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 June 24, 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.