Regulations last checked for updates: May 19, 2024

Title 40 - Protection of Environment last revised: May 16, 2024
All TitlesTitle 40Chapter IPart 421Subpart AE - Subpart AE—Primary Zirconium and Hafnium Subcategory
View all text of Subpart AE [§ 421.330 - § 421.337]
§ 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)

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

(e) Feed makeup 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)2.1030.852
Cyanide (total)1.1370.455
Lead1.5910.739
Nickel3.1262.103
Ammonia (as N)757.500333.000
Total suspended solids85.25068.200
pH( 1)( 1)

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

(f) Iron extraction (MIBK) steam stripper bottoms.

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)0.8300.337
Cyanide (total)0.4490.180
Lead0.6280.292
Nickel1.2340.830
Ammonia (as N)299.100131.500
Total suspended solids33.66026.930
pH( 1)( 1)

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

(g) Zirconium filtrate.

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)14.3505.819
Cyanide (total)7.7583.103
Lead10.8605.043
Nickel21.33014.350
Ammonia (as N)5,171.0002,273.000
Total suspended solids581.900465.500
pH( 1)( 1)

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

(h) Hafnium filtrate.

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)0.0000.000
Cyanide (total)0.0000.000
Lead0.0000.000
Nickel0.0000.000
Ammonia (as N)0.0000.000
Total suspended solids0.0000.000
pH( 1)( 1)

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

(i) Calcining caustic 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)3.3291.350
Cyanide (total)1.7990.720
Lead2.5191.170
Nickel4.9483.329
Ammonia (as N)1,199.000527.200
Total suspended solids135.000108.000
pH( 1)( 1)

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

(j) Pure chlorination 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 and hafnium produced
Chromium (total)14.1805.748
Cyanide (total)7.6633.065
Lead10.7304.981
Nickel21.07014.180
Ammonia (as N)5,108.0002,245.000
Total suspended solids574.800459.800
pH( 1)( 1)

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

(k) Reduction 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 and hafnium produced
Chromium (total)1.3640.553
Cyanide (total)0.7370.295
Lead1.0320.479
Nickel2.0271.364
Ammonia (as N)491.300216.000
Total suspended solids55.29044.230
pH( 1)( 1)

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

(l) Magnesium recovery 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 and hafnium produced
Chromium (total)7.6713.110
Cyanide (total)4.1471.659
Lead5.8052.695
Nickel11.4007.671
Ammonia (as N)2,764.0001,215.000
Total suspended solids404.300248.800
pH( 1)( 1)

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

(m) Magnesium recovery area-vent wet air pollution control.

NSPS Limitations 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 and hafnium produced
Chromium (total)4.2621.728
Cyanide (total)2.3040.921
Lead3.2251.497
Nickel6.3354.262
Ammonia (as N)1,535.000675.000
Total suspended solids172.800138.200
pH( 1)( 1)

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

(n) Zirconium chip crushing west 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 and hafnium produced
Chromium (total)0.0000.000
Cyanide (total)0.0000.000
Lead0.0000.000
Nickel0.0000.000
Ammonia (as N)0.0000.000
Total suspended solids0.0000.000
pH( 1)( 1)

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

(o) Acid leachate from zirconium metal production.

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 pure zirconium produced
Chromium (total)10.9004.420
Cyanide (total)5.8932.357
Lead8.2503.831
Nickel16.21010.900
Ammonia (as N)3,928.0001,674.000
Total suspended solids442.000353.600
pH( 1)( 1)

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

(p) Acid leachate from zirconium alloy production.

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 contained in alloys produced
Chromium (total)5.8352.366
Cyanide (total)3.1541.262
Lead4.4162.050
Nickel8.6745.835
Ammonia (as N)2,102.000895.800
Total suspended solids236.600189.300
pH( 1)( 1)

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

(q) Leaching rinse water from zirconium metal production.

NSPS Limitations 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 pure zirconium produced
Chromium (total)21.8108.840
Cyanide (total)11.7904.715
Lead16.5007.661
Nickel32.41021.810
Ammonia (as N)7,856.0003,453.000
Total suspended solids884.000707.200
pH( 1)( 1)

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

(r) Leaching rinse water from zirconium alloy production.

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 contained in alloys produced
Chromium (total)0.2920.118
Cyanide (total)0.1580.063
Lead0.2210.103
Nickel0.4340.292
Ammonia (as N)105.20046.240
Total suspended solids11.8409.468
pH( 1)( 1)

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

authority: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307 (b) and (c), 308 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) and the Water Quality Act of 1987 (the “Act”); 33 U.S.C. 1311,1314,c,e,and, 1316 (b) andc, 1317 (b) andc,1318; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 101 Stat. 7, Pub. L. 100-4
source: 49 FR 8790, Mar. 8, 1984, unless otherwise noted.
cite as: 40 CFR 421.334
© 2014 CustomsMobile | Disclaimer | Privacy | About