### Question
What is the definition of secondarily contained?


### Answer
The definition of **secondarily contained** is as follows in *42 U.S.C. § 6991b*:

> a release detection and prevention system that meets the requirements of 40 CFR 280.43(g), but shall not include under-dispenser spill containment or control systems

#### Citation:
  - *42 U.S.C. § 6991b*
  - Heading: **CHAPTER 82-SOLID WASTE DISPOSAL > SUBCHAPTER IX-REGULATION OF UNDERGROUND STORAGE TANKS**

