§ 431.16 - 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 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 existing sources (PSES) 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. PSES must be attained on or before July 1, 1984.

Subpart APollutant or pollutant propertyPSESMaximum for any 1 dayMilligrams per liter (mg/l)Pentachlorophenol(0.032)(14.4)/yTrichlorophenol(0.010)(14.4)/yy=wastewater discharged 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 propertyPSESMaximum 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)