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40 C.F.R. § 421.292

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

§ 421.292 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) Tin smelter SO2 scrubber.

BPT 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 metal produced
Arsenic19.2208.554
Lead3.8631.840
Iron11.0405.611
Tin3.4952.024
Total suspended solids377.100179.400
pH( 1)( 1)

1 Within the range of 7.5 to 10.0 at all times.

(b) Dealuminizing rinse.

BPT 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
Lead0.0150.007
Cyanide (total)0.0100.004
Fluoride1.2250.700
Tin0.0130.008
Total suspended solids1.4350.683
pH( 1)( 1)
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