40 CFR 461.72: Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

(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 available technology economically achievable:

(1) Subpart G—Wet Amalgamated Powder Anodes.

BAT Effluent Limitations

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

Metric units—mg/kg of Zinc

English units—pounds per 1,000,000 pounds of Zinc

Chromium 0.24 0.099

Mercury 0.14 0.055

Silver 0.23 0.093

Zinc 0.80 0.34

Manganese 0.37 0.16

(2) Subpart G—Gelled Amalgam Anodes.

BAT Effluent Limitations

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

Metric units—mg/kg of Zinc

English units—pounds per 1,000,000 pounds of Zinc

Chromium 0.030 0.012

Mercury 0.017 0.007

Silver 0.028 0.012

Zinc 0.099 0.042

Manganese 0.046 0.020

(3) Subpart G—Zinc Oxide Formed Anodes.

BAT Effluent Limitations

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

Metric units—mg/kg of Zinc

English units—pounds per 1,000,000 pounds of Zinc

Chromium 9.53 3.90

Mercury 5.42 2.17

Silver 8.89 3.68

Zinc 31.64 13.22

Manganese 14.74 6.28

(4) Subpart G—Electrodeposited Anodes.

BAT Effluent Limitations

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

Metric units—mg/kg of zinc deposited

English units—pounds per 1,000,000 pounds of zinc deposited

Chromium 94.47 38.65

Mercury 53.68 21.47

Silver 88.03 36.50

Zinc 313.46 130.97

Manganese 146.00 62.26

(5) Subpart G—Silver Powder Formed Cathodes.

BAT Effluent Limitations

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

Metric units—mg/kg of silver applied

English units—pounds per 1,000,000 pounds of silver applied

Chromium 13.07 5.35

Mercury 7.43 2.97

Silver 12.18 5.05

Zinc 43.36 18.12

Manganese 20.20 8.61

(6) Subpart G—Silver Oxide Powder Formed Cathodes.

BAT Effluent Limitations

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

Metric units—mg/kg of silver applied

English units—pounds per 1,000,000 pounds of silver applied

Chromium 8.73 3.57

Mercury 4.96 1.99

Silver 8.14 3.37

Zinc 28.98 12.11

Manganese 13.50 5.76

(7) Subpart G—Silver Peroxide Cathodes.

BAT Effluent Limitations

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

Metric units—mg/kg of silver applied

English units—pounds per 1,000,000 pounds of silver applied

Chromium 2.09 0.87

Mercury 1.19 0.48

Silver 1.95 0.81

Zinc 6.95 2.90

Manganese 3.24 1.38

(8) Subpart G—Nickel Impregnated Cathodes.

BAT Effluent Limitations

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

Metric units—mg/kg of nickel applied

English units—pounds per 1,000,000 pounds of nickel applied

Chromium 88.0 36.0

Mercury 50.0 20.0

Nickel 384.0 254.0

Silver 82.0 34.0

Zinc 292.0 122.0

Manganese 136.0 58.0

(9) Subpart G—Miscellaneous Wastewater Streams.

BAT Effluent Limitations

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

Metric units—mg/kg of cells produced

English units—pounds per 1,000,000 pounds of cells produced

Chromium 0.57 0.23

Cyanide 0.38 0.16

Mercury 0.32 0.13

Nickel 2.48 1.64

Silver 0.53 0.22

Zinc 1.88 0.79

Manganese 0.88 0.37

(10) Subpart G—Silver Etch.

BAT Effluent Limitations

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

Metric units—mg/kg of silver processed

English units—pounds per 1,000,000 pounds of silver processed

Chromium 3.27 1.34

Mercury 1.86 0.74

Silver 3.05 1.26

Zinc 10.86 4.54

Manganese 5.06 2.16

(11) Subpart G—Silver Peroxide Production.

BAT Effluent Limitations

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

Metric units—mg/kg of silver peroxide produced

English units—pounds per 1,000,000 pounds of silver peroxide produced

Chromium 3.48 1.42

Mercury 1.98 0.79

Silver 3.24 1.34

Zinc 11.55 4.83

Manganese 5.38 2.29

(12) Subpart G—Silver Powder Production.

BAT Effluent Limitations

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

Metric units—mg/kg of silver powder produced

English units—pounds per 1,000,000 pounds of silver powder produced

Chromium 1.41 0.58

Mercury 0.80 0.32

Silver 1.32 0.55

Zinc 4.69 1.96

Manganese 2.18 0.93

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