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 limitations and annual average mass limitations shall only apply to non-continuous dischargers.
(a) 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).................................. 0.0307 0.0168Lead (T).................................... 0.0315 0.0156Zinc (T).................................... 0.0455 0.0171Oil and grease.............................. 1.2 0.399TSS......................................... 1.52 0.598pH.......................................... (\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 0.0068Lead (T)........................... 0.79 0.39 0.0088Zinc (T)........................... 1.14 0.43 0.0108Oil and grease..................... 30 10 0.199TSS................................ 38 15 0.399pH................................. (\3\) (\3\) (\3\)------------------------------------------------------------------------\1\ kg/1000 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.
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)................................ 0.928 0.506Lead (T).................................. 0.952 0.47Zinc (T).................................. 1.37 0.518Oil and grease............................ 36.2 12.1TSS....................................... 45.8 18.1pH........................................ (\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 0.205Lead (T)........................... 0.79 0.39 0.265Zinc (T)........................... 1.14 0.43 0.326Oil and grease..................... 30 10 6.03TSS................................ 38 15 12.1pH................................. (\3\) (\3\) (\3\)------------------------------------------------------------------------\1\ kg/1000 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.
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)................................ 0.553 0.301Lead (T).................................. 0.567 0.28Zinc (T).................................. 0.818 0.309Total phenols............................. 0.617 0.215Oil and grease............................ 21.5 7.18TSS....................................... 27.3 10.8ph........................................ (\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 0.122Lead (T)........................... 0.79 0.39 0.158Zinc (T)........................... 1.14 0.43 0.194Total phenols...................... 0.86 0.3 0.144Oil and grease..................... 30 10 3.59TSS................................ 38 15 7.18pH................................. (\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.
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 4.63Lead (T).................................. 8.7 4.3Zinc (T).................................. 12.6 4.74Oil and grease............................ 330 110TSS....................................... 419 165pH........................................ (\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 1.87Lead (T)........................... 0.79 0.39 2.42Zinc (T)........................... 1.14 0.43 2.97Oil and grease..................... 30 10 55.1TSS................................ 38 15 110pH................................. (\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.
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)................................ 1.81 0.988Lead (T).................................. 1.86 0.918Zinc (T).................................. 2.68 1.01Total phenols............................. 2.02 0.706Oil and grease............................ 70.6 23.5TSS....................................... 89.4 35.3pH........................................ (\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 0.4Lead (T)........................... 0.79 0.39 0.518Zinc (T)........................... 1.14 0.43 0.635Total phenols...................... 0.86 0.3 0.467Oil and grease..................... 30 10 11.8TSS................................ 38 15 23.5pH................................. (\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 0.214Lead (T).................................. 0.402 0.199Zinc (T).................................. 0.58 0.219Oil and grease............................ 15.3 5.09TSS....................................... 19.3 7.63pH........................................ (\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 0.0865Lead (T)........................... 0.79 0.39 0.112Zinc (T)........................... 1.14 0.43 0.137Oil and grease..................... 30 10 2.54TSS................................ 38 15 5.09pH................................. (\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]