Line Leak Detection Testing
Annual Mechanical & Electronic LLD Verification
USTEX performs annual line leak detector testing and pressurized piping compliance verification under EPA 40 CFR Part 280. Independent, conflict-free testing confirms your LLD systems will restrict or shut off flow when detecting a simulated leak of 3.0 GPH at 10 PSI.
Line Leak Detection Testing Services
- Mechanical LLD Annual Testing — Confirms restriction or shutoff at 3.0 GPH at 10 PSI per EPA 40 CFR §280.40. Required annually for pressurized piping systems.
- Electronic LLD Verification — ELLD system accuracy, alarm functionality, and ATG integration verification. Confirms detection sensors accurately identify piping integrity loss.
- Pressurized Piping Integrity Testing — Pressure-based assessment identifying micro-fractures, joint failures, and product loss pathways.
- Suction Piping System Evaluation — Functional evaluation of suction piping configurations, check valve operation, and vacuum integrity.
- Dispenser Sump & Containment Verification — Inspection of dispenser sumps and piping containment sump integrity for secondary containment conformance.
Testing Standards
| Standard | Requirement |
|---|---|
| Mechanical LLD | 3.0 GPH at 10 PSI detection, annual test |
| Electronic LLD (alternative) | 0.2 GPH or 0.1 GPH sensitivity options |
| Federal Standard | EPA 40 CFR §280.40 |
| Wisconsin Standard | ATCP 93, WIDATCP Specialty Firm #560989 |
All Services | Schedule LLD Testing | UST Compliance Testing