§ 431.17 - Pretreatment standards for new sources (PSNS).

(a) Except as provided in 40 CFR 403.7, any new source subject to this subpart that introduces pollutants into a publicly owned treatment works must (1) comply with 40 CFR part 403 and (2) achieve the following pretreatment standards for new sources (PSNS) if it uses chlorophenolic-containing biocides. Permittees not using chlorophenolic-containing biocides must certify to the permit-issuing authority that they are not using these biocides.

Subpart APollutant or pollutant propertyPSNSMaximum for any 1 dayMilligrams per liter (mg/l)Pentachlorophenol(0.171)(2.7)/yTrichlorophenol(0.053)(2.7)/yy=wastewater discharge in kgal per ton of product.

(b) In cases when POTWs find it necessary to impose mass effluent limitations, the following equivalent mass limitations are provided as guidance:

Subpart APollutant or pollutant propertyPSNSMaximum for any 1 dayKg/kkg (or pounds per 1,000 lb) of productPentachlorophenol0.0019Trichlorophenol0.00060 (Approved by the Office of Management and Budget under control number 2040-0033)