Wisconsin Administrative Code › Department of Natural Resources › NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System › Chapter NR 256 - Metal molding and casting › Subchapter II - Copper Casting Subcategory › Section NR 256.23 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable

Current through June 24, 2024
Except as provided in
					 40 CFR 125.30
					 to
					 125.32, any
					 existing point source subject to this subchapter, including noncontinuous
					 direct dischargers, shall achieve the following BAT effluent limitations.
					 Grinding scrubber operations may not discharge process wastewater pollutants to
					 waters of the state.
TABLE 21
COPPER CASTING SUBCATEGORY
CASTING QUENCH OPERATIONS
BAT Effluent Limitations
Noncontinuous Direct Dischargers
Maximum for any 1 day
Maximum for monthly average
Maximum for any 1 day
Maximum for monthly average
Annual average
Pollutant or pollutant property
kg/1,000 kkg (pounds per million pounds) of metal
								  poured
mg/l(1)
mg/l(1)
(2)
Copper (T)
0.0307
0.0168
0.77
0.42
0.0068
Lead (T)
0.0211
0.0104
0.53
0.26
0.006
Zinc (T)
0.0303
0.0116
0.76
0.29
0.0072
(1) These concentrations shall be multiplied by the ratio
					 of (4.8/x) where x is the actual normalized process wastewater discharge flow
					 (in gallons per 1,000 pounds of metal poured) for a specific plant.
(2) kg/1,000 kkg (pounds per million pounds) of metal
					 poured.
TABLE 22
COPPER CASTING SUBCATEGORY
DIRECT CHILL CASTING OPERATIONS
BAT Effluent Limitations
Noncontinuous Direct Dischargers
Maximum for any 1 day
Maximum for monthly average
Maximum for any 1 day
Maximum for monthly average
Annual average
Pollutant or pollutant property
kg/1,000 kkg (pounds per million pounds) of metal
								  poured
mg/l(1)
mg/l(1)
(2)
Copper (T)
0.928
0.506
0.77
0.42
0.205
Lead (T)
0.639
0.314
0.53
0.26
0.181
Zinc (T)
0.916
0.35
0.76
0.29
0.217
(1) These concentrations shall be multiplied by the ratio
					 of (145/x) where x is the actual normalized process wastewater discharge flow
					 (in gallons per 1,000 pounds of metal poured) for a specific plant.
(2) kg/1,000 kkg (pounds per million pounds) of metal
					 poured.
TABLE 23
COPPER CASTING SUBCATEGORY
DUST COLLECTION SCRUBBER OPERATIONS
BAT Effluent Limitations
Noncontinuous Direct Dischargers
Maximum for any 1 day
Maximum for monthly average
Maximum for any 1 day
Maximum for monthly average
Annual average
Pollutant or pollutant property
kg/62.3 million Sm3
								  (pounds per billion SCF) of air scrubbed
mg/l(1)
mg/l(1)
(2)
Copper (T)
0.553
0.301
0.77
0.42
0.122
Lead (T)
0.38
0.187
0.53
0.26
0.108
Zinc (T)
0.545
0.208
0.76
0.29
0.129
Total phenols
0.617
0.215
0.86
0.3
0.144
(1) These concentrations shall be multiplied by the ratio
					 of (0.086/x) where x is the actual normalized process wastewater discharge flow
					 (in gallons per 1,000 SCF of air scrubbed) for a specific plant.
(2) kg/62.3 million Sm3 (pounds per billion SCF) of air
					 scrubbed.
TABLE 24
COPPER CASTING SUBCATEGORY
INVESTMENT CASTING
BAT Effluent Limitations
Noncontinuous Direct Dischargers
Maximum for any 1 day
Maximum for monthly average
Maximum for any 1 day
Maximum for monthly average
Annual average
Pollutant or pollutant property
kg/1,000 kkg (pounds per million pounds) of metal
								  poured
mg/l(1)
mg/l(1)
(2)
Copper (T)
8.48
4.63
0.77
0.42
1.87
Lead (T)
5.84
2.86
0.53
0.26
1.65
Zinc (T)
8.37
3.19
0.76
0.29
1.98
(1) These concentrations shall be multiplied by the ratio
					 of (1,320/x) where x is the actual normalized process wastewater discharge flow
					 (in gallons per 1,000 pounds of metal poured) for a specific plant.
(2) kg/1,000 kkg (pounds per million pounds) of metal
					 poured.
TABLE 25
COPPER CASTING SUBCATEGORY
MELTING FURNACE SCRUBBER OPERATIONS
BAT Effluent Limitations
Noncontinuous Direct Dischargers
Maximum for any 1 day
Maximum for monthly average
Maximum for any 1 day
Maximum for monthly average
Annual average
Pollutant or pollutant property
kg/62.3 million Sm3
								  (pounds per billion SCF) of air scrubbed
mg/l(1)
mg/l(1)
(2)
Copper (T)
1.81
0.988
0.77
0.42
0.4
Lead (T)
1.25
0.612
0.53
0.26
0.353
Zinc (T)
1.79
0.673
0.76
0.29
0.424
Total phenols
2.02
0.706
0.86
0.3
0.471
(1) These concentrations shall be multiplied by the ratio
					 of (0.282/x) where x is the actual normalized process wastewater discharge flow
					 (in gallons per 1,000 SCF of air scrubbed) for a specific plant.
(2) kg/62.3 million Sm3 (pounds per billion SCF) of air
					 scrubbed. -
TABLE 26
COPPER CASTING SUBCATEGORY
MOLD COOLING OPERA TIONS
BAT Effluent Limitations
Noncontinuous Direct Dischargers
Maximum for any 1 day
Maximum for monthly average
Maximum for any 1 day
Maximum for monthly average
Annual average
Pollutant or pollutant property
kg/1,000 kkg (pounds per million pounds) of metal
								  poured
mg/l(1)
mg/l(1)
(2)
Copper (T)
0.392
0.214
0.77
0.42
0.0865
Lead (T)
0.27
0.132
0.53
0.26
0.0763
Zinc (T)
0.387
0.148
0.76
0.29
0.0916
(1) These concentrations shall be multiplied by the ratio
					 of (61/x) where x is the actual normalized process wastewater discharge flow
					 (in gallons per 1,000 pounds of metal poured) for a specific plant.
(2) kg/1,000 kkg (pounds per million pounds) of metal
					 poured.