Just to see if you have any experience to share in this subject.
We have Temporary Workers agencies doing drug testing in premises. I challenged the QA Manager and Human Resources and their response was "I do not know" or "I did not know" . Those statements by themselves raised a flag in my opinion.
since we are not set up for this type of activities, my questions are (Usually any suspicions or required testing for employment for employees are sent to out source clinic or hospital):
Could this be a cross contamination issue or hazard?
Liability or issues in relation to our food defense plan?
Legality issues? (Even though every country is different.) In the US there is always legality issues with everything.
Any thoughts will be greatly appreciated.