40 CFR § 439.27 - Pretreatment standards for new sources (PSNS).

---
identifier: "/us/cfr/t40/s439.27"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 439.27 - Pretreatment standards for new sources (PSNS)."
title_number: 40
title_name: "Protection of Environment"
section_number: "439.27"
section_name: "Pretreatment standards for new sources (PSNS)."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "439"
part_name: "PHARMACEUTICAL MANUFACTURING POINT SOURCE CATEGORY"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1311, 1314, 1316, 1317, 1318, 1342 and 1361."
regulatory_source: "48 FR 49821, Oct. 27, 1983, unless otherwise noted."
cfr_part: "439"
---


# 439.27 Pretreatment standards for new sources (PSNS).

Except as provided in 40 CFR 403.7, any new source subject to this subpart must achieve the following pretreatment standards:

|  |  |  |
| --- | --- | --- |
| 1 Acetone | 20.7 | 8.2 |
| 2 n-Amyl acetate | 20.7 | 8.2 |
| 3 Ethyl acetate | 20.7 | 8.2 |
| 4 Isopropyl acetate | 20.7 | 8.2 |
| 5 Methylene chloride | 3.0 | 0.7 |
| Mg/L (ppm). |  |  |

[63 FR 50431, Sept. 21, 1998; 64 FR 48104, Sept. 2, 1999]