CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS (Parts 400–471) > PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY > SUBPART AB—Primary and Secondary Titanium Subcategory (§421.300 to §421.307) > 421.305—Pretreatment standards for existing sources.

421.305—Pretreatment standards for existing sources.

Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources. The mass of wastewater pollutants in primary and secondary titanium process wastewater introduced into a POTW must not exceed the following values:
(a) Chlorination off-gas wet air pollution control.
PSES 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) 0.346 0.140
Lead 0.262 0.122
Nickel 0.515 0.346
Titanium 0.496 0.215
Code of Federal Regulations 606
(b) Chlorination Area-vent wet air pollution control.
PSES 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) 0.385 0.156
Lead 0.291 0.135
Nickel 0.572 0.385
Titanium 0.551 0.239
(c) TiCl4 handling wet air pollution control.
PSES 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) 0.069 0.028
Lead 0.052 0.024
Nickel 0.103 0.069
Titanium 0.099 0.043
(d) Reduction area wet air pollution control.
PSES 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) 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.
PSES 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) 0.787 0.319
Lead 0.595 0.276
Nickel 1.169 0.787
Titanium 1.127 0.489
(f) Chlorine liquefaction wet air pollution control.
PSES 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) 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.
PSES 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) 0.474 0.192
Lead 0.359 0.167
Nickel 0.705 0.474
Titanium 0.679 0.295
(h) Chip crushing wet air pollution control.
PSES 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) 0.848 0.344
Lead 0.642 0.298
Nickel 1.261 0.848
Titanium 1.215 0.527
(i) Acid leachate and rinse water.
PSES 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) 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.
PSES 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) 0.239 0.097
Lead 0.181 0.084
Nickel 0.356 0.239
Titanium 0.343 0.149
(k) Acid pickle and wash water.
PSES 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) 0.023 0.009
Lead 0.017 0.008
Nickel 0.034 0.023
Titanium 0.032 0.014
(l) Scrap milling wet air pollution control.
PSES 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) 0.084 0.034
Lead 0.064 0.030
Nickel 0.125 0.084
Titanium 0.120 0.052
(m) Scrap detergent wash water.
PSES 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) 6.684 2.710
Lead 5.058 2.348
Nickel 9.935 6.684
Titanium 9.574 4.155
(n) Casting crucible wash water.
PSES 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) 0.176 0.072
Lead 0.134 0.062
Nickel 0.262 0.176
Titanium 0.253 0.110
(o) Casting contact cooling water.
PSES 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) 27.000 10.950
Lead 20.430 9.486
Nickel 40.140 27.000
Titanium 38.680 16.780