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

(continued)
Lead.......................................... 6.160 2.860
Mercury....................................... 3.300 1.320
Silver........................................ 6.380 2.640
Zinc.......................................... 22.440 9.240
Gold.......................................... 2.200 ...........
------------------------------------------------------------------------

(f) Calcine quench water.

PSNS for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
mercury
condensed
-------------------------
Lead.......................................... 4.928 2.288
Mercury....................................... 2.640 1.056
Silver........................................ 5.104 2.112
Zinc.......................................... 17.950 7.392
Gold.......................................... 1.760 ...........
------------------------------------------------------------------------

(g) Calciner stack gas contact cooling water.

PSNS for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
mercury
condensed
-------------------------
Lead.......................................... 1.162 0.540
Mercury....................................... 0.623 0.249
Silver........................................ 1.204 0.498
Zinc.......................................... 4.233 1,743
Gold.......................................... 0.415 ...........
------------------------------------------------------------------------

(h) Condenser blowdown.

PSNS for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
mercury
condensed
-------------------------
Lead.......................................... 3.864 1.794
Mercury....................................... 2.070 0.828
Silver........................................ 4.002 1.656
Zinc.......................................... 14.080 5.656
Gold.......................................... 1.380 ...........
------------------------------------------------------------------------

(i) Mercury cleaning bath water.

PSNS for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
mercury
condensed
-------------------------
Lead.......................................... 0.392 0.182
Mercury....................................... 0.210 0.084
Silver........................................ 0.406 0.168
Zinc.......................................... 1.428 0.588
Gold.......................................... 0.140 ...........
------------------------------------------------------------------------

§ 421.257 [Reserved]
top
Subpart X—Secondary Precious Metals Subcategory
top
Source: 50 FR 38365, Sept. 20, 1985, unless otherwise noted.

§ 421.260 Applicability: Description of the secondary precious metals subcategory.
top
The provisions of this subpart are applicable to discharges resulting from the production of precious metals at secondary precious metals facilities.

§ 421.261 Specialized definitions.
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For the purpose of this subpart:

(a) Except as provided below, the general definitions, abbreviations, and methods of analysis set forth in 40 CFR part 401 shall apply to this subpart.

(b) The term precious metals shall mean gold, platinum, palladium, rhodium, iridium, osmium, and ruthenium.

(c) The term Combined Metals, shall mean the total of gold, platinum and palladium.

[50 FR 38365, Sept. 20, 1985, as amended at 55 FR 31705, Aug. 3, 1990]

§ 421.262 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
top
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable technology currently available:

(a) Furnace wet air pollution control.

BPT Limitations 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........................................ 136.400 71.800
Cyanide (total)............................... 20.820 8.616
Zinc.......................................... 104.800 43.800
Ammonia (as N)................................ 9,571.000 4,207.000
Combined metals............................... 21.54 ...........
Total suspended solids........................ 2,944.000 1,400.000
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(b) Raw material granulation.

BPT Limitations for the Secondary Precious Metals Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
precious
metal in
the
granulated
raw
material
-------------------------
Copper........................................ 12.050 6.340
Cyanide (total)............................... 1.839 0.761
Zinc.......................................... 9.256 3.867
Ammonia (as N)................................ 845.100 371.500
Combined metals............................... 1.902 ...........
Total suspended solids........................ 259.900 123.600
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(c) Spent plating solutions.

BPT Limitations 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........................................ 1.900 1.000
Cyanide (total)............................... 0.290 0.120
Zinc.......................................... 1.460 0.610
Ammonia (as N)................................ 133.300 58.600
Combined metals............................... 0.300 ...........
Total suspended solids........................ 41.000 19.500
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(d) Spent cyanide stripping solutions.

BPT Limitations 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........................................ 7.030 3.700
Cyanide (total)............................... 1.073 0.444
Zinc.......................................... 5.402 2.257
Ammonia (as N)................................ 493.200 216.800
Combined metals............................... 1.110 ...........
Total suspended solids........................ 151.700 72.150
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.

BPT Limitations 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........................................ 39.900 21.000
Cyanide (total)............................... 6.090 2.520
Zinc.......................................... 30.660 12.810
Ammonia (as N)................................ 2,799.000 1,231.000
Combined metals............................... 6.300 ...........
Total suspended solids........................ 861.000 409.500
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at alltimes.

(f) Gold solvent extraction raffinate and wash water.

BPT Limitations 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........................................ 1.197 0.630
Cyanide (total)............................... 0.183 0.076
Zinc.......................................... 0.920 0.384
Ammonia (as N)................................ 83.980 36.920
Combined metals............................... 0.189 ...........
Total suspended solids........................ 25.830 12.290
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(g) Gold spent electrolyte.

BPT Limitations 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........................................ 0.017 0.009
Cyanide (total)............................... 0.003 0.001
Zinc.......................................... 0.103 0.005
Ammonia (as N)................................ 1.160 0.510
Combined metals............................... 0.003 ...........
Total suspended solids........................ 0.357 0.170
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(h) Gold precipitation and filtration.

BPT Limitations 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........................................ 8.360 4.400
Cyanide (total)............................... 1.276 0.528
Zinc.......................................... 6.424 2.684
Ammonia (as N)................................ 586.500 257.800
Combined metals............................... 1.320 ...........
Total suspended solids........................ 180.400 85.800
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(i) Platinum precipitation and filtration.

BPT Limitations 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........................................ 9.880 5.200
Cyanide (total)............................... 1.508 0.624
Zinc.......................................... 7.592 3.172
Ammonia (as N)................................ 693.200 304.700
Combined metals............................... 1.560 ...........
Total suspended solids........................ 213.200 101.400
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(j) Palladium precipitation and filtration.

BPT Limitations 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........................................ 11.400 6.000
Cyanide (total)............................... 1.740 0.720
Zinc.......................................... 8.760 3.660
Ammonia (as N)................................ 799.800 351.600
Combined metals............................... 1.800 ...........
Total suspended solids........................ 246.000 117.000
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(k) Other platinum group metals precipitation and filtration.

BPT Limitations 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........................................ 9.880 5.200
Cyanide (total)............................... 1.508 0.624
Zinc.......................................... 7.592 3.172
Ammonia (as N)................................ 693.200 304.700
Combined metals............................... 1.560 ...........
Total suspended solids........................ 213.200 101.400
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(l) Spent solution from PGC salt production.

BPT Limitations 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........................................ 1.710 0.900
Cyanide (total)............................... 0.261 0.108
Zinc.......................................... 1.314 0.549
Ammonia (as N)................................ 120.000 52.740
Combined metals............................... 0.270 ...........
Total suspended solids........................ 36.900 17.550
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(m) Equipment and floor wash.

BPT Limitations 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
Ammonia (as N)................................ 0.000 0.000
Combined metals............................... 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.

BPT Limitations 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........................................ 95.000 50.000
Cyanide (Total)............................... 14.500 6.000
Zinc.......................................... 73.000 30.500
Ammonia (as N)................................ 6665.000 2930.000
Combined Metals............................... 15.000 ...........
Total Suspended Solids........................ 2050.000 975.000
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 31705, 31706, Aug. 3, 1990]

§ 421.263 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
top
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable:

(a) Furnace wet air pollution control.

BAT Limitations 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.

BAT Limitations 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 ...........
Palladium..................................... 0.064 ...........
Platinum...................................... 0.064 ...........
Ammonia (as N)................................ 85.310 37.500
------------------------------------------------------------------------

(c) Spent plating solutions.

BAT Limitations 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
Gold..........................................
Combined metals............................... 0.300 ...........
Ammonia (as N)................................ 133.300 58.600
------------------------------------------------------------------------

(d) Spent cyanide stripping solutions.

BAT Limitations 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 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.

BAT Limitations 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.

BAT Limitations 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.

BAT Limitations 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........................................ 0.0111 0.0053
Cyanide (total)............................... 0.0017 0.0007
Zinc.......................................... 0.0089 0.0037
Combined metals............................... 0.0030 ...........
Ammonia (as N)................................ 1.1600 0.5100
------------------------------------------------------------------------

(h) Gold precipitation and filtration.

BAT Limitations 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.

BAT Limitations 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............................... 0.560 ...........
Ammonia (as N)................................ 693.200 304.700
------------------------------------------------------------------------

(j) Palladium precipitation and filtration.

BAT Limitations 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 .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.

BAT Limitations 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 solutions from PGC salt production.

BAT Limitations 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.

BAT Limitations 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.

BAT Limitations 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
------------------------------------------------------------------------ (continued)