40 C.F.R. § 421.305

Current through October 31, 2024
Section 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)0.3460.140
Lead0.2620.122
Nickel0.5150.346
Titanium0.4960.215

(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)0.3850.156
Lead0.2910.135
Nickel0.5720.385
Titanium0.5510.239

(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)0.0690.028
Lead0.0520.024
Nickel0.1030.069
Titanium0.0990.043

(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)1.5280.620
Lead1.1560.537
Nickel2.2721.528
Titanium2.1890.950

(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)0.7870.319
Lead0.5950.276
Nickel1.1690.787
Titanium1.1270.489

(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)11.0104.463
Lead8.3323.868
Nickel16.37011.010
Titanium15.7706.844

(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)0.4740.192
Lead0.3590.167
Nickel0.7050.474
Titanium0.6790.295

(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)0.8480.344
Lead0.6420.298
Nickel1.2610.848
Titanium1.2150.527

(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)4.3811.776
Lead3.3151.539
Nickel6.5124.381
Titanium6.2752.723

(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)0.2390.097
Lead0.1810.084
Nickel0.3560.239
Titanium0.3430.149

(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)0.0230.009
Lead0.0170.008
Nickel0.0340.023
Titanium0.0320.014

(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)0.0840.034
Lead0.0640.030
Nickel0.1250.084
Titanium0.1200.052

(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)6.6842.710
Lead5.0582.348
Nickel9.9356.684
Titanium9.5744.155

(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)0.1760.072
Lead0.1340.062
Nickel0.2620.176
Titanium0.2530.110

(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)27.00010.950
Lead20.4309.486
Nickel40.14027.000
Titanium38.68016.780

40 C.F.R. §421.305