Standards of performance for new sources.

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 Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/troy ounce of gold refined electrolytically 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 Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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]