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 III - Ferrous Casting Subcategory
Section NR 256.33 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable
Current through August 26, 2024
(1) Any plant, including noncontinuous direct dischargers, which casts primarily malleable iron where metal poured is equal to or less than 3,557 tons per year or casts primarily steel, shall achieve the copper, lead, zinc, and total phenols effluent limitations contained in s. NR 256.32. Grinding scrubber operations may not discharge process wastewater pollutants to waters of the state.
(2) Except as provided in 40 CFR 125.30 to 125.32, any plant, including noncontinuous direct dischargers, which casts primarily malleable iron where metal poured is greater than 3,557 tons per year or casts primarily ductile or gray iron shall achieve the following BAT effluent limitations. Grinding scrubber operations may not discharge process wastewater pollutants to waters of the state.
TABLE 47
FERROUS CASTING SUBCATEGORY
CASTING CLEANING 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) |
0.0129 |
0.0071 |
0.29 |
0.16 |
0.0029 |
|
Lead (T) |
0.0237 |
0.0116 |
0.53 |
0.26 |
0.0067 |
|
Zinc (T) |
0.0437 |
0.0165 |
0.98 |
0.37 |
0.0116 |
(1) These concentrations shall be multiplied by the ratio of (5.33/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 48
FERROUS 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) |
0.0138 |
0.0076 |
0.29 |
0.16 |
0.0031 |
|
Lead (T) |
0.0252 |
0.0124 |
0.53 |
0.26 |
0.0071 |
|
Zinc (T) |
0.0466 |
0.0176 |
0.98 |
0.37 |
0.0124 |
(1) These concentrations shall be multiplied by the ratio of (5.7/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 49
FERROUS 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) |
0.218 |
0.12 |
0.29 |
0.16 |
0.0488 |
|
Lead (T) |
0.398 |
0.195 |
0.53 |
0.26 |
0.113 |
|
Zinc (T) |
0.736 |
0.278 |
0.98 |
0.37 |
0.195 |
|
Total phenols |
0.646 |
0.225 |
0.86 |
0.3 |
0.15 |
(1) These concentrations shall be multiplied by the ratio of (0.09/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 50
FERROUS 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) |
3.19 |
1.76 |
0.29 |
0.16 |
0.716 |
|
Lead (T) |
5.84 |
2.86 |
0.53 |
0.26 |
1.65 |
|
Zinc (T) |
10.8 |
4.07 |
0.98 |
0.37 |
2.86 |
(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 51
FERROUS CASTING SUBCATEGORY
MELTING FURNACE SCRUBBER OPERATIONS (1)
|
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) |
1.02 |
0.561 |
0.29 |
0.16 |
0.228 |
|
Lead (T) |
1.86 |
0.911 |
0.53 |
0.26 |
0.526 |
|
Zinc (T) |
3.44 |
1.3 |
0.98 |
0.37 |
0.911 |
|
Total phenols |
3.01 |
1.05 |
0.86 |
0.3 |
0.701 |
(1) In a multiple ferrous melting furnace scrubber configuration, each discrete wet scrubbing device with an associated wastewater discharge shall be given the mass allowance specified. The allowance will be identical for each device and based on the airflow of the exhaust gas stream that passes through the multiple scrubber configuration.
(2) These concentrations shall be multiplied by the ratio of (0.42/x) where x is the actual normalized process wastewater discharge flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.
(3) kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed
TABLE 52
FERROUS CASTING SUBCATEGORY
MOLD COOLING 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) |
0.0428 |
0.0236 |
0.29 |
0.16 |
0.0096 |
|
Lead (T) |
0.0783 |
0.0384 |
0.53 |
0.26 |
0.0222 |
|
Zinc (T) |
0.0145 |
0.0546 |
0.98 |
0.37 |
0.0384 |
(1) These concentrations shall be multiplied by the ratio of (17.7/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 53
FERROUS CASTING SUBCATEGORY
SLAG 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) |
0.0527 |
0.0291 |
0.29 |
0.16 |
0.0118 |
|
Lead (T) |
0.0964 |
0.0473 |
0.53 |
0.26 |
0.0273 |
|
Zinc (T) |
0.178 |
0.0673 |
0.98 |
0.37 |
0.0473 |
(1)These concentrations shall be multiplied by the ratio of (21.8/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 54
FERROUS CASTING SUBCATEGORY
WET SAND RECLAMA TION 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 sand reclaimed |
mg/l(1) |
mg/l(1) |
(2) |
|
|
Copper (T) |
0.217 |
0.12 |
0.29 |
0.16 |
0.0485 |
|
Lead (T) |
0.396 |
0.194 |
0.53 |
0.26 |
0.112 |
|
Zinc (T) |
0.732 |
0.276 |
0.98 |
0.37 |
0.194 |
|
Total phenols |
0.642 |
0.224 |
0.86 |
0.3 |
0.149 |
(1) These concentrations shall be multiplied by the ratio of (89.5/x) where x is the actual normalized process wastewater discharge flow (in gallons per 1,000 pounds of sand reclaimed) for a specific plant.
(2) kg/1,000 kkg (pounds per million pounds) of sand reclaimed.
