Specifications include, but are not limited to: Possess all necessary and industry recommended materials, equipment, and facilities to provide DOT and Non-DOT drug screening and breath alcohol testing. Possess all necessary materials, equipment and facilities to provide for the collection (including direct observation when requested or required) and refrigerated storage of split sample specimens. Employ sufficient personnel, including trained technicians, to provide for integrity and security of records and specimens. Execute the chain-of custody procedures established by the DOT as well as any procedures established by agreement with the CITY. A collection site must be located within Denton city limits and other collection sites throughout the United States. Available for collection at least 8 hours per day Monday through Friday between 7am – 6pm. Ensure integrity of other laboratories used, including Medical Review Officer (MRO) services.