[Code of Federal Regulations] [Title 40, Volume 27] [Revised as ofJuly 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR464.12] [Page 555-558] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 464--METAL MOLDING AND CASTING POINT SOURCE CATEGORY--Table of Contents Subpart A--Aluminum Casting Subcategory Sec. 464.12 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available. 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 Sm3 or lb/ billion SCF of air scrubbed) effluent limitations for copper, lead, zinc, total phenols, oil and grease, and TSS. For [[Page 556]] 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 0.0421 Lead (T).................................... 0.0791 0.039 Zinc (T).................................... 0.114 0.0431 Oil & grease................................ 3.0 1.0 TSS......................................... 3.80 1.50 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.0 to 10.00 at all times. ------------------------------------------------------------------------ Maximum Maximum for Annual for any 1 monthly average\1\ day average ------------------------------------------------------------------------ (mg/l)\2\ (mg/l)\2\ .......... Copper (T).......................... 0.77 0.42 0.017 Lead (T)............................ 0.79 0.39 0.022 Zinc (T)............................ 1.14 0.43 0.027 Oil & grease........................ 30 10 0.501 TSS................................. 38 15 1.0 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 (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 0.0051 Lead (T).................................... 0.0096 0.0047 Zinc (T).................................... 0.0138 0.0052 Oil & grease................................ 0.363 0.121 TSS......................................... 0.46 0.182 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.0 to 10.0 at all times. ------------------------------------------------------------------------ Maximum Maximum for Annual for any 1 monthly average\1\ day average ------------------------------------------------------------------------ (mg/l)\2\ (mg/l)\2\ .......... Copper (T).......................... 0.77 0.42 0.0021 Lead (T)............................ 0.79 0.39 0.0027 Zinc (T)............................ 1.14 0.43 0.0033 Oil & grease........................ 30 10 0.0605 TSS................................. 38 15 0.121 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 (1.45/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 0.0036 Lead (T).................................... 0.0068 0.0034 Zinc (T).................................... 0.0098 0.0037 Total Phenols............................... 0.0074 0.0026 Oil & Grease................................ 0.259 0.0864 TSS......................................... 0.33 0.13 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ With the range of 7.0 to 10.0 at all times. [[Page 557]] ------------------------------------------------------------------------ Maximum Maximum for Annual for any 1 monthly average\1\ day average ------------------------------------------------------------------------ (mg/l) (mg/l) (\2\) (\2\) Copper (T).......................... 0.77 0.42 0.0015 Lead (T)............................ 0.79 0.39 0.0019 Zinc (T)............................ 1.14 0.43 0.0023 Total Phenols....................... 0.86 0.3 0.0017 Oil & Grease........................ 30 10 0.0432 TSS................................. 38 15 0.0864 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 (1.04/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 0.126 Lead (T).................................... 0.237 0.117 Zinc (T).................................... 0.343 0.129 Total Phenols............................... 0.258 0.09 Oil & Grease................................ 9.01 3.0 TSS......................................... 11.4 4.51 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.0 to 10.0 at all times. ------------------------------------------------------------------------ Maximum Maximum for Annual for any 1 monthly average\1\ day average ------------------------------------------------------------------------ (mg/l)\2\ mg/ l)\2\ Copper (T)............................. 0.77 0.42 0.0511 Lead (T)............................... 0.79 0.39 0.0661 Zinc (T)............................... 1.14 0.43 0.0811 Total Phenols.......................... 0.86 0.3 0.0601 Oil & Grease........................... 30 10 1.5 TSS.................................... 38 15 3.0 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 (0.036/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 4.63 Lead (T).................................... 8.7 4.3 Zinc (T).................................... 12.6 4.74 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 Maximum for Annual for any 1 monthly average\1\ day average ------------------------------------------------------------------------ (mg/l)\2\ (mg/l)\2\ Copper (T).......................... 0.77 0.42 1.87 Lead (T)............................ 0.79 0.39 2.42 Zinc (T)............................ 1.14 0.43 2.97 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. (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 1.64 Lead (T).................................... 3.09 1.52 Zinc (T).................................... 4.45 1.68 Total phenols............................... 3.36 1.17 Oil and grease.............................. 117 39.1 TSS......................................... 148 58.6 pH.......................................... (\1\) (\1\) ------------------------------------------------------------------------ \1\ Within the range of 7.0 to 10.0 at all times. ------------------------------------------------------------------------ Maximum Maximum for Annual for any 1 monthly average \1\ day average ------------------------------------------------------------------------ (mg/l) \2\ (mg/l) \2\ Copper (T)......................... 0.77 0.42 0.664 Lead (T)........................... 0.79 0.39 0.859 Zinc (T)........................... 1.14 0.43 1.05 Total phenols...................... 0.86 0.3 0.781 Oil and grease..................... 30 10 19.5 TSS................................ 38 15 39.1 pH................................. (\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. [[Page 558]] \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 0.162 Lead (T).................................... 0.305 0.151 Zinc (T).................................... 0.44 0.166 Oil and grease.............................. 11.6 3.86 TSS......................................... 14.7 5.79 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 \1\ ------------------------------------------------------------------------ (mg/l) \1\ (mg/) \1\ ........... Copper (T)..................... 0.77 0.42 0.0656 Lead (T)....................... 0.79 0.39 0.0849 Zinc (T)....................... 1.14 0.43 0.104 Oil and grease................. 30 10 1.93 TSS............................ 38 15 3.86 pH............................. (\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]