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 milk drying plants with an input equivalent to more than 145,000 lb/day of milk equivalent (more than 15,070 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 1.625 0.650 TSS 2.438 .975 pH ( 1 ) ( 1 ) English units (pounds per 100 lb of BOD 5 input) BOD 5 0.163 0.065 TSS 0.244 .098 pH ( 1 ) ( 1 ) 1 Within the range 6.0 to 9.0. (b) For milk drying plants with an input equivalent to 145,000 lb/day or less of milk equivalent (less than 15,070 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 2.176 1.088 TSS 3.276 1.638 pH ( 1 ) ( 1 ) English units (pounds per 100 lb of BOD 5 input) BOD 5 0.218 0.109 TSS 0.328 .164 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]