Regulations last checked for updates: May 19, 2024

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

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 practiacable technology currently available:

(a) Refinery sump filtrate.

BPT 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
Chromium32.27013.200
Copper139.30073.340
Nickel140.80093.140
Fluoride2,567.0001,459.000
Total suspended solids3,007.0001,430.000
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

(b) Slag leach reslurry.

BPT 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)2.0090.822
Copper8.6754.566
Nickel8.7675.799
Fluoride159.80090.860
Total suspended solids187.20089.040
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

(c) Solvent extraction raffinate filtrate.

BPT 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)2.8021.146
Copper12.1006.369
Nickel12.2308.089
Fluoride222.900126.700
Total suspended solids261.100124.200
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

(d) Digestion wet air pollution control.

BPT 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
Total suspended solids0.0000.000
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

(e) Evaporation and denitration wet air pollution control.

BPT 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
Total suspended solids0.0000.000
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

(f) Hydrofluorination alkaline scrubber.

BPT 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)0.0090.004
Copper0.0380.020
Nickel0.0380.025
Fluoride0.7000.398
Total suspended solids0.8200.390
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

(g) Hydrofluorination water scrubber.

BPT 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
Total suspended solids0.0000.000
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

(h) Magnesium reduction and casting floor wash.

BPT 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)0.0130.005
Copper0.0570.030
Nickel0.0580.038
Fluoride1.0540.599
Total suspended solids1.2340.587
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

(i) Laundry wastewater.

BPT 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)0.0840.035
Copper0.3650.192
Nickel0.3690.244
Fluoride6.7203.821
Total suspended solids7.8723.744
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

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 421.322