Section 302.669  Listing of Derived Criteria

a)         The Agency must develop and maintain a listing of toxicity criteria pursuant to this Subpart.  This list must be made available to the public and updated whenever a new criterion is derived and must be published when updated in the Illinois Register.

b)         A criterion published pursuant to subsection (a) may be proposed to the Board for adoption as a numeric water quality standard.

c)         The Agency must maintain for inspection all information, including assumptions, toxicity data, and calculations, used to derive any toxicity criterion listed pursuant to subsection (a) until adopted by the Board as a water quality standard.

(Source:  Amended at 47 Ill. Reg. 4437, effective March 23, 2023)