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 0.169Mercury..................................... 0.195 0.078Silver...................................... 0.377 0.156Zinc........................................ 1.326 0.546Gold........................................ 0.130 ............Oil and Grease.............................. 13.000 13.000Total suspended solids...................... 19.500 15.600pH.......................................... (\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 0.052Mercury..................................... 0.060 0.024Silver...................................... 0.116 0.048Zinc........................................ 0.408 0.168Gold........................................ 0.040 ............Oil and Grease.............................. 4.000 4.000Total suspended solids...................... 6.000 4.800pH.......................................... (\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 electrolytically
---------------Lead........................................ 5.544 2.574Mercury..................................... 2.970 1.188Silver...................................... 5.742 2.376Zinc........................................ 20.200 8.316Gold........................................ 1.980 ............Oil and Grease.............................. 198.000 198.000Total suspended solids...................... 297.000 237.600pH.......................................... (\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 0.007Mercury..................................... 0.008 0.003Silver...................................... 0.015 0.006Zinc........................................ 0.051 0.021Gold........................................ 0.005 ............Oil and Grease.............................. 0.500 0.500Total suspended solids...................... 0.750 0.600pH.......................................... (\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 2.860Mercury..................................... 3.300 1.320Silver...................................... 6.380 2.640Zinc........................................ 22.440 9.240Gold........................................ 2.200 ............Oil and Grease.............................. 220.000 220.000Total suspended solids...................... 330.000 264.000pH.......................................... (\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 2.288Mercury..................................... 2.640 1.056Silver...................................... 5.104 2.112Zinc........................................ 17.950 7.392Gold........................................ 1.760 ............Oil and Grease.............................. 176.000 176.000Total suspended solids...................... 264.000 211.200pH.......................................... (\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 0.540Mercury..................................... 0.623 0.249Silver...................................... 1.204 0.498Zinc........................................ 4.233 1.743Gold........................................ 0.415 ............Oil and Grease.............................. 41.500 41.500Total suspended solids...................... 62.250 49.800pH.......................................... (\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 1.794Mercury..................................... 2.070 0.828Silver...................................... 4.002 1.656Zinc........................................ 14.080 5.796Gold........................................ 1.380 ............Oil and Grease.............................. 138.000 138.000Total suspended solids...................... 207.000 165.600pH.......................................... (\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 0.182Mercury..................................... 0.210 0.084Silver...................................... 0.406 0.168Zinc........................................ 1.428 0.588Gold........................................ 0.140 ............Oil and Grease.............................. 14.000 14.000Total suspended solids...................... 21.000 16.800pH.......................................... (\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] Sec. 421.255 [Reserved]