420.23—Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available control technology economically achievable (BAT).

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

Subpart B—Effluent Limitations (BAT)

Regulated parameter	Maximum daily 1	Maximum monthly avg. 1
Ammonia-N 2	0.0150	0.00501
Cyanide 2	0.00300	0.00150
Lead	0.000451	0.000150
Phenols (4AAP) 2	0.000100	0.0000501
2,3,7,8-TCDF	<ML
TRC 3	0.000250
Zinc	0.000676	0.000225
1 Pounds per thousand lb of product.
2 Limits for these parameters apply only when sintering waste water is co-treated with ironmaking wastewater.
3 Applicable only when sintering process wastewater is chlorinated.

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

[67 FR 64264, Oct. 17, 2002]