(210) 549-6847 | Mobile Drug & DNA Collection — Serving the San Antonio Area | Mon–Sun 7 AM – 7 PM
DOT Compliant Collection

DOT Drug Testing in San Antonio

Certified DOT Urine Collection at Your Worksite, Fleet Yard, or Office — Serving the San Antonio Area

Request My DOT Quote (210) 549-6847
Veteran-Owned • 26 Years USAF MLS Certified Lab Scientist DOT Drug Collector Certified Mobile Service — We Come to You 7 AM – 7 PM Daily Chain-of-Custody Trained Results in Less Than 48 Hours Veteran-Owned • 26 Years USAF MLS Certified Lab Scientist DOT Drug Collector Certified Mobile Service — We Come to You 7 AM – 7 PM Daily Chain-of-Custody Trained Results in Less Than 48 Hours
Understanding DOT Testing

What is DOT Drug Testing & Who Needs It?

DOT drug testing is a federally mandated program under 49 CFR Part 40 that requires safety-sensitive employees in the transportation industry to be tested for drugs and alcohol. This applies to commercial truck drivers, pilots, train engineers, transit operators, pipeline workers, and maritime crew.

As a certified mobile collector, Stephen Christian brings the collection directly to your worksite or fleet yard—keeping your operations running and ensuring zero employee downtime. Whether you're an employer managing a random pool or an individual needing a pre-employment test, we handle the chain-of-custody with military precision.

The 5-Panel Test

The 5-Panel DOT Drug Test Explained

SubstanceCommon NamesWhat's Detected
Marijuana (THC)CannabisActive and inactive cannabinoid metabolites
CocaineCoke, CrackBenzoylecgonine (cocaine metabolite)
AmphetaminesMeth, Adderall, EcstasyAmphetamine, methamphetamine, MDMA
OpiatesHeroin, Codeine, MorphineHeroin metabolites, codeine, morphine
PhencyclidinePCP, Angel DustPCP metabolites
Industries Served

DOT Industries We Serve in San Antonio

FMCSA

Trucking, CDL drivers, and motor carriers operating commercial vehicles across state lines.

FAA

Aviation, pilots, and A&P mechanics performing safety-sensitive aircraft maintenance.

FRA

Railroad workers, engineers, and conductors operating trains and moving stock.

FTA

Public transit operators driving buses and managing urban transit systems.

PHMSA

Pipeline operators and hazmat employees managing energy infrastructure.

USCG

Maritime crew and mariners operating vessels in navigable waters.

Types of Tests

The 6 Types of DOT Drug Tests

Pre-Employment

Required before a new hire can perform any safety-sensitive duties for a DOT-regulated employer.

Random

Unannounced testing throughout the year. Selections must be truly random and scientifically valid.

Post-Accident

Required following qualifying accidents under DOT criteria. Alcohol within 8 hours, drugs within 32 hours.

Reasonable Suspicion

Triggered by documented behavioral observations by a trained supervisor.

Return-to-Duty

Required before an employee can resume safety-sensitive functions after a violation.

Follow-Up

Ongoing monitoring tests after a return-to-duty test, directed by an SAP.

Why Go Mobile?

Mobile DOT Drug Testing vs. Clinic Testing

Traditional ClinicMobile Collection (Precision)
2–4 hours employee downtime per test15–20 minutes per test
You pay travel costs & lost wagesZero travel cost — we come to you
Scheduled around clinic availabilityScheduled on your time
Public waiting roomPrivate, on-site controlled environment
Standard chain of custodySame — fully compliant
Visible cost per testCost-neutral or lower when downtime is factored in
How It Works

Our DOT Drug Collection Process in San Antonio

01

Request My Quote

Fill out the form or call (210) 549-6847. We confirm your needs and schedule.

02

We Come to You

Stephen arrives at your worksite, fleet yard, or office — no clinic trip.

03

ID Verified & Kit Opened

Sealed Federal CCF kit opened. Donor's government ID verified on-site.

04

Collection & Chain of Custody

Full DOT CCF protocol followed. Seals initialed in donor's presence.

05

Lab Results via MRO

SAMHSA-certified lab analyzes the sample. MRO reviews and delivers results.

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Our Role in the DOT Testing Chain

Precision DNA & Drug Testing is a specimen collection service. We do not perform the laboratory analysis or issue final results. We partner exclusively with SAMHSA-certified laboratories that perform the actual testing, and a licensed Medical Review Officer (MRO) reviews and verifies all non-negative results before they are released to the employer. This separation of duties is required by DOT regulations and ensures the integrity of every test.

Get Your DOT Drug Testing Program Quote Today

FAQ

DOT Drug Testing FAQs for San Antonio Employers

A 5-panel DOT drug test is the federally mandated urine drug screening required under 49 CFR Part 40. It detects marijuana, cocaine, amphetamines, opiates, and phencyclidine.
Negative results are typically returned within 24–48 hours. Non-negative results take 3–5 business days due to MRO review.
We work with laboratory partners that include MRO services. The MRO is a licensed physician separate from our collection service who reviews all non-negative results and verifies them before releasing the final result to the employer. This separation is a DOT compliance requirement.
At this time, we focus on collection services. For random pool selection, consortium membership, and full program management, we can refer you to compliant TPA (Third Party Administrator) partners. We handle the on-site collection piece of your existing program with zero downtime for your drivers.
Under DOT regulations, a refusal to test is treated the same as a positive result. The driver is immediately removed from safety-sensitive duties and must complete the Substance Abuse Professional (SAP) return-to-duty process before they can perform DOT-regulated work again. We document any refusal scenario thoroughly on the chain-of-custody form.
Every DOT collection follows the Federal Drug Testing Custody and Control Form (CCF) protocol. The donor is verified by photo ID, the collection container is sealed and labeled in their presence, both parties initial the seals, and the sealed specimen travels in a tamper-evident bag directly to the laboratory. Stephen's 26 years of laboratory experience means chain-of-custody integrity is treated as the priority — because in court or in compliance review, that's what holds up.
We provide mobile DOT drug collection within a 30-mile radius of San Antonio, including San Antonio, New Braunfels, Schertz, Cibolo, Seguin, Boerne, Helotes, Universal City, Live Oak, Converse, Selma, Leon Valley, and Alamo Heights. We can also coordinate larger fleet days for clients with multiple locations.
Yes. Post-accident testing has strict timing requirements under DOT — alcohol testing within 8 hours and drug testing within 32 hours. We prioritize post-accident dispatches during our operating hours of 7 AM – 7 PM, seven days a week. Call (210) 549-6847 immediately following a qualifying accident and we will respond as quickly as possible.

Ready to Set Up Your DOT Drug Testing Program?

Get Started Today

Request Your DOT Drug Testing Quote

Fill out the form and Stephen will respond within 1 business day with a custom quote for your fleet or worksite.

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(210) 549-6847
Mon–Sun, 7 AM – 7 PM

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Veteran-owned mobile drug testing and DNA collection serving the San Antonio area within 30 miles.

★ Veteran-Owned & Operated

Contact

(210) 549-6847
[email protected]
Mon–Sun, 7 AM – 7 PM
© 2026 Precision DNA & Drug Testing. All rights reserved.
Precision DNA & Drug Testing provides specimen collection services only. All laboratory analysis is performed by independent SAMHSA-certified laboratories (drug testing) and AABB-accredited laboratories (DNA testing).
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