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40 C.F.R. § 421.312

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

§ 421.312 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) Tungsten detergent wash and rinse.

BPT Limitations for the Secondary Tungsten and Cobalt Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of tungsten scrap washed
Copper0.3710.195
Nickel0.3740.248
Ammonia (as N)25.99011.430
Cobalt0.7680.337
Tungsten1.3570.542
Oil and grease3.9002.340
Total suspended solids7.9953.803
pH( 1)( 1)

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

(b) Tungsten leaching acid.

BPT Limitations for the Secondary Tungsten and Cobalt Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of tungsten produced
Copper4.8852.571
Nickel4.9373.265
Ammonia (as N)342.700150.700
Cobalt10.1304.448
Tungsten17.8907.147
Oil and grease51.42030.850
Total suspended solids105.40050.140
pH( 1)( 1)

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

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