# COMAR Title 26 — Department of the Environment

## Subtitle 10 — Oil Pollution Control and Storage Tank Management

### Chapter 12 — UST Systems with Field-Constructed Tanks and Airport Hydrant Fuel Distribution Systems

#### Regulation .02 Exception to Piping Secondary Containment Requirements.

*COMAR 26.10.12.02*

A. An owner and an operator of a UST system with a field-constructed tank greater than 50,000 gallons or an airport hydrant system may use single-walled piping when installing or replacing piping associated with the UST system.

B. An owner and an operator of a UST system with a field-constructed tank less than or equal to 50,000 gallons that is not part of an airport hydrant system shall meet the piping performance standards and secondary containment requirements of COMAR 26.10.03.02 when installing or replacing piping.