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
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