DOT-COMPLIANT · ON-SITE EMPLOYER DRUG TESTING
Mobile Drug & Alcohol Testing in Williamsport, Pennsylvania
On-site DOT-compliant collections for Marcellus shale E&P and gathering pipeline PHMSA operators throughout North-Central Pennsylvania — Range Resources, Repsol, and Coterra Energy — PPL and UGI gas distribution PHMSA field crews, and Lycoming County timber CDL employers where no clinic is within 40 miles.
On-site DOT-compliant collections for Marcellus shale E&P and gathering pipeline PHMSA operators throughout North-Central Pennsylvania — Range Resources, Repsol, and Coterra Energy — PPL and UGI gas distribution PHMSA field crews, and Lycoming County timber CDL employers where no clinic is within 40 miles. Williamsport anchors oil & gas — marcellus shale e&p & gathering (phmsa/fmcsa), pipeline & utilities (phmsa), timber & forest products (fmcsa) employer demand — including Coterra Energy (Cabot O&G) — Lycoming/Sullivan/Tioga Marcellus shale PHMSA gathering pipeline; Repsol Oil & Gas USA — Marcellus shale E&P and gathering PHMSA North-Central PA; Range Resources — SW/North-Central PA Marcellus shale PHMSA gathering operators; Halliburton / SLB — Marcellus shale oilfield service CDL equipment fleet FMCSA, and related operators across Pennsylvania. 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 Williamsport-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 Williamsport Employers Need Mobile Testing
Coterra, Repsol, and Range Resources Marcellus PHMSA gathering pipeline operator collections throughout North-Central PA
Halliburton and SLB Marcellus oilfield service CDL fleet testing at Williamsport-area staging yards
program design and compliance obligations remain your responsibility under applicable law — we coordinate the collections
Industries We Serve in Williamsport
Coterra Energy (Cabot O&G) — Lycoming/Sullivan/Tioga Marcellus shale PHMSA ...
Coterra Energy (Cabot O&G) — Lycoming/Sullivan/Tioga Marcellus shale PHMSA gathering pipeline (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 Williamsport market.
Repsol Oil & Gas USA — Marcellus shale E&P and gathering PHMSA North-Centra...
Repsol Oil & Gas USA — Marcellus shale E&P and gathering PHMSA North-Central PA (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 Williamsport market.
Range Resources — SW/North-Central PA Marcellus shale PHMSA gathering opera...
Range Resources — SW/North-Central PA Marcellus shale PHMSA gathering 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 Williamsport market.
Halliburton / SLB — Marcellus shale oilfield service CDL equipment fleet FMCSA
Halliburton / SLB — Marcellus shale oilfield service CDL equipment 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 Williamsport market.
PPL Gas Utilities Williamsport — PHMSA gas distribution Lycoming County
PPL Gas Utilities Williamsport — PHMSA gas distribution Lycoming County (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 Williamsport market.
UGI Utilities North-Central PA — PHMSA gas distribution Clinton/Tioga counties
UGI Utilities North-Central PA — PHMSA gas distribution Clinton/Tioga counties (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 Williamsport market.
Collins Pine / Domtar — Lycoming County timber and paper CDL carrier fleet ...
Collins Pine / Domtar — Lycoming County timber and paper CDL carrier 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 Williamsport market.
PENNDOT District 3 — US-15/US-220 North-Central PA construction CDL fleets
PENNDOT District 3 — US-15/US-220 North-Central PA 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 Williamsport market.
Applicable Regulations
Employers in Williamsport commonly coordinate testing under:
- 49 CFR Part 40 — DOT collection and laboratory procedures
- 49 CFR Part 199 — PHMSA Coterra/Repsol/Range Resources Marcellus gathering and PPL/UGI distribution operators
- 49 CFR Part 382 — FMCSA CDL oilfield service, timber, and construction carrier fleets
- Pennsylvania Drug and Alcohol Abuse Control Act — employer drug-free workplace program framework
Testing Services Available in Williamsport
We coordinate the following collections for Williamsport-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 Williamsport
PPL and UGI PHMSA gas distribution field crew collections throughout Lycoming, Clinton, Sullivan, and Tioga counties
Timber and forest products CDL employer testing — Collins Pine, Domtar, and independent log truck operators
Remote North-Central PA service — Marcellus well sites and pipeline ROW staging areas 40+ miles from any clinic
PENNDOT District 3 construction CDL contractor on-site testing along US-15 and US-220
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
Lycoming County is deep Marcellus territory — how do you reach remote pipeline and well site employers?
We serve Marcellus shale PHMSA gathering pipeline and oilfield service CDL employers throughout Lycoming, Sullivan, Tioga, Clinton, and Potter counties — areas where the nearest testing clinic is 40 to 60 miles away. On-site mobile testing is the only practical compliance solution for employers in North-Central PA's producing region.
Multiple companies — Coterra, Repsol, Range — operate in the same North-Central PA counties. Can you serve all of them?
Yes. We maintain separate PHMSA Part 199 compliant programs for each Marcellus shale operator employer — Coterra, Repsol, Range Resources, and their respective contractor tiers — with distinct chain-of-custody documentation for each employer's covered-function pipeline workforce.
Lycoming County timber operations dispatch CDL log trucks before dawn — can you test before first load?
Yes. Timber CDL employers in North-Central PA are a classic mobile testing use case. We meet your drivers at the log yard or mill staging area before first departure — testing the crew before they hit rural roads where no clinic exists for miles.
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 Williamsport-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.