USGS Evaluation of Sources of Nitrate Beneath Food Processing Wastewater-Application Sites near Umatilla, Oregon

Scientific Investigations Report 2009-5069

Evaluation of Sources of Nitrate Beneath Food Processing Wastewater-Application Sites near Umatilla, Oregon

Figure - refer to figure caption for alternative text description

Figure 8. Trilinear diagram showing cations for North Farm site water samples from wells, Columbia River water, and process water from the wastewater-plant clarifier, Umatilla River basin, Oregon.

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