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

(continued)
billion SCF)
of air
scrubbed
-----------------------------
Copper (T)................................ 1.81 0.988
Lead (T).................................. 1.86 0.918
Zinc (T).................................. 2.68 1.01
Total phenols............................. 2.02 0.706
Oil and grease............................ 70.6 23.5
TSS....................................... 89.4 35.3
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)......................... 0.77 0.42 0.4
Lead (T)........................... 0.79 0.39 0.518
Zinc (T)........................... 1.14 0.43 0.635
Total phenols...................... 0.86 0.3 0.467
Oil and grease..................... 30 10 11.8
TSS................................ 38 15 23.5
pH................................. (\3\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ kg/62.3 million Sm\3\ (pound per billion SCF) of air scrubbed.
\2\ These concentrations must be multiplied by the ratio of (0.282/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.

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)................................ 0.392 0.214
Lead (T).................................. 0.402 0.199
Zinc (T).................................. 0.58 0.219
Oil and grease............................ 15.3 5.09
TSS....................................... 19.3 7.63
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)......................... 0.77 0.42 0.0865
Lead (T)........................... 0.79 0.39 0.112
Zinc (T)........................... 1.14 0.43 0.137
Oil and grease..................... 30 10 2.54
TSS................................ 38 15 5.09
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 (61/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]

§ 464.23 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
top
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 discharges, 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.

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).................................... 0.0307 .0168
Lead (T)...................................... 0.0211 .0104
Zinc (T)...................................... 0.0303 .0116
------------------------------------------------------------------------

------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\
------------------------------------------------------------------------
(mg/l) (mg/l)
\2\ \2\
Copper (T)............................ 0.77 0.42 0.0068
Lead (T).............................. 0.53 0.26 0.006
Zinc (T).............................. 0.76 0.29 0.0072
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.
\2\ These concentrations must be multiplied by the ratio of (4.8/x)
where x is the actual normalized process waste-water flow (in gallons
per 1,000 pounds of metal poured) for a specific plant.

(b) Direct Chill 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).................................. 0.928 0.506
Lead (T).................................... 0.639 0.314
Zinc (T).................................... 0.916 0.35
------------------------------------------------------------------------

------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\
------------------------------------------------------------------------
(mg/l) (mg/l)
\2\ \2\
Copper (T)............................. 0.77 0.42 0.205
Lead (T)............................... 0.53 0.26 0.181
Zinc (T)............................... 0.76 0.29 0.217
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.
\2\ These concentrations must be multiplied by the ratio of (145/x)
where x is the actual normalized process waste-water flow (in gallons
per 1,000 pounds of metal poured) for a specific plant.

(c) 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)................................ 0.553 0.301
Lead (T).................................. 0.38 0.187
Zinc (T).................................. 0.545 0.208
Total phenols............................. 0.617 0.215
------------------------------------------------------------------------

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)......................... 0.77 0.42 0.122
Lead (T)........................... 0.53 0.26 0.108
Zinc (T)........................... 0.76 0.29 0.129
Total phenols...................... 0.86 0.3 0.144
------------------------------------------------------------------------
\1\ kg/62.3 million Sm\3\ (pounds per billion SCF) of air scrubbed.
\2\ These concentrations must be multiplied by the ratio of (0.086/x)
where x 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.

BAT Effluent Limitations
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/1000 kkg
(pounds per
million
pounds) of
metal poured
-----------------------------
Copper (T)................................ 8.48 4.63
Lead (T).................................. 5.84 2.86
Zinc (T).................................. 8.37 3.19
------------------------------------------------------------------------

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)......................... 0.77 0.42 1.87
Lead (T)........................... 0.53 0.26 1.65
Zinc (T)........................... 0.76 0.29 1.98
------------------------------------------------------------------------
\1\ kg/1000 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.

(f) 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)................................ 1.81 0.988
Lead (T).................................. 1.25 0.612
Zinc (T).................................. 1.79 0.673
Total phenols............................. 2.02 0.706
------------------------------------------------------------------------

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)......................... 0.77 0.42 0.4
Lead (T)........................... 0.53 0.26 0.353
Zinc (T)........................... 0.76 0.29 0.424
Total phenols...................... 0.86 0.3 0.471
------------------------------------------------------------------------
\1\ kg/62.3 million Sm \3\ (pounds per billion SCF) of air scrubbed.
\2\ These concentrations must be multiplied by the ratio of (0.282/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.

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)................................ 0.392 0.214
Lead (T).................................. 0.27 0.132
Zinc (T).................................. 0.387 0.148
------------------------------------------------------------------------

------------------------------------------------------------------------
Maximum for Annual
Maximum for monthly average
any 1 day average \1\
------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\
Copper (T)........................ 0.77 0.42 0.0865
Lead (T).......................... 0.53 0.26 0.0763
Zinc (T).......................... 0.76 0.29 0.0916
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.
\2\ These concentrations must be multiplied by the ratio of (61/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 21761, June 16, 1986]

§ 464.24 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/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 Quench 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).................................. 0.0307 0.0168
Lead (T).................................... 0.0211 0.0104
Zinc (T).................................... 0.0303 0.0116
Oil and grease.............................. 1.2 0.399
TSS......................................... 0.598 0.479
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)......................... 0.77 0.42 0.0068
Lead (T)........................... 0.53 0.26 0.006
Zinc (T)........................... 0.76 0.29 0.0072
Oil and grease..................... 30 10 0.199
TSS................................ 15 12 0.104
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 (4.8/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) Direct Chill Casting 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)................................ 0.928 0.506
Lead (T).................................. 0.639 0.314
Zinc (T).................................. 0.916 0.35
Oil and grease............................ 36.2 12.1
TSS....................................... 18.1 14.5
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)........................... 0.77 0.42 0.205
Lead (T)............................. 0.53 0.26 0.181
Zinc (T)............................. 0.76 0.29 0.217
Oil and grease....................... 30 10 6.03
TSS.................................. 15 12 3.13
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 (145/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.

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)................................ 0.553 0.301
Lead (T).................................. 0.38 0.187
Zinc (T).................................. 0.545 0.208
Total phenols............................. 0.617 0.215
Oil and grease............................ 21.5 7.18
TSS....................................... 10.8 8.61
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)......................... 0.77 0.42 0.122
Lead (T)........................... 0.53 0.26 0.108
Zinc (T)........................... 0.76 0.29 0.129
Total phenols...................... 0.86 0.3 0.144
Oil and grease..................... 30 10 3.59
TSS................................ 15 12 1.87
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 (0.086/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.

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

(e) Investment Casting.

NSPS
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/1,000 kkg
(pounds per
millions
pounds) of
metal poured
-----------------------------
Copper (T)................................ 8.48 4.63
Lead (T).................................. 5.84 2.86
Zinc (T).................................. 8.37 3.19
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)......................... 0.77 0.42 1.87
Lead (T)........................... 0.53 0.26 1.65
Zinc (T)........................... 0.76 0.29 1.98
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.

(f) Melting Furnace Scrubber Operations.

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)................................ 1.81 0.988
Lead (T).................................. 1.25 0.612
Zinc (T).................................. 1.79 0.673
Total phenols............................. 2.02 0.706
Oil and grease............................ 70.6 23.5
TSS....................................... 35.3 28.2
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)......................... 0.77 0.42 0.4
Lead (T)........................... 0.53 0.26 0.353
Zinc (T)........................... 0.76 0.29 0.424
Total phenols...................... 0.86 0.3 0.471
Oil and grease..................... 30 10 11.8
TSS................................ 15 12 6.12
pH................................. (\3\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ kg/62.3 Sm \3\ (pounds per billion SCF) of air scrubbed.
\2\ These concentrations must be multiplied by the ratio of (0.282/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.

(g) Mold Cooling 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)................................ 0.392 0.214
Lead (T).................................. 0.27 0.132
Zinc (T).................................. 0.387 0.148
Oil and grease............................ 15.3 5.09
TSS....................................... 7.63 6.11
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/1) \2\ (mg/1) \2\
Copper (T)........................... 0.77 0.42 0.0865
Lead (T)............................. 0.53 0.26 0.0763
Zinc (T)............................. 0.76 0.29 0.0916
Oil and grease....................... 30 10 2.54
TSS.................................. 15 12 1.32
pH................................... (\3\) (\3\) (\3\)
------------------------------------------------------------------------
\1\ kg/1,000 kkg (pounds per million pound) of metal poured.
\2\ These concentrations must be multiplied by the ratio of (61/x) where
x is the actual normalized process waste-water 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 21761, June 16, 1986]

§ 464.25 Pretreatment standards for existing sources.
top
Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources.

(a) Casting Quench Operations.

PSES
------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average
------------------------------------------------------------------------
kg/1000 kkg
(pounds per
million
pounds) of
metal poured
---------------------------
Copper (T).................................. 0.0307 0.0168
Lead (T).................................... 0.0211 0.0104
Zinc (T).................................... 0.0303 0.0116
TTO......................................... 0.0335 0.0109
Oil and grease (for alternate monitoring)... 1.2 0.399
------------------------------------------------------------------------

(b) Direct Chill Casting Operations.

PSES
------------------------------------------------------------------------
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)................................ 0.928 0.506
Lead (T).................................. 0.639 0.314
Zinc (T).................................. 0.916 0.35
------------------------------------------------------------------------

(c) Dust Collection Scrubber Operations.

PSES
------------------------------------------------------------------------
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)................................ 0.552 0.301
Lead (T).................................. 0.38 0.187
Zinc (T).................................. 0.545 0.208
Total phenols............................. 0.617 0.215
TTO....................................... 1.65 0.54
Oil and grease (for alternate monitoring). 21.5 7.18
------------------------------------------------------------------------

(d) Grinding Scrubber Operations. No discharge of process wastewater pollutants to a POTW.

(e) Investment Casting.

PSES
------------------------------------------------------------------------
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).................................. 5.84 2.86
Zinc (T).................................. 8.37 3.19
TTO....................................... 25.4 8.29
Oil and grease for alternate monitoring).. 330 110
------------------------------------------------------------------------

(f) Melting Furnace Scrubber Operations.

PSES
------------------------------------------------------------------------
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)................................ 1.81 0.988
Lead (T).................................. 1.25 0.612
Zinc (T).................................. 1.79 0.673
Total phenols............................. 2.02 0.706
TTO....................................... 5.41 1.77
Oil and grease (for alternate monitoring). 70.6 23.5
------------------------------------------------------------------------

(g) Mold Cooling Operations.

PSES
------------------------------------------------------------------------
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)................................ 0.392 0.214
Lead (T).................................. 0.27 0.132
Zinc (T).................................. 0.387 0.148
TTO....................................... 0.428 0.14
Oil and grease (for alternate monitoring). 15.3 5.09
------------------------------------------------------------------------

§ 464.26 Pretreatment standards for new sources.
top
Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources.

(a) Casting Quench Operations.

PSNS
------------------------------------------------------------------------
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).................................. 0.0307 0.0168
Lead (T).................................... 0.0211 0.0104
Zinc (T).................................... 0.0303 0.0116
TTO......................................... 0.0335 0.0109
Oil and grease (for alternate monitoring)... 1.2 0.399
------------------------------------------------------------------------

(b) Direct Chill Casting Operations.

PSNS
------------------------------------------------------------------------
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)................................ 0.928 0.506
Lead (T).................................. 0.639 0.314
Zinc (T).................................. 0.916 0.35
------------------------------------------------------------------------

(c) Dust Collection Scrubber Operations.

PSNS
------------------------------------------------------------------------
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)................................ 0.552 0.301
Lead (T).................................. 0.38 0.187
Zinc (T).................................. 0.545 0.208
Total Phenols............................. 0.617 0.215
TTO....................................... 1.65 0.54
Oil and Grease (for alternate monitoring.. 21.5 7.18
------------------------------------------------------------------------

(d) Grinding Scrubber Operations. No discharge of process wastewater pollutants to a POTW.

(e) Investment Casting.

PSNS
------------------------------------------------------------------------
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)................................... 5.84 2.86
Zinc (T)................................... 8.37 3.19
TTO........................................ 25.4 8.29
Oil and Grease (for alternate monitoring... 330 110
------------------------------------------------------------------------

(f) Melting Furnace Scrubber Operations.

PSNS
------------------------------------------------------------------------
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)................................ 1.81 0.988
Lead (T).................................. 1.25 0.612
Zinc (T).................................. 1.79 0.673 (continued)