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): Subpart BB—Sodium Bisulfite Pollutant or pollutant property BPT effluent 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 0.32 0.080 COD 3.8 0.95 Chromium (T) 0.0020 0.00063 Zinc (T) 0.0051 0.0015 pH ( 1 ) ( 1 ) 1 Within the range 6.0 to 9.0.