[Code of Federal Regulations] [Title 40, Volume 29] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR464.23] [Page 566-567] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 464_METAL MOLDING AND CASTING POINT SOURCE CATEGORY --Table of Contents Subpart B_Copper Casting Subcategory Sec. 464.23 Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable. 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. [[Page 567]] \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]