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/1,000 kkg or lb/million lb of sand reclaimed; 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 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).................................. 0.0129 0.0071Lead (T).................................... 0.0353 0.0174Zinc (T).................................... 0.0656 0.025Oil and grease.............................. 1.34 0.446TSS......................................... 1.7 0.67pH.......................................... (\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 0.0029Lead (T)............................. 0.79 0.39 0.0098Zinc (T)............................. 1.47 0.56 0.0179Oil and grease....................... 30 10 0.223TSS.................................. 38 15 0.446pH................................... (\3\) (\3\) (\3\)------------------------------------------------------------------------\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.\2\ These concentrations must be multiplied by the ratio (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.
(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).................................. 0.0138 0.0076Lead (T).................................... 0.0376 0.0185Zinc (T).................................... 0.0699 0.0266Oil and grease.............................. 1.43 0.476TSS......................................... 1.81 0.713pH.......................................... (\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 0.0031Lead (T)............................. 0.79 0.39 0.0105Zinc (T)............................. 1.47 0.56 0.019Oil and grease....................... 30 10 0.238TSS.................................. 38 15 0.476pH................................... (\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 (5.7/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.
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)................................ 0.218 0.12Lead (T).................................. 0.593 0.293Zinc (T).................................. 1.1 0.421Total phenols............................. 0.656 0.225Oil and grease............................ 22.5 7.51TSS....................................... 28.5 11.3pH........................................ (\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\ (mg/l)
\2\Copper (T)........................... 0.29 0.16 0.0488Lead (T)............................. 0.79 0.39 0.165Zinc (T)............................. 1.47 0.56 0.3Total phenols........................ 0.86 0.3 0.15Oil and grease....................... 30 10 3.76TSS.................................. 38 15 7.51pH................................... (\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 (0.090/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)................................ 3.19 1.76Lead (T).................................. 8.7 4.3Zinc (T).................................. 16.2 6.17Oil 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)......................... 0.29 0.16 0.716Lead (T)........................... 0.79 0.39 2.42Zinc (T)........................... 1.47 0.56 4.41Oil 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)................................ 1.02 0.561Lead (T).................................. 2.77 1.37Zinc (T).................................. 5.15 1.96Total phenols............................. 3.01 1.05Oil and grease............................ 105 35TSS....................................... 133 52.6pH........................................ (\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 0.228Lead (T)........................... 0.79 0.39 0.771Zinc (T)........................... 1.47 0.56 1.4Total phenols...................... 0.86 0.3 0.701Oil and grease..................... 30 10 17.5TSS................................ 38 15 35pH................................. (\3\) (\3\) (\3\)------------------------------------------------------------------------\1\ kg/62.3 million Sm\3\ (pounds per billion SCF) or 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.
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)................................ 0.0428 0.0236Lead (T).................................. 0.117 0.0576Zinc (T).................................. 0.217 0.0827Oil and grease............................ 4.43 1.48TSS....................................... 5.61 2.22pH........................................ (\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 0.0096Lead (T)............................. 0.79 0.39 0.0325Zinc (T)............................. 1.47 0.56 0.0591Oil and grease....................... 30 10 0.738TSS.................................. 38 15 1.48pH................................... (\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 (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.\3\Within the range of 7.0 to 10.0 at all times.
(h) Slag 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
---------------------------Cooper (T).................................. 0.0527 0.0291Lead (T).................................... 0.144 0.0709Zinc (T).................................... 0.267 0.102Oil and grease.............................. 5.46 1.82TSS......................................... 6.91 2.73pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range 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 0.0118Lead (T)............................. 0.79 0.39 0.04Zinc (T)............................. 1.47 0.56 0.0728Oil and grease....................... 30 10 0.909TSS.................................. 38 15 1.82pH................................... (\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 (21.8/x)
where x is the actual normalized process wasterwater 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.
(i) Wet Sand Reclamation 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 sand
reclaimed
-----------------------------Cooper (T)................................ 0.217 0.12Lead (T).................................. 0.59 0.291Zinc (T).................................. 1.1 0.418Total phenols............................. 0.642 0.224Oil and grease............................ 22.4 7.47TSS....................................... 28.4 11.2pH........................................ (\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\Cooper (T)........................... 0.29 0.16 0.0485Lead (T)............................. 0.79 0.39 0.164Zinc (T)............................. 1.47 0.56 0.299Total phenols........................ 0.86 0.3 0.149Oil and grease....................... 30 10 3.73TSS.................................. 38 15 7.47pH................................... (\3\) (\3\) (\3\)------------------------------------------------------------------------\1\ kg/1,000 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.\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]