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

Except as provided in §§ 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT): (a) For whey drying plants with an input equivalent to more than 57,000 lb/day of 40 percent solids whey (22,800 lb/day of solids or 15,620 lb/day of BOD 5 input). Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kilograms per 1,000 kg of BOD 5 input) BOD 5 1.00 0.400 TSS 1.50 .600 pH ( 1 ) ( 1 ) English units (pounds per 100 lb of BOD 5 input) BOD 5 0.100 0.040 TSS 0.150 .060 pH ( 1 ) ( 1 ) 1 Within the range 6.0 to 9.0. (b) For whey drying plants with an input equivalent to 57,000 lb/day or less of 40 percent solids whey (under 22,800 lb/day solids or 15,620 lb/day of BOD 5 input). Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed— Metric units (kilograms per 1,000 kg of BOD 5 input) BOD 5 1.30 0.650 TSS 1.95 .975 pH ( 1 ) ( 1 ) English units (pounds per 100 lb of BOD 5 input) BOD 5 0.130 0.065 TSS 0.195 .098 pH ( 1 ) ( 1 ) 1 Within the range 6.0 to 9.0. [39 FR 18597, May 28, 1974, as amended at 60 FR 33935, June 29, 1995]