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Scientific Investigations Report 2008–5027

Scientific Investigations Report 2008–5027

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Table 2. Pesticide data-collection activities in the lower Clackamas River basin, Oregon, 2000–2005.

[For a complete list of compounds analyzed in each schedule, refer to appendix table B1. Number of samples: Excludes quality-control samples. Abbreviations: CWMG, Clackamas Watershed Management Group; SWQA, Source Water-Quality Assessment (NAWQA study); EUSE, Effects of Urbanization on Stream Ecosystems (NAWQA study); NAWQA, National Water-Quality Assessment Program; USGS, U.S. Geological Survey]

Study Years Analytical schedules Site types sampled Storm events Number of samples
Tributaries Clackamas River/source water Finished drinking water
Pesticide Study–Phase 1 (USGS/CWMG) 2000–2001 2010, 9060 X X X X 21
SWQA–Phase 1 (NAWQA) 2002–2003 2003, 2060, 1433, 2020 X 18
EUSE (NAWQA) 2003–2004 2003, 2060 X 18
SWQA–Phase 2 (NAWQA) 2004–2005 2003, 2060, 1433, 2020 X X 28
Pesticide Study–Phase 2 (USGS/CWMG) 2005 2001, 2060, 40241 X X X X 34

1 Source and finished drinking-water samples (only) also were analyzed using schedules 2002 and 2003.

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