PART 424—FERROALLOY MANUFACTURING POINT SOURCE CATEGORY Authority: Secs. 301, 304(b) and (c), 306(b) and (c), 307(c) of the Federal Water Pollution Control Act, as amended; 33 U.S.C. 1251, 1311, 1314(b) and (c), 1316 (b) and (c), 1317(c); 86 Stat. 816 et seq., Source: 39 FR 6809, Feb. 22, 1974, unless otherwise noted. Subpart A—Open Electric Furnaces With Wet Air Pollution Control Devices Subcategory § 424.10 Applicability; description of the open electric furnaces with wet air pollution control devices subcategory. The provisions of this subpart are applicable to discharges resulting from the smelting of ferroalloys in open electric furnaces with wet air pollution control devices. This subcategory includes those electric furnaces of such construction or configuration that the furnace off-gases are burned above the furnace charge level by air drawn into the system. After combustion the gases are cleaned in a wet air pollution control device, such as a scrubber, an electrostatic precipitator with water or other aqueous sprays, etc. The provisions of this subpart are not applicable to noncontact cooling water or to those electric furnaces which are covered, closed, sealed, or semi-covered and in which the furnace off-gases are not burned prior to collection (regulated in subpart B of this part). § 424.11 Specialized definitions. For the purpose of this subpart: (a) Except as provided below, the general definitions, abbreviations and methods of analysis set forth in 40 CFR part 401 shall apply to this subpart. (b) The term Mwh § 424.12 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 §§ 125.30 through 125.32, and subject to the provisions of paragraph (a) of this section, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT): Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/Mwh) TSS 0.319 0.160 Chromium total .006 .0032 Chromium VI .0006 .0003 Manganese total .064 .032 pH ( 1 ( 1 English units (lb/Mwh) TSS .703 .352 Chromium total .014 .007 Chromium VI .0014 .0007 Manganese total .141 .070 pH ( 1 ( 1 1 [39 FR 6809, Feb. 22, 1974, as amended at 60 FR 33957, June 29, 1995] § 424.13 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable. The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a point source subject to the provisions of this subpart after application of the best available technology economically achievable: Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/Mwh) Chromium total 0.0008 0.0004 Chromium VI .00008 .00004 Manganese total .008 .0039 English units (lb/Mwh) Chromium total .0017 .0009 Chromium VI .0002 .0001 Manganese total .017 .0086 [44 FR 50744, Aug. 29, 1979] § 424.14 [Reserved] § 424.15 Standards of performance for new sources. The following standards of performance establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a new source subject to the provisions of this subpart: Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/Mwh) TSS 0.024 0.012 Chromium total .0008 .0004 Chromium VI .00008 .00004 Manganese total .008 .0039 pH ( 1 ( 1 English units (lb/Mwh) TSS .052 .026 Chromium total .0017 .0009 Chromium VI .0002 .0001 Manganese total .017 .0086 pH ( 1 ( 1 1 § 424.16 Pretreatment standards for new sources. Any new source subject to this subpart that introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403. [60 FR 33957, June 29, 1995] § 424.17 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology. Except as provided in §§ 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT): The limitations shall be the same as those specified for conventional pollutants (which are defined in § 401.16) in § 424.12 of this subpart for the best practicable control technology currently available (BPT). [51 FR 25000, July 9, 1986] Subpart B—Covered Electric Furnaces and Other Smelting Operations With Wet Air Pollution Control Devices Subcategory § 424.20 Applicability; description of the covered electric furnaces and other smelting operations with wet air pollution control devices subcategory. The provisions of this subpart are applicable to discharges resulting from the smelting of ferroalloys in covered electric furnaces or other smelting operations, not elsewhere included in this part, with wet air pollution control devices. This subcategory includes those electric furnaces of such construction or configuration (known as covered, closed, sealed, semi-covered or semi-closed furnaces) that the furnace off-gases are not burned prior to collection and cleaning, and which off-gases are cleaned after collection in a wet air pollution control device such as a scrubber, ‘wet’ baghouse, etc. This subcategory also includes those non- electric furnace smelting operations, such as exothermic ( i.e. § 424.21 Specialized definitions. For the purpose of this subpart: (a) Except as provided below, the general definitions, abbreviations and methods of analysis set forth in part 401 of this chapter shall apply to this subpart. (b) The term Mwh § 424.22 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 §§ 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT): Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/Mwh) TSS 0.419 0.209 Chromium total .008 .004 Chromium VI .0008 .0004 Manganese total .084 .042 Cyanide total .004 .002 Phenols .006 .004 pH ( 1 ( 1 English units (lb/Mwh) TSS .922 .461 Chromium total .018 .009 Chromium VI .0018 .0009 Manganese total .184 .092 Cyanide total .009 .005 Phenols .013 .009 pH ( 1 ( 1 1 Provided, however, [39 FR 6809, Feb. 22, 1974, as amended at 39 FR 17841, May 21, 1974; 60 FR 33957, June 29, 1995] § 424.23 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable. The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a point source subject to the provisions of this subpart after application of the best available technology economically achievable: Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/Mwh) Chromium total 0.001 0.0005 Chromium VI .0001 .00005 Manganese total .011 .005 Cyanide total .0005 .0003 Phenols .0004 .0002 English units (lb/Mwh) Chromium total .002 .0012 Chromium VI .0002 .0001 Manganese total .023 .012 Cyanide total .001 .0006 Phenols .0009 .0005 Provided, however, [44 FR 50744, Aug. 29, 1979] § 424.24 [Reserved] § 424.25 Standards of performance for new sources. The following standards of performance establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a new source subject to the provisions of this subpart: Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/Mwh) TSS 0.032 0.016 Chromium total .001 .0005 Chromium VI .0001 .00005 Manganese total .011 .005 Cyanide total .0005 .0003 Phenols .0004 .0002 pH ( 1 ( 1 English units (lb/Mwh) TSS .071 .035 Chromium total .002 .0012 Chromium VI .0002 .0001 Manganese total .023 .012 Cyanide total .001 .0006 Phenols .0009 .0005 pH ( 1 ( 1 1 Provided, however, [39 FR 6809, Feb. 22, 1974, as amended at 39 FR 17841, May 21, 1974] § 424.26 Pretreatment standards for new sources. Any new source subject to this subpart that introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403. [60 FR 33957, June 29, 1995] § 424.27 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology. Except as provided in §§ 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT): The limitations shall be the same as those specified for conventional pollutants (which are defined in § 401.16) in § 424.22 of this subpart for the best practicable control technology currently available (BPT). [51 FR 25000, July 9, 1986] Subpart C—Slag Processing Subcategory § 424.30 Applicability; description of the slag processing subcategory. The provisions of this subpart are applicable to discharges resulting from slag processing, wherein: (a) The residual metallic values in the furnace slag are recovered via concentration for return to the furnace, or (b) the slag is “shotted” for other further use. § 424.31 Specialized definitions. For the purpose of this subpart: (a) Except as provided below, the general definitions, abbreviations and methods of analysis set forth in part 401 of this chapter shall apply to this subpart. § 424.32 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 §§ 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT): Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/kkg processed) TSS 2.659 1.330 Chromium total 0.053 0.026 Manganese total .532 .266 pH ( 1 ( 1 English units (lb/ton processed) TSS 5.319 2.659 Chromium total 0.106 0.053 Manganese total 1.064 .532 pH ( 1 ( 1 1 [39 FR 6809, Feb. 22, 1974, as amended at 60 FR 33957, June 29, 1995] § 424.33 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable. The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a point source subject to the provisions of this subpart after application of the best available technology economically achievable: Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/kkg processed) Chromium total 0.0054 0.0027 Manganese total .054 .027 English units (lb/ton of raw material) Chromium total .011 .0054 Manganese total .108 .054 [44 FR 50745, Aug. 29, 1979] § 424.34 [Reserved] § 424.35 Standards of performance for new sources. The following standards of performance establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a new source subject to the provisions of this subpart: Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/kkg processed) TSS 0.271 0.136 Chromium total .0054 .0027 Manganese total 0.054 .027 pH ( 1 ( 1 English units (lb/ton processed) TSS .542 .271 Chromium total .011 .0054 Manganese total .108 .054 pH ( 1 ( 1 1 § 424.36 Pretreatment standards for new sources. Any new source subject to this subpart that introduces process wastewater pollutants into a publicly owned treatment works must comply with 40 CFR part 403. [60 FR 33957, June 29, 1995] § 424.37 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology. Except as provided in §§ 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT): The limitations shall be the same as those specified for conventional pollutants (which are defined in § 401.16) in § 424.32 of this subpart for the best practicable control technology currently available (BPT). [51 FR 25000, July 9, 1986] Subpart D—Covered Calcium Carbide Furnaces With Wet Air Pollution Control Devices Subcategory Source: 40 FR 8035, Feb. 24, 1975, unless otherwise noted. § 424.40 Applicability; description of the covered calcium carbide furnaces with wet air pollution control devices subcategory. The provisions of this subpart are applicable to discharges resulting from the production of calcium carbide in covered electric furnaces which use wet air pollution control devices. This subcategory includes those electric furnaces of such construction or configuration (known as covered, closed, sealed, semi-covered or semi-closed furnaces) that the furnace off-gases are not burned prior to collection and cleaning, and which off-gases are cleaned after collection in a wet air pollution control device such as a scrubber, ‘;wet’ baghouse, etc. This subcategory does not include noncontact cooling water or those furnaces which utilize dry dust collection techniques, such as dry baghouses. § 424.41 Specialized definitions. For the purpose of this subpart: (a) Except as provided below, the general definitions, abbreviations and methods of analysis set forth in 40 CFR part 401 shall apply to this subpart. § 424.42 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 §§ 125.30 through 125.32, and subject to the provisions of paragraph (a) of this section, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT): Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/kkg of product) TSS 0.380 0.190 Total Cyanide .0056 .0028 pH ( 1 ( 1 English units (lb/1000 lb of product) TSS .380 .190 Total Cyanide .0056 .0028 pH ( 1 ( 1 1 [40 FR 8035, Feb. 24, 1975, as amended at 60 FR 33957, June 29, 1995] § 424.43 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable. The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a point source subject to the provisions of this subpart after application of the best available technology economically achievable: Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/kkg of product) Total Cyanide 0.0056 0.0028 English units (lb/1000 lb of product) Total Cyanide .0056 .0028 [44 FR 50745, Aug. 29, 1979] §§ 424.44-424.46 [Reserved] § 424.47 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology. Except as provided in §§ 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT): The limitations shall be the same as those specified for conventional pollutants (which are defined in § 401.16) in § 424.42 of this subpart for the best practicable control technology currently available (BPT). [51 FR 25000, July 9, 1986] Subpart E—Other Calcium Carbide Furnaces Subcategory Source: 40 FR 8035, Feb. 24, 1975, unless otherwise noted. § 424.50 Applicability; description of the other calcium carbide furnaces subcategory. The provisions of this subpart are applicable to discharges resulting from the production of calcium carbide in those covered furnaces which do not utilize wet air pollution control methods. Covered calcium carbide furnaces using wet air pollution control devices are regulated in subpart D of this part. Open (uncovered) calcium carbide furnaces are regulated in part 415, inorganic chemicals manufacturing point source category (39 FR 9612). § 424.51 Specialized definitions. For the purpose of this subpart: (a) Except as provided below, the general definitions, abbreviations and methods of analysis set forth in 40 CFR part 401 shall apply to this subpart. § 424.52 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 §§ 125.30 through 125.32, and subject to the provisions of paragraph (a) of this section, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT): There shall be no discharge of process waste water pollutants to navigable waters. [60 FR 33957, June 29, 1995] § 424.53 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable. The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a point source subject to the provisions of the best available technology economically achievable: There shall be no discharge of process waste water pollutants to navigable waters. §§ 424.54-424.56 [Reserved] § 424.57 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology. The following limitations establish the quantity or quality of pollutants or pollutant properties, which may be discharged by a point source subject to the provisions of this subpart after application of the best conventional pollutant control technology: There shall be no discharge of process waste water pollutants to navigable waters. [44 FR 50745, Aug. 29, 1979] Subpart F—Electrolytic Manganese Products Subcategory Source: 40 FR 8036, Feb. 27, 1975, unless otherwise noted. § 424.60 Applicability; description of the electrolytic manganese products subcategory. The provisions of this subpart are applicable to discharges resulting from the manufacture of electrolytic manganese products such as electrolytic manganese metal or electrolytic manganese dioxide. § 424.61 Specialized definitions. For the purpose of this subpart: (a) Except as provided below, the general definitions, abbreviations and methods of analysis set forth in 40 CFR part 401 shall apply to this subpart. (b) [Reserved] § 424.62 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 §§ 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT): (a) The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section which may be discharged by a point source subject to the provisions of this subpart producing electrolytic manganese after application of the best practicable control technology currently available: Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/kkg of product) TSS 6.778 3.389 Manganese 2.771 1.356 Ammonia-N 40.667 20.334 pH ( 1 ( 1 English units (lb/1,000 lb of product) TSS 6.778 3.389 Manganese 2.771 1.356 Ammonia-N 40.667 20.334 pH ( 1 ( 1 1 (b) The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a point source subject to the provisions of this subpart producing electrolytic manganese dioxide after application of the best practicable control technology currently available: Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/kkg of product) TSS 1.762 0.881 Manganese 0.705 .352 Ammonia-N 10.574 5.287 pH ( 1 ( 1 English units (lb/1,000 lb of product) TSS 1.762 .881 Manganese .705 .352 Ammonia-N 10.574 5.287 pH ( 1 ( 1 1 [40 FR 8036, Feb. 27, 1975, as amended at 60 FR 33957, June 29, 1995] § 424.63 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable. (a) The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a point source subject to the provisions of this subpart producing electrolytic manganese after application of the best available technology economically achievable: Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/kkg of product) Manganese 0.678 0.339 Ammonia-N 6.778 3.389 English units (lb/1,000 lb of product) Manganese 0.678 0.339 Ammonia-N 6.778 3.389 (b) The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a point source subject to the provisions of this subpart producing electrolytic manganese dioxide after application of the best available technology economically achievable: Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/kkg of product) Manganese 0.176 0.088 Ammonia-N 1.762 .881 English units (lb/1,000 lb of product) Manganese 0.176 0.088 Ammonia-N 1.762 .881 [44 FR 50745, Aug. 29, 1979] §§ 424.64-424.66 [Reserved] § 424.67 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology. Except as provided in §§ 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT): The limitations shall be the same as those specified for conventional pollutants (which are defined in § 401.16) in § 424.62 of this subpart for the best practicable control technology currently available (BPT). [51 FR 25000, July 9, 1986] Subpart G—Electrolytic Chromium Subcategory Source: 40 FR 8037, Feb. 27, 1975, unless otherwise noted. § 424.70 Applicability; description of the electrolytic chromium subcategory. The provisions of this subpart are applicable to discharges resulting from the manufacture of chromium metal by the electrolytic process. They are not applicable to discharges resulting from the manufacture of chromium metal by aluminothermic or other methods. § 424.71 Specialized definitions. For the purpose of this subpart: (a) Except as provided below, the general definitions, abbreviations and methods of analysis set forth in 40 CFR part 401 shall apply to this subpart. § 424.72 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 §§ 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT): Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/kkg of product) TSS 5.276 2.638 Manganese 2.111 1.055 Chromium 0.106 0.053 Ammonia-N 10.553 5.276 pH ( 1 ( 1 English units (lb/1,000 lb of product) TSS 5.276 2.638 Manganese 2.111 1.055 Chromium 0.106 0.053 Ammonia-N 10.553 5.276 pH ( 1 ( 1 1 [40 FR 8037, Feb. 27, 1975, as amended at 60 FR 33957, June 29, 1995] § 424.73 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable. The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a point source subject to the provisions of this subpart after application of the best available technology economically achievable: Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kg/kkg of product) Manganese 0.530 0.265 Chromium .053 .027 Ammonia-N 5.297 2.649 English units (lb/1,000 lb of product) Manganese 0.530 0.265 Chromium .053 .027 Ammonia-N 5.297 2.649 [44 FR 50746, Aug. 29, 1979] §§ 424.74-424.76 [Reserved] § 424.77 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology. Except as provided in §§ 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT): The limitations shall be the same as those specified for conventional pollutants (which are defined in § 401.16) in § 424.72 of this subpart for the best practicable control technology currently available (BPT). [51 FR 25000, July 9, 1986]