You shouldve asked for a copy of the actual MRO report instead of settling for verbal info.
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And for a lab ua if they detect that it is a substitution then it is considered inconclusive, and they consider it a refusal to give a sample, thus fail.
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"Inconclusive" and "Substituted" are two different rulings. An inconclusive result generally means that the lab, for whatever reason, was unable to obtain a valid result, is not treated as a refusal. Substituted is a conclusive ruling, determined when the samples creatinine and specific gravity numbers are so low and/or divergent that its not consistent with normal human urine. Substituted rulings are often treated as a refusal.
This is a bar code number, not the batch number. The batch number is an alphanumeric code printed on the instructions sheet.