Pretreatment standards for existing sources (PSES)

Pretreatment standards for existing sources (PSES). (1) Except as provided in s. NR 252.04 and 40 CFR 403.7 and 403.13 , any existing source subject to this subcategory which introduces process wastewater pollutants into a publicly owned treatment works shall comply with 40 CFR Part 403 , and achieve the following pretreatment standards: (2) Any existing source subject to this subcategory which processes less than 275 hides/day shall comply with sub. (1) , except that the total chromium limitations contained in sub. (1) do not apply.