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 256.22 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available

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 BPT effluent limitations.
					 Grinding scrubber operations may not discharge process wastewater pollutants to
					 waters of the state.
TABLE 15
COPPER CASTING SUBCATEGORY
CASTING QUENCH OPERATIONS
BPT 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)
0.0315
0.0156
0.79
0.39
0.0066
Zinc (T)
0.0455
0.0171
1.14
0.43
0.0108
Oil & grease
1.2
0.399
30
10
0.199
TSS
1.52
0.598
38
15
0.399
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 16
COPPER CASTING SUBCATEGORY
DIRECT CHILL CASTING OPERA TIONS
BPT 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)
0.952
0.47
0.79
0.39
0.265
Zinc (T)
1.37
0.518
1.14
0.43
0.326
Oil & grease
36.2
12.1
30
10
6.03
TSS
45.8
18.1
38
15
12.1
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 17
COPPER CASTING SUBCATEGORY
DUST COLLECTION SCRUBBER OPERATIONS
BPT 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)
0.567
0.28
0.79
0.39
0.158
Zinc (T)
0.818
0.309
1.14
0.43
0.194
Total phenols
0.617
0.215
0.86
0.3
0.144
Oil & grease
21.5
7.18
30
10
3.59
TSS
27.3
10.8
38
15
7.18
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 at all times.
TABLE 18
COPPER CASTING SUBCATEGORY
INVESTMENT CASTING
BPT Effluent Limitations
Noncontinuous Direct Dischargers
Maximum for any 1 day
Maximum for monthly average
Maximum for 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)
8.7
4.3
0.79
0.39
2.42
Zinc (T)
12.6
4.74
1.14
0.43
2.97
Oil & grease
330
110
30
10
55.1
TSS
419
165
38
15
110
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 19
COPPER CASTING SUBCATEGORY
MELTING FURNACE SCRUBBER OPERATIONS
BPT 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)
1.86
0.918
0.79
0.39
0.158
Zinc (T)
2.68
1.01
1.14
0.43
0.635
Total phenols
2.02
0.706
0.86
0.3
0.467
Oil & grease
70.6
23.5
30
10
11.8
TSS
89.4
35.3
38
15
23.5
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 20
COPPER CASTING SUBCATEGORY
MOLD COOLING OPERATIONS
BPT 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)
0.402
0.199
0.79
0.39
0.112
Zinc (T)
0.58
0.219
1.14
0.43
0.137
Oil & grease
15.3
5.09
30
10
2.54
TSS
19.3
7.63
38
15
5.09
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.