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 256.24 - New source performance standards

Current through June 24, 2024
Any new source subject to this subchapter, including
					 noncontinuous direct dischargers, shall achieve the following standards.
					 Grinding scrubber operations may not discharge process wastewater pollutants to
					 waters of the state.
TABLE 27
COPPER CASTING SUBCATEGORY
CASTING QUENCH OPERATIONS
NSPS
Noncontinuous Direct Dischargers
Maximum for any 1 day
Maximum for monthly average
Maximum for 1 day
any 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
Oil & grease
1.2
0.399
30
10
0.199
TSS
0.598
0.479
15
12
0.104
pH
(3)
(3)
(3)
(3)
(3)
(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.
(3) Within the range of 7.0 to 10.0 to all times.
TABLE 28
COPPER CASTING SUBCATEGORY
DIRECT CHILL CASTING OPERATIONS
NSPS
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
Oil & grease
36.2
12.1
30
10
6.03
TSS
18.1
14.5
15
12
3.13
pH
(3)
(3)
(3)
(3)
(3)
(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.
(3) Within the range of 7.0 to 10.0 to all times.
TABLE 29
COPPER CASTING SUBCATEGORY
DUST COLLECTION SCRUBBER OPERATIONS
NSPS
Noncontinuous Direct Dischargers
Maximum for any 1 day
Maximum for monthly average
Maximum for 1 day
any 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
Oil & grease
21.5
7.18
30
10
3.59
TSS
10.8
8.61
15
12
1.87
pH
(3)
(3)
(3)
(3)
(3)
(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.
(3) Within the range of 7.0 to 10.0 to all times.
TABLE 30
COPPER CASTING SUBCATEGORY
INVESTMENT CASTING
NSPS
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
Oil & grease
330
110
30
10
55.1
TSS
165
132
15
12
28.6
pH
(3)
(3)
(3)
(3)
(3)
(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.
(3) Within the range of 7.0 to 10.0 to all times.
TABLE 31
COPPER CASTING SUBCATEGORY
MELTING FURNACE SCRUBBER OPERATIONS
NSPS
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
Oil & grease
70.6
23.5
30
10
11.8
TSS
35.3
28.2
15
12
6.12
pH
(3)
(3)
(3)
(3)
(3)
(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.
(3) Within the range of 7.0 to 10.0 to all times.
TABLE 32
COPPER CASTING SUBCATEGORY
MOLD COOLING OPERATIONS
NSPS
Noncontinuous Direct Dischargers
Maximum for any
Maximum for
Maximum for any
Maximum for
1 day
monthly average
1 day
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
Oil & grease
15.3
5.09
30
10
2.54
TSS
7.63
6.11
15
12
1.32
pH
(3)
(3)
(3)
(3)
(3)
(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.
(3) Within the range of 7.0 to 10.0 to all
					 times.