40 C.F.R. § 421.124

Current through October 31, 2024
Section 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
Copper64.45030.720
Zinc51.36021.150
Ammonia (as N)6,712.0002,951.000
Total suspended solids755.300604.200
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
Copper1.242.592
Zinc.990.408
Ammonia (as N)129.30056.840
Total suspended solids14.55011.640
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
Copper73.69035.120
Zinc58.72024.180
Ammonia (as N)7,674.0003,374.000
Total suspended solids863.600690.900
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
Copper34.04816.226
Zinc27.13211.172
Ammonia (as N)3,545.0001,559.000
Total suspended solids399.000319.200
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
Copper15.5407.406
Zinc12.3805.099
Ammonia (as N)1,618.000711.400
Total suspended solids182.100145.700
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)101.30044.540
Total suspended solids11.4009.120
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)11.4705.040
Total suspended solids1.2901.032
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
Copper5.6712.703
Zinc4.5191.861
Ammonia (as N)590.500259.600
Total suspended solids66.45053.160
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
Copper3.9301.873
Zinc3.1321.290
Ammonia (as N)409.300179.900
Total suspended solids46.05036.840
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.

40 C.F.R. §421.124

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