Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

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) Tantalum alloy leach and rinse. BPT Limitations for the Secondary Tantalum Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tantalum powder produced Copper 438.100 230.600 Lead 96.850 46.120 Nickel 442.800 292.900 Zinc 336.700 140.700 Tantalum 103.800 Total suspended solids 9,455.000 4,497.000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (b) Capacitor leach and rinse. BPT Limitations for the Secondary Tantalum Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tantalum powder produced from leaching Copper 38.380 20.200 Lead 8.484 4.040 Nickel 38.780 25.650 Zinc 29.490 12.320 Tantalum 9.090 Total suspended solids 828.200 393.900 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (c) Tantalum sludge leach and rinse. BPT Limitations for the Secondary Tantalum Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of equivalent pure tantalum powder produced Copper 390.100 205.300 Lead 86.230 41.060 Nickel 394.200 260.700 Zinc 299.700 125.200 Tantalum 92.390 Total suspended solids 8,417.000 4,003.000 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (d) Tantalum powder acid wash and rinse. BPT Limitations for the Secondary Tantalum Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tantalum powder produced Copper 0.665 0.350 Lead 0.147 0.070 Nickel 0.672 0.445 Zinc 0.511 0.214 Tantalum 0.158 Total suspended solids 14.350 6.825 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (e) Leaching wet air pollution control. BPT Limitations for the Secondary Tantalum Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of equivalent pure tantalum powder produced Copper 9.272 4.880 Lead 2.050 0.976 Nickel 9.370 6.198 Zinc 7.125 2.977 Tantalum 2.196 Total suspended solids 200.100 95.160 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times.