{"data":{"id":"us/40-cfr-471.85","jurisdiction":"us","citation":"40 CFR 471.85","heading":"Pretreatment standards for new sources (PSNS).","body":"Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources (PSNS). The mass of the wastewater introduced into a POTW shall not exceed the following values:\n(a) Rolling spent neat oils—subpart H—PSNS. There shall be no discharge of process wastewater pollutants.\n(b) Rolling spent emulsions.\nSubpart H—PSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of zinc rolled with emulsions\nChromium 0.0005 0.0002\nCopper 0.002 0.0009\nCyanide 0.0003 0.0001\nZinc 0.002 0.0006\n(c) Rolling contact cooling water.\nSubpart H—PSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of zinc rolled with contact cooling water\nChromium 0.020 0.008\nCopper 0.069 0.033\nCyanide 0.011 0.004\nZinc 0.055 0.023\n(d) Drawing spent emulsions.\nSubpart H—PSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of zinc drawn with emulsions\nChromium 0.002 0.0009\nCopper 0.008 0.004\nCyanide 0.001 0.0005\nZinc 0.006 0.003\n(e) Direct chill casting contact cooling water.\nSubpart H—PSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of zinc cast by the direct chill method\nChromium 0.019 0.008\nCopper 0.065 0.031\nCyanide 0.010 0.004\nZinc 0.052 0.021\n(f) Stationary casting contact cooling water—subpart H—PSNS. There shall be no discharge of process wastewater pollutants.\n(g) Heat treatment contact cooling water.\nSubpart H—PSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of zinc heat treated\nChromium 0.029 0.012\nCopper 0.098 0.047\nCyanide 0.016 0.006\nZinc 0.078 0.032\n(h) Surface treatment spent baths.\nSubpart H—PSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of zinc surface treated\nChromium 0.033 0.014\nCopper 0.114 0.054\nCyanide 0.018 0.007\nZinc 0.091 0.038\n(i) Surface treatment rinse.\nSubpart H—PSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of zinc surface treated\nChromium 0.133 0.054\nCopper 0.459 0.219\nCyanide 0.072 0.029\nZinc 0.365 0.151\n(j) Alkaline cleaning spent baths.\nSubpart H—PSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of zinc alkaline cleaned\nChromium 0.002 0.0006\nCopper 0.005 0.002\nCyanide 0.0007 0.0003\nZinc 0.004 0.002\n(k) Alkaline cleaning rinse.\nSubpart H—PSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of zinc alkaline cleaned\nChromium 0.626 0.254\nCopper 2.17 1.03\nCyanide 0.338 0.134\nZinc 1.73 0.710\n(l) Sawing or grinding spent emulsions.\nSubpart H—PSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of zinc sawed or ground with emulsions\nChromium 0.009 0.004\nCopper 0.031 0.015\nCyanide 0.005 0.002\nZinc 0.025 0.010\n(m) Electrocoating rinse.\nSubpart H—PSNS\nPollutant or pollutant property Maximum for any 1 day Maximum for monthly average\nmg/off-kg (pounds per million off-pounds) of zinc electrocoated\nChromium 0.085 0.035\nCopper 0.293 0.140\nCyanide 0.046 0.019\nZinc 0.234 0.096\n(n) Decreasing spent solvents—subpart H—PSNS. There shall be no discharge of process wastewater pollutants.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS","PART 471—NONFERROUS METALS FORMING AND METAL POWDERS POINT SOURCE CATEGORY","Subpart H—Zinc Forming 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":"c1b9a745d14aa8ba314100c051f6e8975b8327e4ff014699c236f8bf1d58a0e0","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-471.84","next":"us/40-cfr-471.86"},"notice":"GroundRules: Original legal text. Not legal advice."}