# COMAR Title 26 — Department of the Environment

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

### Chapter 17 — Shop-Fabricated Aboveground Storage Tanks

#### Regulation .05 Performance Standards for AST Systems with a Shop-Fabricated AST.

*COMAR 26.10.17.05*

An owner, an operator, and a person in charge of an AST system with a shop-fabricated AST shall:

A. Ensure the AST system is:

  (1) Properly selected for the oil storage application and type of oil stored; and

  (2) Constructed to an industry standard, including a UL, STI or API standard;

B. Ensure the foundation for a stationary shop-fabricated AST is:

  (1) Constructed to:

    (a) Support the AST;

    (b) Prevent movement and uneven settlement of the foundation and the AST; and

    (c) Provide positive drainage of water away from the foundation;

  (2) Capable of supporting the soil-bearing pressure of the AST and its contents; and

  (3) Designed by a qualified professional engineer using field and laboratory testing and analyses, if the AST system is located in an area subject to flooding;

C. Install an elevated AST system, unless:

  (1) An alternate AST system is approved by the Department in writing; and

  (2) The owner, the operator, and the person in charge of the alternate AST system installs, tests, and maintains a cathodic protection system in accordance with Regulation .10 of this chapter; and

D. Test a new, repaired, or relocated AST system for tightness in accordance with NFPA 30 “Flammable and Combustible Liquids Code”:

  (1) Upon completing the installation or repair of the AST system; and

  (2) Before placing the AST system in-service.