FAA · FMCSA · FRA · ON-SITE EMPLOYER TESTING
Mobile Drug & Alcohol Testing in St. Louis, Missouri
On-site DOT-compliant collections at St. Louis Lambert International Airport for FAA-regulated pilots, flight crew, maintenance, and cargo ramp employers — plus St. Louis' unique position as a four-railroad FRA hub where Union Pacific, BNSF, Norfolk Southern, and CSX all converge — Anheuser-Busch CDL fleet, Boeing Defense DOD contractors, and Spire Gas PHMSA operators.
On-site DOT-compliant collections at St. Louis Lambert International Airport for FAA-regulated pilots, flight crew, maintenance, and cargo ramp employers — plus St. Louis' unique position as a four-railroad FRA hub where Union Pacific, BNSF, Norfolk Southern, and CSX all converge — Anheuser-Busch CDL fleet, Boeing Defense DOD contractors, and Spire Gas PHMSA operators. St. Louis anchors aviation — pilots, flight crew & cargo (faa 14 cfr part 120), rail — four class i railroads (fra), brewing & beverage distribution (fmcsa) employer demand — including St. Louis Lambert (STL); STL cargo; Union Pacific St. Louis; BNSF St. Louis, and related operators across Missouri. For safety-sensitive CDL drivers, pipeline workers, railroad crews, defense contractors, and aviation employees who cannot leave a shift for a clinic visit, mobile collection keeps operations staffed while meeting federal custody requirements.
OnSite Employer Testing coordinates mobile drug testing collections at your St. Louis-area facility, yard, terminal, or job site. We do not operate a clinic. Review how it works or browse all locations we serve across the region.
Why St. Louis Employers Need Mobile Testing
STL Lambert FAA pilot and flight crew 14 CFR Part 120 collections — pre-employment, random, post-accident, and return-to-duty for American, Southwest, Delta, United, and cargo carrier employer programs
Four-railroad FRA coverage: Union Pacific, BNSF, Norfolk Southern, and CSX — separate compliant programs for each railroad employer
program design and compliance obligations remain your responsibility under applicable law — we coordinate the collections
Industries We Serve in St. Louis
St. Louis Lambert (STL)
St. Louis Lambert (STL) — American/Southwest/Delta/United FAA pilot and crew employer programs (FAA-regulated or employer-directed programs where applicable). We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the St. Louis market.
STL cargo
STL cargo — FedEx/UPS/Amazon Air FAA safety-sensitive cargo ramp operations (FAA-regulated or employer-directed programs where applicable). We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the St. Louis market.
Union Pacific St. Louis
Union Pacific St. Louis — FRA covered-service railroad employees (FRA-regulated or employer-directed programs where applicable). We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the St. Louis market.
BNSF St. Louis
BNSF St. Louis — FRA covered railroad employees (FRA-regulated or employer-directed programs where applicable). We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the St. Louis market.
Norfolk Southern St. Louis
Norfolk Southern St. Louis — FRA covered-service railroad employees (FRA-regulated or employer-directed programs where applicable). We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the St. Louis market.
CSX St. Louis Terminal
CSX St. Louis Terminal — FRA covered railroad employees (FRA-regulated or employer-directed programs where applicable). We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the St. Louis market.
Anheuser-Busch InBev St. Louis
Anheuser-Busch InBev St. Louis — CDL keg and product distribution private fleet FMCSA (FMCSA-regulated or employer-directed programs where applicable). We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the St. Louis market.
Boeing Defense St. Louis
Boeing Defense St. Louis — F-15/F-18 manufacturing DOD contractor Non-DOT (Non-DOT-regulated or employer-directed programs where applicable). We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the St. Louis market.
Spire Inc. (Laclede Gas)
Spire Inc. (Laclede Gas) — PHMSA natural gas distribution St. Louis metro (PHMSA-regulated or employer-directed programs where applicable). We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the St. Louis market.
MoDOT District 6
MoDOT District 6 — I-70/I-64/I-55/I-44 St. Louis metro construction CDL fleets (FMCSA-regulated or employer-directed programs where applicable). We coordinate on-site collections for pre-employment, random, post-accident, and reasonable suspicion events at employer facilities throughout the St. Louis market.
Applicable Regulations
Employers in St. Louis commonly coordinate testing under:
- 14 CFR Part 120 — FAA anti-drug and alcohol misuse prevention for ALL aviation safety-sensitive employees: pilots, flight attendants, dispatchers, aircraft maintenance, ground security coordinators, and air traffic controllers
- 49 CFR Part 40 — DOT collection and laboratory procedures
- 49 CFR Part 219 — FRA covered service Union Pacific, BNSF, Norfolk Southern, and CSX St. Louis
- 49 CFR Part 199 — PHMSA Spire/Laclede Gas natural gas distribution operators
- 49 CFR Part 382 — FMCSA CDL beverage, logistics, and construction carrier fleets
- DOD contractor drug-free workplace requirements — FAR 52.223-6 for Boeing Defense St. Louis
- Missouri Drug-Free Workplace Act — employer program framework
Testing Services Available in St. Louis
We coordinate the following collections for St. Louis-area employers:
DOT drug testing collections (FMCSA, FRA, FAA, FTA, PHMSA)
- Pre-employment drug and alcohol testing
- Reasonable suspicion and return-to-duty testing
Breath alcohol testing (BAT certified)
- Oral fluid drug testing
Mobile and on-site collections at your facility, yard, or job site
On-Site Collections in St. Louis
Anheuser-Busch InBev CDL keg and product distribution fleet on-site pre-employment and random testing
Boeing Defense St. Louis DOD contractor collections for F-15/F-18 manufacturing workforce
Spire/Laclede Gas PHMSA gas distribution field crew collections throughout the St. Louis metro
MoDOT I-70/I-64/I-55/I-44 St. Louis metro construction CDL contractor testing
24/7 post-accident and reasonable-suspicion response throughout the Greater St. Louis metro
Use our instant quote calculator to scope your collection or visit our service areas page for broader coverage context.
Questions from employers in this region
STL Lambert serves American, Southwest, Delta, and United — can you coordinate separate FAA programs for each airline?
Yes. Each airline employer maintains its own FAA 14 CFR Part 120 anti-drug and alcohol misuse prevention program independently. We coordinate separate on-site collections for each carrier employer program at STL — maintaining distinct chain-of-custody records for each airline's pilot, crew, maintenance, and ground operations safety-sensitive employees.
St. Louis is one of the few US cities where all four major Class I railroads converge — how do you manage that complexity?
St. Louis's unique four-railroad junction means UP, BNSF, NS, and CSX all have covered-service employees in the metro simultaneously. We maintain completely separate FRA 49 CFR Part 219 compliant programs for each railroad employer and their respective contractors — with distinct random pool management, chain-of-custody records, and post-incident response protocols per carrier.
Anheuser-Busch runs one of the largest beverage CDL fleets in the US from St. Louis — how do you handle their scale?
Anheuser-Busch's St. Louis CDL distribution operation includes both company-owned vehicles and contracted carrier fleets delivering to retailers throughout the region. We coordinate FMCSA Part 382 pre-employment and random testing for A-B's CDL private fleet employees and their third-party carrier partners — on-site at St. Louis distribution facilities.
Boeing builds F-15s and F-18s in St. Louis — what DOD contractor testing applies?
Boeing Defense's St. Louis facility is subject to DOD contractor drug-free workplace requirements under FAR 52.223-6 for their defense manufacturing workforce. We coordinate collections at Boeing's St. Louis campus coordinated with facility security and Boeing contractor program management.
Core programs: Mobile & on-site drug testing, DOT drug testing, Non-DOT drug testing, Post-accident testing, Reasonable suspicion testing, Random testing programs, Breath alcohol testing. Planning: how it works, instant quote calculator, all locations. Industries: employer industries we support. Long-form answers: Employer drug testing FAQ. Quick questions: Contact us.
For how we think about regions and feasibility, see service areas.
Nationally coordinated collection support
OnSite Employer Testing is headquartered in Illinois and coordinates mobile and on-site employer testing across selected regions and employer locations—including through partner collectors when your program, timing, and geography allow. Availability depends on location, timing, test type, site access, collector availability, and scheduling needs.
Scope collections for your St. Louis-area operation
Share your facility address, expected donor count, test reason, and DOT or non-DOT status — we confirm what is workable and send a written proposal.