40 CFR 405.72: 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 plants with a dairy products input of more than 85,000 lb/day of milk equivalent (more than 8,830 lb/day of BOD5 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 BOD5 input)

BOD5 2.20 0.880

TSS 3.30 1.320

pH (1) (1)

English units (pounds per 100 lb of BOD5 input)

BOD5 0.220 0.068

TSS 0.330 .132

pH (1) (1)

1 Within the range 6.0 to 9.0.

(b) For plants with a dairy products input of 85,000 lb/day or less of milk equivalent (less than 8.830 lb/day of BOD5 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 BOD5 input)

BOD5 2.926 1.463

TSS 4.388 2.194

pH (1) (1)

English units (pounds per 100 lb of BOD5 input)

BOD5 0.293 0.146

TSS 0.439 .219

pH (1) (1)

1 Within the range 6.0 to 9.0.