These quick tutorial videos were produced by and cover the following topics:


Video content is provided as a courtesy from Ben Thomas at, who offers online Class A/B and C UST operator training nationwide. Ben Thomas has over 30 years of experience in the petroleum industry helping owners and inspectors solve complex technical problems in the management of underground storage tank systems.

TLS-350 Functions

A brief discussion about the functions available on the Veeder-Root TLS-350 Automatic Tank Gauge and how to check the functions set on your gauge, which are unique to your underground storage tank system. Functions checked include; in-tank inventory, in-tank test result reading, continuous statistical leak detection results, liquid status for interstitial sensors, and starting or stopping a leak test.

TLS-350 Leak Testing

The primary job of an automatic tank gauge is to detect whether a tank is leak more than two tenths of a gallon per hour. In this video Ben Thomas shows us how to access the last leak detection test results on a TLS-350 automatic tank gauge and what the test results mean. 

TLS-350 Interstitial Monitoring

Many operators are unsure about whether their fueling system includes double-wall tanks or double-wall piping. This video gives operators a quick tip for how to determine whether their system includes secondary containment on their TLS-350 ATG. We will also determine how many interstitial monitors are included and their current status.

TLS-350 Inventory Report

This video describes a quick way to check the basic inventory information of your fuel site using a TLS-350 automatic tank gauge. This quick report tells you how many tanks are on site, their product, ullage and current inventory.

TLS-350 Volume & Ullage

This quick video discusses how to determine how much fuel to order without overfilling your tank using basic data from your TLS-350 ATG.