Section 410.63 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT)(a) Except as provided in 40 CFR 125.30 through 125.32 , any existing point source subject to this subpart must achieve the following efflluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT):| Pollutant or pollutant property | BAT limitations |
| Maximum for any 1 day | Average of daily values for 30 consecutive days |
| Kg/kkg (or pounds per 1,000 lb) of product |
| COD | 70.2 | 35.1 |
| Sulfide | 0.08 | 0.04 |
| Phenols | 0.04 | 0.02 |
| Total chromium | 0.04 | 0.02 |
(b) The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section and attributable to the manufacture of carpets through complex manufacturing operations, which may be discharged by a point source subject to the provisions of this subpart, in addition to the discharge allowed by paragraph (a) of this section.| Pollutant or pollutant property | BAT limitations |
| Maximum for any 1 day | Average of daily values for 30 consecutive days |
| Kg/kkg (or pounds per 1,000 lb) of product |
| COD | 20.0 | 10.0 |