---
kind: "section"
citation: "40 C.F.R. § 413.64"
title: "40"
number: "413.64"
heading: "Pretreatment standards for existing sources."
url: "https://uscodex.org/cfr/40/413.64"
---

# §413.64. Pretreatment standards for existing sources.


Except as provided in 40 CFR [403.7](/cfr/40/403.7.md) and [403.13](/cfr/40/403.13.md), any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with [40 CFR part 403](/cfr/40/part403.md) and achieve the following pretreatment standards for existing sources (PSES):

- (a) No User introducing wastewater pollutants into publicly owned treatment works under the provisions of this subpart shall augment the use of process wastewater or otherwise dilute the wastewater as a partial or total substitute for adequate treatment to achieve compliance with this standard.
- (b) For a source discharging less than 38,000 liters (10,000 gal.) per calendar day of electroplating process wastewater the following limitations shall apply:
- (c) For plants discharging 38,000 liters (10,000 gal.) or more per calendar day of electroplating process wastewater the following limitations shall apply:
- (d) Alternatively, the following mass-based standards are equivalent to and may apply in place of those limitations specified under [paragraph (c)](#c) of this section upon prior agreement between a source subject to these standards and the publicly owned treatment works receiving such regulated wastes:
- (e) For wastewater sources regulated under [paragraph (c)](#c) of this section, the following optional control program may be elected by the source introducing treated process wastewater into a publicly owned treatment works with the concurrence of the control authority. These optional pollutant parameters are not eligible for allowance for removal achieved by the publicly owned treatment works under [40 CFR 403.7](/cfr/40/403.7.md). In the absence of strong chelating agents, after reduction of hexavalent chromium wastes, and after neutralization using calcium oxide (or hydroxide) the following limitations shall apply:
- (f) In addition to paragraphs [(a)](#a) and [(b)](#b) of this section, the following limitation shall apply for plants discharging less than 38,000 l (10,000 gal) per calendar day of electroplating process wastewater:
- (g) In addition to paragraphs [(a)](#a), [(c)](#c), [(d)](#d), and [(e)](#e) of this section, the following limitation shall apply for plants discharging 38,000 l (10,000 gal) or more per calendar day of electroplating process wastewater:
- (h) In addition to paragraphs [(a)](#a), [(b)](#b), [(c)](#c), [(d)](#d), [(e)](#e), [(f)](#f), and [(g)](#g) of this section, the following shall apply: An existing source submitting a certification in lieu of monitoring pursuant to [§ 413.03](/cfr/40/413.03.md) of this regulation must implement the toxic organic management plan approved by the control authority.

## Notes

### Amendments

[46 FR 9467, Jan. 28, 1981, as amended at 48 FR 32484, July 15, 1983; 48 FR 43681, Sept. 26, 1983]

### Authority

Authority: Secs. 301, 304(g), 307, 308, 309, 402, 405, 501(a), Clean Water Act, as amended, (33 U.S.C. 1311, 1314(g), 1317, 1318, 1319, 1322, 1325 and 1341(a)).

### Source

Source: 46 FR 9467, Jan. 28, 1981, unless otherwise noted.

### Amendments

[46 FR 9467, Jan. 28, 1981, as amended at 48 FR 32484, July 15, 1983; 48 FR 43681, Sept. 26, 1983]