40 CFR 421.266 - Pretreatment standards for new sources.

§ 421.266 Pretreatment standards for new sources.
Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources. The mass of wastewater pollutants in secondary precious metals process wastewater introduced into a POTW shall not exceed the following values:
(a) Furnace wet air pollution control.
PSNS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of precious metals, including silver, incinerated or smelted
Copper 5.760 2.745
Cyanide (total) 0.900 0.360
Zinc 4.590 1.890
Combined metals 1.350
Ammonia (as N) 599.900 263.700
(b) Raw material granulation.
PSNS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of precious metals, in the granulated raw material
Copper 0.819 0.390
Cyanide (total) 0.128 0.051
Zinc 0.653 0.269
Combined metals 0.192
Ammonia 85.310 37.500
(c) Spent plating solutions.
PSNS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/liter of spent plating solution used as a raw materail
Copper 1.280 0.610
Cyanide (total) 0.200 0.080
Zinc 1.020 0.420
Combined metals 0.300
Ammonia (as N) 133.300 58.600
(d) Spent cyanide stripping solutions.
PSNS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of gold produced by cyanide stripping
Copper 4.736 2.257
Cyanide (total) 0.740 0.296
Zinc 3.774 1.554
Combined metals 1.110
Ammonia (as N) 493.200 216.800
(e) Refinery Wet Air Pollution Control. 1

Footnote(s):
1 This allowance applies to either acid or alkaline wet air pollution control scrubbers. If both acid and alkaline wet air pollution control scrubbers are present in a particular facility the same allowance applies to each.

PSNS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of precious metals, including silver, produced in refinery
Copper 1.280 0.610
Cyanide (total) 0.200 0.080
Zinc 1.020 0.420
Combined metals 0.300
Ammonia (as N) 133.300 58.600
(f) Gold solvent extraction raffinate and wash water.
PSNS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of gold produced by solvent extraction
Copper 0.806 0.384
Cyanide (total) 0.126 0.050
Zinc 0.643 0.265
Combined metals 0.189
Ammonia (as N) 83.980 36.920
(g) Gold spent electrolyte.
PSNS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of gold produced by electrolysis
Copper 0.011 0.005
Cyanide (total) 0.002 0.001
Zinc 0.009 0.004
Combined metals 0.300
Ammonia (as N) 1.160 0.510
(h) Gold precipitation and filtration.
PSNS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of gold precipitated
Copper 5.632 2.684
Cyanide (total) 0.880 0.352
Zinc 4.488 1.848
Combined metals 1.320
Ammonia (as N) 586.500 257.800
(i) Platinum precipitation and filtration.
PSNS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of platinum precipitated
Copper 6.656 3.172
Cyanide (total) 1.040 0.416
Zinc 5.304 2.184
Combined metals 1.560
Ammonia (as N) 693.200 304.700
(j) Palladium precipitation and filtration.
PSNS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of platinum precipitated
Copper 7.680 3.660
Cyanide (Total) 1.200 0.480
Zinc 6.120 2.520
Combined Metals 1.800
Ammonia (as N) 799.800 351.600
(k) Other platinum group metals precipitation and filtration.
PSNS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of other platinum group metals precipitated
Copper 6.656 3.172
Cyanide (total) 1.040 0.416
Zinc 5.304 2.184
Combined metals 1.560
Ammonia (as N) 693.200 304.700
(l) Spent solution from PGC salt production.
PSNS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of gold contained in PGC product
Copper 1.152 0.549
Cyanide (total) 0.180 0.072
Zinc 0.918 0.378
Combined metals 0.270
Ammonia (as N) 120.000 52.740
(m) Equipment and floor wash.
PSNS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/troy ounce of precious metals, including silver, produced in refinery
Copper 0.000 0.000
Cyanide (total) 0.000 0.000
Zinc 0.000 0.000
Combined metals 0.000
Ammonia (as N) 0.000 0.000
(n) Preliminary Treatment.
PSNS for the Secondary Precious Metals Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly averge
mg/troy ounce of total precious metals produced through this operation
Copper 64.000 30.500
Cyanide (Total) 10.000 4.000
Zinc 51.000 21.000
Combined Metals 15.000
Ammonia (as N) 6665.000 2930.000
[50 FR 38365, Sept. 20, 1985, as amended at 55 FR 31711-31713, Aug. 3, 1990]

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