§ 423.17 Pretreatment standards for new sources (PSNS).
(a) 1982 PSNS. Except as provided in 40 CFR 403.7, any new source as of October 14, 1980, subject to paragraph (a) of this section, which introduces pollutants into a publicly owned treatment works, must comply with 40 CFR part 403, the following pretreatment standards for new sources, and the PSES in § 423.16, established on November 3, 2015. In the case of conflict, the more stringent standards apply:
(1) PCBs. There shall be no discharge of polychlorinated biphenyl compounds such as those used for transformer fluid.
(2) Chemical metal cleaning wastes. The pollutants discharged in chemical metal cleaning wastes shall not exceed the concentration listed in the following table:
| Pollutant or pollutant property | PSNS |
|---|---|
| Maximum for any 1 day (mg/L) | |
| Copper, total | 1.0 |
(3) [Reserved]
(4)
(i) Cooling tower blowdown. The pollutants discharged in cooling tower blowdown shall not exceed the concentration listed in the following table:
| Pollutant or pollutant property | PSNS |
|---|---|
| Maximum for any time (mg/L) | |
| The 126 priority pollutants (appendix A) contained in chemicals added for cooling tower maintenance, except: | ( 1) |
| Chromium, total | 0.2 |
| zinc, total | 1.0 |