Standards of performance for new sources.

Any new source subject to this subpart shall achieve the following new source performance standards: (a) Furnace wet air pollution control. NSPS for the Secondary Precious Metals Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 Total suspended solids 67.500 54.000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (b) Raw material granulation. NSPS for the Secondary Precious Metals Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 Ammonia (as N) 85.310 37.500 Total suspended solids 9.600 7.680 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (c) Spent plating solutions. NSPS for the Secondary Precious Metals Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 Combined metals 0.300 Ammonia (as N) 133.300 58.600 Total suspended solids 15.000 12.000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (d) Spent cyanide stripping solutions. NSPS for the Secondary Precious Metals Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 1.11 Ammonia (as N) 493.200 216.800 Total suspended solids 55.500 44.400 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. NSPS for the Secondary Precious Metals Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 Total suspended solids 15.000 12.000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (f) Gold solvent extraction raffinate and wash water. NSPS for the Secondary Precious Metals Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 Total suspended solids 9.450 7.560 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (g) Gold spent electrolyte. NSPS for the Secondary Precious Metals Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/troy ounce of gold produced by electrolysis Copper 0.011 0.005 Cyanide (total) 0.002 0.001 Combined metals 0.003 Zinc 0.009 0.004 Ammonia (as N) 1.160 0.510 Total suspended solids 0.131 0.104 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (h) Gold precipitation and filtration. NSPS for the Secondary Precious Metals Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/troy ounce of gold precipitated 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 Total suspended solids 66.00 52.800 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (i) Platinum precipitation and filtration. NSPS for the Secondary Precious Metals Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/troy ounce of platinum precipitated 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 Total suspended solids 78.000 62.400 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (j) Palladium precipitation and filtration. NSPS for the Secondary Precious Metals Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/troy ounce of palladium precipitated Copper 7.680 3.660 Cyanide (total) 1.200 0.480 Zinc 6.1200 2.520 Combined metals 1.800 Ammonia (as N) 799.800 351.600 Total suspended solids 90.000 72.000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.00 at all times. (k) Other platinum group metals precipitation and filtration. NSPS for the Secondary Precious Metals Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/troy ounce of other platinum group metals precipitated 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 Total suspended solids 78.000 62.400 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (l) Spent solution from PGC salt production. NSPS for the Secondary Precious Metals Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 Total suspended solids 13.500 10.800 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (m) Equipment and floor wash. NSPS for the Secondary Precious Metals Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 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. NSPS for the Secondary Precious Metals Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 Total Suspended Solids 750.000 600.000 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 31708, Aug. 3, 1990]