Industries
Drug Testing for Construction Employers & Job Sites
Why Construction Sites Need On-Site Drug Testing
Construction is one of the most safety-critical industries in the world. Drug and alcohol impairment on a job site can cause serious accidents — and federal and state rules, owner requirements, and union agreements often require regular testing.
The problem? Sending craft workers to a clinic in the middle of a concrete pour or crane lift wastes hours you don't have. We come to your site instead.
What Drug Testing Programs Does Construction Use?
Most construction employers run a combination of:
- Pre-employment testing — Before a new hire starts on-site
- Random testing — Unannounced testing for current workers
- Post-accident testing — After any incident involving injury, equipment damage, or near-miss
- Reasonable suspicion testing — When a supervisor documents observed impairment
- Owner/client-mandated testing — Required by the general contractor or project owner
Multi-Employer Job Sites — Who Tests Whom?
On most commercial construction projects, you'll have multiple employers on-site:
- The general contractor (GC)
- Subcontractors
- Specialty trades
- Owner-furnished workers
Each employer is responsible for testing their own employees under their own policy. We can coordinate collections for multiple employers on the same site — but each company's paperwork stays separate.
DOT Drug Testing on Construction Sites
Some construction employees are covered by DOT rules — specifically drivers of commercial motor vehicles (CDL holders) hauling materials or equipment. These employees need DOT drug testing.
Non-CDL craft workers — carpenters, ironworkers, electricians, etc. — typically fall under non-DOT testing governed by your company's written policy.
How We Stage Collections on a Job Site
We work with your site safety team to set up a private collection area. This might be:
- A job site trailer or portable office
- A designated area with restroom access
- A site office or break room
We plan around your shift schedule, trade stacking, and any active work zones so testing doesn't create a safety hazard itself.
High-Volume Mobilizations
Starting a new project phase and need to test 50+ workers quickly? We can send multiple collectors and work through an entire crew in organized windows. Tell us your headcount and timeline when you request a quote.
Request a job site testing quote
Share your site location, headcount, and program type—we'll confirm staging and collection logistics.