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 256.35 - Pretreatment standard for existing sources

Current through June 24, 2024
Except as provided in ss.
					 NR
					 211.13 and
					 211.14, any existing source subject to
					 this subchapter which introduces pollutants into a publicly owned treatment
					 works shall comply with ch. NR 211 and achieve the following pretreatment
					 standards for existing sources. Grinding scrubber operations may not discharge
					 process wastewater pollutants to a POTW.
Table 63
FERROUS CASTING SUBCATEGORY CASTING CLEANING
					 OPERATIONS
PSES
Maximum for any 1
day 
								  (1)
Maximum for monthly average 
								  (1)
Maximum for any 1
day 
								  (2)
Maximum for monthly average 
								  (2)
Pollutant or pollutant property
kg/1,000 kkg (pounds per million pounds) of metal
								  poured
Copper (T)
0.0129
0.0071
0.0129
0.0071
Lead (T)
0.0237
0.0116
0.0353
0.0174
Zinc (T)
0.0437
0.0165
0.0656
0.025
(1) Applies to plants which cast primarily ductile iron,
					 primarily malleable iron where metal poured is greater than 3,557 tons per
					 year, or primarily gray iron where metal poured is greater than 1.784 tons per
					 year.
(2) Applies to plants which cast primarily steel, primarily
					 malleable iron where metal poured is equal to or less than 3,557 tons per year,
					 or primarily gray iron where metal poured is equal to or less than 1,784 tons
					 per year.
Table 64
FERROUS CASTING SUBCATEGORY CASTING QUENCH
					 OPERATIONS
PSES
Maximum for any 1 day 
								  (1)
Maximum for monthly average 
								  (1)
Maximum for any 1 day 
								  (2)
Maximum for monthly average 
								  (2)
Pollutant or pollutant property
kg/1,000 kkg (pounds per million pounds) of metal
								  poured
Copper (T)
0.0138
0.0076
0.0138
0.0076
Lead (T)
0.0252
0.0124
0.0376
0.0185
Zinc (T)
0.0466
0.0176
0.0699
0.0266
TTO(3)
0.0257
0.00838
0.0257
0.00838
Oil and
								  grease(4)
1.43
0.476
1.43
0.476
(1) Applies to plants which cast primarily ductile iron,
					 primarily malleable iron where metal poured is greater than 3,557 tons per
					 year, or primarily gray iron where metal poured is greater than 1.784 tons per
					 year.
(2) Applies to plants which cast primarily steel, primarily
					 malleable iron where metal poured is equal to or less than 3,557 tons per year,
					 or primarily gray iron where metal poured is equal to or less than 1,784 tons
					 per year.
(3) TTO is comprised of the following toxic organic
					 pollutants
chloroform (trichloromethane)
2,4-dimethylphenol
(4) Use as alternative to monitoring for TTO.
Table 65
FERROUS CASTING SUBCATEGORY DUST COLLECTION SCRUBBER
					 OPERATIONS
PSES
Maximum for any 1
day 
								  (1)
Maximum for monthly average 
								  (1)
Maximum for any 1
day 
								  (2)
Maximum for monthly average 
								  (2)
Pollutant or pollutant property
kg/62.3 million Sm3
								  (pounds per billion SCF) of air scrubbed
Copper (T)
0.218
0.12
0.218
0.12
Lead (T)
0.398
0.195
0.593
0.293
Zinc (T)
0.736
0.278
1.1
0.421
Total phenols
0.646
0.225
0.656
0.225
TTO(4)
2.04
0.664
2.04
0.664
Oil and
								  grease(5)
22.5
7.51
22.5
7.51
(1) Applies to plants which cast primarily ductile iron,
					 primarily malleable iron where metal poured is greater than 3,557 tons per
					 year, or primarily gray iron where metal poured is greater than 1.784 tons per
					 year.
(2) Applies to plants which cast primarily steel, primarily
					 malleable iron where metal poured is equal to or less than 3,557 tons per year,
					 or primarily gray iron where metal poured is equal to or less than 1,784 tons
					 per year.
(3) TTO is comprised of the following toxic organic
					 pollutants
acenaphthene
chloroform (trichloromethane)
2,4-dichlorophenol
2,4-dimethylphenol
fluoranthene
methylene chloride (dichloromethane)
naphthalene
pentachlorophenol
phenol
bis (2-ethylhexyl) phthalate
butyl benzyl phthalate
di-n-butyl phthalate
diethyl phthalate
benzo (a)anthracene (1,2-benzanthracene)
chrysene
acenaphthylene
anthracene
flourene
phenanthrene
pyrene
(4) Use as alternative to monitoring for TTO.
Table 66
FERROUS CASTING SUBCATEGORY INVESTMENT CASTING
PSES
Maximum for any 1
day 
								  (1)
Maximum for monthly average 
								  (1)
Maximum for any 1
day 
								  (2)
Maximum for monthly average 
								  (2)
Pollutant or pollutant property
kg/1,000 kkg (pounds per million pounds) of metal
								  poured
Copper (T)
3.19
1.76
3.19
1.76
Lead (T)
5.84
2.86
8.7
4.3
Zinc (T)
10.8
4.07
16.2
6.17
TTO(3)
13.2
4.3
13.2
4.3
Oil and
								  grease(4)
330
110
330
110
(1) Applies to plants which cast primarily ductile iron,
					 primarily malleable iron where metal poured is greater than 3,557 tons per
					 year, or primarily gray iron where metal poured is greater than 1.784 tons per
					 year.
(2) Applies to plants which cast primarily steel, primarily
					 malleable iron where metal poured is equal to or less than 3,557 tons per year,
					 or primarily gray iron where metal poured is equal to or less than 1,784 tons
					 per year.
(3) TTO is comprised of the following toxic organic
					 pollutants:
chloroform (trichloromethane)
methylene chloride (dichloromethane)
bis (2-ethylhexyl) phthalate
acenaphthylene
pyrene
(4) Use as alternative to monitoring for TTO.
Table 67
FERROUS CASTING SUBCATEGORY MELTING FURNACE SCRUBBER
					 OPERATIONS(1)
PSES
Maximum for any 1
day 
								  (1)
Maximum for monthly average 
								  (1)
Maximum for any 1
day 
								  (2)
Maximum for monthly average 
								  (2)
Pollutant or pollutant property
kg/62.3 million Sm3
								  (pounds per billion SCF) of air scrubbed
Copper (T)
1.02
0.561
1.02
0.561
Lead (T)
1.86
0.911
2.77
1.37
Zinc (T)
3.44
1.30
5.15
1.96
Total phenols
3.01
1.05
3.01
1.05
TTO(4)
8.34
2.73
8.34
2.73
Oil and
								  grease(5)
105
35
105
35
(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) Applies to plants which cast primarily ductile iron,
					 primarily malleable iron where metal poured is greater than 3,557 tons per
					 year, or primarily gray iron where metal poured is greater than 1,784 tons per
					 year.
(3) Applies to plants which cast primarily steel, primarily
					 malleable iron where metal poured is equal to or less than 3,557 tons per year,
					 or primarily gray iron where metal poured is equal to or less than 1,784 tons
					 per year.
(3) TTO is comprised of the following toxic organic
					 pollutants:
chloroform (trichloromethane)
2,4-dichlorophenol
2,4-dimethylphenol
fluoranthene
methylene chloride (dichloromethane)
naphthalene
phenol
bis (2-ethylhexyl) phthalate
butyl benzyl phthalate
di-n-butyl phthalalte
benzo (a)anthracene (1,2-benzanthracene)
chrysene
acenaphthylene
anthracene
fluorene
phenanthrene
pyrene
(4) Use as alternative to monitoring for TTO.
Table 68
FERROUS CASTING SUBCATEGORY MOLD COOLING OPERATIONS
PSES
Maximum for any 1
day 
								  (1)
Maximum for monthly average 
								  (1)
Maximum for any 1
day 
								  (2)
Maximum for monthly average 
								  (2)
Pollutant or pollutant property
kg/1,000 kkg (pounds per million pounds) of metal
								  poured
Copper (T)
0.0428
0.0236
0.0428
0.0236
Lead (T)
0.0783
0.0384
0.117
0.0576
Zinc (T)
0.145
0.0546
0.217
0.0827
TTO(3)
0.0797
0.026
0.0797
0.026
Oil and
								  grease(4)
4.43
1.48
4.43
1.48
(1) Applies to plants which cast primarily ductile iron,
					 primarily malleable iron where metal poured is greater than 3,557 tons per
					 year, or primarily gray iron where metal poured is greater than 1,784 tons per
					 year.
(2) Applies to plants which cast primarily steel, primarily
					 malleable iron where metal poured is equal to or less than 3,557 tons per year,
					 or primarily gray iron where metal poured is equal to or less than 1,784 tons
					 per year.
(3) TTO is comprised of the following toxic organic
					 pollutants:
chloroform (trichloromethane)
2,4-dimethylphenol
(4) Use as alternative to monitoring for TTO.
Table 69
FERROUS CASTING SUBCATEGORY SLAG QUENCH OPERATIONS
PSES
Maximum for any 1
day 
								  (1)
Maximum for monthly average 
								  (1)
Maximum for any 1
day 
								  (2)
Maximum for monthly average 
								  (2)
Pollutant or pollutant property
kg/1,000 kkg (pounds per million pounds) of metal
								  poured
Copper (T)
0.0527
0.0291
0.0527
0.0291
Lead (T)
0.0964
0.0473
0.144
0.0709
Zinc (T)
0.178
0.0673
0.267
0.102
TTO(3)
0.0257
0.00838
0.0257
0.00838
Oil and
								  grease(4)
5.46
1.82
5.46
1.82
(1) Applies to plants which cast primarily ductile iron,
					 primarily malleable iron where metal poured is greater than 3,557 tons per
					 year, or primarily gray iron where metal poured is greater than 1,784 tons per
					 year.
(2) Applies to plants which cast primarily steel, primarily
					 malleable iron where metal poured is equal to or less than 3,557 tons per year,
					 or primarily gray iron where metal poured is equal to or less than 1,784 tons
					 per year.
(3) TTO is comprised of the following toxic organic
					 pollutants:
2,4-dimethylphenol
dimethyl phthalate
(4) Use as alternative to monitoring for TTO.
Table 70
FERROUS CASTING SUBCATEGORY WET SAND RECLAMATION
					 OPERATIONS
PSES
Maximum for any 1
day 
								  (1)
Maximum for monthly average 
								  (1)
Maximum for any 1
day 
								  (2)
Maximum for monthly average 
								  (2)
Pollutant or pollutant property
kg/1,000 kkg (pounds per million pounds) of sand
								  reclaimed
Copper (T)
0.217
0.12
0.217
0.12
Lead (T)
0.396
0.194
0.59
0.291
Zinc (T)
0.732
0.276
1.1
0.418
Total phenols
0.642
0.224
0.642
0.224
TTO(3)
1.18
0.386
1.18
0.386
Oil and
								  grease(4)
22.4
7.47
22.4
7.47
(1) Applies to plants which cast primarily ductile iron,
					 primarily malleable iron where metal poured is greater than 3,557 tons per
					 year, or primarily gray iron where metal poured is greater than 1,784 tons per
					 year.
(2) Applies to plants which cast primarily steel, primarily
					 malleable iron where metal poured is equal to or less than 3,557 tons per year,
					 or primarily gray iron where metal poured is equal to or less than 1,784 tons
					 per year.
(3) TTO is comprised of the following toxic organic
					 pollutants:
acenaphthene
2,4-dimethylphenol
fluoranthene
methylene chloride (dichloromethane)
naphtalene
phenol
bis (2-ethylhexyl) phthalate
di-n-butyl phthalate
diethyl phthalate
dimethyl phthalate
benzo(a)anthracene (1,2-benzanthracene)
acenaphthylene
pyrene
(4) Use as alternative to monitoring for
					 TTO.