U.S. Code of Federal Regulations
Regulations most recently checked for updates: Oct 07, 2022
(a) Any new source subject to this subpart must achieve the following standards:
Performance Standards (NSPS)
|Regulated parameter||Maximum daily 1||Maximum monthly average 1|
1 mg/L (ppm)
(b) Any new source subject to the provisions of this section that commenced discharging after November 21, 1988, and prior to November 20, 1998, must continue to achieve the standards specified for this section in the 1988 edition of 40 CFR part 439, until the expiration of the applicable time period specified in 40 CFR 122.29(d)(1), after which the source must achieve the standards specified in §§ 439.23 and 439.24.