Specifications include, but are not limited to: Perform substance abuse testing in accordance with the Department of Transportation Federal Highway Administration (DOT) regulations and Henrico County policy/procedure which includes: Pre-employment urine drug screening to include collection, chain-of-custody, analysis and MRO services (Attachment E, Category 1). Random, For Cause, Post-Accident, Return to Work and Follow-up urine drug and breath alcohol screening to include collection, chain-of-custody, analysis and MRO services (Attachment E, Category 1). Substance abuse testing results shall be forwarded to County personnel according to established procedure within 48 hours from the time service rendered. Capability to perform service on a “walk-in” basis, or by prescheduled appointment. Alternative means of Substance abuse testing through Hair Drug Screen for those persons who are physiologically unable to produce urine for testing (ie. End-stage renal disease/dialysis patient). Provide radiology services to include chest x-rays on designated employees identified by the County (Attachment E, Category 2). Chest x-ray results shall be forwarded to the Clinic Manager within 48 hours from the time service rendered. The Successful Offeror shall have the capability to perform service on a “walk-in” basis, or by a prescheduled appointment.