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

§ 468.11 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 representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available:

(a) Subpart A—Hot Rolling Spent Lubricant BPT Effluent Limitations.

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
Metric units—mg/off-kg of copper or copper alloy hot rolled
English units—pounds per 1,000,000 off-pounds of copper or copper alloy hot rolled
Chromium0.0450.018
Copper0.1950.103
Lead0.0150.013
Nickel0.1970.130
Zinc0.1500.062
Oil and grease2.0601.236
TSS4.2232.008
pH( 1)( 1)

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

(b) Subpart A—Cold Rolling Spent Lubricant BPT Effluent Limitations.

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
Metric units—mg/off-kg of copper or copper alloy cold rolled
English units—pounds per 1,000,000 off-pounds of copper or copper alloy cold rolled
Chromium0.1660.068
Copper0.7200.379
Lead0.0560.049
Nickel0.7270.481
Zinc0.5530.231
Oil and grease7.5804.548
TSS15.5397.390
pH( 1)( 1)

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

(c) Subpart A—Drawing Spent Lubricant BPT Effluent Limitations.

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
Metric units—mg/off-kg of copper or copper alloy drawn
English units—pounds per 1,000,000 off-pounds of copper or copper alloy drawn
Chromium0.0370.015
Copper0.1610.085
Lead0.0120.011
Nickel0.1630.107
Zinc0.1240.051
Oil and grease1.7001.020
TSS3.4851.657
pH( 1)( 1)

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

(d) Subpart A—Solution Heat Treatment BPT Effluent Limitations.

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