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

§ 439.16 Pretreatment standards for existing sources (PSES).

(a) Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart must continue achieving the standards for cyanide specified in paragraph (c) of this section and must achieve the following standards by September 21, 2001:

Pretreatment Standards (PSES)

Regulated parameter	Maximum daily1	Maximum monthly average1
Ammonia (as N)2	84.1	29.4
Acetone	20.7	8.2
4-methyl-2-pentanone	20.7	8.2
Isobutyraldehyde	20.7	8.2
n-Amyl acetate	20.7	8.2
n-Butyl acetate	20.7	8.2
Ethyl acetate	20.7	8.2
Isopropyl acetate	20.7	8.2
Methyl formate	20.7	8.2
Isopropyl ether	20.7	8.2
Tetrahydrofuran	9.2	3.4
Benzene	3.0	0.7
Toluene	0.3	0.2
Xylenes	3.0	0.7
n-Heptane	3.0	0.7
n-Hexane	3.0	0.7
Methylene chloride	3.0	0.7
Chloroform	0.1	0.03
1,2-dichloroethane	20.7	8.2
Chlorobenzene	3.0	0.7
o-Dichlorobenzene	20.7	8.2
Diethyl amine	255.0	100.0
Triethyl amine	255.0	100.0

¹ mg/L (ppm)

² Not applicable to sources that discharge to a POTW with nitrification capability.

(b) Sources that discharge to a POTW with nitrification capability (defined at § 439.1(i)) are not required to achieve the pretreatment standard for ammonia (as N).

(c) The limitations for cyanide are the same as specified in § 439.12(e), (f) and (g).

[68 FR 12272, Mar. 13, 2003]