UST Service Technician Practice Test 2025 – All-in-One Study Guide for Exam Success!

A problem with the leak detection system in a UST can be indicated by chronic fluctuations in tank levels without corresponding sales or deliveries. When fuel levels exhibit unusual or inconsistent changes that do not correlate with expected usage or replenishment, it can suggest that product is leaking out of the tank. Properly functioning leak detection systems should show stable levels that align with fuel sales and delivery patterns. If there are significant discrepancies or unexplained fluctuations, it raises the possibility that a leak is present, which merits further investigation.

Consistent rises in fuel sales typically wouldn’t signal a leak, as they are expected variations that correlate with operational activity. Regular maintenance logs indicate that the equipment is being cared for, which helps ensure proper function, and frequent inspections that yield no findings suggest that the system is functioning correctly at the time of those checks. These factors do not indicate a problem with the leak detection system.