40 C.F.R. § 429.55 Pretreatment standards for existing sources (PSES).
Title 40 - Protection of Environment
Any existing source subject to this subpart which introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403.
Title 40: Protection of Environment
PART 429—TIMBER PRODUCTS PROCESSING POINT SOURCE CATEGORY
Subpart D—Dry Process Hardboard Subcategory
§ 429.55 Pretreatment standards for existing sources (PSES).