420.25—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 must achieve the following pretreatment standards for existing sources (PSES):

(a) Sintering operations with wet air pollution control system. The following table presents PSES for sintering operations with wet air pollution control systems:

Subpart B—Pretreatment Standards for Existing Sources (PSES)

Regulated parameter	Maximum daily 1	Maximum monthly avg. 1
Ammonia-N 2,3	0.0150	0.00501
Cyanide 2	0.00300	0.00150
Phenols (4AAP) 2	0.000100	0.0000501
Lead	0.000451	0.000150
Zinc	0.000676	0.000225
2,3,7,8-TCDF	<ML
1 Pounds per thousand lb of product.
2 The pretreatment standards for these parameters apply only when sintering wastewater is co-treated with ironmaking wastewater.
3 The pretreatment standards for ammonia are not applicable to sources that discharge to a POTW with nitrification capability (defined at § 420.02(s) ).

(b) Sintering operations with dry air pollution control system. There shall be no discharge of process wastewater pollutants to POTWs.

[67 FR 64265, Oct. 17, 2002]