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

(continued)
-------------------------
Chromium (total).............................. 2.198 0.899
Copper........................................ 9.491 4.995
Nickel........................................ 9.590 6.344
------------------------------------------------------------------------

(c) Acid reclaim leaching belt filter backwash.

PSNS for the Secondary Nickel Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/kg
(pounds per
million
pounds) of
acid
reclaim
nickel
produced
-------------------------
Chromium (total).............................. 0.528 0.216
Copper........................................ 2.278 1.199
Nickel........................................ 2.302 1.523
------------------------------------------------------------------------

§ 421.247 [Reserved]
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Subpart W—Primary Precious Metals and Mercury Subcategory
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Source: 50 FR 38361, Sept. 20, 1985, unless otherwise noted.

§ 421.250 Applicability: Description of the primary precious metals and mercury subcategory.
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The provisions of this subpart are applicable to discharges resulting from the production of gold, silver, or mercury by primary precious metals and mercury facilities.

§ 421.251 Specialized definitions.
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For the purpose of this subpart the general definitions, abbreviations, and methods of analysis set forth in 40 CFR part 401 shall apply to this subpart.

§ 421.252 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
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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) Smelter wet air pollution control.

BPT Limitations for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
gold and
silver
smelted
-------------------------
Lead.......................................... 0.546 0.260
Mercury....................................... 0.325 0.130
Silver........................................ 0.533 0.221
Zinc.......................................... 1.898 0.793
Gold.......................................... 0.130 ...........
Oil and grease................................ 26.000 15.600
Total suspended solids........................ 53.300 25.350
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(b) Silver chloride reduction spent solution.

BPT Limitations for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant of pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
silver
reduced in
solution
-------------------------
Lead.......................................... 0.168 0.080
Mercury....................................... 0.100 0.040
Silver........................................ 0.164 0.068
Zinc.......................................... 0.584 0.244
Gold.......................................... 0.040 ...........
Oil and grease................................ 8.000 4.800
Total suspended solids........................ 16.400 7.800
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(c) Electrolytic cells wet air pollution control.

BPT Limitations for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
gold
refined
electrolyti
cally
-------------------------
Lead.......................................... 83.160 39.600
Mercury....................................... 49.500 19.800
Silver........................................ 81.180 33.660
Zinc.......................................... 289.100 120.800
Gold.......................................... 19.800 ...........
Oil and grease................................ 3,960.000 2,376.000
Total suspended solids........................ 8,118.000 3,861.000
pH............................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(d) Electrolyte preparation wet air pollution control.

BPT Limitations for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
silver in
electrolyte
produced
---------------------------
Lead........................................ 0.021 0.010
Mercury..................................... 0.013 0.005
Silver...................................... 0.021 0.009
Zinc........................................ 0.073 0.031
Gold........................................ 0.005 ............
Oil and Grease.............................. 1.000 0.600
Total suspended solids...................... 2.050 0.975
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(e) Calciner wet air pollution control.

BPT Limitations 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........................................ 78.200 37.240
Mercury..................................... 46.550 18.620
Silver...................................... 76.340 31.650
Zinc........................................ 271.900 113.600
Gold........................................ 18.600 ............
Oil and Grease.............................. 3,724.000 2,234.000
Total suspended solids...................... 7,634.000 3,631.000
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(f) Calcine quench water.

BPT Limitations 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........................................ 7.392 3.520
Mercury..................................... 4.400 1.760
Silver...................................... 7.216 2.992
Zinc........................................ 25.700 10.740
Gold........................................ 1.760 ............
Oil and Grease.............................. 352.000 211.200
Total suspended solids...................... 721.600 343.200
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(g) Calciner stack gas contact cooling water.

BPT Limitations 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........................................ 1.743 0.830
Mercury..................................... 1.038 0.415
Silver...................................... 1.702 0.706
Zinc........................................ 6.059 2.532
Gold........................................ 0.415 ............
Oil and Grease.............................. 83.000 49.800
Total suspended solids...................... 170.200 80.930
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(h) Condenser blowdown.

BPT Limitations 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........................................ 5.796 2.760
Mercury..................................... 3.450 1.380
Silver...................................... 5.658 2.346
Zinc........................................ 20.150 8.418
Gold........................................ 1.380 ............
Oil and Grease.............................. 276.000 165.600
Total suspended solids...................... 565.800 269.100
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(i) Mercury cleaning bath water.

BPT Limitations 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........................................ 0.588 0.280
Mercury..................................... 0.350 0.140
Silver...................................... 0.574 0.238
Zinc........................................ 2.044 0.854
Gold........................................ 0.140 ............
Oil and Grease.............................. 28.000 16.800
Total suspended solids...................... 57.400 27.300
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

§ 421.253 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
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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) Smelter wet air pollution control.

BAT Limitations for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
gold and
silver
smelted
---------------------------
Lead........................................ 0.364 0.169
Mercury..................................... 0.195 0.078
Silver...................................... 0.377 0.156
Zinc........................................ 1.326 0.546
Gold........................................ 0.130 ............
------------------------------------------------------------------------

(b) Silver chloride reduction spent solution.

BAT Limitations for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
silver
reduced in
solution
---------------------------
Lead........................................ 0.112 0.052
Mercury..................................... 0.060 0.024
Silver...................................... 0.116 0.048
Zinc........................................ 0.408 0.168
Gold........................................ 0.040 ............
------------------------------------------------------------------------

(c) Electrolytic cells wet air pollution control.

BAT Limitations for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
gold refined
electrolytic
ally
---------------------------
Lead........................................ 5.544 2.574
Mercury..................................... 2.970 1.188
Silver...................................... 5.742 2.376
Zinc........................................ 20.200 8.316
Gold........................................ 1.980 ............
------------------------------------------------------------------------

(d) Electrolyte preparation wet air pollution control.

BAT Limitations for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
silver in
electrolyte
produced
---------------------------
Lead........................................ 0.014 0.007
Mercury..................................... 0.008 0.003
Silver...................................... 0.015 0.006
Zinc........................................ 0.051 0.021
Gold........................................ 0.005 ............
------------------------------------------------------------------------

(e) Calciner Wet Air Pollution Control.

BAT Limitations 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........................................ 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.

BAT Limitations 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.

BAT Limitations 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.

BAT Limitations 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 5.796
Gold........................................ 1.380 ............
------------------------------------------------------------------------

(i) Mercury cleaning bath water.

BAT Limitations 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 ............
------------------------------------------------------------------------

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

(a) Smelter wet air pollution control.

NSPS for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
gold and
silver
smelted
---------------------------
Lead........................................ 0.364 0.169
Mercury..................................... 0.195 0.078
Silver...................................... 0.377 0.156
Zinc........................................ 1.326 0.546
Gold........................................ 0.130 ............
Oil and Grease.............................. 13.000 13.000
Total suspended solids...................... 19.500 15.600
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(b) Silver chloride reduction spent solution.

NSPS for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
silver
reduced in
solution
---------------------------
Lead........................................ 0.112 0.052
Mercury..................................... 0.060 0.024
Silver...................................... 0.116 0.048
Zinc........................................ 0.408 0.168
Gold........................................ 0.040 ............
Oil and Grease.............................. 4.000 4.000
Total suspended solids...................... 6.000 4.800
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(c) Electrolytic cells wet air pollution control.

NSPS for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
gold refined
electrolytic
ally
---------------------------
Lead........................................ 5.544 2.574
Mercury..................................... 2.970 1.188
Silver...................................... 5.742 2.376
Zinc........................................ 20.200 8.316
Gold........................................ 1.980 ............
Oil and Grease.............................. 198.000 198.000
Total suspended solids...................... 297.000 237.600
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(d) Electrolyte preparation wet air pollution control.

NSPS for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
silver in
electrolyte
produced
---------------------------
Lead........................................ 0.014 0.007
Mercury..................................... 0.008 0.003
Silver...................................... 0.015 0.006
Zinc........................................ 0.051 0.021
Gold........................................ 0.005 ............
Oil and Grease.............................. 0.500 0.500
Total suspended solids...................... 0.750 0.600
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(e) Calciner wet air pollution control.

NSPS 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........................................ 6.160 2.860
Mercury..................................... 3.300 1.320
Silver...................................... 6.380 2.640
Zinc........................................ 22.440 9.240
Gold........................................ 2.200 ............
Oil and Grease.............................. 220.000 220.000
Total suspended solids...................... 330.000 264.000
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(f) Calcine quench water.

NSPS 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 ............
Oil and Grease.............................. 176.000 176.000
Total suspended solids...................... 264.000 211.200
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(g) Calciner stack gas contract cooling water.

NSPS 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) or
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 ............
Oil and Grease.............................. 41.500 41.500
Total suspended solids...................... 62.250 49.800
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(h) Condenser blowdown.

NSPS 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 5.796
Gold........................................ 1.380 ............
Oil and Grease.............................. 138.000 138.000
Total suspended solids...................... 207.000 165.600
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

(i) Mercury cleaning bath water.

NSPS 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 ............
Oil and Grease.............................. 14.000 14.000
Total suspended solids...................... 21.000 16.800
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.5 to 10.0 at all times.

[50 FR 38361, Sept. 20, 1985; 50 FR 41144, Oct. 9, 1985]

§ 421.255 [Reserved]
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§ 421.256 Pretreatment standards for new sources.
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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 primary precious metals and mercury process wastewater introduced into a POTW shall not exceed the following values:

(a) Smelter wet air pollution control.

PSNS for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
gold and
silver
smelted
---------------------------
Lead........................................ 0.364 0.169
Mercury..................................... 0.195 0.078
Silver...................................... 0.377 0.156
Zinc........................................ 1.326 0.546
Gold........................................ 0.130 ............
------------------------------------------------------------------------

(b) Silver chloride reduction spent solution.

PSNS for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
silver
reduced in
solution
---------------------------
Lead........................................ 0.112 0.052
Mercury..................................... 0.060 0.024
Silver...................................... 0.116 0.048
Zinc........................................ 0.408 0.168
Gold........................................ 0.040 ............
------------------------------------------------------------------------

(c) Electrolytic cells wet air pollution control.

PSNS for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
gold
refined
electrolyti
cally
-------------------------
Lead.......................................... 5.544 2.574
Mercury....................................... 2.970 1.188
Silver........................................ 5.742 2.376
Zinc.......................................... 20.200 8.316
Gold.......................................... 1.980 ...........
------------------------------------------------------------------------

(d) Electrolyte preparation wet air pollution control.

PSNS for the Primary Precious Metals and Mercury Subcategory
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
mg/troy
ounce of
silver in
electrolyte
produced
-------------------------
Lead.......................................... 0.014 0.007
Mercury....................................... 0.008 0.003
Silver........................................ 0.015 0.006
Zinc.......................................... 0.051 0.021
Gold.......................................... 0.005 ...........
------------------------------------------------------------------------

(e) Calciner wet air pollution control.

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
------------------------- (continued)