If you cannot find a particular chart now, please check back periodically since we plan to update this collection as additional charts become available.Ġ.375' = 3/8' 0.500' = 1/2' 0.625' = 5/8' 0.750' = 3/4' 0. In providing this information, Unidocs is not endorsing the use of any particular manufacturer's equipment. Since original tank charts can be difficult to find, Unidocs has provided the following charts as a service to UST owners / operators and UST Service Technicians. If you cannot find an original chart, Modern Welding has a tank chart generator for steel tanks available here. Click here for Containment Solutions tanks.

Some tank manufacturers have calibration charts available on their websites: Built per UL 58, 1746 part III and Glasteel II tank specifications. When performing an underground storage tank (UST) overfill prevention equipment inspection, it is very important to use the correct tank calibration chart to determine whether or not the equipment is activating at the correct level.

Modern welding tank charts