Part 420 - Iron and steel manufacturing point source category

§420.01 Applicability.

(a) The provisions of this part apply to discharges and to the introduction of pollutants into a publicly owned treatment works resulting from production operations in the Iron and Steel Point Source Category.

§420.02 General definitions.

In addition to the definitions set forth in 40 CFR part 401, the following definitions apply to this part:

(a) The term TSS (or total suspended solids, or total suspended residue) means the value obtained by the method specified in 40 CFR 136.3.

(b) The term oil and grease (or O&G) means the value obtained by the method specified in 40 CFR 136.3.

(c) The term ammonia-N (or ammonia-nitrogen) means the value obtained by manual distillation (at pH 9.5) followed by the Nesslerization method specified in 40 CFR 136.3.

(d) The term cyanide means total cyanide and is determined by the method specified in 40 CFR 136.3.

(e) The term phenols 4AAP (or phenolic compounds) means the value obtained by the method specified in 40 CFR 136.3.

(f) The term TRC (or total residual chlorine) means the value obtained by the iodometric titration with an amperometric endpoint method specified in 40 CFR 136.3.

(g) The term chromium means total chromium and is determined by the method specified in 40 CFR 136.3.

(h) The term hexavalent chromium (or chromium VI) means the value obtained by the method specified in 40 CFR 136.3.

(i) The term copper means total copper and is determined by the method specified in 40 CFR 136.3.

(j) The term lead means total lead and is determined by the method specified in 40 CFR 136.3.

(k) The term nickel means total nickel and is determined by the method specified in 40 CFR 136.3.

(l) The term zinc means total zinc and is determined by the method specified in 40 CFR 136.3.

(m) The term benzene (or priority pollutant No. 4) means the value obtained by the standard method Number 602 specified in 44 FR 69464, 69570 (December 3, 1979).

(n) The term benzo(a)pyrene (or priority pollutant No. 73) means the value obtained by the standard method Number 610 specified in 44 FR 69464, 69570 (December 3, 1979).

(o) The term naphthalene (or priority pollutant No. 55) means the value obtained by the standard method Number 610 specified in 44 FR 69464, 69571 (December 3, 1979).

(p) The term tetrachloroethylene (or priority pollutant No. 85) means the value obtained by the standard method Number 610 specified in 44 FR 69464, 69571 (December 3, 1979).

(q) The term pH means the value obtained by the standard method specified in 40 CFR 136.3.

(r) The term non-process wastewaters means utility wastewaters (for example, water treatment residuals, boiler blowdown, and air pollution control wastewaters from heat recovery equipment); treated or untreated wastewaters from groundwater remediation systems; dewatering water for building foundations; and other wastewater streams not associated with a production process.

(s) The term nitrification means oxidation of ammonium salts to nitrites (via Nitrosomas bacteria) and the further oxidation of nitrite to nitrate via Nitrobacter bacteria. Nitrification can be accomplished in either:

(1) A single or two-stage activated sludge wastewater treatment system; or

(2) Wetlands specifically developed with a marsh/pond configuration and maintained for the express purpose of removing ammonia-N.

Indicators of nitrification capability are:

(1) Biological monitoring for ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) to determine if the nitrification is occurring; and

(2) Analysis of the nitrogen balance to determine if nitrifying bacteria reduce the amount of ammonia and increase the amount of nitrite and nitrate.

(t) The term storm water from the immediate process area means storm water that comes into contact with process equipment located outdoors, storm water collected in process area and bulk storage tank secondary containment structures, and storm water from wastewater treatment systems located outdoors, provided that it has the potential to become contaminated with process wastewater pollutants for the particular subcategory. Storm water from building roofs, plant roadways, and other storm waters that do not have the potential to become contaminated with process wastewater pollutants are not storm water from the immediate process area.

(u) The term 2,3,7,8-TCDF means 2,3,7,8-tetrachlorodibenzofuran.

[47 FR 23284, May 27, 1982, as amended at 67 FR 64260, Oct. 17, 2002]

§420.03 Alternative effluent limitations representing the degree of effluent reduction attainable by the application of best practicable control technology currently available, best available technology economically achievable, best available demonstrated control technology, and best conventional pollutant control technology (the “water bubble”).

(a) Except as provided in paragraphs (c) through (f) of this section, any existing or new direct discharging point source subject to this part may qualify for alternative effluent limitations to those specified in subparts A through M of this part, representing the degree of effluent reduction attainable by the application of best practicable control technology currently available (BPT), best available technology economically achievable (BAT), best conventional pollutant control technology (BCT), and best available demonstrated control technology (NSPS). The alternative effluent limitations for each pollutant are determined for a combination of outfalls by totaling the mass limitations allowed under subparts A through M of this part for each pollutant.

(b) The water bubble may be used to calculate alternative effluent limitations only for identical pollutants (e.g., lead for lead, not lead for zinc).

(c) [Reserved]

(d) A discharger cannot qualify for alternative effluent limitations if the application of such alternative effluent limitations would cause or contribute to an exceedance of any applicable water quality standards.

(e) Each outfall from which process wastewaters are discharged must have specific, fixed effluent limitations for each pollutant limited by the applicable subparts A through M of this part.

(f) Subcategory-specific restrictions: (1) There shall be no alternate effluent limitations for cokemaking process wastewater unless the alternative limitations are more stringent than the limitations in subpart A of this part.(2) There shall be no alternate effluent limitations for 2,3,7,8-TCDF in sintering process wastewater.(3) There shall be no alternate effluent limitations for O&G in sintering process wastewater unless the alternative limitations are more stringent than the otherwise applicable limitations in subpart B of this part.§420.04§420.04 Calculation of pretreatment standards.40 CFR 420.04[49 FR 21029, May 17, 1984; 49 FR 24726, June 15, 1984; 49 FR 25634, June 22, 1984](a) Pretreatment standards shall be calculated for each operation using the applicable average rate of production reported by the owner or operator of the facility to the Control Authority in accordance with 40 CFR 403.12(b)(3).(b) The average rate of production reported by the owner or operator in accordance with 40 CFR 403.12(b)(3) shall be based not upon the design production capacity but rather upon a reasonable measure of actual production of the facility, such as the production during the high month of the previous year, or the monthly average for the highest of the previous 5 years. For new sources or new dischargers, actual production shall be estimated using projected production.(c) If, due to a change of circumstances, the average rate of production for an operation reported by the owner or operator of the facility to the Control Authority in accordance with 40 CFR 403.12(b)(3) does not represent a reasonable measure of actual production of that operation, the owner or operator must submit to the Control Authority a modified average rate of production.§420.05§420.05 Pretreatment standards compliance date.40 CFR 420.05[48 FR 46943, Oct. 14, 1983]The final compliance date for the categorical pretreatment standards set forth in 40 CFR part 420 is July 10, 1985.§420.06§420.06 Removal credits for phenols (4AAP).40 CFR 420.06[49 FR 21029, May 17, 1984]Removal allowances pursuant to 40 CFR 403.7(a)(1) may be granted for phenols (4AAP) limited in 40 CFR part 420 when used as an indicator or surrogate pollutant.§420.07§420.07 Effluent limitations guidelines and standards for pH.40 CFR 420.07[67 FR 64261, Oct. 17, 2002](a) The pH level in process wastewaters subject to a subpart within this part shall be within the range of 6.0 to 9.0.(b) The pH level shall be monitored at the point of discharge to the receiving water or at the point at which the wastewater leaves the wastewater treatment facility operated to treat effluent subject to that subpart.§420.08§420.08 Non-process wastewater and storm water.40 CFR 420.08[67 FR 64261, Oct. 17, 2002]Permit and pretreatment control authorities may provide for increased loadings for non-process wastewaters defined at §420.02 and for storm water from the immediate process area in NPDES permits and pretreatment control mechanisms using best professional judgment, but only to the extent such non-process wastewaters result in an increased flow.

[67 FR 64261, Oct. 17, 2002, as amended at 70 FR 73623, Dec. 13, 2005]

§420.10 Applicability.

The provisions of this subpart are applicable to discharges and the introduction of pollutants into publicly owned treatment works resulting from by-product and other cokemaking operations.

[67 FR 64261, Oct. 17, 2002]

§420.11 Specialized definitions.

(a) For the cokemaking subcategory, the term product means the production of coke plus coke breeze.

(b) The term by-product cokemaking means operations in which coal is heated in the absence of air to produce metallurgical coke (furnace coke and foundry coke), and the recovery of by-products derived from the gases and liquids that are driven from the coal during cokemaking.

(c) The term cokemaking - non-recovery means cokemaking operations for production of metallurgical coke (furnace coke and foundry coke) without recovery of by-products. Does not include co-generation facilities located at non-recovery coke facilities.

(d) The term coke means a processed form of coal that serves as the basic fuel for the smelting of iron ore.

(1) The term foundry coke means coke produced for foundry operations.

(2) The term furnace coke means coke produced for blast furnace operations

(e) The term merchant coke plant means by-product cokemaking operations that provide more than fifty percent of the coke produced to operations, industries, or processes other than ironmaking blast furnaces associated with steel production.

(f) The term iron and steel coke plant means by-product cokemaking operations other than those at merchant coke plants.

(g) The term coke oven gas wet desulfurization system means those systems that remove sulfur and sulfur compounds from coke oven gas and generate process wastewater.

(h) The term coke breeze means fine coke particles.

(i) The term indirect ammonia recovery system means those systems that recover ammonium hydroxide as a by-product from coke oven gases and waste ammonia liquors.

(j) The term iron and steel means those by-product cokemaking operations other than merchant cokemaking operations.

(k) The term merchant means those by-product cokemaking operations that provide more than fifty percent of the coke produced to operations, industries, or processes other than ironmaking blast furnaces associated with steel production.

(l) The term O&G (as HEM) means total recoverable oil and grease measured as n-hexane extractable material.

(m) The term wet desulfurization system means those systems that remove sulfur compounds from coke oven gases and produce a contaminated process wastewater.

[67 FR 64261, Oct. 17, 2002]

§420.12 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

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.

(a) By-product cokemaking - iron and steel.

(1) Increased loadings, not to exceed 11 percent of the above limitations, are allowed for by-product coke plants which have wet desulfurization systems but only to the extent such systems generate an increased effluent volume.

(2) Increased loadings, not to exceed 27 percent of the above limitations, are allowed for by-product coke plants which include indirect ammonia recovery systems but only to the extent that such systems generate an increased effluent volume.

(b) By-product cokemaking - merchant.

(1) Increased loadings, not to exceed 10 percent of the above limitations, are allowed for by-product coke plants which have wet desulfurization systems but only to the extent such systems generate an increased effluent volume.

(2) Increased loadings, not to exceed 25 percent of the above limitations, are allowed for by-product coke plants which include indirect ammonia recovery systems but only to the extent that such systems generate an increased effluent volume.

(c) Cokemaking - non-recovery. Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this segment must 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 wastewater pollutants to waters of the U.S.

[47 FR 23284, May 27, 1982, as amended at 67 FR 64262, Oct. 17, 2002]

§420.13 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

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 available technology economically achievable (BAT):

(a) By-product cokemaking.

(1) Increased loadings, not to exceed 13.3 per cent of the above limitations, shall be provided for process wastewaters from coke oven gas wet desulfurization systems, but only to the extent such systems generate process wastewaters.

(2) Increased loadings shall be provided for process wastewaters from other wet air pollution control systems (except those from coal charging and coke pushing emission controls), coal tar processing operations and coke plant groundwater remediation systems, but only to the extent such systems generate process wastewaters and those wastewaters are co-treated with process wastewaters from by-product cokemaking wastewaters.

(3) Increased loadings, not to exceed 44.2 percent of the above limitations, shall be provided for water used for the optimization of coke plant biological treatment systems.

(b) Cokemaking - non-recovery. There shall be no discharge of process wastewater pollutants to waters of the U.S.

[67 FR 64262, Oct. 17, 2002]

§420.14 New source performance standards (NSPS).

New sources subject to this subpart must achieve the following new source performance standards (NSPS), as applicable.

(a) By-product cokemaking. (1) Any new source subject to the provisions of this section that commenced discharging after November 18, 1992, and before November 18, 2002, must continue to achieve the standards specified in §420.14 of title 40 of the Code of Federal Regulations, revised as of July 1, 2001, except as provided below. For toxic and nonconventional pollutants, those standards shall apply until the expiration of the applicable time period specified in 40 CFR 122.29(d)(1); thereafter, the source must achieve the effluent limitations specified in §420.13(a).

(2) The following standards apply with respect to each new source that commences construction after November 18, 2002:

(A) Increased loadings, not to exceed 13.3 per cent of the above limitations, shall be provided for process wastewaters from coke oven gas wet desulfurization systems, but only to the extent such systems generate process wastewaters.

(B) Increased loadings shall be provided for process wastewaters from other wet air pollution control systems (except those from coal charging and coke pushing emission controls), coal tar processing operations and coke plant groundwater remediation systems, but only to the extent such systems generate process wastewaters and those wastewaters are co-treated with process wastewaters from by-product cokemaking wastewaters.

(C) Increased loadings, not to exceed 44.2 percent of the above limitations, shall be provided for water used for the optimization of coke plant biological treatment systems.

(b) Cokemaking - non-recovery. There shall be no discharge of process wastewater pollutants to waters of the U.S.

[67 FR 64262, Oct. 17, 2002, as amended at 70 FR 73623, Dec. 13, 2005]

§420.15 Pretreatment standards for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart that introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and must achieve the following pretreatment standards for existing sources (PSES):

(a) By-product cokemaking.

(1) Increased loadings, not to exceed 13.3 per cent of the above limitations, shall be provided for process wastewaters from wet coke oven gas desulfurization systems, but only to the extent such systems generate process wastewaters.

(2) Increased loadings shall be provided for process wastewaters from other wet air pollution control systems (except those from coal charging and coke pushing emission controls), coal tar processing operations and coke plant groundwater remediation systems, but only to the extent such systems generate process wastewaters and those wastewaters are co-treated with process wastewaters from by-product cokemaking wastewaters.

(3) Increased loadings, not to exceed 44.2 percent of the above limitations, shall be provided for water used for the optimization of coke plant biological treatment systems.

(b) Cokemaking - non-recovery. There shall be no discharge of process wastewater pollutants to POTWs.

[67 FR 64263, Oct. 17, 2002]

§420.16 Pretreatment standards for new sources (PSNS).

Except as provided in 40 CFR 403.7, any new source subject to this subpart that introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and must achieve the following pretreatment standards for new sources (PSNS), as applicable.

(a) By-product cokemaking. (1) Any new source subject to the provisions of this section that commenced discharging after November 18, 1992 and before November 18, 2002 must continue to achieve the standards specified in §420.16 of title 40 of the Code of Federal Regulations, revised as of July 1, 2001, (except for the standards for phenols 4AAP) for ten years beginning on the date the source commenced discharge or during the period of depreciation or amortization of the facility, whichever comes first, after which the source must achieve the standards specified in §420.15(a).

(2) Except as provided in 40 CFR 403.7, the following standards apply with respect to each new source that commences construction after November 18, 2002:

(A) Increased loadings, not to exceed 13.3 percent of the above limitations, shall be provided for process wastewaters from coke oven gas wet desulfurization systems, but only to the extent such systems generate process wastewaters.

(B) Increased loadings shall be provided for process wastewaters from other wet air pollution control systems (except those from coal charging and coke pushing emission controls), coal tar processing operations and coke plant groundwater remediation systems, but only to the extent such systems generate process wastewaters and those wastewaters are co-treated with process wastewaters from by-product cokemaking wastewaters.

(C) Increased loadings, not to exceed 44.2 percent of the above limitations, shall be provided for water used for the optimization of coke plant biological treatment systems.

(b) Cokemaking - non-recovery. Except as provided in 40 CFR 403.7, the following standards apply with respect to each new source that commences construction after November 18, 2002: There shall be no discharge of process wastewater pollutants to POTWs.

[67 FR 64263, Oct. 17, 2002, as amended at 70 FR 73623, Dec. 13, 2005]

§420.17 Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional technology (BCT).

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 conventional technology.

(a) By-product cokemaking - iron and steel.

(1) Increased loadings, not to exceed 11 percent of the above limitations, are allowed for by-product coke plants which have wet desulfurization systems but only to the extent such systems generate an increased effluent volume.

(2) Increased loadings, not to exceed 27 percent of the above limitations, are allowed for by-product coke plants which include indirect ammonia recovery systems but only to the extent that such systems generate an increased effluent volume.

(b) By-product cokemaking - merchant.

(1) Increased loadings, not to exceed 10 percent of the above limitations, are allowed for by-product coke plants which have wet desulfurization systems but only to the extent such systems generate an increased effluent volume.

(2) Increased loadings, not to exceed 25 percent of the above limitations, are allowed for by-product coke plants which include indirect ammonia recovery systems but only to the extent that such systems generate an increased effluent volume.

(c) Cokemaking - non-recovery. Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this segment must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT): There shall be no discharge of process wastewater pollutants to waters of the U.S.

[47 FR 23284, May 27, 1982, as amended at 67 FR 64264, Oct. 17, 2002]

§420.18 Pretreatment standards compliance dates.

Compliance with the pretreatment standards for existing sources set forth in §420.15 of this subpart is required not later than October 17, 2005 whether or not the pretreatment authority issues or amends a pretreatment permit requiring such compliance. Until that date, the pretreatment standards for existing sources set forth in Subpart A of title 40 of the Code of Federal Regulations, revised as of July 1, 2001, shall continue to apply.

[67 FR 64264, Oct. 17, 2002]

§420.20 Applicability; description of the sintering subcategory.

The provisions of this subpart are applicable to discharges and to the introduction of pollutants into publicly owned treatment works resulting from sintering operations conducted by the heating of iron bearing wastes (mill scale and dust from blast furnaces and steelmaking furnaces) together with fine iron ore, limestone, and coke fines in an ignition furnace to produce an agglomerate for charging to the blast furnace.

§420.21 Specialized definitions.

As used in this subpart:

(a) For the sintering subcategory, the term product means sinter agglomerated from iron-bearing materials.

(b) The term dry air pollution control system means an emission control system that utilizes filters to remove iron-bearing particles (fines) from blast furnace or sintering off-gases.

(c) The term minimum level (ML) means the level at which the analytical system gives recognizable signals and an acceptable calibration point. For 2,3,7,8-tetrachlorodibenzofuran, the minimum level is 10 pg/L per EPA Method 1613B for water and wastewater samples.

(d) The term pg/L means picograms per liter (ppt = 1.0 × 10-12 gm/L).

(e) The term sintering means a process for agglomerating iron-bearing materials into small pellets (sinter) that can be charged to a blast furnace.

(f) The term wet air pollution control system means an emission control system that utilizes water to clean process or furnace off-gases.

[67 FR 64264, Oct. 17, 2002]

§420.22 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

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 (BPT).

(a) Sintering operations with wet air pollution control system. The following table presents BPT limitations for sintering operations with wet air pollution control systems:

(b) Sintering operations with dry air pollution control system. There shall be no discharge of process wastewater pollutants to waters of the U.S.

[67 FR 64264, Oct. 17, 2002]

§420.23 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

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 available control technology economically achievable (BAT).

(a) Sintering operations with wet air pollution control system. The following table presents BAT limitations for sintering operations with wet air pollution control systems:

(b) Sintering operations with dry air pollution control system. There shall be no discharge of process wastewater pollutants to waters of the U.S.

[67 FR 64264, Oct. 17, 2002]

§420.24 New source performance standards (NSPS).

New sources subject to this subpart must achieve the following new source performance standards (NSPS), as applicable.

(a) Any new source subject to the provisions of this section that commenced discharging after November 18, 1992 and before November 18, 2002 must continue to achieve the applicable standards specified in §420.24 of title 40 of the Code of Federal Regulations, revised as of July 1, 2001, except that after the expiration of the applicable time period specified in 40 CFR 122.29(d)(1), the source must also achieve the effluent limitations specified in §420.23 for 2,3,7,8-TCDF.

(b) The following standards apply with respect to each new source that commences construction after November 18, 2002.

(1) Sintering operations with wet air pollution control system. The following table presents NSPS for sintering operations with wet air pollution control systems:

(2) Sintering operations with dry air pollution control system. There shall be no discharge of process wastewater pollutants to waters of the U.S.

[67 FR 64265, Oct. 17, 2002, as amended at 70 FR 73623, Dec. 13, 2005]

§420.25 Pretreatment standards for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart that introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and must achieve the following pretreatment standards for existing sources (PSES):

(a) Sintering operations with wet air pollution control system. The following table presents PSES for sintering operations with wet air pollution control systems:

(b) Sintering operations with dry air pollution control system. There shall be no discharge of process wastewater pollutants to POTWs.

[67 FR 64265, Oct. 17, 2002]

§420.26 Pretreatment standards for new sources (PSNS).

Except as provided in 40 CFR 403.7, any new source subject to this subpart that introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and must achieve the following pretreatment standards for new sources (PSNS), as applicable.

(a) Sintering operations with wet air pollution control system.

(1) Any new source subject to the provisions of this section that commenced discharging after November 18, 1992 and before November 18, 2002 must continue to achieve the standards specified in §420.26 of title 40 of the Code of Federal Regulations, revised as of July 1, 2001, for ten years beginning on the date the source commenced discharge or during the period of depreciation or amortization of the facility, whichever comes first, after which the source must also achieve the pretreatment standard for 2,3,7,8-TCDF specified in §420.25.

(2) Except as provided in 40 CFR 403.7, the following standards apply with respect to each new source that commences construction after November 18, 2002: The following table presents PSNS for sintering operations with wet air pollution control systems:

(b) Sintering operations with dry air pollution control system. There shall be no discharge of process wastewater pollutants to POTWs.

[67 FR 64266, Oct. 17, 2002, as amended at 70 FR 73623, Dec. 13, 2005]

§420.27 [Reserved]

§420.28 Pretreatment standards compliance dates.

Compliance with the pretreatment standards for 2,3,7,8-TCDF for existing sources set forth in §420.25(a) is required not later than October 17, 2005 whether or not the pretreatment authority issues or amends a pretreatment permit requiring such compliance.

[67 FR 64266, Oct. 17, 2002]

§420.29 Point of compliance monitoring.

(a) Sintering direct dischargers. Pursuant to 40 CFR 122.44(i) and 122.45(h), a direct discharger must demonstrate compliance with the effluent limitations and standards for 2,3,7,8-TCDF at the point after treatment of sinter plant wastewater separately or in combination with blast furnace wastewater, but prior to mixing with process wastewaters from processes other than sintering and ironmaking, non-process wastewaters or non-contact cooling water, if such water(s) are in an amount greater than 5 percent by volume of the sintering process wastewaters.

(b) Sintering indirect dischargers. An indirect discharger must demonstrate compliance with the pretreatment standards for 2,3,7,8-TCDF by monitoring at the point after treatment of sinter plant wastewater separately or in combination with blast furnace wastewater, but prior to mixing with process wastewaters from processes other than sintering and ironmaking, non-process wastewaters and non-contact cooling water in an amount greater than 5 percent by volume of the sintering process wastewaters.

[67 FR 64266, Oct. 17, 2002]

§420.30 Applicability; description of the ironmaking subcategory.

The provisions of this subpart are applicable to discharges and to the introduction of pollutants into publicly owned treatment works resulting from ironmaking operations in which iron ore is reduced to molten iron in a blast furnace.

§420.31 Specialized definitions.

(a) For ironmaking blast furnaces, the term product means the amount of molten iron produced.

(b) The term molten iron means iron produced in a blast furnace as measured at the blast furnace, and may include relatively minor amounts of blast furnace slag that may be skimmed from the molten iron at the steelmaking shop or other location remote from the blast furnace.

(c) The term iron blast furnace means all blast furnaces except ferromanganese blast furnaces.

(d) The term existing indirect dischargers means only those two iron blast furnace operations with discharges to publicly owned treatment works prior to May 27, 1982.

[67 FR 64266, Oct. 17, 2002]

§420.32 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

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.

(a) Iron blast furnace.

(b) [Reserved]

[47 FR 23284, May 27, 1982; 47 FR 41739, Sept. 22, 1982, as amended at 67 FR 64266, Oct. 17, 2002]

§420.33 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

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 available technology economically achievable.

(a) Iron blast furnace.

(b) [Reserved]

[47 FR 23284, May 27, 1982; 47 FR 41739, Sept. 22, 1982, as amended at 49 FR 21030, May 17, 1984; 67 FR 64266, Oct. 17, 2002]

§420.34 New source performance standards (NSPS).

The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below.

(a) Iron blast furnace.

(b) [Reserved]

[47 FR 23284, May 27, 1982; 47 FR 41739, Sept. 22, 1982, as amended at 49 FR 21030, May 17, 1984; 67 FR 64266, Oct. 17, 2002]

§420.35 Pretreatment standards for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any existing 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 existing sources.

(a) Iron blast furnace.

(b) [Reserved]

(c) Existing indirect dischargers.

[47 FR 23284, May 27, 1982, as amended at 49 FR 21030, May 17, 1984; 67 FR 64266, Oct. 17, 2002]

§420.36 Pretreatment standards for new sources (PSNS).

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.

(a) Iron blast furnace.

(b) [Reserved]

[47 FR 23284, May 27, 1982, as amended at 49 FR 21030, May 17, 1984; 67 FR 64267, Oct. 17, 2002]

§420.37 [Reserved]

§420.40 Applicability; description of the steelmaking subcategory.

The provisions of this subpart are applicable to discharges and to the introduction of pollutants into publicly owned treatment works resulting from steelmaking operations conducted in basic oxygen and electric arc furnaces.

[67 FR 64267, Oct. 17, 2002]

§420.41 Specialized definitions.

(a) The term basic oxygen furnace steelmaking means the production of steel from molten iron, steel scrap, fluxes, and various combinations thereof, in refractory lined furnaces by adding oxygen.

(b) [Reserved]

(c) The term electric arc furnace steelmaking means the production of steel principally from steel scrap and fluxes in refractory lined furnaces by passing an electric current through the scrap or steel bath.

(d) The term wet means those steelmaking air cleaning systems that primarily use water for furnace gas cleaning.

(e) The term semi-wet means those steelmaking air cleaning systems that use water for the sole purpose of conditioning the temperature and humidity of furnace gases such that the gases may be cleaned in dry air pollution control systems.

(f) The term open combustion means those basic oxygen furnace steelmaking wet air cleaning systems which are designed to allow excess air to enter the air pollution control system for the purpose of combusting the carbon monoxide in furnace gases.

(g) The term suppressed combustion means those basic oxygen furnace steelmaking wet air cleaning systems which are designed to limit or suppress the combustion of carbon monoxide in furnace gases by restricting the amount of excess air entering the air pollution control system.

[47 FR 23284, May 27, 1982, as amended at 67 FR 64267, Oct. 17, 2002]

§420.42 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

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.

(a) Electric arc furnace steelmaking - semi-wet. No discharge of process wastewater pollutants to navigable waters.

(b) Basic oxygen furnace steelmaking - wet-suppressed combustion.

(c) Basic oxygen furnace steelmaking - wet open combustion; and electric arc furnace steelmaking - wet.

(d) Basic oxygen furnace steelmaking - semi-wet. (1) No discharge of process wastewater pollutants to navigable waters.

(2) If the permittee demonstrates to the satisfaction of the permitting authority that safety considerations prevent attainment of these limitations, the permitting authority may establish alternative limitations on a best professional judgment basis.

[47 FR 23284, May 27, 1982, as amended at 67 FR 64267, Oct. 17, 2002]

§420.43 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

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 available technology economically achievable.

(a) Electric arc furnace steelmaking - semi-wet. No discharge of process wastewater pollutants to navigable waters.

(b) Basic oxygen furnace steelmaking - wet-suppressed combustion.

(c) Basic oxygen furnace steelmaking - wet open combustion; and electric arc furnace steelmaking - wet.

(d) Basic oxygen furnace steelmaking - semi-wet. (1) No discharge of process wastewater pollutants to navigable waters.

(2) If the permittee demonstrates to the satisfaction of the permitting authority that safety considerations prevent attainment of these limitations, the permitting authority may establish alternative limitations on a best professional judgment basis.

[47 FR 23284, May 27, 1982, as amended at 67 FR 64267, Oct. 17, 2002]

§420.44 New source performance standards (NSPS).

The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below.

(a) Basic oxygen furnace steelmaking - semi-wet; and electric arc furnace steelmaking - semi-wet. No discharge of process wastewater pollutants to navigable waters.

(b) Basic oxygen furnace steelmaking - wet-suppressed combustion.

(c) Basic oxygen furnace steelmaking - wet open combustion; and electric arc furnace steelmaking - wet.

[47 FR 23284, May 27, 1982, as amended at 67 FR 64267, Oct. 17, 2002]

§420.45 Pretreatment standards for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any existing 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 existing sources.

(a) Electric arc furnace steelmaking - semi-wet. No discharge of process wastewater pollutants to navigable waters.

(b) Basic oxygen furnace steelmaking - wet-suppressed combustion.

(c) Basic oxygen furnace steelmaking - wet open combustion; and electric arc furnace steelmaking - wet.

(d) Basic oxygen furnace steelmaking - semi-wet. (1) No discharge of process wastewater pollutants to navigable waters.

(2) If the permittee demonstrates to the satisfaction of the pretreatment control authority that safety considerations prevent attainment of these limitations, the pretreatment control authority may establish alternative limitations on a best professional judgment basis.

[47 FR 23284, May 27, 1982, as amended at 67 FR 64267, Oct. 17, 2002]

§420.46 Pretreatment standards for new sources (PSNS).

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.

(a) Basic oxygen furnace steelmaking - semi-wet; and electric arc furnace steelmaking - semi-wet. No discharge of process wastewater pollutants to navigable waters.

(b) Basic oxygen furnace steelmaking - wet-suppressed combustion.

(c) Basic oxygen furnace steelmaking - wet - open combustion; electric arc furnace steelmaking - wet.

[47 FR 23284, May 27, 1982, as amended at 47 FR 41739, Sept. 22, 1982; 67 FR 64268, Oct. 17, 2002]

§420.47 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT).

(a) Electric arc furnace steelmaking - semi-wet. No discharge of process wastewater pollutants to navigable waters.

(b) Basic oxygen furnace steelmaking - wet-suppressed combustion. [Reserved]

(c) Basic oxygen furnace steelmaking - wet - open combustion; electric arc furnace steelmaking - wet. [Reserved]

(d) Basic oxygen furnace steelmaking - semi-wet. (1) No discharge of process wastewater pollutants to navigable waters.

(2) If the permittee demonstrates to the satisfaction of the permitting authority that safety considerations prevent attainment of these limitations, the permitting authority may establish alternative limitations on a best professional judgment basis.

[47 FR 23284, May 27, 1982, as amended at 67 FR 64268, Oct. 17, 2002]

§420.48 Pretreatment standards compliance dates.

Compliance with the pretreatment standards for existing sources set forth in §420.45(d) of this subpart is required not later than October 17, 2005 whether or not the pretreatment authority issues or amends a pretreatment permit requiring such compliance.

[67 FR 64268, Oct. 17, 2002]

§420.50 Applicability; description of the vacuum degassing subcategory.

The provisions of this subpart are applicable to discharges and to the introduction of pollutants into publicly owned treatment works resulting from vacuum degassing operations conducted by applying a vacuum to molten steel.

§420.51 [Reserved]

§420.52 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

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.

§420.53 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

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 available technology economically achievable.

§420.54 New source performance standards (NSPS).

The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the values set forth below.

§420.55 Pretreatment standards for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any existing 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 existing sources.

§420.56 Pretreatment standards for new sources (PSNS).

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.

§420.57 [Reserved]

§420.60 Applicability; description of the continuous casting subcategory.

The provisions of this subpart are applicable to discharges and to the introduction of pollutants into publicly owned treatment works resulting from the continous casting of molten steel into intermediate or semi-finished steel products through water cooled molds.

§420.61 [Reserved]

§420.62 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

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.

§420.63 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

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 available technology economically achievable.

§420.64 New source performance standards (NSPS).

The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below.

§420.65 Pretreatment standards for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any existing 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 existing sources.

§420.66 Pretreatment standards for new sources (PSNS).

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.

§420.67 [Reserved]

§420.70 Applicability; description of the hot forming subcategory.

The provisions of this subpart are applicable to discharges and to the introduction of pollutants into publicly owned treatment works resulting from hot forming operations conducted in primary, section, flat, and pipe and tube mills.

§420.71 Specialized definitions.

(a) The term hot forming means those steel operations in which solidified, heated steel is shaped by rolls.

(b) The term primary mill means those steel hot forming operations that reduce ingots to blooms or slabs by passing the ingots between rotating steel rolls. The first hot forming operation performed on solidified steel after it is removed from the ingot molds is carried out on a “primary mill”.

(c) The term section mill means those steel hot forming operations that produce a variety of finished and semi-finished steel products other than the products of those mills specified below in paragraphs (d), (e), (g), and (h) of this section.

(d) The term flat mill means those steel hot forming operations that reduce heated slabs to plates, strip and sheet, or skelp.

(e) The term pipe and tube mill means those steel hot forming operations that produce butt welded or seamless tubular steel products.

(f) The term scarfing means those steel surface conditioning operations in which flames generated by the combustion of oxygen and fuel are used to remove surface metal imperfections from slabs, billets, or blooms.

(g) The term plate mill means those steel hot forming operations that produce flat hot-rolled products which are (1) between 8 and 48 inches wide and over 0.23 inches thick; or (2) greater than 48 inches wide and over 0.18 inches thick.

(h) The term hot strip and sheet mill means those steel hot forming operations that produce flat hot-rolled products other than plates.

(i) The term specialty steel means those steel products containing alloying elements which are added to enhance the properties of the steel product when individual alloying elements (e.g., aluminum, chromium, cobalt, columbium, molybdenum, nickel, titanium, tungsten, vanadium, zirconium) exceed 3% or the total of all alloying elements exceed 5%.

(j) The term carbon steel means those steel products other than specialty steel products.

(k) The term carbon hot forming operation (or “carbon”) means those hot forming operations which produce a majority, on a tonnage basis, of carbon steel products.

(l) The term specialty hot forming operation (or “specialty”) applies to all hot forming operations other than “carbon hot forming operations.”

§420.72 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

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.

(a) Primary mills, carbon and specialty - (1) Without scarfing.

(2) With scarfing.

(b) Section mills - (1) Carbon.

(2) Specialty.

(c) Flat mills - (1) Hot strip and sheet mills, carbon and specialty.

(2) Carbon plate mills.

(3) Specialty plate mills.

(d) Pipe and tube mills, carbon and specialty.

§420.73 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

The Agency has determined that there are not significant quantities of toxic pollutants in hot forming wastewaters after compliance with applicable BPT limitations. Accordingly, since the BPT level of treatment provides adequate control, the Agency is not promulgating more stringent BAT limitations.

§420.74 New source performance standards (NSPS).

The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below.

(a) Primary mills, carbon and specialty - (1) Without scarfing.

(2) With scarfing.

(b) Section mills - (1) Carbon.

(2) Specialty.

(c) Flat mills - (1) Hot strip and sheet mills, carbon and specialty.

(2) Carbon plate mills.

(3) Specialty plate mills.

(d) Pipe and tube mills, carbon and specialty.

§420.75 Pretreatment standards for existing sources (PSES).

Any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403.

§420.76 Pretreatment standards for new sources (PSNS).

Any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403.

§420.77 Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional technology (BCT).

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 conventional technology.

(a) Primary mills, carbon and specialty - (1) Without scarfing.

(2) With scarfing.

(b) Section mills - (1) Carbon.

(2) Specialty.

(c) Flat mills - (1) Hot strip and sheet mills, carbon and specialty.

(2) Carbon plate mills.

(3) Specialty plate mills.

(d) Pipe and tube mills, carbon and specialty.

[47 FR 23284, May 27, 1982, as amended at 47 FR 41739, Sept. 22, 1982]

§420.80 Applicability; description of the salt bath descaling subcategory.

The provisions of this subpart are applicable to discharges and to the introduction of pollutants into publicly owned treatment works resulting from oxidizing and reducing salt bath descaling operations.

§420.81 Specialized definitions.

(a) The term salt bath descaling, oxidizing means the removal of scale from semi-finished steel products by the action of molten salt baths other than those containing sodium hydride.

(b) The term salt bath descaling, reducing means the removal of scale from semi-finished steel products by the action of molten salt baths containing sodium hydride.

(c) The term batch, sheet and plate means those descaling operations that remove surface scale from sheet and plate products in batch processes.

(d) The term batch, rod and wire means those descaling operations that remove surface scale from rod and wire products in batch processes.

(e) The term batch, pipe and tube means those descaling operations that remove surface scale from pipe and tube products in batch processes.

(f) The term continuous means those descaling operations that remove surface scale from the sheet or wire products in continuous processes.

(g) The term batch means those descaling operations in which the products are processed in discrete batches.

§420.82 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

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.

(a) Salt bath descaling, oxidizing - (1) Batch, sheet and plate.

(2) Batch, rod and wire.

(3) Batch, pipe and tube.

(4) Continuous.

(b) Salt bath descaling, reducing - (1) Batch.

(2) Continuous.

[47 FR 23284, May 27, 1982; 47 FR 41739, Sept. 22, 1982]

§420.83 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

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 available technology economically achievable.

(a) Salt bath descaling, oxidizing - (1) Batch, sheet and plate.

(2) Batch, rod and wire.

(3) Batch, pipe and tube.

(4) Continuous.

(b) Salt bath descaling, reducing - (1) Batch.

(2) Continuous.

§420.84 New source performance standards (NSPS).

The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below.

(a) Salt bath descaling, oxidizing - (1) Batch, sheet and plate.

(2) Batch, rod and wire.

(3) Batch, pipe and tube.

(4) Continuous.

(b) Salt bath descaling, reducing - (1) Batch.

(2) Continuous.

§420.85 Pretreatment standards for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any existing 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 existing sources.

(a) Salt bath descaling, oxidizing - (1) Batch, sheet and plate.

(2) Batch, rod and wire.

(3) Batch, pipe and tube.

(4) Continuous.

(b) Salt bath descaling, reducing - (1) Batch.

(2) Continuous.

[47 FR 23284, May 27, 1982; 47 FR 41739, Sept. 22, 1982]

§420.86 Pretreatment standards for new sources (PSNS).

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.

(a) Salt bath descaling, oxidizing - (1) Batch, sheet and plate.

(2) Batch, rod and wire.

(3) Batch, pipe and tube.

(4) Continuous.

(b) Salt bath descaling, reducing - (1) Batch.

(2) Continuous.

[47 FR 23284, May 27, 1982, as amended at 47 FR 41739, Sept. 22, 1982]

§420.87 Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional technology (BCT).

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 conventional technology.

(a) Salt bath descaling, oxidizing - (1) Batch, sheet and plate.

(2) Batch, rod and wire.

(3) Batch, pipe and tube.

(4) Continuous.

(b) Salt bath descaling, reducing - (1) Batch.

(2) Continuous.

[47 FR 23284, May 27, 1982; 47 FR 41739, Sept. 22, 1982]

§420.90 Applicability; description of the acid pickling subcategory.

The provisions of this subpart are applicable to discharges and to the introduction of pollutants into publicly owned treatment works resulting from sulfuric acid, hydrochloric acid, or combination acid pickling operations.

§420.91 Specialized definitions.

(a) The term sulfuric acid pickling means those operations in which steel products are immersed in sulfuric acid solutions to chemically remove oxides and scale, and those rinsing operations associated with such immersions.

(b) The term hydrochloric acid pickling means those operations in which steel products are immersed in hydrochloric acid solutions to chemically remove oxides and scale, and those rinsing operations associated with such immersions.

(c) The term combination acid pickling means those operations in which steel products are immersed in solutions of more than one acid to chemically remove scale and oxides, and those rinsing steps associated with such immersions.

(d) The term fume scrubber means those pollution control devices used to remove and clean fumes originating in pickling operations.

(e) The term batch means those pickling operations which process steel products such as coiled wire, rods, and tubes in discrete batches or bundles.

(f) The term continuous means those pickling operations which process steel products other than in discrete batches or bundles.

(g) The term acid recovery means those sulfuric acid pickling operations that include processes for recovering the unreacted acid from spent pickling acid solutions.

(h) The term acid regeneration means those hydrochloric acid pickling operations that include processes for regenerating acid from spent pickling acid solutions.

(i) The term neutralization means those acid pickling operations that do not include acid recovery or acid regeneration processes.

(j) The term spent acid solution (or spent pickle liquor) means those solutions of steel pickling acids which have been used in the pickling process and are discharged or removed therefrom.

(k) The term rod, wire and coil means those acid pickling operations that pickle rod, wire or coiled rod and wire products.

(l) The term bar, billet and bloom means those acid pickling operations that pickle bar, billet or bloom products.

(m) The term strip, sheet and plate means those acid pickling operations that pickle strip, sheet or plate products.

(n) The term pipe, tube and other means those acid pickling operations that pickle pipes, tubes or any steel product other than those included in paragraphs (k), (l) and (m) of this section.

§420.92 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

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.

(a) Sulfuric acid pickling (spent acid solutions and rinse waters) - (1) Rod, wire and coil.

(2) Bar, billet and bloom.

(3) Strip, sheet and plate.

(4) Pipe, tube and other products.

(5) Fume scrubbers.

The above limitations shall be applicable to each fume scrubber associated with a sulfuric acid pickling operation.

(b) Hydrochloric acid pickling (spent acid solutions and rinse waters) - (1) Rod, wire and coil.

(2) Strip, sheet and plate.

(3) Pipe, tube and other products.

(4) Fume scrubbers.

The above limitations shall be applicable to each fume scrubber associated with a hydrochloric acid pickling operation.

(5) Acid regeneration (absorber vent scrubber).

The above limitations shall be applicable to the absorber vent scrubber wastewater associated with hydrochloric acid regeneration plants.

(c) Combination acid pickling (spent acid solution and rinse waters) - (1) Rod, Wire, and Coil.

(2) Bar, billet, and bloom.

(3) Strip, sheet, and plate - continuous.

(4) Strip, sheet and plate - batch.

(5) Pipe, tube, and other products.

(6) Fume scrubbers.

The above limitations shall be applicable to each fume scrubber associated with a combination acid pickling operation.

[47 FR 23284, May 27, 1982; 47 FR 41739, Sept. 22, 1982, as amended at 49 FR 21030, May 17, 1984]

§420.93 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

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 available technology economically achievable.

(a) Sulfuric acid pickling (spent acid solutions and rinse waters) - (1) Rod, wire and coil.

(2) Bar, billet and bloom.

(3) Strip, sheet and plate.

(4) Pipe, tube and other products.

(5) Fume scrubbers.

The above limitations shall be applicable to each fume scrubber associated with a sulfuric acid pickling operation.

(b) Hydrochloric acid pickling (spent acid solutions and rinse waters) - (1) Rod, wire and coil.

(2) Strip, sheet and plate.

(3) Pipe, tube and other products.

(4) Fume scrubbers.

The above limitations shall be applicable to each fume scrubber associated with a hydrochloric acid pickling operation.

(5) Acid regeneration (absorber vent scrubber).

The above limitations shall be applicable to the absorber vent scrubber wastewater associated with hydrochloric acid regeneration plants.

(c) Combination acid pickling (spent acid solution and rinse waters) - (1) Rod, wire, and coil.

(2) Bar, billet, and bloom.

(3) Strip, sheet, and plate - continuous.

(4) Strip, sheet, and plate - batch.

(5) Pipe, tube, and other products.

(6) Fume scrubbers.

The above limitations shall be applicable to each fume scrubber associated with a combination acid pickling operation.

[47 FR 23284, May 27, 1982; 47 FR 41739, Sept. 22, 1982, as amended at 49 FR 21031, May 17, 1984; 49 FR 24726, June 15, 1984]

§420.94 New source performance standards (NSPS).

The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below.

(a) Sulfuric acid pickling (spent acid solutions and rinse waters) - (1) Rod, wire, and coil.

(2) Bar, billet, and bloom.

(3) Strip, sheet, and plate.

(4) Pipe, tube and other products.

(5) Fume scrubbers.

The above limitations shall be applicable to each fume scrubber associated with a sulfuric acid pickling operation.

(b) Hydrochloric acid pickling (spent acid solutions and rinse waters) - (1) Rod, wire, and coil.

(2) Strip, sheet, and plate.

(3) Pipe, tube, and other products.

(4) Fume scrubbers.

The above limitations shall be applicable to each fume scrubber associated with a hydrochloric acid pickling operation.

(c) Combination acid pickling (spent acid solutions and rinse waters) - (1) Rod, wire, and coil.

(2) Bar, billet, and bloom.

(3) Strip, sheet and plate - continuous.

(4) Strip, sheet, and plate - batch.

(5) Pipe, tube, and other products.

(6) Fume scrubbers.

The above limitations shall be applicable to each fume scrubber associated with a combination acid pickling operation.

[47 FR 23284, May 27, 1982, as amended at 49 FR 21032, May 17, 1984]

§420.95 Pretreatment standards for existing sources (PSES).

Except as provided in 40 CFR 403.7 and 403.13, any existing 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 existing sources.

(a) Sulfuric acid (spent acid solutions and rinse waters) - (1) Rod, wire, and coil.

(2) Bar, billet, and bloom.

(3) Strip, sheet, and plate.

(4) Pipe, tube, and other products.

(5) Fume scrubber.

(b) Hydrochloric acid pickling (spent acid solutions and rinse waters) - (1) Rod, wire, and coil.

(2) Strip, sheet, and plate.

(3) Pipe, tube, and other products.

(4) Fume scrubber.

(5) Acid regeneration (absorber vent scrubber).

(c) Combination acid pickling (spent acid solutions and rinse waters) - (1) Rod, wire, and coil.

(2) Bar, billet, and bloom.

(3) Strip, sheet, and plate - continuous.

(4) Strip, sheet, and plate - batch.

(5) Pipe, tube, and other products.

(6) Fume scrubber.

[47 FR 23284, May 27, 1982; 47 FR 41739, Sept. 22, 1982, as amended at 49 FR 21033, May 17, 1984]

§420.96 Pretreatment standards for new sources (PSNS).

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.

(a) Sulfuric acid pickling (spent acid solutions and rinse waters) - (1) Rod, wire, coil.

(2) Bar, billet, and bloom.

(3) Strip, sheet, and plate.

(4) Pipe, tube, other products.

(5) Fume scrubber.

(b) Hydrochloric acid pickling (spent acid solutions and rinse waters) - (1) Rod, wire, coil.

(2) Strip, sheet, and plate.

(3) Pipe, tube, and other products.

(4) Fume scrubber.

(c) Combination acid pickling (spent acid solutions and rinse waters) - (1) Rod, wire, and coil.

(2) Bar, billet, and bloom.

(3) Strip, sheet, and plate - continuous.

(4) Strip, sheet, and plate - batch.

(5) Pipe, tube, and other products.

(6) Fume scrubber.

[47 FR 23284, May 27, 1982, as amended at 47 FR 41739, Sept. 22, 1982; 49 FR 21033, May 17, 1984]

§420.97 Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional technology (BCT).

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 conventional technology.

(a) Sulfuric acid pickling (spent acid solutions and rinse waters) - (1) Rod, wire and coil.

(2) Bar, billet and bloom.

(3) Strip, sheet and plate.

(4) Pipe, tube and other products.

(5) Fume scrubbers.

The above limitations shall be applicable to each fume scrubber associated with a sulfuric acid pickling operation.

(b) Hydrochloric acid pickling (spent acid solutions and rinse waters) - (1) Rod, wire and coil.

(2) Strip, sheet and plate.

(3) Pipe, tube and other products.

(4) Fume scrubbers.

The above limitations shall be applicable to each fume scrubber associated with a hydrochloric acid pickling operation.

(5) Acid regeneration (absorber vent scrubber).

The above limitations shall be applicable to the absorber vent scrubber wastewater associated with hydrochloric acid regeneration plants.

(c) Combination acid pickling (spent acid solution and rinse waters) - (1) Rod, wire, and coil.

(2) Bar, billet, and bloom.

(3) Strip, sheet, and plate - continuous.

(4) Strip, sheet and plate - batch.

(5) Pipe, tube, and other products.

(6) Fume scrubbers.

The above limitations shall be applicable to each fume scrubber associated with a combination acid pickling operation.

[47 FR 23284, May 27, 1982; 47 FR 41739, Sept. 22, 1982]

§420.100 Applicability; description of the cold forming subcategory.

(a) The provisions of this subpart are applicable to discharges and to the introduction of pollutants into publicly owned treatment works from cold rolling and cold working pipe and tube operations in which unheated steel is passed through rolls or otherwise processed to reduce its thickness, to produce a smooth surface, or to develop controlled mechanical properties in the steel.

(b) The limitations and standards set out below for cold worked pipe and tube operations shall be applicable only where cold worked pipe and tube wastewaters are discharged at steel plant sites. No limitations are applicable or allowable where these wastewaters are hauled off-site for disposal or are otherwise not discharged at steel plant sites. The limitations and standards set out below for cold worked pipe and tube operations shall be applicable only to the blowdown of soluble oil or water solutions used in cold worked pipe and tube forming operations. Limitations for other wastewater sources from these operations must be established on a site-specific basis.

[47 FR 23284, May 27, 1982, as amended at 49 FR 21034, May 17, 1984]

§420.101 Specialized definitions.

(a) The term recirculation means those cold rolling operations which include recirculation of rolling solutions at all mill stands.

(b) The term combination means those cold rolling operations which include recirculation of rolling solutions at one or more mill stands, and once-through use of rolling solutions at the remaining stand or stands.

(c) The term direct application means those cold rolling operations which include once-through use of rolling solutions at all mill stands.

(d) The term single stand means those recirculation or direct application cold rolling mills which include only one stand of work rolls.

(e) The term multiple stands means those recirculation or direct application cold rolling mills which include more than one stand of work rolls.

(f) The term cold worked pipe and tube means those cold forming operations that process unheated pipe and tube products using either water or oil solutions for cooling and lubrication.

§420.102 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

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.

(a) Cold rolling mills - (1) Recirculation - single stand.

(2) Recirculation - multiple stands.

(3) Combination.

(4) Direct application - single stand.

(5) Direct application - multiple stands.