Most companies who perform alcohol testing upon employees make it clear upon hiring that this is their practice – their alcohol and drug testing policies are typically included in their employee handbooks. Refusal by employees to submit to alcohol testing may be grounds for dismissal. Employers typically use alcohol testing under specific circumstances.
The United States Department of Transportation specifies when applicants can be tested for alcohol as part of pre-employment screening. The testing must be performed upon all applicants for a position and the testing must be conducted as a post-offer requirement.