40 C.F.R. § 430.34
Except as provided in 40 CFR 125.30 through 125.32 , any existing point source subject to this subpart where chlorophenolic-containing biocides are used must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT). Non-continuous dischargers shall not be subject to the maximum day mass limitations in kg/kkg (lb/1000 lb), but shall be subject to concentration limitations. Concentration limitations are only applicable to non-continuous dischargers. Permittees not using chlorophenolic-containing biocides must certify to the permit-issuing authority that they are not using these biocides:
Subpart C
[BAT effluent limitations for unbleached kraft facilities]
| Pollutant or pollutant property | Maximum for any 1 day | |
| Kg/kkg (or pounds per 1,000 lb) of product | Milligrams/liter | |
| Pentachlorophenol | 0.00058 | (0.011)(12.6)/y |
| Trichlorophenol | 0.00053 | (0.010)(12.6)/y |
| y = wastewater discharged in kgal per ton of product. | ||
Subpart C
[BAT effluent limitations for unbleached kraft facilities where pulp and paper are produced using the unbleached kraft-neutral sulfite semi-chemical (cross recovery) process and/or 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 | Maximum for any 1 day | |
| Kg/kkg (or pounds per 1,000 lb) of product | Milligrams/liter | |
| Pentachlorophenol | 0.00064 | (0.011)(14.0)/y |
| Trichlorophenol | 0.00059 | (0.010)(14.0)/y |
| y = wastewater discharged in kgal per ton of product. | ||
40 C.F.R. §430.34