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 4. Relations between (A) sulfate-chloride and (B) calcium-delta oxygen-18 (δ¹⁸O) for water samples from wells, Terrace Farm site Umatilla River basin, Oregon. (Probable end-members are at the three points of each triangle.)

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