40 CFR § 430.66 - Pretreatment standards for existing sources (PSES).

---
identifier: "/us/cfr/t40/s430.66"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 430.66 - Pretreatment standards for existing sources (PSES)."
title_number: 40
title_name: "Protection of Environment"
section_number: "430.66"
section_name: "Pretreatment standards for existing sources (PSES)."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "430"
part_name: "THE PULP, PAPER, AND PAPERBOARD POINT SOURCE CATEGORY"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Sections 301, 304, 306, 307, 308, 402, and 501 of the Clean Water Act, as amended, (33 U.S.C. 1311, 1314, 1316, 1317, 1318, 1342, and 1361), and Section 112 of the Clean Air Act, as amended (42 U.S.C. 7412)."
regulatory_source: "63 FR 18635, Apr. 15, 1998, unless otherwise noted."
cfr_part: "430"
---


# 430.66 Pretreatment standards for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart that introduces pollutants into a publicly owned treatment works must: comply with 40 CFR part 403; and achieve the following pretreatment standards for existing sources (PSES) if it uses chlorophenolic-containing biocides. Permittees not using chlorophenolic-containing biocides must certify to the permit-issuing authority that they are not using these biocides. PSES must be attained on or before July 1, 1984:

Subpart F

|  |  |  |
| --- | --- | --- |
| Pentachlorophenol | (0.032)(10.3)/y | 0.0014 |
| Trichlorophenol | (0.010)(10.3)/y | 0.00043 |
| y = wastewater discharged in kgal per ton of product. |  |  |
| The following equivalent mass limitations are provided as guidance in cases when POTWs find it necessary to impose mass equivalent limitations. |  |  |