"Our typical readings are about one-tenth to one-twentieth of that," said Tony D'Aquila, EPC environmental resources manager. "That gave us some concerns about the impacts on marine life."
Electronic tests taken Wednesday, which yield more immediate results, showed that previous high pH levels in the river had returned to normal. The pH level in water indicates whether it is acidic or alkaline. High pH can be indicative of high levels of ammonia.
"If the pH is back to normal today, you could jump to the conclusion that the ammonia is back to background level where it should be," D'Aquila said.
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