| Company | Location | Certifications | License # |
|---|---|---|---|
| Aa Absolute Constructions | Roselle Boro, NJ | Closure Waste OilInstall Waste Oil | US916079 |
| Anco Environmental | Berkeley Heights Twp, NJ | ClosureInstallation-Entire UST SystemSubsurface Evaluation | US00024 |
| Brinks Tank Services | Hillside Twp, NJ | ClosureSubsurface Evaluation | US667184 |
| Hl Petroleum Co Inc | Linden City, NJ | Cathodic Protection SpecialistClosureInstallation-Entire UST SystemSubsurface Evaluation | US01201 |
| Js Held LLC | Summit City, NJ | Closure | US00779 |
| M Waters Tanks & Boilers LLC | Hillside Twp, NJ | ClosureSubsurface Evaluation | US301208 |
| Petro Tank Environmental LLC | Elizabeth City, NJ | HHO Closure | US930344 |
| Schiff Holdings LLC Dba Oil Tank Services | Roselle Boro, NJ | HHO ClosureHHO Subsurface Evaluation | US01134 |
| T Slack Environmental Services | Kenilworth Boro, NJ | ClosureInstallation-Entire UST SystemSubsurface EvaluationTank Testing | US00334 |
| Terms Environmental Services Inc | Berkeley Heights Twp, NJ | ClosureSubsurface Evaluation | US220540 |
| Trc Environmental Corporation | New Providence Boro, NJ | Subsurface Evaluation | US00163 |
11 companies in the NJDEP UST certification program are based in Union County as of 2026-07-17. Companies based elsewhere in New Jersey also commonly serve the county.
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