40 C.F.R. § 430.32
Except as provided in 40 CFR 125.30 through 125.32 , any existing point source subject to this subpart 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 C
[BPT effluent limitations for unbleached kraft facilities]
| Pollutant or pollutant property | Kg/kkg (or pounds per 1,000 lb) of product | |
| Maximum for any 1 day | Average of daily values for 30 consecutive days | |
| BOD5 | 5.6 | 2.8 |
| TSS | 12.0 | 6.0 |
| pH | (1) | (1) |
1 Within the range of 6.0 to 9.0 at all times.
Subpart C
[BPT effluent limitations for unbleached kraft facilities producing pulp and paper using the unbleached kraft-neutral sulfite semi-chemical (cross recovery) process]
| Pollutant or pollutant property | Kg/kkg (or pounds per 1,000 lb) of product | |
| Maximum for any 1 day | Average of daily values for 30 consecutive days | |
| BOD5 | 8.0 | 4.0 |
| TSS | 12.5 | 6.25 |
| pH | (1) | (1) |
1 Within the range of 6.0 to 9.0 at all times.
Subpart C
[BPT effluent limitations for unbleached kraft facilities where pulp and paper are produced using a combined unbleached kraft and semi-chemical process, wherein the spent semi-chemical cooking liquor is burned within the unbleached kraft chemical recovery system]
| Pollutant or pollutant property | Kg/kkg (or pounds per 1,000 lb) of product | |
| Maximum for any 1 day | Average of daily values for 30 consecutive days | |
| BOD5 | (a) | (a) |
| TSS | (a) | (a) |
| pH | (a) | (a) |
a [Reserved]
40 C.F.R. §430.32