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. Subpart I Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kg/kkg (pounds per 1,000 lb) of product TSS 0.0818 0.0350 O&G 1 0.0350 0.0117 Lead 0.000526 0.000175 Zinc 0.000701 0.000234 pH ( 2 ) ( 2 ) 1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters. 2 Within the range of 6.0 to 9.0. (2) Bar, billet and bloom. Subpart I Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kg/kkg (pounds per 1,000 lb) of product TSS 0.0263 0.0113 O&G 1 0.0113 0.00375 Lead 0.000169 0.0000563 Zinc 0.000225 0.0000751 pH ( 2 ) ( 2 ) 1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters. 2 Within the range of 6.0 to 9.0. (3) Strip, sheet and plate. Subpart I Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kg/kkg (pounds per 1,000 lb) of product TSS 0.0526 0.0225 O&G 1 0.0225 0.00751 Lead 0.000338 0.000113 Zinc 0.000451 0.000150 pH ( 2 ) ( 2 ) 1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters. 2 Within the range of 6.0 to 9.0. (4) Pipe, tube and other products. Subpart I Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kg/kkg (pounds per 1,000 lb) of product TSS 0.146 0.0626 O&G 1 0.0626 0.0209 Lead 0.000939 0.000313 Zinc 0.00125 0.000417 pH ( 2 ) ( 2 ) 1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters. 2 Within the range of 6.0 to 9.0. (5) Fume scrubbers. Subpart I Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kilograms per day TSS 5.72 2.45 O&G 1 2.45 0.819 Lead 0.0368 0.0123 Zinc 0.0491 0.0164 pH ( 2 ) ( 2 ) 1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters. 2 Within the range of 6.0 to 9.0. 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. Subpart I Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kg/kkg (pounds per 1,000 lb) of product TSS 0.143 0.0613 O&G 1 0.0613 0.0204 Lead 0.000920 0.000307 Zinc 0.00123 0.000409 pH ( 2 ) ( 2 ) 1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters. 2 Within the range of 6.0 to 9.0. (2) Strip, sheet and plate. Subpart I Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kg/kkg (pounds per 1,000 lb) of product TSS 0.0818 0.0350 O&G 1 0.0350 0.0117 Lead 0.000526 0.000175 Zinc 0.000701 0.000234 pH ( 2 ) ( 2 ) 1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters. 2 Within the range of 6.0 to 9.0. (3) Pipe, tube and other products. Subpart I Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kg/kkg (pounds per 1,000 lb) of product TSS 0.298 0.128 O&G 1 0.128 0.0426 Lead 0.00192 0.000638 Zinc 0.00255 0.000851 pH ( 2 ) ( 2 ) 1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters. 2 Within the range of 6.0 to 9.0. (4) Fume scrubbers. Subpart I Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kilograms per day TSS 5.72 2.45 O&G 1 2.45 0.819 Lead 0.0368 0.0123 Zinc 0.0491 0.0164 pH ( 2 ) ( 2 ) 1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters. 2 Within the range of 6.0 to 9.0. The above limitations shall be applicable to each fume scrubber associated with a hydrochloric acid pickling operation. (5) Acid regeneration (absorber vent scrubber). Subpart I Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kilograms per day TSS 38.2 16.3 O&G 1 16.3 5.45 Lead 0.245 0.0819 Zinc 0.327 0.109 pH ( 2 ) ( 2 ) 1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters. 2 Within the range of 6.0 to 9.0. 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. Subpart I Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kg/kkg (pounds per 1,000 lb) of product TSS 0.149 0.0638 O&G 1 0.0638 0.0213 Chromium 0.00213 0.000852 Nickel 0.00192 0.000638 pH ( 2 ) ( 2 ) 1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters. 2 Within the range of 6.0 to 9.0. (2) Bar, billet, and bloom. Subpart I Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kg/kkg (pounds per 1,000 lb) of product TSS 0.0672 0.0288 O&G 1 0.0288 0.00960 Chromium 0.000960 0.000384 Nickel 0.000864 0.000288 pH ( 2 ) ( 2 ) 1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters. 2 Within the range of 6.0 to 9.0. (3) Strip, sheet, and plate—continuous. Subpart I Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kg/kkg (pounds per 1,000 lb) of product TSS 0.438 0.188 O&G 1 0.188 0.0626 Chromium 0.00626 0.00250 Nickel 0.00563 0.00188 pH ( 2 ) ( 2 ) 1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters. 2 Within the range of 6.0 to 9.0. (4) Strip, sheet and plate—batch. Subpart I Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kg/kkg (pounds per 1,000 lb) of product TSS 0.134 0.0576 O&G 1 0.0576 0.0192 Chromium 0.00192 0.000768 Nickel 0.00173 0.000576 pH ( 2 ) ( 2 ) 1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters. 2 Within the range of 6.0 to 9.0. (5) Pipe, tube, and other products. Subpart I Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kg/kkg (pounds per 1,000 lb) of product TSS 0.225 0.0964 O&G 1 0.0964 0.0322 Chromium 0.00322 0.00129 Nickel 0.00289 0.000964 pH ( 2 ) ( 2 ) 1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters. 2 Within the range of 6.0 to 9.0. (6) Fume scrubbers. Subpart I Pollutant or pollutant property BPT effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kilograms per day TSS 5.72 2.45 O&G 1 2.45 0.819 Chromium 0.0819 0.0327 Nickel 0.0735 0.0245 pH ( 2 ) ( 2 ) 1 The limitations for oil and grease shall be applicable when acid pickling wastewaters are treated with cold rolling wastewaters. 2 Within the range of 6.0 to 9.0. 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]