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

(a) Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart and using the mercury cell process 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): Subpart F—Chlor-Alkali Mercury Cells Pollutant or pollutant property BPT limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kg/kkg (or pounds per 1,000 lb) of product TSS 0.64 0.32 Mercury (T) .00028 .00014 pH ( 1 ) ( 1 ) 1 Within the range of 6.0 to 9.0. (b) Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart and using the diaphragm cell process 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): Subpart F—Chlor-Alkali Diaphragm Cells Pollutant or pollutant property BPT limitations Maximum for any 1 day Average of daily values for 30 consecutive days Kg/kkg (or pounds per/1,000 lb) of product TSS 1.1 0.51 Copper (T) 0.018 0.0070 Lead (T) 0.026 0.010 Nickel (T) 0.014 0.0056 pH ( 1 ) ( 1 ) 1 Within the range 6.0 to 9.0.