Onsite Drug Testing Safety First has a network of certified professionals that can perform urine, breath, hair and oral fluid collections as well as point of collection testing.  In addition, our network of certified professionals can perform DOT physicals onsite. Safety First can come to an employer's location for monthly and/or quarterly random drug screen collections, alcohol testing and physicals. Employees take only a few minutes out of their work schedule to have these services performed and completed at one time.  If you add up the employee's time away from the job site waiting in a medical clinic, the savings for onsite services can be tremendous.