Section 415.62 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT)(a) Except as provided in 40 CFR 125.30 through 125.32 , any existing point source subject to this subpart and using the mercury cell process must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT): Subpart F-Chlor-Alkali Mercury Cells
| Pollutant or pollutant property | BPT limitations |
| Maximum for any 1 day | Average of daily values for 30 consecutive days |
| Kg/kkg (or pounds per 1,000 lb) of product |
| TSS | 0.64 | 0.32 |
| Mercury (T) | .00028 | .00014 |
| pH | (1) | (1) |
1 Within the range of 6.0 to 9.0.
(b) Except as provided in 40 CFR 125.30 through 125.32 , any existing point source subject to this subpart and using the diaphragm cell process must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT): Subpart F-Chlor-Alkali Diaphragm Cells
| Pollutant or pollutant property | BPT limitations |
| Maximum for any 1 day | Average of daily values for 30 consecutive days |
| Kg/kkg (or pounds per/1,000 lb) of product |
| TSS | 1.1 | 0.51 |
| Copper (T) | 0.018 | 0.0070 |
| Lead (T) | 0.026 | 0.010 |
| Nickel (T) | 0.014 | 0.0056 |
| pH | (1) | (1) |
1 Within the range 6.0 to 9.0.