(2) Applicable to plants that are casting primarily steel, to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year, and to plants that are casting primarily gray iron where equal to or less than 1,784 tons of metal are poured per year.

Copper (T)
Lead (T)
Zinc (T)
TTO
Oil and Grease (for alternate

PSNS

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly aver

age

$ 464.37 Effluent limitations guidelines

representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology. [Reserved)

Subpart D-Zinc Casting

Subcategory $ 464.40 Applicability; description of

the zinc casting subcategory. The provisions of this subpart are applicable to discharges to waters of the United States and to the introduction of pollutants into publicly owned treatment works resulting from zinc casting operations as defined in $ 464.02(d). § 464.41 Specialized definitions.

For the purpose of this subpart:

(a) Total Toxic Organics (TTO). TTO is a regulated parameter under PSES (8 464.45) and PSNS (8 464.46) for the zinc subcategory and is comprised of a discrete list of toxic organic pollutants for each process segment where it is regulated, as follows:

(1) Casting Quench (§ 464.45(a) and § 464.46(a)): 21. 2,4,6-trichlorophenol 22. para-chloro meta-cresol 31. 2,4-dichlorophenol 34. 2,4-dimethylphenol 39. fluoranthene 44. methylene chloride (dichloromethane) 65. phenol 66. bis(2-ethylhexyl) phthalate 68. di-n-butyl phthalate 70. diethyl phthalate 85. tetrachloroethylene

(2) Die Casting (8 465.45(b) and $ 464.46(b)): 1. acenaphthene 21. 2,4,6-trichlorophenol 22. para-chloro meta-cresol 24. 2-chlorophenol 34. 2,4-dimethylphenol 44. methylene chloride (dichloromethane) 55. naphthalene 65. phenol 66. bis (2-ethylhexyl) phthalate 68. di-n-butyl phthalate 70. diethyl phthalate 85. tetrachloroethylene 86. toluene 87. trichloroethylene

(3) Melting Furnace Scrubber (8 464.45(c) and $ 464.46(c)): 31. 2,4-dichlorophenol 34. 2,4-dimethylphenol 39. fluoranthene

22.4

7.47

Copper (T) Lead (T) Zinc (T) Total phenols TTO Oil and grease (for alter

44. methylene chloride (dichloromethane)
55. naphthalene
65. phenol
66. bis(2-ethylhexyl) phthalate
68. di-n-butyl phthalate
85. tetrachloroethylene
86. toluene
87. trichloroethylene
(4) Mold Cooling (8 464.45(d)

and $ 464.46(d)): 21. 2,4,6-trichlorophenol 22. para-chloro meta-cresol 31. 2,4-dichlorophenol 34. 2,4-dimethylphenol 39. fluoranthene 44. methylene chloride (dichloromethane) 65. phenol 66. bis(2-ethylhexyl) phthalate 68. di-n-butyl phthalate 70. diethyl phthalate 85. tetrachloroethylene (50 FR 45247, Oct. 30, 1985; 51 FR 21762, June 16, 1986)

(mg/1)2 (mg/1)2 Copper (T)

0.77

0.42 0.0076 Lead (T)

0.79

0.39 0.0098 Zinc (T)

1.14

0.43

0.0121 Oil and grease

30

10

0.223 TSS

38

15

0.446 pH

(3)

(3) 1 kg/1000 kkg (pound per million pounds) of metal poured.

2 These concentrations must be multiplied by the ratio of (5.35/x) where x is the actual normalized process wastewater flow in gallons per 1,000 pounds of metal poured) for a spe cific plant. 3 Within the range of 7.0 to 10.0 at all times. (b) Die Casting Operations.

8 464.42 Effluent limitations guidelines

representing the degree of effluent reduction attainable by the application of the best practicable control

technology currently available. Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available, except that non-continuous dischargers shall not be subject to the maximum day and maximum for monthly average mass (kg/1,000 kkg or lb/million lb of metal poured; kg/62.3 million Sm3 or lb/ billion SCF of air scrubbed) effluent limitations for copper, lead, zinc, total phenols, oil and grease, and TSS. For non-continuous dischargers, annual average mass limitations and maximum day and maximum for monthly average concentration (mg/l) limitations shall apply. Concentration limitations and annual average mass limitations shall only apply to noncontinuous dischargers.

(a) Casting Quench Operations.

2 These concentrations must be multiplied by the ratio of (1.04/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant. Within the range of 7.0 to 10.0 at all times.

(c) Melting Furnace Scrubber Operations.

12

BPT EFFLUENT LIMITATIONS

(mg/

(mg/

1)2 Copper (T)

0.77

0.42 0.067 Lead (T)

0.79

0.39 0.0867 Zinc (T)

1.14

0.43 0.106 Oil and grease

30

10

1.97 TSS

38

15

3.94 pH

(3)

(>) (3) 1 kg/1,000 kkg (pounds per million pounds) of metal poured.

2 These concentrations must be multiplied by the ratio of (47.3/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

3 Within the range of 7.0 to 10.0 at all times.

(50 FR 45247, Oct. 30, 1985; 51 FR 21762, June 16, 1986]

$ 464.43 Effluent limitations guidelines

representing the degree of effluent reduction attainable

by the application of the best available tech

nology economically achievable. Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable, except that non-continuous dischargers shall not be subject to the maximum day and maximum for monthly average mass (kg/1,000 kkg or lb/million lb of metal poured; kg/62.3 million Sm3 or lb/billion SCF of air scrubbed) effluent limitations for copper, lead, zinc, and total phenols. For non-continuous dischargers, annual average mass limitations and maximum day and maximum for monthly average concentration (mg/l) limitations shall apply. Concentration limitations and annual average mass limitations shall only apply to non-continuous dischargers.

(a) Casting Quench Operations.

PH

kg/1.000 kkg (pounds per mil

lion pounds) of metal poured

TSS PH

Copper (T) Lead (T) Zinc (T)

Within the range of 7.0 to 10.0 at all times.

(mg/

(mg/ 1)2

12 Copper (T)

0.77

0.42 0.0015 Lead (T)

0.53

0.26 0.0013 Zinc (T)

0.76

0.29 0.0016 Total phenols

0.86

0.3

0.0017 kg/1,000 kkg (pounds per million pounds) of metal poured.

2 These concentrations must be multiplied by the ratio of (1.04/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant

(c) Melting Furnace Scrubber Operations.

[50 FR 45247, Oct. 30, 1985; 51 FR 21762, June 16, 1986]

$ 464.44 New source performance

standards. Any new source subject to this subpart must achieve the following new source performance standards (NSPS), except that non-continuous dischargers shall not be subject to the maximum day and maximum for monthly average mass (kg/1,000 kkg or lb/million lb of metal poured; kg/62.3 million Sm3 or lb/ billion SCF of air scrubbed) effluent standards for copper, lead, zinc, total phenols, oil and grease, and TSS. For non-continuous dischargers, annual average mass standards and maximum day and maximum for monthly average concentration (mg/l) standards shall apply. Concentration standards and annual average mass standards shall only apply to non-continuous dischargers.

(a) Casting Quench Operations.