A urine sample lacking odor is hardly a concern for the collectors or labs, as this condition is exhibited in some human samples as well.

Collectors are not gonna arbitarily sniff every urine sample being placed in their hands. However, red flags will be raised if a collector, during the course of processing the sample, happens to catch whiff of any obvious foreign odor thats not supposed to be present in human urine (i.e. bleach, household chemicals, etc.)