Wis. Admin. Code Department of Natural Resources NR 256.33

Current through October 28, 2024

Section NR 256.33 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable

(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.

Wis. Admin. Code Department of Natural Resources NR 256.33

Cr. Register, June, 1989, No. 402, eff. 7-1-89.