40 CFR 421.265 - Pretreatment standards for existing sources.

View all text of Subpart X [§ 421.260 - § 421.267]

§ 421.265 - Pretreatment standards for existing sources.

Except as provided in 40 CFR 403.7 and 403.13, any existing 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 existing sources. The mass of wastewater pollutants in secondary precious metals process wastewater introduced into a POTW must not exceed the following values:

(a) Furnace wet air pollution control.

PSES 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.

PSES 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 (as N)	85.310	37.500

(c) Spent plating solutions.

PSES 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 material		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.

PSES 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

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.

PSES 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.

PSES 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.

PSES 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	0.003		Ammonia (as N)	1.160	0.510

(h) Gold precipitation and filtration.

PSES 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.

PSES 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.

PSES for the Secondary Precious Metals Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		mg/troy ounce of palladium 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.

PSES 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.

PSES 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.

PSES 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.

PSES for the Secondary Precious Metals Subcategory

Pollutant or pollutant property	Maximum for any 1 day	Maximum for monthly average		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 31710, 31711, Aug. 3, 1990]

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 (b), (c), (e), and (g), 1316 (b) and (c), 1317 (b) and (c), 1318 and 1361; 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 421.265