DOT-COMPLIANT · ON-SITE EMPLOYER DRUG TESTING
Mobile Drug & Alcohol Testing in Manassas, Virginia
On-site DOT-compliant and Non-DOT collections for Prince William County warehousing and distribution CDL fleets, federal and defense contractors, and I-66 logistics corridor employers in Northern Virginia.
On-site DOT-compliant and Non-DOT collections for Prince William County warehousing and distribution CDL fleets, federal and defense contractors, and I-66 logistics corridor employers in Northern Virginia. Manassas anchors warehousing & distribution (fmcsa), federal & defense contracting (dod), logistics & i-66 corridor (fmcsa) employer demand — including Prince William County warehousing and distribution centers; Manassas-area federal and defense contractors; I-66 corridor trucking companies; Novant Health UVA Health System Prince William, and related operators across Virginia. 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 Manassas-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 Manassas Employers Need Mobile Testing
Prince William County warehousing and distribution center multi-employer FMCSA CDL fleet testing
Manassas-area federal and defense contractor FAR 52.223-6 compliant Non-DOT collections
program design and compliance obligations remain your responsibility under applicable law — we coordinate the collections
Industries We Serve in Manassas
Prince William County warehousing and distribution centers
Prince William County warehousing and distribution centers — multi-employer FMCSA logistics 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 Manassas market.
Manassas-area federal and defense contractors
Manassas-area federal and defense contractors — Non-DOT FAR 52.223-6 program employers (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 Manassas market.
I-66 corridor trucking companies
I-66 corridor trucking companies — CDL 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 Manassas market.
Novant Health UVA Health System Prince William
Novant Health UVA Health System Prince William — Non-DOT fleet and contractor workforce (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 Manassas market.
Washington Gas Manassas
Washington Gas Manassas — PHMSA natural gas distribution operators (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 Manassas market.
VDOT NoVA District
VDOT NoVA District — Prince William County highway construction contractor 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 Manassas market.
Applicable Regulations
Employers in Manassas commonly coordinate testing under:
- 49 CFR Part 40 — DOT collection and laboratory procedures
- 49 CFR Part 382 — FMCSA CDL distribution, logistics, and construction carrier fleets
- DOD contractor drug-free workplace requirements — FAR 52.223-6 for Manassas-area federal contractors
- 49 CFR Part 199 — PHMSA Washington Gas distribution operators
- Code of Virginia § 40.1-27.3 — Virginia workplace drug testing considerations
Testing Services Available in Manassas
We coordinate the following collections for Manassas-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 Manassas
I-66 corridor trucking company pre-employment and random pool management
Washington Gas PHMSA gas distribution field crew collections throughout Manassas
VDOT NoVA District highway construction CDL contractor on-site testing at active project sites
24/7 post-accident and reasonable-suspicion response throughout the Manassas area
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
Manassas has a growing warehousing and distribution presence — can you scale with a fast-growing CDL fleet?
Yes. We coordinate testing programs that scale from small private fleets to large multi-site distribution operations, handling random pool management, pre-employment batches, and post-accident response as your CDL workforce grows along the I-66 corridor.
We have both warehouse CDL drivers and federal contract office staff in Manassas — can you handle both in one program?
Yes. We coordinate FMCSA Part 382 CDL testing and FAR 52.223-6 Non-DOT drug-free workplace testing in the same on-site visit, maintaining separate documentation for each employee category.
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 Manassas-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.