DOT-COMPLIANT · ON-SITE EMPLOYER DRUG TESTING
Mobile Employer Drug Testing in Port Arthur, Texas
We travel to your refinery gate, petrochemical plant, or port facility and administer federally compliant DOT and Non-DOT collections on-site. No clinic. No downtime.
Port Arthur, Texas, is home to the Motiva Port Arthur Refinery — the largest petroleum refinery in the United States, processing over 600,000 barrels of crude oil per day. Total Energies operates the Total Port Arthur Refinery immediately adjacent to the Motiva complex, making the Port Arthur corridor the highest-concentration refinery district in North America. Valero, BASF, and other major petrochemical producers operate facilities in the broader Port Arthur and Port Neches area. The Port of Port Arthur is a deepwater terminal handling crude oil, petroleum products, and petrochemicals for the refinery complex. PHMSA 49 CFR Part 199 pipeline and terminal safety program requirements govern covered employees at these facilities — pipeline technicians, loading rack operators, and gas plant workers who are safety-sensitive by federal definition. For an employer operating a continuous-process refinery with hundreds of covered employees, the mobile testing model is not a preference — it is the only operationally sound approach.
OnSite Employer Testing coordinates mobile drug testing collections at your Port Arthur refinery gate, terminal, or contractor staging area. We do not operate a clinic. Review how it works or browse all locations we serve.
Why Port Arthur Employers Need Mobile Testing
The Motiva Port Arthur Refinery processes more crude oil per day than any other single facility in the United States. The Total Port Arthur Refinery operates immediately adjacent. Together, these two facilities employ thousands of workers and support thousands more turnaround contractors who require pre-access drug testing before entering either facility. In peak turnaround season, pre-access testing demand can reach hundreds of collections per day across the Port Arthur corridor. No clinic in Port Arthur has the capacity or the proximity to serve that demand efficiently — mobile collection at the contractor staging area or refinery gate is the operational standard for every major refinery in this complex.
Turnaround contractors working at Motiva and Total cycle through the facilities on short mobilization windows. A craft worker who clears pre-access testing on Monday can be demobilized by Friday. The next mobilization wave starts the following Monday. Mobile collection at the contractor camp or staging area — not a clinic across town — is the only model that handles that velocity without creating testing bottlenecks that delay mobilization.
Program design and compliance obligations remain your responsibility under applicable law — we coordinate the collections.
Industries We Serve in Port Arthur
Motiva and Total Refinery Operations
Motiva Enterprises operates the Port Arthur Refinery — the largest crude oil refinery in the United States — with a nameplate capacity exceeding 600,000 barrels per day. Total Energies Petrochemicals operates the Total Port Arthur Refinery adjacent to the Motiva complex. PHMSA 49 CFR Part 199 covers pipeline and terminal employees at both facilities. Turnaround and maintenance contractors require Non-DOT pre-access testing as a condition of site entry. We coordinate PHMSA-compliant energy and utilities collections and Non-DOT pre-access testing at both facilities and at contractor staging areas in the Port Arthur corridor.
BASF, Valero, and Petrochemical Plant Contractors
BASF Total Petrochemicals, Valero's Port Arthur operations, and other chemical manufacturers in the Port Neches–Groves–Nederland petrochemical belt require the same pre-access Non-DOT testing and PHMSA-compliant program support as the Motiva and Total refineries. The Gulf Coast chemical plant workforce routinely rotates between sites — a contractor who completes pre-access at Motiva may start at BASF the following week. We coordinate both DOT drug testing and Non-DOT workplace drug testing for contractors and plant employers across the Port Arthur petrochemical corridor.
Port Logistics and Tanker Fleet Carriers
FMCSA-regulated tanker carriers hauling petroleum products from Port Arthur refineries to regional terminals and distribution points operate from fleet yards throughout Jefferson County. CDL tanker drivers require pre-employment, random, and post-accident testing under FMCSA 49 CFR Part 382. We coordinate logistics and transportation collections at tanker carrier terminals and fleet yards in the Port Arthur area.
Construction and Turnaround Craft Workforce
Port Arthur's petrochemical turnaround sector employs some of the largest craft workforces in the country during scheduled refinery outages. Construction contractors and specialty trade employers — pipefitters, boilermakers, ironworkers, electricians — maintain Non-DOT pre-access programs required by Motiva, Total, and BASF as a condition of site entry. We coordinate high-volume pre-access testing at contractor yards, staging areas, and craft hiring halls throughout the Port Arthur area.
Testing Services Available in Port Arthur
We coordinate the following collections for Port Arthur-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
Communities We Serve Near Port Arthur
In addition to Port Arthur, we serve employers throughout the Golden Triangle petrochemical belt including Port Neches, Nederland, Groves, Beaumont, Orange, and Bridge City.
Employers at the Motiva and Total refinery complexes, the BASF facility in Port Neches, and throughout the Jefferson County petrochemical corridor are within our standard mobile service range. Use our instant quote calculator to scope your collection or visit our service areas page.
Questions from employers in this region
Motiva Port Arthur requires pre-access drug testing for all turnaround contractors before badging. Can you coordinate same-day testing for 100 or more workers at the contractor staging area?
Yes. High-volume pre-access collections for refinery turnaround mobilizations — including 100-plus donors in a single day — are a primary use case for mobile testing. We coordinate collections at the contractor staging area or designated pre-access facility with a schedule matched to your workforce report time. Contact us at (219) 315-0345 to discuss volume, timing, and logistics.
The Total Port Arthur Refinery uses a contractor management system that tracks testing compliance. What documentation do we provide after a mobile collection?
Following each collection, you receive a standard 49 CFR Part 40 Federal Drug Testing Custody and Control Form (CCF) chain-of-custody document for DOT collections, or the applicable Non-DOT chain-of-custody form for Non-DOT pre-access testing. MRO-verified results are routed through your designated MRO. We do not manage the MRO relationship or the contractor management system — we coordinate the collection and documentation.
BASF Port Neches and Motiva Port Arthur are adjacent but separate facilities with different pre-access requirements. Can you serve both in a single day?
Yes. Multi-facility visits within the Port Arthur–Port Neches–Nederland corridor are logistically feasible when collections are scheduled in advance with each employer's DER. Each facility's collection is managed under that employer's program and documentation. Contact us to discuss scheduling for a corridor visit.
We manage turnaround craft hiring for multiple Port Arthur and Beaumont clients. Can you serve as a testing resource for our staffing operation?
Yes. Staffing agencies and craft labor contractors managing workers across multiple Golden Triangle facilities are a standard service scenario. Each employer you place workers with determines their own pre-access requirements — we coordinate the collections for your workers at each facility or at your agency's location, using the panel and procedure each host employer specifies.
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 Port Arthur-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.