Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available, except that non-continuous dischargers shall not be subject to the maximum day and maximum for monthly average mass (kg/1,000 kkg or lb/million lb of metal poured; kg/62.3 million Sm\3\ or lb/billion SCF of air scrubbed) effluent limitations for copper, lead, zinc, total phenols, oil and grease, and TSS. For non-continuous dischargers, annual average mass limitations and maximum day and maximum for monthly average concentration (mg/l) limitations shall apply. Concentration limitation and annual average mass limitation shall only apply to non-continuous dischargers.
(a) Casting Cleaning Operations.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
kg/1,000 kkg (pounds per
million pounds) of metal
poured
---------------------------Copper (T).................................. 0.0771 0.0421Lead (T).................................... 0.0791 0.039Zinc (T).................................... 0.114 0.0431Oil & grease................................ 3.0 1.0TSS......................................... 3.80 1.50pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10.00 at all times. ------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\------------------------------------------------------------------------
(mg/l)\2\ (mg/l)\2\Copper (T)............................ 0.77 0.42 0.017Lead (T).............................. 0.79 0.39 0.022Zinc (T).............................. 1.14 0.43 0.027Oil & grease.......................... 30 10 0.501TSS................................... 38 15 1.0pH.................................... (\3\) (\3\) (\3\)------------------------------------------------------------------------\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.\2\ These concentrations must be multiplied by the ratio of (12/x) where
x is the actual normalized process wastewater flow (in gallons per
1,000 pounds of metal poured) for a specific plant.\3\ Within the range of 7.0 to 10.0 at all times.
(b) Casting Quench Operations.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
kg/1,000 kkg (pounds per
million pounds) of metal
poured
---------------------------Copper (T).................................. 0.0093 0.0051Lead (T).................................... 0.0096 0.0047Zinc (T).................................... 0.0138 0.0052Oil & grease................................ 0.363 0.121TSS......................................... 0.46 0.182pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10.0 at all times. ------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\------------------------------------------------------------------------
(mg/l)\2\ (mg/l)\2\Copper (T).......................... 0.77 0.42 0.0021Lead (T)............................ 0.79 0.39 0.0027Zinc (T)............................ 1.14 0.43 0.0033Oil & grease........................ 30 10 0.0605TSS................................. 38 15 0.121pH.................................. (\3\) (\3\) (\3\)------------------------------------------------------------------------\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.\2\ These concentrations must be multiplied by the ratio of (1.45/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 pounds of metal poured) for a specific plant.\3\ Within the range of 7.0 to 10.0 at all times.
(c) Die Casting Operations.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
kg/1,000 kkg (pounds per
million pounds) of metal
poured
---------------------------
Copper (T).................................. 0.0066 0.0036Lead (T).................................... 0.0068 0.0034Zinc (T).................................... 0.0098 0.0037Total Phenols............................... 0.0074 0.0026Oil & Grease................................ 0.259 0.0864TSS......................................... 0.33 0.13pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ With the range of 7.0 to 10.0 at all times. ------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\------------------------------------------------------------------------
(mg/l) (mg/l)
(\2\) (\2\)Copper (T).......................... 0.77 0.42 0.0015Lead (T)............................ 0.79 0.39 0.0019Zinc (T)............................ 1.14 0.43 0.0023Total Phenols....................... 0.86 0.3 0.0017Oil & Grease........................ 30 10 0.0432TSS................................. 38 15 0.0864pH.................................. (\3\) (\3\) (\3\)------------------------------------------------------------------------\1\ kg/1,000 kkg (pounds per million pounds) of metal poured.\2\ These concentrations must be multiplied by the ratio of (1.04/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 pounds of metal poured) for a specific plant.\3\ Within the range of 7.0 to 10.0 at all times,
(d) Dust Collection Scrubber Operations.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
kg/62.3 million Sm\3\
(pounds per billion SCF)
of air scrubbed
---------------------------
Copper (T).................................. 0.231 0.126Lead (T).................................... 0.237 0.117Zinc (T).................................... 0.343 0.129Total Phenols............................... 0.258 0.09Oil & Grease................................ 9.01 3.0TSS......................................... 11.4 4.51pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10.0 at all times. ------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\------------------------------------------------------------------------
(mg/l)\2\ mg/
l)\2\Copper (T)............................. 0.77 0.42 0.0511Lead (T)............................... 0.79 0.39 0.0661Zinc (T)............................... 1.14 0.43 0.0811Total Phenols.......................... 0.86 0.3 0.0601Oil & Grease........................... 30 10 1.5TSS.................................... 38 15 3.0pH..................................... (\3\) (\3\) (\3\)------------------------------------------------------------------------\1\ kg/62.3 million SM\3\ (pounds per billion SCF) of air scrubbed.\2\ These concentrations must be multiplied by the ratio of (0.036/x)
where x is the actual normalized process waste-water flow (in gallons
per 1,000 SCF of air scrubbed) for a specific plant.\3\ Within the range of 7.0 to 10.0 at all times.
(e) Grinding Scrubber Operations. No discharge of process wastewater pollutants to navigable waters.
(f) Investment Casting.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
kg/1,000 kkg (pounds per
million pounds) of metal
poured
---------------------------Copper (T).................................. 8.48 4.63Lead (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
Maximum for Annual
for any 1 monthly average
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.
(g) Melting Furnace Scrubber Operations.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
kg/62.3 million Sm\3\
(pounds per billion SCF)
of air scrubbed
---------------------------Copper (T).................................. 3.01 1.64Lead (T).................................... 3.09 1.52Zinc (T).................................... 4.45 1.68Total phenols............................... 3.36 1.17Oil and grease.............................. 117 39.1TSS......................................... 148 58.6pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10.0 at all times. ------------------------------------------------------------------------
Maximum
Maximum for Annual
for any 1 monthly average
day average \1\------------------------------------------------------------------------
(mg/l) \2\ (mg/l) \2\Copper (T)............................ 0.77 0.42 0.664Lead (T).............................. 0.79 0.39 0.859Zinc (T).............................. 1.14 0.43 1.05Total phenols......................... 0.86 0.3 0.781Oil and grease........................ 30 10 19.5TSS................................... 38 15 39.1pH.................................... (\2\) (\3\) (\3\)------------------------------------------------------------------------\1\ kg/62.3 million Sm\3\ (pounds per billion SCF) of air scrubbed.\2\ These concentrations must be multiplied by the ratio of (0.468/x)
where x is the acutal normalized process wastewater flow (in gallons
per 1,000 SCF of air scrubbed) for a specific plant.\3\ Within the range of 7.0 to 10.0 at all times.
(h) Mold Cooling Operations.
BPT Effluent Limitations------------------------------------------------------------------------
Maximum for
Pollutant or pollutant property Maximum for monthly
any 1 day average------------------------------------------------------------------------
kg/1,000 kkg (pounds per
million pounds) of metal
poured
---------------------------Copper (T).................................. 0.297 0.162Lead (T).................................... 0.305 0.151Zinc (T).................................... 0.44 0.166Oil and grease.............................. 11.6 3.86TSS......................................... 14.7 5.79pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10.0 at all times. ------------------------------------------------------------------------
Maximum for
Maximum for monthly Annual
any 1 day average average \1\------------------------------------------------------------------------
(mg/l) \1\ (mg/) \1\Copper (T)..................... 0.77 0.42 0.0656Lead (T)....................... 0.79 0.39 0.0849Zinc (T)....................... 1.14 0.43 0.104Oil and grease................. 30 10 1.93TSS............................ 38 15 3.86pH............................. (\3\) (\3\) (\3\)------------------------------------------------------------------------\1\ kg/1,000 kkg (pounds per million pounds) of metal\2\ These concentrations must be multiplied by the ratio of (46.3/x)
where x is the actual normalized process wastewater flow (in gallons
per 1,000 pounds of metal poured) for a specific plant.\3\ Within the range of 7.0 to 10.0 at all times. [50 FR 45247, Oct. 30, 1985; 51 FR 21760, June 16, 1986]