Reasonable Suspicion Testing
When a trained supervisor observes signs of drug or alcohol use, the test must happen fast. Our collectors dispatch same-day, on-site across Nebraska and Kansas, 24/7 — determination and collection documented to keep it defensible. Supervisors need DOT training first; we offer that too.
DOT reasonable-suspicion testing is triggered when a trained supervisor observes signs of drug or alcohol use (49 CFR 382.307). We collect same-day and on-site across Nebraska and Kansas, Part 40 compliant and MRO-verified.
A reasonable-suspicion test is only as defensible as the process behind it. It starts with a trained supervisor observing specific, contemporaneous signs — appearance, behavior, speech, odor — and it has to move quickly: once suspicion is formed the driver shouldn't be driving, and the test needs to happen before the window closes and the signs fade.
We collect while the suspicion is fresh
When your supervisor makes the call, we dispatch — same day, 24/7. Our own collectors across Nebraska and Kansas come to your terminal or site, so the driver is tested promptly instead of waiting hours for a clinic appointment.
Documented to hold up
Reasonable-suspicion testing draws scrutiny, so the paper trail matters. We help you capture the supervisor's documented observations, run a Part 40 collection with chain of custody, and return an MRO-verified result — the record you'll want if the determination is ever challenged.
The determination has to come from a trained supervisor
DOT requires that a reasonable-suspicion determination be made by a supervisor trained under 49 CFR 382.603 — at least 60 minutes on the signs of drug use and 60 on alcohol misuse. If your supervisors aren't trained yet, we provide that too — see Supervisor Reasonable Suspicion Training.
Key Features
Same-Day On-Site Collection
We test while the observation is fresh, at your terminal or site.
24/7 Dispatch — NE & KS
Our own collectors across Nebraska and Kansas respond around the clock.
Determination Documented
Support capturing the supervisor's contemporaneous observations for a defensible file.
Part 40 + MRO Verified
Chain-of-custody collection and Medical Review Officer verification.
Breath Alcohol On-Site
DOT and non-DOT evidential breath alcohol testing at your location.
Supervisor Training Available
We provide the DOT-required supervisor training that a reasonable-suspicion test depends on.
Compliance Requirements
Compliance Requirement
The basis — 49 CFR 382.307
A reasonable-suspicion test must be based on specific, contemporaneous, articulable observations of the driver's appearance, behavior, speech, or body odors, made by a supervisor or company official trained to detect the signs of drug use and alcohol misuse.
Who makes the call — 49 CFR 382.603
The determination must be made by a supervisor who has received the required training: at least 60 minutes on the signs of drug use and 60 minutes on the signs of alcohol misuse.
Timing and documentation
An alcohol test should be conducted promptly — attempted within 2 hours and, if not completed within 8 hours, stopped with a written explanation. Drug testing is conducted as soon as possible. The observations leading to the test must be documented, and the driver should be kept from safety-sensitive duty in the meantime.
Frequently Asked Questions
When a trained supervisor makes specific, contemporaneous, articulable observations of the driver's appearance, behavior, speech, or body odors that indicate drug use or alcohol misuse (49 CFR 382.307).
A supervisor trained under 49 CFR 382.603 — at least 60 minutes on the signs of drug use and 60 on alcohol misuse. We offer that training if your supervisors aren't yet certified.
Same-day. Our own collectors across Nebraska and Kansas dispatch 24/7, so the test happens while the suspicion is fresh rather than hours later at a clinic.
An alcohol test should be attempted within 2 hours and stopped with a written explanation if not completed within 8 hours. Drug testing is done as soon as possible. The driver should be kept off safety-sensitive duty in the meantime.
$95 per mobile test, plus dispatch fees when applicable. Consortium members receive discounted rates.
Support capturing the supervisor's observation record, Part 40 chain of custody, and the MRO-verified result — a defensible file if the determination is challenged.
Yes. Our Supervisor Reasonable Suspicion Training meets the DOT 382.603 requirement and is delivered online or in-person, for a single supervisor or a whole team.
Related Services
C/TPA & Consortium Program
Diversified Drug Testing is your Consortium/Third-Party Administrator — we run your entire DOT drug and alcohol program. Random pool management, every test type collected by our mobile team across Nebraska and Kansas or in-clinic, plus MRO, SAP, and DER support. $129/year per company.
Pre-Employment Drug Testing
A driver can't perform safety-sensitive functions until you have a verified negative pre-employment drug test (49 CFR 382.301). Test at our clinics, on-site with our mobile collectors across Nebraska and Kansas, or at a partner site nationwide. MRO-verified. $75 clinic / $95 mobile.
Post-Accident Testing
When an accident happens, the clock starts: DOT requires alcohol testing within 8 hours and drug testing within 32 (49 CFR 382.303). Our 24/7 dispatch and our own collectors across Nebraska and Kansas get a driver tested — and every attempt documented — so you meet the window and stay defensible.
When a supervisor makes the call, we're on the way — same-day, on-site reasonable-suspicion testing across Nebraska and Kansas, documented to hold up.
Contact our testing specialists to learn how we can support your drug and alcohol testing program.
- C/TPA Program Administration
- 24/7 Post-Accident Response
- 3,000+ Testing Sites Nationwide