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 IV - Zinc Casting Subcategory › Section NR 256.44 - 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:
Table 79
ZINC CASTING SUBCATEGORY CASTING QUENCH 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)
0.0344
0.0187
0.77
0.42
0.0076
Lead (T)
0.0237
0.0116
0.53
0.26
0.0067
Zinc (T)
0.0339
0.0129
0.76
0.29
0.008
Oil & grease
1.34
0.446
30
10
0.223
TSS
0.67
0.536
15
12
0.116
pH
(3)
(3)
(3)
(3)
(3)
(1) These concentrations shall be multiplied by the ratio
					 of (5.34/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 at all times
Table 80
ZINC CASTING SUBCATEGORY DIE 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)
0.0066
0.0036
0.77
0.42
0.0015
Lead (T)
0.0046
0.0022
0.53
0.26
0.0013
Zinc (T)
0.0066
0.0025
0.76
0.29
0.0016
Total phenols
0.0074
0.0026
0.86
0.3
0.0017
Oil & grease
0.259
0.0864
30
10
0.0432
TSS
0.13
0.104
15
12
0.0225
pH
(3)
(3)
(3)
(3)
(3)
(1) These concentrations shall be multiplied by the ratio
					 of (1.04/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 at all times
Table 81
ZINC 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)
1.56
0.852
0.77
0.42
0.345
Lead (T)
1.07
0.527
0.53
0.26
0.304
Zinc (T)
1.54
0.588
0.76
0.29
0.365
Total phenols
1.74
0.608
0.86
0.3
0.406
Oil & grease
60.8
20.3
30
10
10.1
TSS
30.4
24.3
15
12
5.27
pH
(3)
(3)
(3)
(3)
(3)
(1) These concentrations shall be multiplied by the ratio
					 of (0.243/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 82
ZINC CASTING SUBCATEGORY MOLD COOLING 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)
0.304
0.166
0.77
0.42
0.067
Lead (T)
0.209
0.103
0.53
0.26
0.0591
Zinc (T)
0.3
0.114
0.76
0.29
0.071
Oil & grease
11.8
3.94
30
10
1.97
TSS
5.91
4.73
15
12
1.03
pH
(3)
(3)
(3)
(3)
(3)
(1) These concentrations shall be multiplied by the ratio
					 of (47.3/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 at all
					 times