CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS (Parts 400–471) > PART 414—ORGANIC CHEMICALS, PLASTICS, AND SYNTHETIC FIBERS > SUBPART I—Direct Discharge Point Sources That Use End-of-Pipe Biological Treatment (§414.90 to §414.91) > 414.91—Toxic pollutant effluent limitations and standards for direct discharge point sources that use end-of-pipe biological treatment.

414.91—Toxic pollutant effluent limitations and standards for direct discharge point sources that use end-of-pipe biological treatment.

(a) Any point source subject to this subpart must achieve discharges not exceeding the quantity (mass) determined by multiplying the process wastewater flow subject to this subpart times the concentrations in the following table.
(b) In the case of chromium, copper, lead, nickel, zinc, and total cyanide, the discharge quantity (mass) shall be determined by multiplying the concentrations listed in the following table for these pollutants times the flow from metal-bearing waste streams for the metals and times the flow from cyanide bearing waste streams for total cyanide. The metal-bearing waste streams and cyanide-bearing waste streams are defined as those waste streams listed in Appendix A of this part, plus any additional OCPSF process wastewater streams identified by the permitting authority on a case-by-case basis as metal or cyanide bearing based upon a determination that such streams contain significant amounts of the pollutants identified above. Any such streams designated as metal or cyanide bearing must be treated independently of other metal or cyanide bearing waste streams unless the permitting authority determines that the combination of such streams, prior to treatment, with the Appendix A waste streams will result in substantial reduction of these pollutants. This determination must be based upon a review of relevant engineering, production, and sampling and analysis information.
Effluent characteristics Effluent limitations BAT and NSPS 1
Maximum for any one day Maximum for any monthly average
Acenaphthene 59 22
Acenaphthylene 59 22
Acrylonitrile 242 96
Anthracene 59 22
Benzene 136 37
Benzo(a)anthracene 59 22
3,4-Benzofluoranthene 61 23
Benzo(k)fluoranthene 59 22
Benzo(a)pyrene 61 23
Bis(2-ethylhexyl) phthalate 279 103
Carbon Tetrachloride 38 18
Chlorobenzene 28 15
Chloroethane 268 104
Chloroform 46 21
2-Chlorophenol 98 31
Chrysene 59 22
Di-n-butyl phthalate 57 27
1,2-Dichlorobenzene 163 77
1,3-Dichlorobenzene 44 31
1,4-Dichlorobenzene 28 15
1,1-Dichloroethane 59 22
1,2-Dichloroethane 211 68
1,1-Dichloroethylene 25 16
1,2-trans-Dichloroethylene 54 21
2,4-Dichlorophenol 112 39
1,2-Dichloropropane 230 153
1,3-Dichloropropylene 44 29
Diethyl phthalate 203 81
2,4-Dimethylphenol 36 18
Dimethyl phthalate 47 19
4,6-Dinitro-o-cresol 277 78
2,4-Dinitrophenol 123 71
2,4-Dinitrotoluene 285 113
2,6-Dinitrotoluene 641 255
Ethylbenzene 108 32
Fluoranthene 68 25
Fluorene 59 22
Hexachlorobenzene 28 15
Hexachlorobutadiene 49 20
Hexachloroethane 54 21
Methyl Chloride 190 86
Methylene Chloride 89 40
Naphthalene 59 22
Nitrobenzene 68 27
2-Nitrophenol 69 41
4-Nitrophenol 124 72
Phenanthrene 59 22
Phenol 26 15
Pyrene 67 25
Tetrachloroethylene 56 22
Toluene 80 26
Total Chromium 2,770 1,110
Total Copper 3,380 1,450
Total Cyanide 1,200 420
Total Lead 690 320
Total Nickel 3,980 1,690
Total Zinc 2 2,610 1,050
1,2,4-Trichlorobenzene 140 68
1,1,1-Trichloroethane 54 21
1,1,2-Trichloroethane 54 21
Trichloroethylene 54 21
Vinyl Chloride 268 104
1 All units are micrograms per liter.
Code of Federal Regulations 238
2 Total Zinc for Rayon Fiber Manufacture that uses the viscose process and Acrylic Fiber Manufacture that uses the zinc chloride/solvent process is 6,796 µg/l and 3,325 µg/l for maximum for any one day and maximum for monthly average, respectively.
[52 FR 42568, Nov. 5, 1987, as amended at 58 FR 36892, July 9, 1993]