elements in unfiltered and filtered water Oil and grease in unfiltered water
Wastewater-treatment-plant effluent samples
2008 visit to initial seven cities
Umatilla 12-03-08 Blank X X X X1
Vancouver 12-08-08 Replicate X X X X
2009 revisit and additional cities
Umatilla 12-02-09 Blank   X
Vancouver 12-02-09 Replicate   X X
St Helens 12-03-09 Replicate X X X X X X
Stormwater-runoff samples
2009 and 2010 storms
Wenatchee 12-21-09 Replicate X   X X X X X X
The Dalles 02-23-09 Blank X   X   X X X
Portland2 10-26-09 Replicate X   X X   X X X
Willamette1 06-07-10 Blank X   X X X X X X

1 Filter papers were analyzed instead of a field blank for this method.

First posted April 25, 2012

For additional information contact:
Director, Oregon Water Science Center
U.S. Geological Survey
2130 SW 5th Avenue
Portland, Oregon 97201

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