Either the Agency or a POTW with an approved POTW pretreatment program may initiate program modification at any time to reflect changing conditions at the POTW. Program modification is necessary whenever there is a significant change in the operation of a POTW pretreatment program that differs from the information in the POTW's submission, as approved under Sections 310.541 through 310.546.

BOARD NOTE: Derived from 40 CFR 403.18(a), as added at 53 Fed. Reg. 40615, October 17, 1988.

(Source: Amended at 47 Ill. Reg. 5083, effective March 23, 2023)