### Question
Can you define what pre-existing discharge means?


### Answer
**Pre-existing discharge** is defined as the following in *33 U.S.C. § 1311*:

> any discharge at the time of permit application under this subsection

#### Citation:
  - *33 U.S.C. § 1311*
  - Heading: **CHAPTER 26-WATER POLLUTION PREVENTION AND CONTROL > SUBCHAPTER III-STANDARDS AND ENFORCEMENT**

