40 CFR 461.31: Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

(a) 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:

(1) Subpart C—Closed Formation—Double Fill, or Fill and Dump.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

Metric units—mg/kg of lead used

English units—pounds per 1,000,000 pounds of lead used

Copper 0.86 0.45

Lead 0.19 0.090

Iron 0.54 0.27

Oil and grease 9.00 5.40

TSS 18.45 8.78

pH (1) (1)

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

(2) Subpart C—Open Formation—Dehydrated.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

Metric units—mg/kg of lead used

English units—pounds per 1,000,000 pounds of lead used

Copper 20.99 11.05

Lead 4.64 2.21

Iron 16.13 6.74

Oil and grease 221.00 132.60

TSS 453.05 215.47

pH (1) (1)

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

(3) Subpart C—Open Formation—Wet.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

Metric units—mg/kg of lead used

English units—pounds per 1,000,000 pounds of lead used

Copper 0.10 0.05

Lead 0.02 0.01

Iron 0.06 0.03

Oil and grease 1.06 0.64

TSS 2.17 1.03

pH (1) (1)

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

(4) Subpart C—Plate Soak.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

Metric units—mg/kg of lead used

English units—pounds per 1,000,000 pounds of lead used

Copper 0.040 0.020

Lead 0.009 0.004

Iron 0.030 0.010

Oil and grease 0.420 0.250

TSS 0.860 0.410

pH (1) (1)

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

(5) Subpart C—Battery Wash (with Detergent).

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

Metric units—mg/kg of lead used

English units—pounds per 1,000,000 pounds of lead used

Copper 1.71 0.90

Lead 0.38 0.18

Iron 1.08 0.55

Oil and grease 18.00 10.80

TSS 36.90 17.55

pH (1) (1)

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

(6) Subpart C—Battery Wash (Water Only).

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

Metric units—mg/kg of lead used

English units—pounds per 1,000,000 pounds of lead used

Copper 1.12 0.59

Lead 0.25 0.12

Iron 0.71 0.36

Oil and grease 11.80 7.08

TSS 24.19 11.51

pH (1) (1)

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

(7) Subpart C—Direct Chill Lead Casting.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

Metric units—mg/kg of lead used

English units—pounds per 1,000,000 pounds of lead used

Copper 0.00040 0.00020

Lead 0.00008 0.00004

Iron 0.00020 0.00010

Oil and grease 0.00400 0.00200

TSS 0.00800 0.00300

pH (1) (1)

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

(8) Subpart C—Mold Release Formulation.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

Metric units—mg/kg of lead used

English units—pounds per 1,000,000 pounds of lead used

Copper 0.011 0.006

Lead 0.002 0.001

Iron 0.007 0.004

Oil and grease 0.120 0.072

TSS 0.246 0.117

pH (1) (1)

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

(9) Subpart C—Truck Wash.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

Metric units—mg/kg of lead in trucked batteries

English units—pounds per 1,000,000 pounds of lead in trucked batteries

Copper 0.026 0.014

Lead 0.005 0.002

Iron 0.016 0.008

Oil and grease 0.280 0.168

TSS 0.574 0.273

pH (1) (1)

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

(10) Subpart C—Laundry.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

Metric units—mg/kg of lead used

English units—pounds per 1,000,000 pounds of lead used

Copper 0.21 0.11

Lead 0.05 0.02

Iron 0.13 0.07

Oil and grease 2.18 1.31

TSS 4.47 2.13

pH (1) (1)

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

(11) Subpart C—Miscellaneous Wastewater Streams.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

Metric units—mg/kg of lead used

English units—pounds per 1,000,000 pounds of lead used

Copper 0.81 0.43

Lead 0.18 0.09

Iron 0.51 0.26

Oil and grease 8.54 5.12

TSS 17.51 8.33

pH (1) (1)

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

(b) There shall be no discharge allowance for process wastewater pollutants from any battery manufacturing operation other than those battery manufacturing operations listed above.