Understanding the importance of underground storage tank (UST) regulation is key when maintaining a compliant fueling site.
There are more than 568,000 underground storage tanks (USTs) at 202,000 sites across the United States that are regulated by the Environmental Protection Agency’s (EPA) technical regulations. Of these, nearly 27% are not in significant operational compliance with either release prevention or leak detection requirements.
In 2010, the EPA introduced new emissions standards requiring medium- and heavy-duty trucks’ NOx levels to be reduced to almost zero. Selective Catalytic Reduction (SCR) technology in diesel engines and Diesel Exhaust Fluid (DEF) have since grown in popularity as a response to the EPA mandate. By 2012, there were over 500 retail fueling stations dispensing DEF.
On July 15, 2015, the US EPA finalized changes to the 1988 Underground Storage Tank (UST) regulation in 40 CFR part 280 and 281. Included in these changes are modifications to permitted overfill protection devices which impacted new and repaired equipment installations starting on October 13, 2015. Additionally, the EPA has added periodic operation and maintenance requirements for overfill prevention equipment to help ensure the equipment is operating properly and will activate before a UST is overfilled.