Failing or rejecting a needed SAP Evaluation Department of Transportation (DOT) drug and alcohol check are often troublesome not just for workers but also employers. Workers should be suspended from protective work that could lead to employers being short-staffed. Once a failing check, there’s a method got wind of by the Department of Transportation that workers should bear before returning to protective duties. All employers entrusted by the DOT square measure beholden to suit federal law. Entry into the reinstatement method begins with associate (Substance Abuse Professional) SAP analysis.