{"data":{"id":"us/40-cfr-435.42","jurisdiction":"us","citation":"40 CFR 435.42","heading":"Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).","body":"Except as provided in 40 CFR 125.30-125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.\nBPT Effluent Limitations—Oil and Grease\n[In milligrams per liter]\nPollutant parameter waste source Maximum for any 1 day Average of values for 30 consecutive days shall not exceed Residual chlorine minimum for any 1 day\nProduced water 72 48 NA\nDeck drainage (1) (1) NA\nWater-based:\nDrilling fluids (1) (1) NA\nDrill Cuttings (1) (1) NA\nNon-aqueous:\nDrilling fluids No discharge No discharge NA\nDrill Cuttings (1) (1) NA\nWell treatment, workover, and completion fluids (1) (1) NA\nSanitary:\nM10 NA NA 2 1\nM9IM 3 NA NA NA\nDomestic 3 NA NA NA\nProduced sand Zero discharge Zero discharge NA\n1 No discharge of free oil. See § 435.41(y).\n2 Minimum of 1 mg/l and maintained as close to this concentration as possible.\n3 There shall be no floating solids as a result of the discharge of these wastes.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 435—OIL AND GAS EXTRACTION POINT SOURCE CATEGORY","Subpart D—Coastal 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":"ba105258832b5ef557e4e95881284248f292e8103c877037baea5c31e0817f5e","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-435.41","next":"us/40-cfr-435.43"},"notice":"GroundRules: Original legal text. Not legal advice."}