40 CFR 421.124 - Standards of performance for new sources.

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§ 421.124 Standards of performance for new sources.

Any new source subject to this subpart shall achieve the following new source performance standards:

(a) Subpart L - Film Stripping.

NSPS

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
Total suspended solids 755.300 604.200
pH ( 1) ( 1)

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

(b) Subpart L - Film Stripping Wet Air Pollution Control and Precipitation and Filtration of Film Stripping Solutions Wet Air Pollution Control.

NSPS

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
Total suspended solids 14.550 11.640
pH ( 1) ( 1)

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

(c) Subpart L - Precipitation and Filtration of Film Stripping Solutions.

NSPS

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
Total suspended solids 863.600 690.900
pH ( 1) ( 1)

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

(d) Subpart L - Precipitation and Filtration of Photographic Solutions.

NSPS

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
Total suspended solids 399.000 319.200
pH ( 1) ( 1)

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

(e) Subpart L - Precipitation and Filtration of Photographic Solutions Wet Air Pollution Control.

NSPS

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
Total suspended solids 182.100 145.700
pH ( 1) ( 1)

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

(f) Subpart L - Electrolytic Refining.

NSPS

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
Total suspended solids 11.400 9.120
pH ( 1) ( 1)

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

(g) Subpart L - Furnace Wet Air Pollution Control.

NSPS

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
Total suspended solids .000 .000
pH ( 1) ( 1)

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

(h) Subpart L - Leaching.

NSPS

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
Total suspended solids 1.290 1.032
pH ( 1) ( 1)

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

(i) Subpart L - Leaching Wet Air Pollution Control and Precipitation of Nonphotographic Solutions Wet Air Pollution Control.

NSPS

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
Total suspended solids 66.450 53.160
pH ( 1) ( 1)

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

(j) Subpart L - Precipitation and Filtration of Nonphotograhic Solutions.

NSPS

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
Total suspended solids 46.050 36.840
pH ( 1) ( 1)

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

(k) Subpart L - Floor and Equipment Washdown.

NSPS

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
Total suspended solids .000 .000
pH ( 1) ( 1)

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

[49 FR 8821, Mar. 8, 1984, as amended at 49 FR 29795, July 24, 1984]

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