DOT Regulated
Drug & Alcohol
Testing
Full-service DOT drug and alcohol testing for all regulated industries — FMCSA, FAA, FTA, FRA, PHMSA, and USCG. Stay audit-ready with LHID Labs as your compliant testing partner.
DOT Testing At a Glance
Motor Carriers & Trucking
Required for CDL drivers operating commercial motor vehicles over 26,001 lbs or transporting hazardous materials.
- Pre-employment testing
- Random pool management
- FMCSA Clearinghouse reporting
- Post-accident & reasonable suspicion
Aviation
Required for pilots, mechanics, air traffic controllers, and all safety-sensitive aviation employees.
- Pre-employment & random
- Return-to-duty programs
- Follow-up testing schedules
- FAA-compliant documentation
Public Transit
Covers bus drivers, train operators, and safety-sensitive employees of FTA-funded transit agencies.
- Urine & oral fluid options
- Random program management
- Post-accident protocols
- FTA-compliant reporting
Railroad
Required for train crews, dispatchers, and railroad maintenance workers in safety-sensitive roles.
- Accident/incident testing
- Reasonable cause testing
- Random program enrollment
- FRA Part 219 compliance
Pipeline & Hazmat
Covers operators of gas and hazardous liquid pipelines and operators of liquefied natural gas facilities.
- Pipeline operations testing
- Hazmat transportation
- Emergency response personnel
- PHMSA-compliant records
Maritime
Required for merchant mariners with USCG-issued credentials operating documented vessels.
- Mariner credential testing
- Vessel crew compliance
- Random program management
- USCG documentation
Pre-Employment
Required before any safety-sensitive duty begins
Random Testing
Unannounced draws from your random pool
Post-Accident
Required after qualifying accidents and incidents
Return-to-Duty
SAP-directed testing before resuming safety duties
Random Pool Management
Quarterly random selections at DOT-required rates with documented, defensible draws.
Supervisor Reasonable Suspicion Training
DOT-required 2-hour training for supervisors to identify and document reasonable suspicion.
Policy Development & Review
We help you create or update your written DOT drug and alcohol testing policy.
SAP Referral Network
Qualified Substance Abuse Professional referrals for return-to-duty follow-up.
Audit-Ready Recordkeeping
Digital records retained per DOT requirements — always ready for inspection.
Pre-Employment Queries
Full queries required before any CDL driver begins safety-sensitive duty.
Annual Limited Queries
Annual limited queries for all currently employed CDL drivers in your fleet.
Violation Reporting
We report all positive results, refusals, and actual knowledge violations on your behalf.
RTD & Follow-Up Tracking
Return-to-duty and follow-up testing documentation reported to Clearinghouse.
Ready to Enroll Your Company?
Get your DOT testing program set up quickly. Our team will have you compliant and audit-ready in days, not weeks.