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CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS (Parts 400–471) > PART 420—IRON AND STEEL MANUFACTURING POINT SOURCE CATEGORY > SUBPART K—Alkaline Cleaning Subcategory (§420.110 to §420.117) > 420.115—Pretreatment standards for existing sources (PSES).
420.115—Pretreatment standards for existing sources (PSES).
Any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403.