Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

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 available technology economically achievable: (a) Tin smelter SO 2 scrubber. BAT Limitations for the Secondary Tin Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of crude tapped tin produced Arsenic 12.790 5.703 Lead 2.575 1.196 Iron 11.040 5.611 Tin 3.495 2.024 (b) Dealuminizing rinse. BAT Limitations for the Secondary Tin Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of dealuminized scrap produced Lead 0.010 0.005 Cyanide (total) 0.007 0.003 Fluoride 1.225 0.697 Tin 0.013 0.008 (c) Tin mud acid neutralization filtrate. BAT Limitations for the Secondary Tin Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of neutralized dewatered tin mud produced Lead 1.413 0.656 Cyanide (total) 1.009 0.404 Fluoride 176.600 100.400 Tin 1.918 1.110 (d) Tin hydroxide wash. BAT Limitations for the Secondary Tin Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tin hydroxide washed Lead 3.347 1.554 Cyanide (total) 2.391 0.956 Fluoride 418.400 237.900 Tin 4.542 2.630 (e) Spent electrowinning solution from new scrap. BAT Limitations for the Secondary Tin Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of cathode tin produced Lead 4.704 2.184 Cyanide (total) 3.360 1.344 Fluoride 588.000 334.300 Tin 6.384 3.696 (f) Spent electrowinning solution from municipal solid waste. BAT Limitations for the Secondary Tin Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of MSW scrap used as raw material Lead 0.033 0.015 Cyanide (total) 0.024 0.010 Fluoride 4.165 2.368 Tin 0.045 0.026 (g) Tin hydroxide supernatant from scrap. BAT Limitations for the Secondary Tin Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tin metal recovered from scrap Lead 15.580 7.233 Cyanide (total) 11.130 4.451 Fluoride 1,947.000 1,107.000 Tin 21.140 21.240 (h) Tin hydroxide supernatant from plating solutions and sludges. BAT Limitations for the Secondary Tin Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tin metal recovered from plating solutions and sludges Lead 32.20 14.95 Cyanide (total) 23.00 9.20 Fluoride 4,025.00 2,289.00 Tin 43.70 25.30 (i) Tin hydroxide filtrate. BAT Limitations for the Secondary Tin Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tin metal produced Lead 7.012 3.256 Cyanide (total) 5.009 2.004 Fluoride 876.500 498.400 Tin 9.517 5.510