Mobile DOT Drug Testing Units for Construction and Industrial Employers
When a post-accident testing window opens, you have two hours to collect an alcohol specimen and eight hours for a drug specimen. Sending an injured worker to an offsite clinic – in a truck, through traffic, to a waiting room – burns through that window. A missed window is not an inconvenience. It is a federal compliance failure that creates liability exposure in every subsequent legal proceeding tied to that incident.
Occucare International deploys DOT-certified mobile drug testing units directly to your job site. We bring the collection to your workforce – not the other way around. Post-accident response. Random program management. Pre-employment screening. Reasonable suspicion. All performed onsite, all fully compliant with 49 CFR Part 40, all with complete chain-of-custody documentation that survives FMCSA audits.
Contact Occucare International to schedule deployment across your Houston-area job sites
Clinic Hours
- Monday - Friday 7:30 AM - 4:30 PM CST
- +1 713 802 0801
Why Employers Trust Occucare for DOT Testing
93% onsite management rate
Injuries handled at the site – not escalated to ERs that miss testing windows
Board-certified occupational medicine physicians
Medical Review Officer services managed in-house, not outsourced
40+ years in occupational health
Federal compliance is core to our model – not an add-on service
3,000+ clinic network
If mobile unit deployment is not optimal for a location, we have certified collection alternatives
Same-day documentation delivery
Audit-ready records delivered to your safety director after every collection
What 49 CFR Part 40 Actually Requires of Employers
Federal DOT drug and alcohol testing regulations under 49 CFR Part 40 apply to any employer with safety-sensitive employees operating commercial motor vehicles, heavy equipment, or performing functions covered under DOT agency regulations (FMCSA, FAA, FRA, FTA, PHMSA). This is not optional compliance – it is a federal mandate with audit enforcement.
The regulation governs six mandatory testing circumstances:
- Pre-employment testing – required before a safety-sensitive employee performs a function for the first time
- Random testing – conducted on an unannounced, scientifically random basis throughout the year (FMCSA requires 50% of covered employees annually for drugs, 10% for alcohol)
- Post-accident testing – triggered by any DOT-reportable accident; alcohol within 2 hours, drugs within 8 hours; if window is missed, employer must document why
- Reasonable suspicion testing – when a trained supervisor observes specific, contemporaneous indicators of drug or alcohol use
- Return-to-duty testing – required before an employee who violated the policy returns to safety-sensitive duties
- Follow-up testing – minimum 6 unannounced tests in the 12 months following return to duty
The regulation also mandates that all specimens be collected by a DOT-qualified collector, processed through a SAMHSA-certified laboratory, and reviewed by a qualified Medical Review Officer (MRO) before results are reported to the employer. Every step has documentation requirements. Every gap in documentation is an audit finding.
Who This Service Is For
Mobile DOT drug testing is built for employers, not individuals. The following buyer profiles represent the primary decision-makers for this service:
General Contractors with Multi-Site Crews
You are managing 200-600 workers across three to five active job sites in the Houston area. Running separate clinic visits across sites for a random selection cycle is a logistics problem, a productivity drain, and a recordkeeping headache. A single mobile unit routes between your sites in one day.
Safety Directors Responsible for FMCSA Compliance
Your company operates commercial motor vehicles. Your drivers are safety-sensitive employees. An FMCSA audit examines every aspect of your drug and alcohol testing program: enrolment, random rates, post-accident timelines, MRO documentation, and return-to-duty records. A gap in any one area is a finding. You need a provider whose documentation survives scrutiny.
Industrial Employers Running DOT-Regulated Operations
Pipeline, midstream, or PHMSA-regulated operations require DOT drug and alcohol testing for covered employees. Your workforce may be spread across facilities in the greater Houston and Texas region. Mobile collection eliminates the lost productivity of sending workers off-site.
HR Managers Without Internal DOT Compliance Expertise
Managing a DOT-compliant random testing program – consortium enrollment, selection rate calculations, custody and control form management, MRO coordination – requires expertise most HR departments do not have in-house. Occucare manages the program infrastructure so you stay compliant without building an internal function.
Project Managers Handling Pre-Mobilization Clearances
You have 80 new workers starting on a federal project Monday. Pre-employment DOT testing must be completed before they perform safety-sensitive functions. You need mobile collection capacity that can process a batch of workers at your staging area without requiring clinic visits the week before mobilization.
The True Cost of Sending Workers Offsite for DOT Testing
| Pain Point | Real-World Consequence | Occucare Mobile Solution |
| Post-accident window exposure | Missed 2-hour alcohol window = compliance failure; creates liability in litigation | Emergency dispatch to job site; collection begins within the compliance window |
| Lost labor per test | 1.5-3 hours per worker for transport, wait, and return; 50-person random = 75-150 lost hours per cycle | Zero transport time; workers tested onsite and return to duty immediately |
| Multi-site coordination | Three sites, one day, three separate clinic logistics – impossible to execute cleanly | Single mobile unit routes between sites; one scheduling call covers all locations |
| Reasonable suspicion visibility | Sending a worker to a clinic announces the situation to the entire crew and creates operational disruption | Discreet onsite collection; situation handled privately without crew awareness |
| Audit documentation gaps | Chain-of-custody failures, incomplete MRO records, and missing timelines generate FMCSA citations | Federal CCF documentation maintained; employer records delivered same day |
| Consortium management complexity | Random selection rate calculation, MRO coordination, and recordkeeping require expertise most HR teams lack | Occucare manages consortium enrollment and program administration on your behalf |
How Occucare Mobile DOT Testing Works
Every collection follows 49 CFR Part 40 protocols without exception. Here is the process from dispatch to documentation:
Step 1
Employer contacts Occucare – testing type confirmed (post-accident, random, pre-employment, reasonable suspicion), site location provided, number of employees identified
Step 2
  DOT-certified collector dispatched – Occucare deploys a qualified collector to your job site, staging area, or facility; no employee transport required
Step 3
  Collection conducted per Part 40 – specimen collected in a private, compliant setting; observed collection performed when required by regulation
Step 4
 Chain of custody initiated – Federal Custody and Control Form (CCF) completed at point of collection; specimen sealed and tamper-evident
Step 5
 Specimen shipped to SAMHSA-certified laboratory – all specimens analyzed at a federally certified laboratory; no shortcuts in the analytical chain
Step 6
Non-negative results reviewed by MRO – Occucare’s Medical Review Officer contacts the employee directly to review any legitimate medical explanation before reporting to the employer
Step 7
Employer receives results and documentation – final result reported to the safety director; complete CCF documentation retained and available for FMCSA audit production
This is the complete, audit-defensible chain. Every step is documented. Every handoff has a record.
If your current provider cannot walk you through this process exactly – or if any step is handled by a contractor you have no visibility into – you have an audit exposure.
Mobile DOT Testing Services Occucare Deploys
Post-Accident DOT Drug and Alcohol Testing
Federal regulations require that post-accident testing happen fast. Alcohol: within 2 hours. If that window closes, you must document why. Drugs: within 8 hours. Every minute spent coordinating an offsite clinic visit is a minute off the clock. Occucare dispatches certified collectors to your accident site so the testing window is met, documented, and defensible.
DOT Random Drug Testing Program Management
FMCSA requires that 50% of your covered employees be tested for drugs annually, and 10% for alcohol. The selection must be scientifically random, unannounced, and spread across the calendar year. Occucare manages consortium enrollment, random selection generation, and collection scheduling – mobile units deployed to your site on the selection date.
Pre-Employment DOT Drug Testing
Before a safety-sensitive employee performs a covered function for the first time, they must receive a negative drug test result. For large project mobilizations or high-volume hiring periods, Occucare deploys mobile collection units to your staging area, office, or job site to batch-process pre-employment screenings without clinic appointments or employee travel.
Reasonable Suspicion Drug and Alcohol Testing
When a trained supervisor observes specific behaviors indicating possible impairment, testing must happen immediately. Sending the employee offsite is slow, disruptive, and often signals the situation to the entire crew. Occucare deploys a collector to your site for same-day reasonable suspicion collection – discreet, fast, and fully documented.
Return-to-Duty and Follow-Up Testing
An employee who violated the drug and alcohol policy must receive a negative return-to-duty test from a DOT-qualified SAP-referred collection before resuming safety-sensitive duties. Follow-up testing – a minimum of six unannounced tests in 12 months – can be coordinated through Occucare’s mobile units across your active work locations.
Non-DOT Drug Testing for Non-Regulated Employees
Many construction and industrial employers maintain drug-free workplace programs that apply to employees not covered under DOT regulations. Occucare mobile units can administer non-DOT drug testing for your general workforce during the same site deployment, eliminating a separate scheduling event.
The Financial Case for Mobile DOT Testing
The cost of a compliance failure is not the fine – it is the downstream liability. Here is how the numbers compare:
| Scenario | Offsite Clinic Approach | Occucare Mobile Unit |
| 50-person random selection cycle | 75-150 lost labor hours at $45-$85/hr = $3,375-$12,750 per cycle in productivity loss alone | Zero transport time; workers return to duty immediately after collection |
| Post-accident missed testing window | FMCSA violation; potential disqualification of workers’ comp defense in litigation; attorney fees | Mobile dispatch meets compliance window; documentation is audit-ready from day one |
| FMCSA audit – documentation gaps | Each citation: $1,000-$16,000 per violation depending on severity and pattern | Federal CCF documentation delivered to employer same day; MRO records maintained |
| Reasonable suspicion delay | Sending worker offsite: 2-4 hours elapsed; crew awareness of situation; potential crew disruption | Onsite collection in under 30 minutes; discreet; crew operations uninterrupted |
| Annual random consortium management | In-house HR management: partial FTE allocation + risk of selection rate errors | Occucare manages program; employer receives selection notices and schedules collection |
Compliance Standards and Regulatory Framework
Every Occucare mobile DOT testing deployment operates within the following regulatory and professional standards framework. This section exists because compliance-credible providers demonstrate mastery of the regulatory landscape – not just familiarity with it.
| Standard / Entity | Role in Your Testing Program |
| 49 CFR Part 40 | The federal regulation governing all DOT drug and alcohol testing procedures, collection protocols, laboratory analysis, MRO review, and employer recordkeeping |
| FMCSA (Federal Motor Carrier Safety Administration | DOT agency governing commercial motor vehicle operators; sets random testing rate requirements and conducts compliance audits |
| SAMHSA-Certified Laboratory | All urine specimens must be analyzed at a federally certified laboratory; Occucare uses only SAMHSA-certified facilities |
| Medical Review Officer (MRO) | A licensed physician trained in drug testing interpretation who reviews all non-negative results before employer notification; Occucare manages MRO services in-house |
| Breath Alcohol Technician (BAT) | Certified professional qualified to administer evidential breath alcohol tests using approved EBT devices; required for post-accident and reasonable suspicion alcohol testing |
| Substance Abuse Professional (SAP) | A credentialed evaluator required in the return-to-duty process; Occucare connects employers to qualified SAP referrals |
| Federal Custody and Control Form (CCF) | The tamper-evident documentation chain that tracks every specimen from collection through laboratory analysis; must be complete for audit production |
| DOT Random Testing Consortium | A pool of employer-covered employees from which random selections are drawn; Occucare manages consortium enrollment for employers who cannot maintain their own pool |
Why Occucare - Not a Broker, Not a Staffing Agency
The mobile drug testing market is filled with third-party brokers who dispatch independent collectors they have never credentialed directly. Here is the risk: if a broker’s collector completes a collection incorrectly – wrong chain of custody form, improper observation protocol, incomplete documentation – you own the compliance failure. The broker does not.
Occucare is an occupational health company with 40+ years of operational history in industrial health. We are not a broker. Our collectors operate within our quality management system. Our MRO services are in-house. Our documentation standards are built for FMCSA audit production. When a government auditor asks for your testing records, you produce Occucare documentation – not forms assembled from three different subcontractors.
- DOT-certified collectors operating under Occucare’s quality management system – not independent brokers
- In-house Medical Review Officer – no third-party MRO coordination delays
- Board-certified occupational medicine physician oversight of the testing program
- Same-day documentation delivery to your safety director after every collection event
- Emergency post-accident dispatch capability – Houston metro and surrounding Texas regions
- Consortium management available – Occucare administers your random testing program infrastructure
- Integrated with Occucare’s injury management and medical direction programs – one provider manages the continuum from testing through injury oversight
Frequently Asked Questions - Mobile DOT Drug Testing for Employers
Occucare mobile units can perform all six federally required DOT testing types: pre-employment, random, post-accident, reasonable suspicion, return-to-duty, and follow-up testing. Alcohol testing via evidential breath testing devices and urine drug testing are both available onsite. Non-DOT drug testing for general workforce employees can be performed during the same site visit.
Post-accident response times vary based on location and time of day. Occucare prioritizes post-accident dispatch across the Houston metro area and surrounding Texas regions. Employers should contact us immediately following a DOT-reportable accident - the federal testing window begins at the time of the accident, not when you call us. We confirm dispatch timelines when you initiate the request so you can document the response accurately for your records.
Yes. Occucare can enroll your covered employees in a DOT random testing consortium and manage the program infrastructure on your behalf. This includes maintaining the covered employee pool, generating random selections that meet FMCSA rate requirements, scheduling mobile collection, coordinating MRO review, and maintaining records in a format that supports FMCSA audit production. Employers who lack internal DOT compliance expertise use this service to remove the administrative burden entirely.
After every mobile collection event, Occucare delivers the Federal Custody and Control Form (CCF) documentation, the MRO-verified result, the collection timestamp and site information, and the chain-of-custody record to the safety director or designated DER (Designated Employer Representative). For post-accident testing, the timeline of events is documented to demonstrate compliance with federal testing windows. All records are maintained in formats suitable for immediate production during an FMCSA audit.
Yes. All Occucare collectors performing DOT specimen collection are qualified under 49 CFR Part 40 requirements. Collectors complete DOT-qualified training, demonstrate proficiency in collection procedures, and operate within Occucare's quality management system. Alcohol testing is performed by Breath Alcohol Technicians (BATs) using DOT-approved Evidential Breath Testing devices. Collector credentials are documented and available for employer review.
Yes. Occucare coordinates multi-site deployment for random testing cycles where the same collector routes between your active job sites in a single day. This is one of the primary operational advantages of mobile testing for general contractors managing multiple concurrent projects. Site routing, scheduling, and collection sequencing are managed by Occucare - you provide the site locations and the selection list.
FMCSA audits examine whether your testing program meets regulatory requirements across six compliance areas: program maintenance, random rate compliance, post-accident testing timeliness, MRO record availability, DER designation, and supervisor training documentation. Offsite clinic testing introduces gaps in three of these areas: post-accident timelines are harder to defend when transport time is involved, chain-of-custody documentation from third-party brokers is inconsistent, and same-day result delivery is often absent. Occucare mobile testing addresses all three: onsite collection meets post-accident windows, CCF documentation is complete and standardized, and results are delivered to your DER same day.
Related Services
Mobile Clinic Units
Full mobile occupational health clinic for construction site injury management and pre-placement services
Mobile Testing Units (Respirator, PFT, Pre-Placement)
Respirator fit testing, pulmonary function, and pre-placement physicals deployed to your site
Employer Drug Testing
Clinic-based DOT and non-DOT drug testing when mobile deployment is not required
Corporate Medical Direction
Board-certified physician oversight of your full workplace health program including testing program governance
Mobile Medical Hub
Full overview of Occucare's mobile occupational health services
Deploy Mobile DOT Testing to Your Job Site
Occucare International has managed occupational health programs for construction and industrial employers since 1980. Our mobile DOT testing units bring compliant, documented, audit-ready collection directly to your workforce – eliminating the logistics problems, the productivity drain, and the compliance exposure that come with offsite testing.
Contact us to schedule your first deployment or to discuss a managed DOT random testing program for your covered employees.
Or call our Houston office to speak with an occupational health specialist about your program requirements.