Return to Duty Drug Testing Ensures Readiness to Work It confirms that the employee is drug-free and ready to return to safety-sensitive tasks. Follows SAP Clearance Employees must comply with SAP recommendations before being retested. Restores Trust A successful test helps rebuild trust between the employee, team, and employer. Observed Testing Required To maintain test validity, all RTD tests are directly observed per federal standards. Protects Public and Workplace Safety Ensures that only qualified, sober individuals return to critical roles.