Regulations last checked for updates: May 19, 2024

Title 40 - Protection of Environment last revised: May 16, 2024
§ 421.323 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable:

(a) Refinery sump filtrate.

BAT Limitations for the Secondary Uranium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of uranium processed in the refinery
Chromium (total)27.1411.00
Copper93.8844.74
Nickel40.3427.14
Fluoride2,567.001,459.00

(b) Slag leach reslurry.

BAT Limitations for the Secondary Uranium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of uranium processed in the refinery
Chromium (total)1.6890.685
Copper5.8442.785
Nickel2.5111.689
Fluoride159.80090.860

(c) Solvent extraction raffinate filtrate.

BAT Limitations for the Secondary Uranium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of uranium processed in the refinery
Chromium (total)2.3570.955
Copper8.1523.885
Nickel3.5032.357
Fluoride222.900126.700

(d) Digestion wet air pollution control.

BAT Limitations for the Secondary Uranium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of uranium processed in the refinery
Chromium (total)0.0000.000
Copper0.0000.000
Nickel0.0000.000
Fluoride0.0000.000

(e) Evaporation and denitration wet air pollution control.

BAT Limitations for the Secondary Uranium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of uranium trioxide produced
Chromium (total)0.0000.000
Copper0.0000.000
Nickel0.0000.000
Fluoride0.0000.000

(f) Hydrofluorination alkaline scrubber.

BAT Limitations for the Secondary Uranium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of uranium tetrafluoride produced
Chromium (total)0.0070.003
Copper0.0260.012
Nickel0.0110.007
Fluoride0.7000.398

(g) Hydrofluorination water scrubber.

BAT Limitations for the Secondary Uranium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of uranium tetrafluoride produced
Chromium (total)0.0000.000
Copper0.0000.000
Nickel0.0000.000
Fluoride0.0000.000

(h) Magnesium reduction and casting floor wash.

BAT Limitations for the Secondary Uranium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of uranium produced by magnesium reduction
Chromium (total)0.0110.005
Copper0.0390.018
Nickel0.0170.011
Fluoride1.0540.599

(i) Laundry wastewater.

BAT Limitations for the Secondary Uranium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of uranium produced by magnesium reduction
Chromium (total)0.0360.014
Copper0.1230.059
Nickel0.0530.036
Fluoride3.3601.910
authority: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), 308 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) and the Water Quality Act of 1987 (the “Act”); 33 U.S.C. 1311,1314,c,e,and, 1316 (b) andc, 1317 (b) andc,1318; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 101 Stat. 7, Pub. L. 100-4
source: 49 FR 8790, Mar. 8, 1984, unless otherwise noted.
cite as: 40 CFR 421.323