### Question
What does mass balance mean?


### Answer
**Mass balance** has the following meaning in *42 U.S.C. § 11023*:

> an accumulation of the annual quantities of chemicals transported to a facility, produced at a facility, consumed at a facility, used at a facility, accumulated at a facility, released from a facility, and transported from a facility as a waste or as a commercial product or byproduct or component of a commercial product or byproduct

#### Citation:
  - *42 U.S.C. § 11023*
  - Heading: **CHAPTER 116-EMERGENCY PLANNING AND COMMUNITY RIGHT-TO-KNOW > SUBCHAPTER II-REPORTING REQUIREMENTS**

