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40 C.F.R. § 421.334

Standards of performance for new sources.

§ 421.334 Standards of performance for new sources.

Any new source subject to this subpart shall achieve the following new source performance standards:

(a) Sand drying wet air pollution control.

NSPS for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced
Chromium (total)0.2100.085
Cyanide (total)0.1140.045
Lead0.1590.074
Nickel0.3120.210
Ammonia (as N)75.71033.280
Total suspended solids8.5206.816
pH( 1)( 1)

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

(b) Sand chlorination off-gas wet air pollution control.

NSPS for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced
Chromium (total)16.0806.521
Cyanide (total)8.6943.478
Lead12.1705.651
Nickel23.91016.080
Ammonia (as N)5,795.0002,547.000
Total suspended solids652.100521.000
pH( 1)( 1)

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

(c) Sand chlorination area-vent wet air pollution control.

NSPS for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced
Chromium (total)3.1541.279
Cyanide (total)1.7050.682
Lead2.3871.108
Nickel4.6883.154
Ammonia (as N)1,136.000499.500
Total suspended solids127.900102.300
pH( 1)( 1)

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

(d) SiC14 purification wet air pollution control.

NSPS for the Primary Zirconium and Hafnium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of zirconium dioxide and hafnium dioxide produced
Chromium (total)2.7741.125
Cyanide (total)1.5000.600
Lead2.0990.975
Nickel4.1242.774
Ammonia (as N)999.500439.400
Total suspended solids112.50089.980
pH( 1)( 1)
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