24/7 Emergency Response for a Logistics Operation: Multiple Operators and Backups, Ready Around the Clock

A large logistics operation runs around the clock, which means its incidents do too. When its trained supervisors determine that a post-accident or reasonable-suspicion test is required, the regulatory clock has already started, and sending someone to hunt for a collector at that point is how programs fall behind. So this operation runs its whole testing program through PSI, anchored by the 24/7 emergency coverage a round-the-clock business needs. The determinations stay where the rule puts them, with the operation's supervisors and DER (49 CFR 382.303, 382.307(c)); PSI provides the collector inside the two-, eight-, and thirty-two-hour windows. Pre-employment testing clears new hires, DOT and non-DOT random pools run on one cycle, on-site crews collect at the operation's own hours, supervisor training prepares the overnight shift to make the call correctly, and the Clearinghouse work stays current, all under one administrator, with the after-hours response path arranged in advance rather than improvised at 2 a.m.