40 CFR § 469.21
Compliance dates
June 9, 2020
The compliance date for the BAT fluoride limitation is as soon as possible as determined by the permit writer but in no event later than November 8, 1985. The compliance date for PSES for total toxic organics (TTO) is July 1, 1984 and for arsenic is November 8, 1985.
[48 FR 45250, Oct. 4, 1983, as amended at 49 FR 5923, Feb. 16, 1984]