Regulations last checked for updates: May 19, 2024

Title 40 - Protection of Environment last revised: May 16, 2024
All TitlesTitle 40Chapter IPart 421Subpart AB - Subpart AB—Primary and Secondary Titanium Subcategory
View all text of Subpart AB [§ 421.300 - § 421.307]
§ 421.302 - 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) Chlorination off-gas wet air pollution control.

BPT Limitations for the Primary and Secondary Titanium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of TiCl4 produced
Chromium (total)0.4120.168
Lead0.3930.187
Nickel1.7971.189
Titanium0.8800.384
Oil and grease18.72011.230
Total suspended solids38.38018.250
pH( 1)( 1)

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

(b) Chlorination area-vent wet air pollution control.

BPT Limitations for the Primary and Secondary Titanium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of TiCl4 produced
Chromium (total)0.4120.168
Chromium (total)0.4580.187
Lead0.4370.208
Nickel1.9971.321
Titanium0.9780.426
Oil and grease20.80012.480
Total suspended solids42.64020.280
pH( 1)( 1)

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

(c) TiCl4 handling wet air pollution control.

BPT Limitations for the Primary and Secondary Titanium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of TiCl4 handled
Chromium (total)0.0820.034
Lead0.0790.037
Nickel0.3590.237
Titanium0.1760.077
Oil and grease3.7402.244
Total suspended solids7.6673.647
pH( 1)( 1)

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

(d) Reduction area wet air pollution control.

BPT Limitations for the Primary and Secondary Titanium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of titanium produced
Chromium (total)18.1707.435
Lead17.3508.261
Nickel79.30052.450
Titanium38.82016.930
Oil and grease826.100495.600
Total suspended solids1,693.000805.400
pH( 1)( 1)

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

(e) Melt cell wet air pollution control.

BPT Limitations for the Primary and Secondary Titanium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of titanium produced
Chromium (total)9.3523.826
Lead8.9274.251
Nickel40.81026.990
Titanium19.9808.714
Oil and grease425.100255.000
Total suspended solids871.400414.500
pH( 1)( 1)

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

(f) Chlorine liquefaction wet air pollution control.

BPT Limitations for the Primary and Secondary Titanium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of titanium produced
Chromium (total)130.90053.560
Lead125.00059.510
Nickel571.300377.900
Titanium279.700122.000
Oil and grease5,951.0003,571.000
Total suspended solids12,200.0005,702.000
pH( 1)( 1)

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

(g) Sodium reduction container reconditioning wash water.

BPT Limitations for the Primary and Secondary Titanium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of titanium produced
Chromium (total)0.5640.231
Lead0.5380.256
Nickel2.4611.628
Titanium1.2050.526
Oil and grease25.64015.380
Total suspended solids52.56025.000
pH( 1)( 1)

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

(h) Chip crushing wet air pollution control.

BPT Limitations for the Primary and Secondary Titanium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of titanium produced
Chromium (total)10.0904.126
Lead9.6274.584
Nickel44.01029.110
Titanium21.5509.398
Oil and grease458.400275.100
Total suspended solids939.800447.000
pH( 1)( 1)

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

(i) Acid leachate and rinse water.

BPT Limitations for the Primary and Secondary Titanium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of titanium produced
Chromium (total)5.2102.131
Lead4.9732.368
Nickel22.73015.040
Titanium11.1304.854
Oil and grease236.800142.100
Total suspended solids485.400230.900
pH( 1)( 1)

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

(j) Sponge crushing and screening wet air pollution control.

BPT Limitations for the Primary and Secondary Titanium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of titanium produced
Chromium (total)2.8471.165
Lead2.7171.294
Nickel12.4208.217
Titanium6.0822.653
Oil and grease129.40077.640
Total suspended solids265.300126.200
pH( 1)( 1)

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

(k) Acid pickle and wash water.

BPT Limitations for the Primary and Secondary Titanium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of titanium pickled
Chromium (total)0.0270.011
Lead0.0260.012
Nickel0.1170.077
Titanium0.0570.025
Oil and grease1.2200.732
Total suspended solids2.5011.190
pH( 1)( 1)

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

(l) Scrap milling wet air pollution control.

BPT Limitations for the Primary and Secondary Titanium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of scrap milled
Chromium (total)0.9950.407
Lead0.9500.452
Nickel4.3412.871
Titanium2.1250.927
Oil and grease45.22027.130
Total suspended solids92.70044.090
pH( 1)( 1)

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

(m) Scrap detergent wash water.

BPT Limitations for the Primary and Secondary Titanium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of scrap washed
Chromium (total)7.9483.252
Lead7.5873.613
Nickel34.68022.940
Titanium16.9807.406
Oil and grease361.300216.800
Total suspended solids740.600352.300
pH( 1)( 1)

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

(n) Casting crucible wash water.

BPT Limitations for the Primary and Secondary Titanium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of titanium cast
Chromium (total)0.2100.086
Lead0.2000.095
Nickel0.9160.606
Titanium0.4480.196
Oil and grease9.5405.724
Total suspended solids19.5609.302
pH( 1)( 1)

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

(o) Casting contact cooling water.

BPT Limitations for the Primary and Secondary Titanium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of titanium cast
Chromium (total)321.100131.400
Lead306.500145.900
Nickel1,401.000926.800
Titanium685.900299.200
Oil and grease14,590.0008,757.000
Total suspended solids29,920.00014,230.000
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 421.302
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