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National
United States Regulations
40 CFR PART 464—METAL MOLDING AND CASTING POINT SOURCE CATEGORY
PART 464—METAL MOLDING AND CASTING POINT SOURCE CATEGORY
Authority: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307, 308, and 501 of the Clean Water Act (Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) (the “Act”); 33 U.S.C. 1311, 1314 (b), (c), (e) and (g), 1316 (b) and (c), 1317 (b) and (c), 1318, and 1361; 86 Stat. 816, Pub. L. 92–500; 91 Stat. 1567, Pub. L. 95–217.
Source: 50 FR 45247, Oct. 30, 1985, unless otherwise noted.
General Provisions
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§ 464.01 Applicability.
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(a) This part applies to metal molding and casting facilities that discharge or may discharge pollutants to waters of the United States or that introduce pollutants into a publicly owned treatment works.
§ 464.02 General definitions.
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In addition to the definitions set forth in 40 CFR part 401, the following definitions apply to this part:
(a) Aluminum casting. The remelting of aluminum or an aluminum alloy to form a cast intermediate or final product by pouring or forcing the molten metal into a mold, except for ingots, pigs, or other cast shapes related to nonferrous (primary and secondary) metals manufacturing (40 CFR part 421) and aluminum forming (40 CFR part 467). Processing operations following the cooling of castings not covered under aluminum forming, except for grinding scrubber operations which are covered here, are covered under the electroplating and metal finishing point source categories (40 CFR parts 413 and 433).
(b) Copper casting. The remelting of copper or a copper alloy to form a cast intermediate or final product by pouring or forcing the molten metal into a mold, except for ingots, pigs, or other cast shapes related to nonferrous (primary and secondary) metals manufacturing (40 CFR part 421). Also excluded are casting of beryllium alloys in which beryllium is present at 0.1 or greater percent by weight and precious metals alloys in which the precious metal is present at 30 or greater percent by weight. Except for grinding scrubber operations which are covered here, processing operations following the cooling of castings are covered under the electroplating and metal finishing point source categories (40 CFR parts 413 and 433).
(c) Ferrous casting. The remelting of ferrous metals to form a cast intermediate or finished product by pouring the molten metal into a mold. Except for grinding scrubber operations which are covered here, processing operations following the cooling of castings are covered under the electroplating and metal finishing point source categories (40 CFR parts 413 and 433).
(d) Zinc casting. The remelting of zinc or zinc alloy to form a cast intermediate or final product by pouring or forcing the molten metal into a mold, except for ingots, pigs, or other cast shapes related to nonferrous (primary) metals manufacturing (40 CFR part 421) and nonferrous metals forming (40 CFR part 471). Processing operations following the cooling of castings not covered under nonferrous metals forming are covered under the electroplating and metal finishing point source categories (40 CFR parts 413 and 433).
(e) POTW shall mean “publicly owned treatment works.”
(f) A non-continuous discharger is a plant which does not discharge pollutants during specific periods of time for reasons other than treatment plant upset, such periods being at least 24 hours in duration. A typical example of a non-continuous discharger is a plant where wastewaters are routinely stored for periods in excess of 24 hours to be treated on a batch basis. For non-continuous discharging direct discharging plants, NPDES permit authorities shall apply the mass-based annual average effluent limitations or standards and the concentration-based maximum day and maximum for monthly average effluent limitations or standards established in the regulations. POTWs may elect to establish concentration-based standards for non-continuous discharges to POTWs. They may do so by establishing concentration-based pretreatment standards equivalent to the mass-based standards provided in §§464.15, 464.16, 464.25, 464.26, 464.35, 464.36, 464.45, and 464.46 of the regulations. Equivalent concentration standards may be established by following the procedures outlined in §464.03(b).
(g) Total phenols shall mean total phenolic compounds as measured by the procedure listed in 40 CFR part 136 (distillation followed by colorimetric—4AAP).
(h) Sm 3 shall mean standard cubic meters.
(i) SCF shall means standard cubic feet.
(j) Total toxic organics (TTO) shall mean the sum of the mass of each of the toxic organic compounds which are found at a concentration greater than 0.010 mg/l. The specialized definitions for each subpart contain a discrete list of toxic organic compounds comprising TTO for each process segment in which TTO is regulated.
§ 464.03 Monitoring and reporting requirements.
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(a) As an alternative to monitoring for TTO (total toxic organics), an indirect discharging plant may elect to monitor for Oil and Grease instead. Compliance with the Oil and Grease standard shall be considered equivalent to complying with the TTO standard. Alternate Oil and Grease standards are provided as substitutes for the TTO standards provided in §§464.15, 464.16, 464.25, 464.26, 464.35, 464.36, 464.45, and 464.46.
(b) POTWs may establish concentration standards rather than mass standards, but must ensure that the concentration standards are exactly equivalent to the mass-based standards provided in §§464.15, 464.16, 464.25, 464.26, 464.35, 464.36, 464.45, and 464.46. Equivalent concentration standards may be determined by multiplying the mass-based standards included in the regulations by an appropriate measurement of average production, raw material usage, or air scrubber flow (kkg of metal poured, kkg of sand reclaimed, or standard cubic meters of air scrubbed) and dividing by an appropriate measure of average discharge flow to the POTW, taking into account the proper conversion factors to ensure that the units (mg/l) are correct.
(c) The “monthly average” regulatory values shall be the basis for the monthly average effluent limitations guidelines and standards in direct discharge permits and for pretreatment standards. Compliance with the monthly average effluent limitations guidelines and standards is required regardless of the number of samples analyzed and averaged.
§ 464.04 Compliance date for PSES.
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The compliance date of PSES is October 31, 1988.
Subpart A—Aluminum Casting Subcategory
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§ 464.10 Applicability; description of the aluminum casting subcategory.
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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 aluminum casting operations as defined in §464.02(a).
§ 464.11 Specialized definitions.
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For the purpose of this subpart:
(a) Total toxic organics (TTO). TTO is a regulated parameter under PSES (§464.15) and PSNS (§464.16) for the aluminum 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 (§464.15(b) and §464.16(b)):
4. benzene
21. 2,4,6-trichlorophenol
22. Para-chloro meta-cresol
23. chloroform (trichloromethane)
34. 2,4-dimethylphenol
39. fluoranthene
44. methylene chloride (dichloromethane)
65. phenol
66. bis(2-ethylhexyl) phthalate
67. butyl benzyl phthalate
84. pyrene
85. tetrachloroethylene
87. trichloroethylene
(2) Die Casting (§464.15(c) and §464.16(c)):
1. acenaphthene
4. benzene
7. chlorobenzene
11. 1,1,1-trichloroethane
21. 2,4,6-trichlorophenol
22. para-chloro meta-cresol
23. chloroform (trichloromethane)
34. 2,4-dimethylphenol
39. fluoranthene
44. methylene chloride (dichloromethane)
55. naphthalene
65. phenol
66. bis(2-ethylhexyl) phthalate
67. butyl benzyl phthalate
68. di-n-butyl phthalate
70. diethyl phthalate
72. benzo (a)anthracene (1,2-benzanthracene)
73. benzo (a)pyrene (3,4-benzopyrene)
76. chrysene
78. anthracene
80. fluorene
81. phenanthrene
84. pyrene
85. tetrachloroethylene
86. toluene
(3) Dust Collection Scrubber (§464.15(d) and §464.16(d)):
1. acenaphthene
21. 2,4,6-trichlorophenol
23. chloroform (trichloromethane)
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
73. benzo (a)pyrene (3,4-benzopyrene)
84. pyrene
(4) Investment Casting (§464.15(f) and §464.16(f)):
11. 1,1,1-trichloroethane
23. chloroform (trichloromethane)
44. methylene chloride (dichloromethane)
66. bis (2-ethylhexyl) phthalate
84. pyrene
85. tetrachloroethylene
87. trichloroethylene
(5) Melting Furnace Scrubber (§464.15(g) and §464.16(g)):
1. acenaphthene
21. 2,4,6-trichlorophenol
23. chloroform (trichloromethane)
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
73. benzo (a)pyrene (3,4-benzopyrene)
84. pyrene
(6) Mold Cooling (§464.15(h) and §464.16(h)):
4. benzene
21. 2,4,6-trichlorophenol
22. para-chloro meta-cresol
23. chloroform (trichloromethane)
34. 2,4-dimethylphenol
39. fluoranthene
44. methylene chloride
65. phenol
66. bis(2-ethylhexyl) phthalate
67. butyl benzyl phthalate
84. pyrene
85. tetrachloroethylene
87. trichloroethylene
§ 464.12 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
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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 Sm 3 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 limitation and annual average mass limitation shall only apply to non-continuous dischargers.
(a) Casting Cleaning Operations.
BPT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/1,000 kkg
(pounds per
million
pounds) of
metal poured
---------------------------
Copper (T).................................. 0.0771 0.0421
Lead (T).................................... 0.0791 0.039
Zinc (T).................................... 0.114 0.0431
Oil & grease............................ 3.0 1.0
TSS......................................... 3.80 1.50
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.00 at all times.
------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\
------------------------------------------------------------------------
(mg/l)\2\ (mg/l)\2\
Copper (T)............................ 0.77 0.42 0.017
Lead (T).............................. 0.79 0.39 0.022
Zinc (T).............................. 1.14 0.43 0.027
Oil & grease...................... 30 10 0.501
TSS................................... 38 15 1.0
pH.................................... (\3\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.
\2\ These concentrations must be multiplied by the ratio of (12/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.
(b) Casting Quench Operations.
BPT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/1,000 kkg
(pounds per
million
pounds) of
metal poured
---------------------------
Copper (T).................................. 0.0093 0.0051
Lead (T).................................... 0.0096 0.0047
Zinc (T).................................... 0.0138 0.0052
Oil & grease............................ 0.363 0.121
TSS......................................... 0.46 0.182
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.
------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\
------------------------------------------------------------------------
(mg/l)\2\ (mg/l)\2\
Copper (T).......................... 0.77 0.42 0.0021
Lead (T)............................ 0.79 0.39 0.0027
Zinc (T)............................ 1.14 0.43 0.0033
Oil & grease.................... 30 10 0.0605
TSS................................. 38 15 0.121
pH.................................. (\3\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.
\2\ These concentrations must be multiplied by the ratio of (1.45/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.
(c) Die Casting Operations.
BPT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/1,000 kkg
(pounds per
million
pounds) of
metal poured
---------------------------
Copper (T).................................. 0.0066 0.0036
Lead (T).................................... 0.0068 0.0034
Zinc (T).................................... 0.0098 0.0037
Total Phenols............................... 0.0074 0.0026
Oil & Grease............................ 0.259 0.0864
TSS......................................... 0.33 0.13
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ With the range of 7.0 to 10.0 at all times.
------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\
------------------------------------------------------------------------
(mg/l) (mg/l)
(\2\) (\2\)
Copper (T).......................... 0.77 0.42 0.0015
Lead (T)............................ 0.79 0.39 0.0019
Zinc (T)............................ 1.14 0.43 0.0023
Total Phenols....................... 0.86 0.3 0.0017
Oil & Grease.................... 30 10 0.0432
TSS................................. 38 15 0.0864
pH.................................. (\3\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ 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.
\3\ Within the range of 7.0 to 10.0 at all times,
(d) Dust Collection Scrubber Operations.
BPT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/62.3
million
Sm\3\
(pounds per
billion SCF)
of air
scrubbed
---------------------------
Copper (T).................................. 0.231 0.126
Lead (T).................................... 0.237 0.117
Zinc (T).................................... 0.343 0.129
Total Phenols............................... 0.258 0.09
Oil & Grease............................ 9.01 3.0
TSS......................................... 11.4 4.51
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.
------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\
------------------------------------------------------------------------
(mg/l)\2\ mg/
l)\2\
Copper (T)............................. 0.77 0.42 0.0511
Lead (T)............................... 0.79 0.39 0.0661
Zinc (T)............................... 1.14 0.43 0.0811
Total Phenols.......................... 0.86 0.3 0.0601
Oil & Grease....................... 30 10 1.5
TSS.................................... 38 15 3.0
pH..................................... (\3\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ kg/62.3 million SM\3\ (pounds per billion SCF) of air scrubbed.
\2\ These concentrations must be multiplied by the ratio of (0.036/x)
where x is the actual normalized process waste-water flow (in gallons
per 1,000 SCF of air scrubbed) for a specific plant.
\3\ Within the range of 7.0 to 10.0 at all times.
(e) Grinding Scrubber Operations. No discharge of process wastewater pollutants to navigable waters.
(f) Investment Casting.
BPT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/1,000 kkg
(pounds per
million
pounds) of
metal poured
---------------------------
Copper (T).................................. 8.48 4.63
Lead (T).................................... 8.7 4.3
Zinc (T).................................... 12.6 4.74
Oil and grease.............................. 330 110
TSS......................................... 419 165
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.
------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\
------------------------------------------------------------------------
(mg/l)\2\ (mg/l)\2\
Copper (T)........................... 0.77 0.42 1.87
Lead (T)............................. 0.79 0.39 2.42
Zinc (T)............................. 1.14 0.43 2.97
Oil and grease....................... 30 10 55.1
TSS.................................. 38 15 110
pH................................... (\3\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.
\2\ These concentrations must be multiplied by the ratio of (1,320/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.
(g) Melting Furnace Scrubber Operations.
BPT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/62.3
million
Sm\3\
(pounds per
billion SCF)
of air
scrubbed
---------------------------
Copper (T).................................. 3.01 1.64
Lead (T).................................... 3.09 1.52
Zinc (T).................................... 4.45 1.68
Total phenols............................... 3.36 1.17
Oil and grease.............................. 117 39.1
TSS......................................... 148 58.6
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.
------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)............................ 0.77 0.42 0.664
Lead (T).............................. 0.79 0.39 0.859
Zinc (T).............................. 1.14 0.43 1.05
Total phenols......................... 0.86 0.3 0.781
Oil and grease........................ 30 10 19.5
TSS................................... 38 15 39.1
pH.................................... (\2\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ kg/62.3 million Sm\3\ (pounds per billion SCF) of air scrubbed.
\2\ These concentrations must be multiplied by the ratio of (0.468/x)
where x is the acutal normalized process wastewater flow (in gallons
per 1,000 SCF of air scrubbed) for a specific plant.
\3\ Within the range of 7.0 to 10.0 at all times.
(h) Mold Cooling Operations.
BPT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/1,000 kkg
(pounds per
million
pounds) of
metal poured
---------------------------
Copper (T).................................. 0.297 0.162
Lead (T).................................... 0.305 0.151
Zinc (T).................................... 0.44 0.166
Oil and grease.............................. 11.6 3.86
TSS......................................... 14.7 5.79
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.
------------------------------------------------------------------------
Maximum for
Maximum for monthly Annual
any 1 day average average \1\
------------------------------------------------------------------------
(mg/l) \1\ (mg/) \1\
Copper (T)..................... 0.77 0.42 0.0656
Lead (T)....................... 0.79 0.39 0.0849
Zinc (T)....................... 1.14 0.43 0.104
Oil and grease................. 30 10 1.93
TSS............................ 38 15 3.86
pH............................. (\3\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million pounds) of metal
\2\ These concentrations must be multiplied by the ratio of (46.3/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 21760, June 16, 1986]
§ 464.13 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
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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 Sm 3 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 Cleaning Operations.
BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/1,000 kkg
(pounds per
million
pounds) of
metal poured
-----------------------------
Copper (T)................................ 0.0771 0.0421
Lead (T).................................. 0.0791 0.039
Zinc (T).................................. 0.114 0.0431
------------------------------------------------------------------------
------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)............................. 0.77 0.42 0.017
Lead (T)............................... 0.79 0.39 0.022
Zinc (T)............................... 1.14 0.43 0.027
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.
\2\These concentrations must be multiplied by the ratio of (12/x) where
x is the actual normalized process wastewater flow (in gallons per
1,000 pounds of metal poured) for a specific plant.
(b) Casting Quench Operations.
BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/1,000 kkg
(pounds per
million
pounds) of
metal poured
---------------------------
Copper (T).................................. 0.0093 0.0051
Lead (T).................................... 0.0096 0.0047
Zinc (T).................................... 0.0138 0.0052
------------------------------------------------------------------------
------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)............................. 0.77 0.42 0.0021
Lead (T)............................... 0.79 0.39 0.0027
Zinc (T)............................... 1.14 0.43 0.0033
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.
\2\These concentrations must be multiplied by the ratio of (1.45/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 pounds of metal poured) for a specific plant.
(c) Die Casting Operations.
BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/1,000 kkg
(pounds per
million
pounds) of
metal poured
---------------------------
Copper (T).................................. 0.0066 0.0036
Lead (T).................................... 0.0068 0.0034
Zinc (T).................................... 0.0098 0.0037
Total Phenols............................... 0.0074 0.0026
------------------------------------------------------------------------
------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)............................. 0.77 0.42 0.0015
Lead (T)............................... 0.79 0.39 0.0019
Zinc (T)............................... 1.14 0.43 0.0023
Total Phenols.......................... 0.86 0.3 0.0017
------------------------------------------------------------------------
\1\ 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.
(d) Dust Collection Scrubber Operations.
BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/62.3
million
Sm\3\
(pounds per
billion SCF)
of air
scrubbed
---------------------------
Copper (T).................................. 0.231 0.126
Lead (T).................................... 0.237 0.117
Zinc (T).................................... 0.343 0.129
Total Phenols............................... 0.258 0.09
------------------------------------------------------------------------
------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)............................. 0.77 0.42 0.0511
Lead (T)............................... 0.79 0.39 0.0661
Zinc (T)............................... 1.14 0.43 0.0811
Total Phenols.......................... 0.86 0.3 0.0601
------------------------------------------------------------------------
\1\ kg/62.3 million Sm\3\ (lb per billion SCF) of air scrubbed.
\2\ These concentrations must be multiplied by the ratio of (0.036/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 SCF of air scrubbed) for a specific plant.
(e) Grinding Scrubber Operations. No discharge of process wastewater pollutants to navigable waters.
(f) Investment Casting.
BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/1,000 kkg
(pounds per
million
pounds) of
metal poured
---------------------------
Copper (T).................................. 8.48 4.63
Lead (T).................................... 8.7 4.3
Zinc (T).................................... 12.6 4.74
------------------------------------------------------------------------
------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)............................. 0.77 0.42 1.87
Lead (T)............................... 0.79 0.39 2.42
Zinc (T)............................... 1.14 0.43 2.97
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.
\2\ These concentrations must be multiplied by the ratio of (1,320/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 pounds of metal poured) for a specific plant.
(g) Melting Furnace Scrubber Operations.
BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/62.3
million
Sm\3\
(pounds per
billion SCF)
of air
scrubbed
---------------------------
Copper (T).................................. 3.01 1.64
Lead (T).................................... 3.09 1.52
Zinc (T).................................... 4.45 1.68
Total phenols............................... 3.36 1.17
------------------------------------------------------------------------
------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)............................ 0.77 0.42 0.664
Lead (T).............................. 0.79 0.39 0.859
Zinc (T).............................. 1.14 0.43 1.05
Total phenols......................... 0.86 0.3 0.781
------------------------------------------------------------------------
\1\ kg/62.3 million Sm\3\ (pounds per billion SCF) of air scrubbed
\2\ These concentrations must be multiplied by the ratio of (0.468/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 SCF of air scrubbed) for a specific plant.
(h) Mold Cooling Operations.
BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/1,000 kkg
(pounds per
million
pounds) of
metal poured
---------------------------
Copper (T).................................. 0.297 0.162
Lead (T).................................... 0.305 0.151
Zinc (T).................................... 0.44 0.166
------------------------------------------------------------------------
------------------------------------------------------------------------
Maximum Maximum for
for any 1 monthly Annual
day average average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)........................ 0.77 0.42 0.0656
Lead (T).......................... 0.79 0.39 0.0849
Zinc (T).......................... 1.14 0.43 0.104
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.
\2\ These concentrations must be multiplied by the ratio of (46.3/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 pounds of metal poured) for a specific plant.
[50 FR 45247, Oct. 30, 1985; 51 FR 21760, June 16, 1986]
§ 464.14 New source performance standards.
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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 Sm 3 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 Cleaning Operations.
NSPS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/1,000 kkg
(pounds per
million
pounds) of
metal poured
---------------------------
Copper (T).................................. 0.0771 0.0421
Lead (T).................................... 0.0791 0.039
Zinc (T).................................... 0.114 0.0431
Oil and grease.............................. 3.0 1.0
TSS......................................... 3.8 1.5
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.
------------------------------------------------------------------------
Maximum Maximum for
for any 1 monthly Annual
day average average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)........................ 0.77 0.42 0.017
Lead (T).......................... 0.79 0.39 0.022
Zinc (T).......................... 1.14 0.43 0.027
Oil and grease.................... 30 10 0.501
TSS............................... 38 15 1.0
pH................................ (\3\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.
\2\ These concentrations must be multiplied by the ratio of (12/x) where (continued)
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