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. Subpart J 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 0.00125 0.000626 O&G 0.000522 0.000209 Chromium 1 0.0000209 0.0000084 Lead 0.0000094 0.0000031 Nickel 1 0.0000188 0.0000063 Zinc 0.0000063 0.0000021 Naphthalene 0.0000021 Tetrachloroethylene 0.0000031 pH ( 2 ) ( 2 ) 1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling wastewaters. 2 Within the range of 6.0 to 9.0. (2) Recirculation—multiple stands. Subpart J 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 0.00626 0.00313 O&G 0.00261 0.00104 Chromium 1 0.000104 0.0000418 Lead 0.0000469 0.0000156 Nickel 1 0.0000939 0.0000313 Zinc 0.0000313 0.0000104 Naphthalene 0.0000104 Tetrachloroethylene 0.0000156 pH ( 2 ) ( 2 ) 1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling wastewaters. 2 Within the range of 6.0 to 9.0. (3) Combination. Subpart J 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 0.0751 0.0376 O&G 0.0313 0.0125 Chromium 1 0.00125 0.000501 Lead 0.000563 0.000188 Nickel 1 0.00113 0.000376 Zinc 0.000376 0.000125 Naphthalene 0.000125 Tetrachloroethylene 0.000188 pH ( 2 ) ( 2 ) 1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are cotreated with descaling or combination acid pickling wastewaters. 2 Within the range of 6.0 to 9.0. (4) Direct application—single stand. Subpart J 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 0.0225 0.0113 O&G 0.00939 0.00376 Chromium 1 0.000376 0.000150 Lead 0.000169 0.0000563 Nickel 1 0.000338 0.000113 Zinc 0.000113 0.0000376 Naphthalene 0.0000376 Tetrachloroethylene 0.0000563 pH ( 2 ) ( 2 ) 1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling wastewaters. 2 Within the range of 6.0 to 9.0. (5) Direct application—multiple stands. Subpart J 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 0.100 0.0501 O&G 0.0417 0.0167 Chromium 1 0.00167 0.000668 Lead 0.000751 0.000250 Nickel 1 0.00150 0.000501 Zinc 0.000501 0.000167 Naphthalene 0.000167 Tetrachloroethylene 0.000250 pH ( 2 ) ( 2 ) 1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling wastewaters. 2 Within the range of 6.0 to 9.0. (b) Cold worked pipe and tube —(1) Using water. Subpart J Pollutant of 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 0.00125 0.000626 O&G 0.000522 0.000209 Chromium 1 0.0000209 0.0000084 Lead 0.0000094 0.0000031 Nickel 1 0.0000188 0.0000063 Zinc 0.0000063 0.0000021 pH ( 2 ) ( 2 ) 1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold forming wastewaters are treated with descaling or combination acid pickling wastewaters. 2 Within the range of 6.0 to 9.0. (2) Using oil solutions. Subpart J 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 0.00125 0.000626 O&G 0.000522 0.000209 Chromium 1 0.0000209 0.0000084 Lead 0.0000094 0.0000031 Nickel 1 0.0000188 0.0000063 Zinc 0.0000063 0.0000021 Naphthalene 0.0000021 Tetrachloroethylene 0.0000031 pH ( 2 ) ( 2 ) 1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold forming wastewaters are treated with descaling or combination acid pickling wastewaters. 2 Within the range of 6.0 to 9.0. [47 FR 23284, May 27, 1982, as amended at 49 FR 21034, May 17, 1984; 49 FR 24726, June 15, 1984]