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 0.260Mercury....................................... 0.325 0.130Silver........................................ 0.533 0.221Zinc.......................................... 1.898 0.793Gold.......................................... 0.130 ...........Oil and grease................................ 26.000 15.600Total suspended solids........................ 53.300 25.350pH............................................ (\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 0.080Mercury....................................... 0.100 0.040Silver........................................ 0.164 0.068Zinc.......................................... 0.584 0.244Gold.......................................... 0.040 ...........Oil and grease................................ 8.000 4.800Total suspended solids........................ 16.400 7.800pH............................................ (\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 electrolytically
--------------Lead.......................................... 83.160 39.600Mercury....................................... 49.500 19.800Silver........................................ 81.180 33.660Zinc.......................................... 289.100 120.800Gold.......................................... 19.800 ...........Oil and grease................................ 3,960.000 2,376.000Total suspended solids........................ 8,118.000 3,861.000pH............................................ (\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 0.010Mercury..................................... 0.013 0.005Silver...................................... 0.021 0.009Zinc........................................ 0.073 0.031Gold........................................ 0.005 ............Oil and Grease.............................. 1.000 0.600Total suspended solids...................... 2.050 0.975pH.......................................... (\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 37.240Mercury..................................... 46.550 18.620Silver...................................... 76.340 31.650Zinc........................................ 271.900 113.600Gold........................................ 18.600 ............Oil and Grease.............................. 3,724.000 2,234.000Total suspended solids...................... 7,634.000 3,631.000pH.......................................... (\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 3.520Mercury..................................... 4.400 1.760Silver...................................... 7.216 2.992Zinc........................................ 25.700 10.740Gold........................................ 1.760 ............Oil and Grease.............................. 352.000 211.200Total suspended solids...................... 721.600 343.200pH.......................................... (\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 0.830Mercury..................................... 1.038 0.415Silver...................................... 1.702 0.706Zinc........................................ 6.059 2.532Gold........................................ 0.415 ............Oil and Grease.............................. 83.000 49.800Total suspended solids...................... 170.200 80.930pH.......................................... (\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 2.760Mercury..................................... 3.450 1.380Silver...................................... 5.658 2.346Zinc........................................ 20.150 8.418Gold........................................ 1.380 ............Oil and Grease.............................. 276.000 165.600Total suspended solids...................... 565.800 269.100pH.......................................... (\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 0.280Mercury..................................... 0.350 0.140Silver...................................... 0.574 0.238Zinc........................................ 2.044 0.854Gold........................................ 0.140 ............Oil and Grease.............................. 28.000 16.800Total suspended solids...................... 57.400 27.300pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.5 to 10.0 at all times.