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. Subpart H 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 0.204 0.0876 Chromium 0.00292 0.00117 Nickel 0.00263 0.000876 pH ( 1 ) ( 1 ) 1 Within the range of 6.0 to 9.0. (2) Batch, rod and wire. Subpart H 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 0.123 0.0526 Chromium 0.00175 0.000701 Nickel 0.00158 0.000526 pH ( 1 ) ( 1 ) 1 Within the range of 6.0 to 9.0. (3) Batch, pipe and tube. Subpart H 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 0.496 0.213 Chromium 0.00709 0.00284 Nickel 0.00638 0.00213 pH ( 1 ) ( 1 ) 1 Within the range of 6.0 to 9.0. (4) Continuous. Subpart H 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 0.0964 0.0413 Chromium 0.00138 0.000551 Nickel 0.00124 0.000413 pH ( 1 ) ( 1 ) 1 Within the range of 6.0 to 9.0. (b) Salt bath descaling, reducing —(1) Batch. Subpart H 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 0.0949 0.0407 Cyanide 0.00102 0.000339 Chromium 0.00136 0.000542 Nickel 0.00122 0.000407 pH ( 1 ) ( 1 ) 1 Within the range of 6.0 to 9.0. (2) Continuous. Subpart H 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 0.532 0.228 Cyanide 0.00569 0.00190 Chromium 0.00759 0.00304 Nickel 0.00683 0.00228 pH ( 1 ) ( 1 ) 1 Within the range of 6.0 to 9.0. [47 FR 23284, May 27, 1982; 47 FR 41739, Sept. 22, 1982]