{"data":{"id":"us/40-cfr-429.95","jurisdiction":"us","citation":"40 CFR 429.95","heading":"Pretreatment standards for existing sources (PSES).","body":"Except as provided in 40 CFR 403.7 and 403.13, 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 and meet the following pretreatment standards for existing sources (PSES):\nSubpart H\n[PSES Effluent Limitations]\nPollutant or pollutant property Maximum for any 1 day (mg/l)\nOil and grease 100\nCopper 5\nChromium 4\nArsenic 4\nIn cases where POTWs find it necessary to impose mass limitations, the following equivalent mass limitations are provided as guidance.\nSubpart H\n[PSES Effluent Limitations; grams per cu m of production]\nPollutant or pollutant property Maximum for any 1 day\nOil and grease 20.5\nCopper .62\nChromium .41\nArsenic .41","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 429—TIMBER PRODUCTS PROCESSING POINT SOURCE CATEGORY","Subpart H—Wood Preserving—Boulton Subcategory"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"c231c886061186b0f49f6518e749ef5f13bcc42eea14c4262d100a2277287033","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-429.94","next":"us/40-cfr-429.96"},"notice":"GroundRules: Original legal text. Not legal advice."}