40 CFR 421.295: Pretreatment standards for existing sources.

Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources. The mass of wastewater pollutants in secondary tin process wastewater introduced into a POTW must not exceed the following values:

(a) Tin smelter SO2 scrubber.

PSES 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.

PSES 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.

PSES 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.

PSES 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.

PSES 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.

PSES 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.

PSES 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 12.240

(h) Tin hydroxide supernatant from plating solutions and sludges.

PSES 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.

PSES 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