40 CFR 421.123 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

§ 421.123 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) Subpart L—Film Stripping.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of silver from film stripping
Copper 64.450 30.720
Zinc 51.360 21.150
Ammonia (as N) 6,712.000 2,951.000
(b) Subpart L—Film Stripping Wet Air Pollution Control and Precipitation and Filtration of Film Stripping Solutions Wet Air Pollution Control.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of silver from precipitation and filtration of film stripping solutions
Copper 1.242 .592
Zinc .990 .408
Ammonia (as N) 129.300 56.840
(c) Subpart L—Precipitation and Filtration of Film Stripping Solutions.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of silver precipitated
Copper 73.690 35.120
Zinc 58.720 24.180
Ammonia (as N) 7,674.000 3,374.000
(d) Subpart L—Precipitation and Filtration of Photographic Solutions.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of silver precipitated
Copper 34.048 16.226
Zinc 27.132 11.172
Ammonia (as N) 3,545.000 1,559.000
(e) Subpart L—Precipitation and Filtration of Photographic Solutions Wet Air Pollution Control.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of silver from precipitation and filtration of photographic solutions
Copper 15.540 7.406
Zinc 12.380 5.099
Ammonia (as N) 1,618.000 711.400
(f) Subpart L—Electrolytic Refining.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of silver from electrolytic refining
Copper .973 .464
Zinc .775 .319
Ammonia (as N) 101.300 44.540
(g) Subpart L—Furnace Wet Air Pollution Control.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of silver roasted, smelted, or dried
Copper .000 .000
Zinc .000 .000
Ammonia (as N) .000 .000
(h) Subpart L—Leaching.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of silver produced from leaching
Copper .110 .053
Zinc .088 .036
Ammonia (as N) 11.470 5.040
(i) Subpart L—Leaching Wet Air Pollution Control and Precipitation of Nonphotographic Solutions Wet Air Pollution Control.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of silver produced from leaching or silver precipitated
Copper 5.671 2.703
Zinc 4.519 1.861
Ammonia (as N) 590.500 259.600
(j) Subpart L—Precipitation and Filtration of Nonphotographic Solutions.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of silver precipitated
Copper 3.930 1.873
Zinc 3.132 1.290
Ammonia (as N) 409.300 179.900
(k) Subpart L—Floor and Equipment Washdown.
BAT Effluent Limitations
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of silver production
Copper .000 .000
Zinc .000 .000
Ammonia (as N) .000 .000

Title 40 published on 2013-07-01

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