Section NR 258.11 - Effluent limitations, best available treatmentThe following effluent limitations when applied in accordance with s. NR 258.06 establish the quantity or quality of pollutants or pollutant properties which may be discharged by a facility subject to the provisions of this chapter after application to process wastes of the best available technology economically achievable.
(1) The pH of all discharges shall be within the range of 6.0 to 9.0.(2) The fecal coliform of all discharges except those from the small processor subcategory shall not exceed an MPN of 400/100 ml.(3) The oil and grease content of discharges for the first 4 subcategories of table 2 shall not exceed 10 mg/l.(4) The ammonia content of all discharges except for the small processor and renderer subcategories shall not exceed 4 mg/l on a 30-day average basis nor a daily maximum of 8 mg/l. The effluent limitation for ammonia for discharges from the renderer subcategory shall be a 30 day average of 0.02 and a daily maximum of 0.04 lbs/1000 lbs. or kg/1000 kg. of raw material.(5) The BOD5, suspended solids, and oil and grease 30 day average limitations are set forth in table 2. The daily maximum limitations are 2 times the 30 day average values. The limitations of table 2 may be modified for the renderer subcategory in accordance with sub. (6).(6) For a renderer who conducts hide curing the effluent limitations for the renderer subcategory in table 2 shall be increased by adding; (a) To the limitation for BOD5 the value resulting from dividing the number of hides cured by their weight in pounds and multiplying by 7.9, or by their weight in kilograms and multiplying by 3.6 and(b) To the limitations for suspended solids the value resulting from dividing the number of hides cured by their weight in pounds and multiplying by 13.6, or by their weight in kilograms and multiplying by 6.2. Table 2
| | BAT Effluent Limitations |
Subcategory | BOD5 | Suspended Solids | Oil and Grease |
| | (in lbs/1000 lbs. or kg/1000 kg. LWK) |
Simple slaughterhouse | 0.03 | 0.05 | |
Complex slaughterhouse | 0.04 | 0.07 | |
Low-processing packinghouse | 0.04 | 0.06 | |
High-processing packinghouse | note (1) | note (2) | |
| | (in lbs/1000 lbs. or kg/1000 kg. of finished product) |
Small processor | 0.5 | 0.6 | 0.25 |
Meat cutter | 0.009 | 0.012 | 0.006 |
Sausage & luncheon meat processor | 0.14 | 0.19 | 0.10 |
Ham processor | 0.16 | 0.21 | 0.11 |
Canned meat processor | 0.17 | 0.22 | 0.13 |
| | (in lbs/1000 lbs. or kg/1000 kg of RM) |
Renderer | 0.07 | 0.10 | 0.05 |
Operations | | (in lbs/1000 lbs. or kg/1000 kg. ELWK) |
Blood processing | 0.007 | 0.013 | |
Rendering, wet or low temperature | 0.01 | 0.02 | |
Rendering, dry | 0.003 | 0.007 | |
Wis. Admin. Code Department of Natural Resources § NR 258.11
Cr. Register, June, 1976, No. 246, eff. 7-1-76.(1) The limitation is calculated using the formula 0.07X0.08(V-0.4) where V is the lb processed meat products/lb LWK.
(2) The limitation is calculated using the formula 0.09X0.10(V-0.4) where V is the same as note (1).