CCLME.ORG - 40 CFR PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY

(continued)

[50 FR 38365, Sept. 20, 1985, as amended at 55 FR 31706–31708, Aug. 3, 1990; 55 FR 36932, Sept. 7, 1990]

§ 421.264 Standards of performance for new sources.
top
Any new source subject to this subpart shall achieve the following new source performance standards:

(a) Furnace wet air pollution control.

NSPS for the Secondary Precious Metals Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
Total suspended solids........................ 67.500 54.000
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(b) Raw material granulation.

NSPS for the Secondary Precious Metals Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
Total suspended solids........................ 9.600 7.680
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(c) Spent plating solutions.

NSPS for the Secondary Precious Metals Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
Total suspended solids........................ 15.000 12.000
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(d) Spent cyanide stripping solutions.

NSPS for the Secondary Precious Metals Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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............................... 1.11 ...........
Ammonia (as N)................................ 493.200 216.800
Total suspended solids........................ 55.500 44.400
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(e) Refinery Wet Air Pollution Control 2

2 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.

NSPS for the Secondary Precious Metals Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
Total suspended solids........................ 15.000 12.000
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(f) Gold solvent extraction raffinate and wash water.

NSPS for the Secondary Precious Metals Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
Total suspended solids........................ 9.450 7.560
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(g) Gold spent electrolyte.

NSPS for the Secondary Precious Metals Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
gold
produced by
electrolysi
s
-------------------------
Copper........................................ 0.011 0.005
Cyanide (total)............................... 0.002 0.001
Combined metals............................... 0.003 ...........
Zinc.......................................... 0.009 0.004
Ammonia (as N)................................ 1.160 0.510
Total suspended solids........................ 0.131 0.104
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(h) Gold precipitation and filtration.

NSPS for the Secondary Precious Metals Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
gold
precipitate
d
-------------------------
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
Total suspended solids........................ 66.00 52.800
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(i) Platinum precipitation and filtration.

NSPS for the Secondary Precious Metals Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
platinum
precipitate
d
-------------------------
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
Total suspended solids........................ 78.000 62.400
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(j) Palladium precipitation and filtration.

NSPS for the Secondary Precious Metals Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
palladium
precipitate
d
-------------------------
Copper........................................ 7.680 3.660
Cyanide (total)............................... 1.200 0.480
Zinc.......................................... 6.1200 2.520
Combined metals............................... 1.800 ...........
Ammonia (as N)................................ 799.800 351.600
Total suspended solids........................ 90.000 72.000
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.00 at all times.

(k) Other platinum group metals precipitation and filtration.

NSPS for the Secondary Precious Metals Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
other
platinum
group
metals
precipitate
d
-------------------------
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
Total suspended solids........................ 78.000 62.400
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(l) Spent solution from PGC salt production.

NSPS for the Secondary Precious Metals Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
Total suspended solids........................ 13.500 10.800
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(m) Equipment and floor wash.

NSPS for the Secondary Precious Metals Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
Total suspended solids........................ 0.000 0.000
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(n) Preliminary Treatment.

NSPS for the Secondary Precious Metals Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
Total Suspended Solids........................ 750.000 600.000
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

[50 FR 38365, Sept. 20, 1985, as amended at 55 FR 31708–31710, Aug. 3, 1990]

§ 421.265 Pretreatment standards for existing sources.
top
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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
gold
produced by
electrolysi
s
-------------------------
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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
gold
precipitate
d
-------------------------
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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
platinum
precipitate
d
-------------------------
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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
palladium
precipitate
d
-------------------------
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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
other
platinum
group
metals
precipitate
d
-------------------------
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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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]

§ 421.266 Pretreatment standards for new sources.
top
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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day 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.

PSNS for the Secondary Precious Metals Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
precious
metals,including (continued)