421.303—Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
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 available technology economically achievable:
(a)
Chlorination off-gas wet air pollution control.
BAT Limitations for the Primary and Secondary Titanium Subcategory
|
mg/kg (pounds per million pounds) of TiCl4 produced |
| Chromium (total) |
0.346 |
0.140 |
| Lead |
0.262 |
0.122 |
| Nickel |
0.515 |
0.346 |
| Titanium |
0.496 |
0.215 |
(b)
Chlorination area-vent wet air pollution control.
BAT Limitations for the Primary and Secondary Titanium Subcategory
|
mg/kg (pounds per million pounds) of TiCl4 produced |
| Chromium (total) |
0.385 |
0.156 |
| Lead |
0.291 |
0.135 |
| Nickel |
0.572 |
0.385 |
| Titanium |
0.551 |
0.239 |
(c)
TiCl4 handling wet air pollution control.
BAT Limitations for the Primary and Secondary Titanium Subcategory
|
mg/kg (pounds per million pounds) of TiCl4 handled |
| Chromium (total) |
0.069 |
0.028 |
| Lead |
0.052 |
0.024 |
| Nickel |
0.103 |
0.069 |
| Titanium |
0.099 |
0.043 |
(d)
Reduction area wet air pollution control.
BAT Limitations for the Primary and Secondary Titanium Subcategory
|
mg/kg (pounds per million pounds) of titanium produced |
| Chromium (total) |
1.528 |
0.620 |
| Lead |
1.156 |
0.537 |
| Nickel |
2.272 |
1.528 |
| Titanium |
2.189 |
0.950 |
(e)
Melt cell wet air pollution control.
BAT Limitations for the Primary and Secondary Titanium Subcategory
|
mg/kg (pounds per million pounds) of titanium produced |
| Chromium (total) |
0.787 |
0.319 |
| Lead |
0.595 |
0.276 |
| Nickel |
1.169 |
0.787 |
| Titanium |
1.127 |
0.489 |
(f)
Chlorine liquefaction wet air pollution control.
BAT Limitations for the Primary and Secondary Titanium Subcategory
|
mg/kg (pounds per million pounds) of titanium produced |
| Chromium (total) |
11.010 |
4.463 |
| Lead |
8.332 |
3.868 |
| Nickel |
16.370 |
11.010 |
| Titanium |
15.770 |
6.844 |
(g)
Sodium reduction container reconditioning wash water.
BAT Limitations for the Primary and Secondary Titanium Subcategory
|
mg/kg (pounds per million pounds) of titanium produced |
| Chromium (total) |
0.474 |
0.192 |
| Lead |
0.359 |
0.167 |
| Nickel |
0.705 |
0.474 |
| Titanium |
0.679 |
0.295 |
(h)
Chip crushing wet air pollution control.
BAT Limitations for the Primary and Secondary Titanium Subcategory
|
mg/kg (pounds per million pounds) of titanium produced |
| Chromium (total) |
0.848 |
0.344 |
| Lead |
0.642 |
0.298 |
| Nickel |
1.261 |
0.848 |
| Titanium |
1.215 |
0.527 |
(i)
Acid leachate and rinse water.
BAT Limitations for the Primary and Secondary Titanium Subcategory
|
mg/kg (pounds per million pounds) of titanium produced |
| Chromium (total) |
4.381 |
1.776 |
| Lead |
3.315 |
1.539 |
| Nickel |
6.512 |
4.381 |
| Titanium |
6.275 |
2.723 |
(j)
Sponge crushing and screening wet air pollution control.
BAT Limitations for the Primary and Secondary Titanium Subcategory
|
mg/kg (pounds per million pounds) of titanium produced |
| Chromium (total) |
0.239 |
0.097 |
| Lead |
0.181 |
0.084 |
| Nickel |
0.356 |
0.239 |
| Titanium |
0.343 |
0.149 |
(k)
Acid pickle and wash water.
BAT Limitations for the Primary and Secondary Titanium Subcategory
|
mg/kg (pounds per million pounds) of titanium pickled |
| Chromium (total) |
0.023 |
0.009 |
| Lead |
0.017 |
0.008 |
| Nickel |
0.034 |
0.023 |
| Titanium |
0.032 |
0.014 |
(l)
Scrap milling wet air pollution control.
BAT Limitations for the Primary and Secondary Titanium Subcategory
|
mg/kg (pounds per million pounds) of scrap milled |
| Chromium (total) |
0.084 |
0.034 |
| Lead |
0.064 |
0.030 |
| Nickel |
0.125 |
0.084 |
| Titanium |
0.120 |
0.052 |
(m)
Scrap detergent wash water.
BAT Limitations for the Primary and Secondary Titanium Subcategory
|
mg/kg (pounds per million pounds) of scrap washed |
| Chromium (total) |
6.684 |
2.710 |
| Lead |
5.058 |
2.348 |
| Nickel |
9.935 |
6.684 |
| Titanium |
9.574 |
4.155 |
(n)
Casting crucible wash water.
BAT Limitations for the Primary and Secondary Titanium Subcategory
|
mg/kg (pounds per million pounds) of titanium cast |
| Chromium (total) |
0.176 |
0.072 |
| Lead |
0.134 |
0.062 |
| Nickel |
0.262 |
0.176 |
| Titanium |
0.253 |
0.110 |
(o)
Casting contact cooling water.
BAT Limitations for the Primary and Secondary Titanium Subcategory
|
mg/kg (pounds per million pounds) of titanium cast |
| Chromium (total) |
27.000 |
10.950 |
| Lead |
20.430 |
9.486 |
| Nickel |
40.140 |
27.000 |
| Titanium |
38.68 |
16.78 |