Above Ground Storage Tanks

An above ground storage tank (AST) can be used to store heating oil where underground storage (UST) is not desired, practical, or required.  Not frequently, an AST will be used to replace an UST that has begun to leak.  Leaked heating oil from an AST is regulated the same as a leak from an UST i.e. reporting and cleanup requirements are the same.  When a release is detected from an AST, it is required by law to report the leak to NCDENR within 24 hours and to commence source removal and cleanup

The NCDENR does not reimburse cleanup costs resulting from the leaking AST.  Only 10% of the tank has to be buried for it to be considered an UST.  Before a tank is removed, it is important to determine if it is an AST or an UST; if the tank leaked, it could be the difference between getting reimbursed for required cleanup or not getting reimbursed.