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Watershed- and Regional Scale Contamination

Downstream view of Pinal Creek, Ariz., where a tracer solution was injected into the stream during a tracer test. Water-quality sampling crews can be seen in the distance
Downstream view of Pinal Creek, Ariz., where a tracer solution was injected into the stream during a tracer test. Water-quality sampling crews can be seen in the distance -- from the Abandoned Hard-Rock Mining Photo Gallery


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Page Last Modified: Tuesday, 06-May-2014 14:36:56 EDT