40 CFR 439.46 - Pretreatment standards for existing sources (PSES).

Regulations last checked for updates: Feb 11, 2026

Title 40 - Protection of Environment last revised: Dec 22, 2026

View all text of Subpart D [§ 439.40 - § 439.47]

§ 439.46 - Pretreatment standards for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart must achieve the following standards by September 21, 2001:

Pretreatment Standards (PSES)

Regulated parameter	Maximum daily ¹	Maximum monthly average ¹
Acetone	20.7	8.2
n-Amyl acetate	20.7	8.2
Ethyl acetate	20.7	8.2
Isopropyl acetate	20.7	8.2
Methylene chloride	3.0	0.7

¹ mg/L (ppm).

[68 FR 12274, Mar. 13, 2003]

authority: 33 U.S.C. 1311,1314,1316,1317,1318,1342

source: 48 FR 49821, Oct. 27, 1983, unless otherwise noted.

cite as: 40 CFR 439.46