The permit authority will obtain the average process water usage flow rate for the finishing water processes from the permittee. 8 463.31 Specialized definitions. For the purpose of this subpart: (a) The “average process water usage flow rate" of a finishing water process in liters per day is equal to the volume of process water (liters) used per year by a process divided by the number of days per year the process operates. The “average process water usage flow rate" for a plant with more than one plastics molding and forming process that uses finishing water is the sum of the "average process water usage flow rates” for the finishing processes. (b) The “volume of process water used per year” is the volume of process water that flows through a finishing water process and comes in contact with the plastics product over a period of one year. 8 463.33 Effluent limitations guidelines representing the degree of effluent reduction attainable by the applica. tion of the best available tech. nology economically achievable. (a) The BAT effluent limitations guidelines for bis(2-ethylhexyl) phthalate, di-n-butyl phthalate, and dimethyl phthalate are reserved. (b) The Agency has determined that, with the exception of bis(2-ethylhexyl) phthalate, di-n-butyl phthalate, and dimethyl phthalate, there are no toxic pollutants in treatable concentrations in finishing waters. Accordingly, the Agency is promulgating BAT effluent limitations guidelines equal to BPT effluent limitations guidelines. $ 463.34 New source performance standards. (a) NSPS for bis(2-ethylhexyl) phthalate, di-n-butyl phthalate, and dimethyl phthalate are reserved. (b) Any new source subject to this subpart must achieve performance standards (i.e., mass of pollutant discharged), which are calculated by multiplying the average process water usage flow rate for the finishing water processes at a new source times the following pollutant concentrations: 8 463.32 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available. Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the effluent limitations guidelines (i.e., of pollutant discharged) representing the degree of effluent reduction attainable by the application of the best practicable con mass Subpart A-Aluminum Casting Subcategory 464.10 Applicability; description of the alu minum casting subcategory. 464.11 Specialized definitions. 464.12 Effluent limitations guidelines rep resenting the degree of effluent reduction attainable by the application of the best practicable control technology currently available. 464.13 Effluent limitations guidelines rep resenting the degree of effluent reduction attainable by the application of the best available technology economically achievable. 464.14 New source performance standards. 464.15 Pretreatment standards for existing sources. 464.16 Pretreatment standards for new sources. 464.17 Effluent limitations guidelines rep resenting the degree of effluent reduction attainable by the application of the best conventional pollutant control technology. [Reserved] $ 463.35 Pretreatment standards for existing sources. (a) PSES for bis(2-ethylhexyl) phthalate, di-n-butyl phthalate, and dimethyl phthalate are reserved. (b) Any existing source subject to this subpart that introduces pollutants into a publicly owned treatment works must comply with 40 CFR Part 403 General Pretreatment Regulations. $ 463.36 Pretreatment standards for new sources. (a) PSNS for bis(2-ethylhexyl) phthalate, di-n-butyl phthalate, and dimethyl phthalate are reserved. (b) Any new source subject to this subpart that introduces pollutants into a publicly owned treatment works must comply with 40 CFR Part 403 General Pretreatment Regulations. Subpart B-Copper Casting Subcategory 464.20 Applicability; description of the cop per casting subcategory. 464.21 Specialized definitions. 464.22 Effluent limitations guidelines rep resenting the degree of effluent reduction attainable by the application of the best practicable control technology currently available. 464.23 Effluent limitations guidelines rep resenting the degree of effluent reduction attainable by the application of the best available technology economically achievable. 464.24 New source performance standards. 464.25 Pretreatment standards for existing sources. 464.26 Pretreatment standards for sources. 464.27 Effluent limitations guidelines rep resenting the degree of effluent reduction attainable by the application of the best conventional pollutant control technology. (Reserved] new $ 463.37 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology. [Reserved) PART 464-METAL MOLDING AND CASTING POINT SOURCE CATEGORY GENERAL PROVISIONS Sec. 464.01 Applicability. 464.02 General definitions. 464.03 Monitoring and reporting require ments. 464.04 Compliance date for PSES. Subpart C-Ferrous Casting Subcategory 464.30 Applicability; description of the fer rous casting subcategory. 464.31 Specialized definitions. 464.32 Effluent limitations guidelines rep resenting the degree of effluent reduction attainable by the application of the best practicable control technology currently available. 464.33 Effluent limitations guidelines rep resenting the degree of effluent reduction attainable by the application of the best available technology economically achievable. 464.34 New source performance standards. 464.35 Pretreatment standards for existing sources. 464.36 Pretreatment standards for new sources. 464.37 Effluent limitations guidelines rep resenting the degree of effluent reduction attainable by the application of the best conventional pollutant control technology. (Reserved] Subpart D-Zinc Casting Subcategory 464.40 Applicability; description of the zinc casting subcategory. 464.41 Specialized definitions. 464.42 Effluent limitations guidelines rep resenting the degree of effluent reduction attainable by the application of the best practicable control technology currently available. 464.43 Effluent limitations guidelines rep resenting the degree of effluent reduction attainable by the application of the best available technology economically achievable. 464.44 New source performance standards. 464.45 Pretreatment standards for existing sources. 464.46 Pretreatment standards for sources. 464.47 Effluent limitations guidelines rep resenting the degree of effluent reduction attainable by the application of the best conventional pollutant control tech nology. [Reserved] AUTHORITY: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307, 308, and 501 of the Clean Water Act (Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) (the "Act”); 33 U.S.C. 1311, 1314 (b), (c), (e) and (g), 1316 (b) and (c), 1317 (b) and (c), 1318, and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217. new (a) Aluminum casting. The remelting of aluminum or an aluminum alloy to form a cast intermediate or final product by pouring or forcing the molten metal into a mold, except for ingots, pigs, or other cast shapes related to nonferrous (primary and secondary) metals manufacturing (40 CFR part 421) and aluminum forming (40 CFR part 467). Processing operations following the cooling of castings not covered under aluminum forming, except for grinding scrubber operations which are covered here, are covered under the electroplating and metal finishing point source categories (40 CFR parts 413 and 433). (b) Copper casting. The remelting of copper or a copper alloy to form a cast intermediate or final product by pouring or forcing the molten metal into a mold, except for ingots, pigs, or other cast shapes related to nonferrous (primary and secondary) metals manufacturing (40 CFR part 421). Also excluded are casting of beryllium alloys in which beryllium is present at 0.1 or greater percent by weight and precious metals alloys in which the precious metal is present at 30 or greater percent by weight. Except for grinding scrubber operations which are covered here, processing operations following the cooling of castings are covered under the electroplating and metal finishing point source categories (40 CFR parts 413 and 433). (c) Ferrous casting. The remelting of ferrous metals to form a cast intermediate or finished product by pouring the molten metal into a mold. Except for grinding scrubber operations which are covered here, processing operations following the cooling of castings are covered under the electroplating and metal finishing point source categories (40 CFR parts 413 and 433). (d) Zinc casting. The remelting of zinc or zinc alloy to form a cast intermediate or final product by pouring or forcing the molten metal into a mold, except for ingots, pigs, or other cast shapes related to nonferrous (primary) metals manufacturing (40 CFR part 421) and nonferrous metals forming (40 CFR part 471). Processing operations following the cooling of castings not covered under nonferrous metals forming are covered under the electroplating SOURCE: 50 FR 45247, Oct. 30, 1985, unless otherwise noted. GENERAL PROVISIONS 8 464.01 Applicability. (a) This part applies to metal molding and casting facilities that discharge or may discharge pollutants to waters of the United States or that introduce pollutants into a publicly owned treatment works. $ 464.02 General definitions. In addition to the definitions set forth in 40 CFR part 401, the following definitions apply to this part: mean and metal finishing point source categories (40 CFR parts 413 and 433). (e) POTW shall "publicly owned treatment works." (f) A non-continuous discharger is a plant which does not discharge pollutants during specific periods of time for reasons other than treatment plant upset, such periods being at least 24 hours in duration. A typical example of a non-continuous discharger is a plant where wastewaters are routinely stored for periods in excess of 24 hours to be treated on a batch basis. For non-continuous discharging direct discharging plants, NPDES permit authorities shall apply the mass-based annual average effluent limitations or standards and the concentration-based maximum day and maximum for monthly average effluent limitations or standards established in the regulations. POTWs may elect to establish concentration-based standards for non-continuous discharges to POTWs. They may do so by establishing concentration-based pretreatment standards equivalent to the mass-based standards provided in $8 464.15, 464.16, 464.25, 464.26, 464.35, 464.36, 464.45, and 464.46 of the regulations. Equivalent concentration standards may be established by following the procedures outlined in § 464.03(b). (g) Total phenols shall mean total phenolic compounds as measured by the procedure listed in 40 CFR part 136 (distillation followed by colorimetric4AAP). (h) Sm3 shall mean standard cubic meters. (i) SCF shall means standard cubic feet. (j) Total toric organics (TTO) shall mean the sum of the mass of each of the toxic organic compounds which are found at a concentration greater than 0.010 mg/1. The specialized definitions for each subpart contain a discrete list of toxic organic compounds comprising TTO for each process segment in which TTO is regulated. standard shall be considered equivalent to complying with the TTO standard. Alternate Oil and Grease standards are provided as substitutes for the TTO standards provided in SS 464.15, 464.16, 464.25, 464.26, 464.35, 464.36, 464.45, and 464.46. (b) POTWs may establish concentration standards rather than mass standards, but must ensure that the concentration standards are exactly equivalent to the mass-based standards provided in $$ 464.15, 464.16, 464.25, 464.26, 464.35, 464.36, 464.45, and 464.46. Equivalent concentration standards may be determined by multiplying the massbased standards included in the regulations by an appropriate measurement of average production, raw material usage, or air scrubber flow (kkg of metal poured, kkg of sand reclaimed, or standard cubic meters of air scrubbed) and dividing by an appropriate measure of average discharge flow to the POTW, taking into account the proper conversion factors to ensure that the units (mg/l) are correct. (c) The “monthly average” regulatory values shall be the basis for the monthly average effluent limitations guidelines and standards in direct discharge permits and for pretreatment standards. Compliance with the monthly average effluent limitations guidelines and standards is required regardless of the number of samples analyzed and averaged. $ 464.04 Compliance date for PSES. The compliance date of PSES is October 31, 1988. $ 464.03 Monitoring and reporting re quirements. (a) As an alternative to monitoring for TTO (total toxic organics), an indirect discharging plant may elect to monitor for Oil and Grease instead. Compliance with the Oil and Grease (§ 464.15) and PSNS (8 464.16) for the aluminum subcategory and is comprised of a discrete list of toxic organic pollutants for each process segment where it is regulated, as follows: (1) Casting Quench ( 464.15(b) and $ 464.16(b)): 4. benzene (2) Die Casting (8 464.15(c) and 8 464.16(c)): 1. acenaphthene 4. benzene 7. chlorobenzene 11. 1,1,1-trichloroethane 21. 2,4,6-trichlorophenol 22. para-chloro meta-cresol 23. chloroform (trichloromethane) 34. 2,4-dimethylphenol 39. fluoranthene 44. methylene chloride (dichloromethane) 55. naphthalene 65. phenol 66. bis(2-ethylhexyl) phthalate 67. butyl benzyl phthalate 68. di-n-butyl phthalate 70. diethyl phthalate 72. benzo (a)anthracene (1,2-benzanthracene) 73. benzo (a)pyrene (3,4-benzopyrene) 76. chrysene 78. anthracene 80. fluorene 81. phenanthrene 84. pyrene 85. tetrachloroethylene 86. toluene (3) Dust Collection Scrubber (8 464.15(d) and § 464.16(d)): 1. acenaphthene 21. 2,4,6-trichlorophenol 23. chloroform (trichloromethane) 34. 2,4-dimethylphenol 39. fluoranthene 44. methylene chloride (dichloromethane) 65. phenol 66. bis (2-ethylhexyl) phthalate 68. di-n-butyl phthalate 70. diethyl phthalate 73. benzo (a)pyrene (3,4-benzopyrene) 84. pyrene (4) Investment Casting (§ 464.15(f) and $ 464.16(f)); 11. 1,1,1-trichloroethane 23. chloroform (trichloromethane) 44. methylene chloride (dichloromethane) 66. bis (2-ethylhexyl) phthalate 84. pyrene 85. tetrachloroethylene 87. trichloroethylene (5) Melting Furnace Scrubber (8 464.15(g) and § 464.16(g)): 1. acenaphthene 21. 2,4,6-trichlorophenol 23. chloroform (trichloromethane) 34. 2,4-dimethylphenol 39. fluoranthene 44. methylene chloride (dichloromethane) 65. phenol 66. bis (2-ethylhexyl) phthalate 68. di-n-butyl phthalate 70. diethyl phthalate 73. benzo (a)pyrene (3,4-benzopyrene) 84. pyrene (6) Mold Cooling (8 464.15(h) and $ 464.16(h)); 4. benzene 21. 2,4,6-trichlorophenol 22. para-chloro meta-cresol 23. chloroform (trichloromethane) 34. 2,4-dimethylphenol 39. fluoranthene 44. methylene chloride 65. phenol 66. bis(2-ethylhexyl) phthalate 67. butyl benzyl phthalate 84. pyrene 85. tetrachloroethylene 87. trichloroethylene $ 464.12 Effluent limitations guidelines representing the degree of effluent reduction attainable by the applica tion of the best practicable control technology currently available. Except as provided in 40 CFR 125.30 through 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, except that non-continuous dischargers shall not be subject to the maximum day and maximum for monthly average mass (kg/1,000 kkg or lb/million lb of metal poured; kg/62.3 million Sm3 or 1b/ billion SCF of air scrubbed) effluent limitations for copper, lead, zinc, total phenols, oil and grease, and TSS. For |
