Bleach, Drano powder and pool cleaning chemicals are all oxidants and can be used to adulterate a drug test.

After you have asked the person to:

• remove shoes and outer clothing, and
• pat themselves down

… get them to wash their hands well, using soap and water. It is important to make sure that their is attention to the donor washing underneath all fingernails.

This will prevent any chemicals being smuggled in that could be dropped into the drug test.