Unlabeled or mislabeled samples
Samples received at the improper transport temperature for requested test (e.g., frozen)
Unpreserved samples that have remained at room temperature for longer than 2 hours
Unpreserved samples that were refrigerated but received after 24 hours.
Preserved samples received after 72 hours
Samples not collected in sterile urine cups or urinalysis preservative tubes.
Samples that leaked in transport