Yes. Employers and Consortia/Third Party Administrators (C/TPAs) subject to more than one DOT Agency drug and alcohol testing rule may combine covered DOT safety-sensitive employees into a single random pool. However, companies doing so must test at or above the highest minimum annual random testing rates established by the DOT Agencies under whose jurisdiction the employees fall. So, if you have FMCSA regulated- and FRA regulated-employees in the same pool, and FMCSA has a 50% testing rate and FRA has a 25% rate, you must test the pool at the 50% minimum rate.
Note: PHMSA and USCG do not authorize random alcohol testing for employees in the pipeline and maritime industries. So if employees perform only pipeline duties or maritime duties, they cannot be in any DOT-regulated random alcohol testing pool.
Of course employers may decide to separate the pools by specific regulated transportation industry – such as a separate pool for truck drivers and a separate pool for transit workers. Each pool must be tested at the required DOT Agency rate for that industry.