UST

Alternative Fuels and Underground Storage Tanks (USTs)

Corrosion of Metal Components in USTs Storing Diesel and Gasoline-Ethanol Blends
 
Corrosion has been commonly reported in USTs storing diesel fuel and gasoline-ethanol blended fuels.  The corrosion generally appears in different areas of the UST system for each fuel. When storing diesel fuel, corrosion generally appears on metal components inside USTs.  When storing ethanol blended fuels, corrosion generally appears in sumps.  Instances of this corrosion began appearing about a decade ago.