Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

§ 471.61 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations for the process operations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):

(a) Rolling spent neat oils—subpart F—BPT. There shall be no discharge of process wastewater pollutants.

(b) Rolling contact cooling water.

Subpart F—BPT

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of titanium rolled with contact cooling water
Cyanide1.40.586
Lead2.050.976
Zinc7.132.98
Ammonia651286
Fluoride291129
Oil and grease97.058.0
TSS200.095.0
pH( 1)( 1)

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

(c) Drawing spent neat oils—subpart F—BPT. There shall be no discharge of process wastewater pollutants.

(d) Extrusion spent neat oils—subpart F—BPT. There shall be no discharge of process wastewater pollutants.

(e) Extrusion spent emulsions.

Subpart F—BPT

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of titanium extruded
Cyanide0.0210.009
Lead0.0300.015
Zinc0.1050.044
Ammonia9.594.22
Fluoride4.281.9
Oil and grease1.440.863
TSS2.951.4
pH( 1)( 1)

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

(f) Extrusion press hydraulic fluid leakage.

Subpart F—BPT

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/off-kg (pounds per million off-pounds) of titanium extruded
Cyanide0.0520.022
Lead0.0750.036
Zinc0.2600.109
Ammonia23.710.5
Fluoride10.64.70
Oil and grease3.562.14
TSS7.303.47
pH( 1)( 1)
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