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 256.43 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable

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 BAT effluent
					 limitations:
Table 75
ZINC 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)
0.0334
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
(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
Table 76
ZINC CASTING SUBCATEGORY DIE CASTING 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)
0.0066
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
(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.
Table 77
ZINC CASTING SUBCATEGORY MELTING FURNACE 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 Sm SCF) of air scrubbe
I3 (pounds per billion
								  d
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
(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. -
Table 78
ZINC CASTING SUBCATEGORY MOLD COOLING OPERATIONS
BAT Effluent Limitations
Noncontinuous Direct Dischargers
Maximum for any 1 day
Maximum for monthly average
Maximum for 1 day
any 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
(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.