Please explain
3. During a BOD test, a wastewater sample is found to have a DO concentration in excess of 7 mg/L. What does this result indicate? (A) Anaerobic conditions are present. (B) Anoxic conditions are present. (C) Biological organisms are absent in the sample. (D) The sample has been exposed to the atmosphere for an extended period of time.
3. During a BOD test, a wastewater sample is found to have a DO concentration in excess of 7 mg/L. What does this result
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3. During a BOD test, a wastewater sample is found to have a DO concentration in excess of 7 mg/L. What does this result
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