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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 24. Oil and grease detected in stormwater runoff, Columbia River Basin, Washington and Oregon, 2009–10.


[Station names are shown in table 3. Concentrations are in milligrams per liter. Abbreviations: –, not detected; E, estimated]


Short name Date Time Reporting

limit
Concentration

in sample
Concentration

in method blank
Wenatchee 12-21-09 1340 5.0
Richland 05-02-09 1200 5.0 E 4.4 E 1.5
Umatilla 10-04-09 0920 5.0 E 4.4 E 2.4
The Dalles 02-23-09 1210 5.0 E 3.5 E 2.1
Hood River 02-23-09 1310 5.0 E 4.1 E 2.1
Portland1 10-14-09 1100 5.0 E 4.8 E 2.3
Vancouver1 12-16-09 1340 5.0 E 2.3
Vancouver2 12-16-09 1210 5.0 E 3.3
Portland2 10-26-09 1210 5.0 E 3.6
Willamette1 06-04-10 0840 4.7 E 4.0 E 3.4
Willamette2–Dec 12-15-09 1330 5.0 5.6
Willamette2–May 05-26-10 1310 5.4 6.7 E 3.6
Willamette3 12-15-09 1310 5.0
Willamette4 05-26-10 1410 5.5 4.1
St Helens 03-30-10 1310 4.7 E 2.5 E 1.7
Longview 03-30-10 1410 4.7 E 2.5 E 1.7

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
http://or.water.usgs.gov

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