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University tracer study finds no dye at Red Hill Shaft; carbon‑pack hits under review for cross‑contamination
Summary
A university‑led dye tracer test injected rhodamine WT at a monitoring well; direct sampling and transducers have not detected dye at Red Hill Shaft, while some activated‑carbon pack extractions showed low detections that the team suspects may be field cross‑contamination.
Researchers running a dye‑tracer test to ground‑truth groundwater flow near Red Hill reported early results that contradicted some expectations: direct sampling and downhole fluorometers have not recorded rhodamine WT at Red Hill Shaft, while several activated‑carbon packs have produced low, extracted dye signals that investigators now suspect could be from field cross‑contamination.
"So far to the present date, we have not seen any evidence of dye influx," Don…
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