DOT-COMPLIANT · ON-SITE EMPLOYER DRUG TESTING
Sulphur, LA Mobile Drug & Alcohol Testing
Lake Charles Petrochemical West Corridor · PHMSA Pipeline · I-10 FMCSA · Calcasieu Parish — Mobile collections at the refinery fence line.
Sulphur sits west of Lake Charles on the I-10 corridor — directly adjacent to the Citgo Lake Charles Refinery (one of the largest refineries in the U.S.), Westlake Chemical's ethylene complex, and PPG Industries' chlor-alkali operations. The density of PHMSA-regulated pipeline and petrochemical infrastructure in the Sulphur-Westlake-Lake Charles triangle is among the highest in the country. EPC contractors and turnaround crews rotating through these facilities require rapid pre-employment and random testing programs. OnSite Employer Testing serves Calcasieu Parish west of Lake Charles from the Sulphur corridor.
OnSite Employer Testing coordinates mobile drug testing collections at your Sulphur-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.
West Calcasieu's Refinery and Industrial Fence Line
DOT & PHMSA Testing Services — Sulphur
We coordinate the following collections for Sulphur-area employers:
- PHMSA 49 CFR Part 199 — Pipeline and refinery transfer workers at Citgo Lake Charles Refinery, Westlake Chemical, PPG Industries, and Calcasieu Parish industrial complex
- FMCSA 49 CFR Part 382 — CDL drivers on I-10, US-90, and LA-108 serving Sulphur industrial corridor
- Pre-employment, Random, Reasonable Suspicion, Post-Accident — urine, oral fluid, and EBT
- Large-scale EPC contractor mobilization panels — refinery turnaround workforces
- DOT Return-to-Duty & Follow-Up — SAP-supervised employees
- Louisiana Cannabis Law Compliance — state authorization does NOT affect PHMSA or DOT testing
Industries Served in Sulphur
- Petroleum refining — Citgo Lake Charles Refinery
- Petrochemical manufacturing — Westlake Chemical, PPG Industries
- Pipeline operations — Calcasieu Parish PHMSA-regulated infrastructure
- EPC construction — refinery turnaround contractors
- CDL freight — I-10 west Calcasieu corridor
- Healthcare — West Calcasieu Cameron Hospital
Applicable Regulations — Sulphur, LA
PHMSA 49 CFR Part 199 governs refinery and pipeline workers at Citgo, Westlake, and PPG facilities in Sulphur. FMCSA 49 CFR Part 382 applies to I-10 CDL fleets. Louisiana cannabis authorization does not affect PHMSA or DOT testing. Program design and compliance obligations remain your responsibility under applicable law — we coordinate the collections.
On-Site Collections in Sulphur
Citgo, Westlake Chemical, PPG, and I-10 carriers in west Calcasieu Parish — get PHMSA and DOT compliant mobile collections dispatched today.
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
Is Sulphur covered under the same service area as Lake Charles?
Yes. Sulphur, Westlake, and all of west Calcasieu Parish are covered under our Lake Charles service area. We dispatch to refinery gates and industrial facilities throughout the corridor.
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.
Mobile Testing for Sulphur's Refinery and Petrochemical Corridor
Citgo, Westlake Chemical, PPG, and I-10 carriers in west Calcasieu Parish — get PHMSA and DOT compliant mobile collections dispatched today.