CCLME.ORG - 40 CFR PART 464—METAL MOLDING AND CASTING POINT SOURCE CATEGORY

(continued)
any 1 day average
------------------------------------------------------------------------
kg/62.3
million Sm\3\
(pounds per
billion SCF)
of air
scrubbed
-----------------------------
Copper (T)................................ 1.02 0.561
Lead (T).................................. 1.86 0.911
Zinc (T).................................. 3.44 1.3
Total Phenols............................. 3.01 1.05
------------------------------------------------------------------------

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\ .........
Copper (T)......................... 0.29 0.16 0.228
Lead (T)........................... 0.53 0.26 0.526
Zinc (T)........................... 0.98 0.37 0.911
Total Phenols...................... 0.86 0.3 0.701
------------------------------------------------------------------------
\1\ kg/62.3 million Sm \3\ (pounds per billion SCF) of air scrubbed
\2\ These concentrations must be multiplied by the ratio of (0.42/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 SCF of air scrubbed) for a specific plant.

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

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)................................ 1.02 0.561
Lead (T).................................. 2.77 1.37
Zinc (T).................................. 5.15 1.96
Total Phenols............................. 3.01 1.05
------------------------------------------------------------------------

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\ .........
Copper (T)......................... 0.29 0.16 0.228
Lead (T)........................... 0.79 0.39 0.771
Zinc (T)........................... 1.47 0.56 1.4
Total Phenols...................... 0.86 0.3 0.701
------------------------------------------------------------------------
\1\ kg/62.3 million Sm \3\ (pounds per billion SCF) of air scrubbed.
\2\ These concentrations must be multiplied by the ratio of (0.42/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 SCF of air scrubbed) for a specific plant.

(g) Mold Cooling Operations. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

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).................................. 0.0428 0.0236
Lead (T).................................... 0.0783 0.0384
Zinc (T).................................... 0.145 0.0546
------------------------------------------------------------------------

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)........................... 0.29 0.16 0.0096
Lead (T)............................. 0.53 0.26 0.0222
Zinc (T)............................. 0.98 0.37 0.0384
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.
\2\ These concentrations must be multiplied by the ratio of (17.7/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 pounds of metal poured) for a specific plant.

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

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).................................. 0.0428 0.0236
Lead (T).................................... 0.117 0.0576
Zinc (T).................................... 0.217 0.0827
------------------------------------------------------------------------

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)........................... 0.29 0.16 0.0096
Lead (T)............................. 0.79 0.39 0.0325
Zinc (T)............................. 1.47 0.56 0.0591
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.
\2\ These concentrations must be multiplied by the ratio of (17.7/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 pounds of metal poured) for a specific plant.

(h) Slag Quench Operations. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

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).................................. 0.0527 0.0291
Lead (T).................................... 0.0964 0.0473
Zinc (T).................................... 0.178 0.0673
------------------------------------------------------------------------

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)........................... 0.29 0.16 0.0118
Lead (T)............................. 0.53 0.26 0.0273
Zinc (T)............................. 0.98 0.37 0.0473
------------------------------------------------------------------------
\1\ Kg/1,000 kkg (pounds per million pounds) of metal poured.
\2\ These concentrations must be multiplied by the ratio of (21.8/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 pounds of metal poured) for a specific plant.

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

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).................................. 0.0527 0.0291
Lead (T).................................... 0.144 0.0709
Zinc (T).................................... 0.267 0.102
------------------------------------------------------------------------

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)........................... 0.29 0.16 0.0118
Lead (T)............................. 0.79 0.39 0.04
Zinc (T)............................. 1.47 0.56 0.0728
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.
\2\ These concentrations must be multiplied by the ratio of (21.8/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 pounds of metal poured) for a specific plant.

(i) Wet Sand Reclamation Operations. (1) Applicable to plants that are casting primarily ductible or gray iron and to plants that are casting malleable iron where greater than 3,557 tons of metal are poured per year.

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
sand
reclaimed
-----------------------------
Copper (T)................................ 0.217 0.12
Lead (T).................................. 0.396 0.194
Zinc (T).................................. 0.732 0.276
Total Phenols............................. 0.642 0.224
------------------------------------------------------------------------

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)......................... 0.29 0.16 0.0485
Lead (T)........................... 0.53 0.26 0.112
Zinc (T)........................... 0.98 0.37 0.194
Total Phenols...................... 0.86 0.3 0.149
------------------------------------------------------------------------
\1\ kg/1000 kkg (pounds per million pounds) of sand reclaimed.
\2\ These concentrations must be multiplied by the ratio of (89.5/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 pounds of sand reclaimed) for a specific plant.

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

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
sand
reclaimed
-----------------------------
Copper (T)................................ 0.217 0.12
Lead (T).................................. 0.59 0.291
Zinc (T).................................. 1.1 0.418
Total Phenols............................. 0.642 0.224
------------------------------------------------------------------------

PSNS
------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)........................... 0.29 0.16 0.0485
Lead (T)............................. 0.79 0.39 0.164
Zinc (T)............................. 1.47 0.56 0.299
Total Phenols........................ 0.86 0.3 0.149
------------------------------------------------------------------------
\1\ kg/1000 kkg (pounds per million pounds) of sand reclaimed.
\2\ These concentrations must be multiplied by the ratio of (89.5/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 pounds of sand reclaimed) for a specific plant.

[50 FR 45247, Oct. 30, 1985; 51 FR 21761, June 16, 1986]

§ 464.34 New source performance standards.
top
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/1,000 kkg or lb/million lb of sand reclaimed; 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. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

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).................................. 0.0129 0.0071
Lead (T).................................... 0.0237 0.0116
Zinc (T).................................... 0.0437 0.0165
Oil and grease.............................. 1.34 0.446
TSS......................................... 0.67 0.536
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)........................... 0.29 0.16 0.0029
Lead (T)............................. 0.53 0.26 0.0067
Zinc (T)............................. 0.98 0.37 0.0116
Oil and grease....................... 30 10 0.223
TTS.................................. 15 12 0.116
pH................................... (\3\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ kg/1000 kkg (pounds per million pounds) of metal poured.
\2\ These concentrations must be multiplied by the ratio of (5.33/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.

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

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).................................. 0.0129 0.0071
Lead (T).................................... 0.0353 0.0174
Zinc (T).................................... 0.0656 0.025
Oil and grease.............................. 1.34 0.446
TSS......................................... 1.7 0.67
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)........................... 0.29 0.16 0.0029
Lead (T)............................. 0.79 0.39 0.0098
Zinc (T)............................. 1.47 0.56 0.0179
Oil and grease....................... 30 10 0.223
TTS.................................. 38 15 0.446
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 (5.35/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. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

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).................................. 0.0138 0.0076
Lead (T).................................... 0.0252 0.0124
Zinc (T).................................... 0.0466 0.0176
Oil and grease.............................. 1.43 0.476
TSS......................................... 0.713 0.571
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)........................... 0.29 0.16 0.0031
Lead (T)............................. 0.53 0.26 0.0071
Zinc (T)............................. 0.98 0.37 0.0124
Oil and grease....................... 30 10 0.238
TSS.................................. 15 12 0.124
pH................................... (\3\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ Kg/1000 kkg (pounds per million pounds) of metal poured.
\2\ Within the range of 7.0 to 10.0 at all times.
\3\ These concentrations must be multiplied by the ratio of (5.7/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 pounds of metal poured) for a specific plant.

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

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).................................. 0.0138 0.0076
Lead (T).................................... 0.0376 0.0185
Zinc (T).................................... 0.0699 0.0266
Oil and grease.............................. 1.43 0.476
TSS......................................... 1.81 0.713
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)........................... 0.29 0.16 0.0031
Lead (T)............................. 0.79 0.39 0.0105
Zinc (T)............................. 1.47 0.56 0.019
Oil and grease....................... 30 10 0.238
TSS.................................. 38 15 0.476
pH................................... (\3\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ Kg/1000 kkg (pounds per million pounds) of metal poured.
\2\ These concentrations must be multiplied by the ratio of (5.7/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) Dust Collection Scrubber Operations. (1) Applicable to plants that are casting primarily ductible or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

NSPS
------------------------------------------------------------------------
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)................................ 0.218 0.12
Lead (T).................................. 0.398 0.195
Zinc (T).................................. 0.736 0.278
Total Phenols............................. 0.646 0.225
Oil and grease............................ 22.5 7.51
TSS....................................... 11.3 9.01
pH........................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)........................... 0.29 0.16 0.0488
Lead (T)............................. 0.53 0.26 0.113
Zinc (T)............................. 0.98 0.37 0.195
Total phenols........................ 0.86 0.3 0.15
Oil and grease....................... 30 10 3.76
TSS.................................. 15 12 1.95
pH................................... (\3\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ kg/62.3 millions Sm\3\ (pound per billion SCF) of air scrubbed.
\2\ Within the range of 7.0 to 10.0 at all times.
\3\ These concentrations must be multiplied by the ratio of (0.09/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 SCF of air scrubbed) for a specific plant.

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

NSPS
------------------------------------------------------------------------
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)................................ 0.218 0.12
Lead (T).................................. 0.593 0.293
Zinc (T).................................. 1.1 0.421
Total phenols............................. 0.656 0.225
Oil and grease............................ 22.5 7.51
TSS....................................... 28.5 11.3
pH........................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)........................... 0.29 0.16 0.0488
Lead (T)............................. 0.79 0.39 0.165
Zinc (T)............................. 1.47 0.56 0.3
Total phenols........................ 0.86 0.3 0.15
Oil and grease....................... 30 10 3.76
TSS.................................. 38 15 7.51
pH................................... (\3\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ kg/62.3 millions Sm\3\ (pound per billion SCF) of air scrubbed.
\2\ Within the range of 7.0 to 10.0 at all times.
\3\ These concentrations must be multiplied by the ratio of (0.09/)
where is the actual normalized process wastewater flow (in gallons per
1,000 SCF of air scrubbed) for a specific plant.

(d) Grinding Scrubber Operations. No discharge of process wastewater pollutants to navigable waters.

(e) Investment Casting. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

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)................................ 3.19 1.76
Lead (T).................................. 5.84 2.86
Zinc (T).................................. 10.8 4.07
Oil and grease............................ 330 110
TSS....................................... 165 132
pH........................................ (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)......................... 0.29 0.16 0.716
Lead (T)........................... 0.53 0.26 1.65
Zinc (T)........................... 0.98 0.37 2.86
Oil and grease..................... 30 10 55.1
TSS................................ 15 12 28.6
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.

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

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)................................ 3.19 1.76
Lead (T).................................. 8.7 4.3
Zinc (T).................................. 16.2 6.17
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 for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)......................... 0.29 0.16 0.716
Lead (T)........................... 0.79 0.39 2.42
Zinc (T)........................... 1.47 0.56 4.41
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.

(f) Melting Furnace Scrubber Operations. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

NSPS
------------------------------------------------------------------------
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)................................ 1.02 0.561
Lead (T).................................. 1.86 0.911
Zinc (T).................................. 3.44 1.30
Total phenols............................. 3.01 1.05
Oil and grease............................ 105 35
TSS....................................... 52.6 42.1
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
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)......................... 0.29 0.16 0.228
Lead (T)........................... 0.53 0.26 0.526
Zinc (T)........................... 0.98 0.37 0.911
Total phenols...................... 0.86 0.3 0.701
Oil and grease..................... 30 10 17.5
TSS................................ 15 12 9.11
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 (0.42/x)
where x is the actual 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.

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

NSPS
------------------------------------------------------------------------
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)................................ 1.02 0.561
Lead (T).................................. 2.77 1.37
Zinc (T).................................. 5.15 1.96
Total phenols............................. 3.01 1.05
Oil and grease............................ 105 35
TSS....................................... 133 52.6
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
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)......................... 0.29 0.16 0.228
Lead (T)........................... 0.79 0.39 0.771
Zinc (T)........................... 1.47 0.56 1.4
Total phenols...................... 0.38 0.3 0.701
Oil and grease..................... 30 10 17.5
TSS................................ 38 15 35
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 (0.42/x)
where x is the actual 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.

(g) Mold Cooling Operations. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

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).................................. 0.0428 0.0236
Lead (T).................................... 0.0783 0.0384
Zinc (T).................................... 0.0145 0.0546
Oil and grease.............................. 4.43 1.48
TSS......................................... 2.22 1.77
pH.......................................... (\1\) (\1\)
------------------------------------------------------------------------
\1\ Within the range of 7.0 to 10.0 at all times.

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \1\
Copper (T)........................... 0.29 0.16 0.0096
Lead (T)............................. 0.53 0.26 0.0222
Zinc (T)............................. 0.98 0.37 0.0384
Oil and grease....................... 30 10 0.738
TSS.................................. 15 12 0.384
pH................................... (\3\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million) pounds of metal poured. (continued)