Wis. Admin. Code Department of Natural Resources NR 256.44

Current through November 25, 2024

Section NR 256.44 - New source performance standards

Any new source subject to this subchapter, including noncontinuous direct dischargers, shall achieve the following standards:

Table 79

ZINC CASTING SUBCATEGORY CASTING QUENCH OPERATIONS

NSPS
			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)	0.0344	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
Oil & grease	1.34	0.446	30	10	0.223
TSS	0.67	0.536	15	12	0.116
pH	(3)	(3)	(3)	(3)	(3)

(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

(3) Within the range of 7.0 to 10.0 at all times

Table 80

ZINC CASTING SUBCATEGORY DIE CASTING OPERATIONS

NSPS
			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
Oil & grease	0.259	0.0864	30	10	0.0432
TSS	0.13	0.104	15	12	0.0225
pH	(3)	(3)	(3)	(3)	(3)

(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

(3) Within the range of 7.0 to 10.0 at all times

Table 81

ZINC CASTING SUBCATEGORY MELTING FURNACE SCRUBBER OPERATIONS

NSPS
			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)	1.56	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
Oil & grease	60.8	20.3	30	10	10.1
TSS	30.4	24.3	15	12	5.27
pH	(3)	(3)	(3)	(3)	(3)

(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

(3) Within the range of 7.0 to 10.0 at all times

Table 82

ZINC CASTING SUBCATEGORY MOLD COOLING OPERATIONS

NSPS
			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)	0.304	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
Oil & grease	11.8	3.94	30	10	1.97
TSS	5.91	4.73	15	12	1.03
pH	(3)	(3)	(3)	(3)	(3)

(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

(3) Within the range of 7.0 to 10.0 at all times

Wis. Admin. Code Department of Natural Resources NR 256.44

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