Wis. Admin. Code Department of Natural Resources NR 256.32
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 BPT effluent limitations. Grinding scrubber operations may not discharge process wastewater pollutants to waters of the state.
TABLE 39
FERROUS CASTING SUBCATEGORY
CASTING CLEANING OPERATIONS
BPT 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) | 0.0353 | 0.0174 | 0.79 | 0.39 | 0.0098 |
Zinc (T) | 0.0656 | 0.025 | 1.47 | 0.56 | 0.0179 |
Oil & grease | 1.34 | 0.446 | 30 | 10 | 0.223 |
TSS | 1.7 | 0.67 | 38 | 15 | 0.446 |
pH | (3) | (3) | (3) | (3) | (3) |
(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.
(3) Within the range of 7.0 to 10.0 to all times.
TABLE 40
FERROUS CASTING SUBCATEGORY
CASTING QUENCH OPERATIONS
BPT 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) | 0.0376 | 0.0185 | 0.79 | 0.39 | 0.0105 |
Zinc (T) | 0.0699 | 0.0266 | 1.47 | 0.56 | 0.019 |
Oil & grease | 1.43 | 0.476 | 30 | 10 | 0.238 |
TSS | 1.81 | 0.713 | 38 | 15 | 0.476 |
pH | (3) | (3) | (3) | (3) | (3) |
(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.
(3) Within the range of 7.0 to 10.0 to all times.
TABLE 41
FERROUS CASTING SUBCATEGORY
DUST COLLECTION SCRUBBER OPERATIONS
BPT 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) | 0.593 | 0.293 | 0.79 | 0.39 | 0.165 |
Zinc (T) | 1.1 | 0.421 | 1.47 | 0.56 | 0.3 |
Total phenols | 0.656 | 0.225 | 0.86 | 0.3 | 0.15 |
Oil & grease | 22.5 | 7.51 | 30 | 10 | 3.76 |
TSS | 28.5 | 11.3 | 38 | 15 | 7.51 |
pH | (3) | (3) | (3) | (3) | (3) |
(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.
(3) Within the range of 7.0 to 10.0 at all times.
TABLE 42
FERROUS CASTING SUBCATEGORY
INVESTMENT CASTING
BPT 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) | 8.7 | 4.3 | 0.79 | 0.39 | 2.42 |
Zinc (T) | 16.2 | 6.17 | 1.47 | 0.56 | 4.41 |
Oil & grease | 330 | 110 | 30 | 10 | 55.1 |
TSS | 419 | 165 | 38 | 15 | 110 |
pH | (3) | (3) | (3) | (3) | (3) |
(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 Sm3 (pounds per billion SCF) of air scrubbed.
(4) Within the range of 7.0 to 10.0 at all times.
TABLE 43
FERROUS CASTING SUBCATEGORY
MELTING FURNACE SCRUBBER OPERATIONS (1)
BPT 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/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) | 2.77 | 1.37 | 0.79 | 0.39 | 0.771 |
Zinc (T) | 5.15 | 1.96 | 1.47 | 0.56 | 1.4 |
Total phenols | 3.01 | 1.05 | 0.86 | 0.3 | 0.701 |
Oil & grease | 105 | 35 | 30 | 10 | 17.5 |
TSS | 133 | 52.6 | 38 | 15 | 35 |
pH | (4) | (4) | (4) | (4) | (4) |
(1) In a multiple ferrous melting furnace scrubber configuration, each discrete wet scrubbing device with an associated wastewater dischar ge 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.
(4) Within the range of 7.0 to 10.0 at all times.
TABLE 44
FERROUS CASTING SUBCATEGORY
MOLD COOLING OPERATIONS
BPT 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) | 0.0428 | 0.0236 | 0.29 | 0.16 | 0.0096 |
Lead (T) | 0.117 | 0.0576 | 0.79 | 0.39 | 0.0325 |
Zinc (T) | 0.217 | 0.0827 | 1.47 | 0.56 | 0.0591 |
Oil & grease | 4.43 | 1.48 | 30 | 10 | 0.738 |
TSS | 5.61 | 2.22 | 38 | 15 | 1.48 |
pH | (3) | (3) | (3) | (3) | (3) |
(1) These concentrations shall be multiplied by the ratio of (17.7/x) where x is the actual normalized process wastewater dischar ge 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 45
FERROUS CASTING SUBCATEGORY
SLAG QUENCH OPERA TIONS
BPT 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) | 0.144 | 0.0709 | 0.79 | 0.39 | 0.04 |
Zinc (T) | 0.267 | 0.102 | 1.47 | 0.56 | 0.0728 |
Oil & grease | 5.46 | 1.82 | 30 | 10 | 0.909 |
TSS | 6.91 | 2.73 | 38 | 15 | 1.82 |
pH | (3) | (3) | (3) | (3) | (3) |
(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.
(3) Within the range of 7.0 to 10.0 at all times.
TABLE 46
FERROUS CASTING SUBCATEGORY
WET SAND RECLAMATION OPERATIONS
BPT 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 sand reclaimed | mg/l(1) | mg/l(1) | (2) | |
Copper (T) | 0.217 | 0.12 | 0.29 | 0.16 | 0.0485 |
Lead (T) | 0.59 | 0.291 | 0.79 | 0.39 | 0.164 |
Zinc (T) | 1.1 | 0.418 | 1.47 | 0.56 | 0.299 |
Total phenols | 0.642 | 0.224 | 0.86 | 0.3 | 0.149 |
Oil & grease | 22.4 | 7.47 | 30 | 10 | 3.73 |
TSS | 28.4 | 11.2 | 38 | 15 | 7.47 |
pH | (3) | (3) | (3) | (3) | (3) |
(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.
(3) Within the range of 7.0 to 10.0 at all times.
Wis. Admin. Code Department of Natural Resources NR 256.32