[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: 40CFR464.43] [Page 593-594] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 464_METAL MOLDING AND CASTING POINT SOURCE CATEGORY --Table of Contents Subpart D_Zinc Casting Subcategory Sec. 464.43 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 dischargers, annual average mass limitations and maximum day and maximum for monthly average concentration (mg/1) 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).................................. 0.0344 0.0187 Lead (T).................................... 0.0237 0.0116 Zinc (T).................................... 0.0339 0.0129 ------------------------------------------------------------------------ [[Page 594]] ------------------------------------------------------------------------ Maximum for Annual Maximum for monthly average any 1 day average \1\ ------------------------------------------------------------------------ (mg/l) \2\ (mg/l) \2\ Copper (T)........................... 0.77 0.42 0.0076 Lead (T)............................. 0.53 0.26 0.0067 Zinc (T)............................. 0.76 0.29 0.008 ------------------------------------------------------------------------ \1\ kg/1,000 kkg (pounds per million pounds) of metal poured. \2\ These concentrations must be multiplied by the ratio of (5.34/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant. (b) Die 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).................................. 0.0066 0.0036 Lead (T).................................... 0.0046 0.0022 Zinc (T).................................... 0.0066 0.0025 Total phenols............................... 0.0074 0.0026 ------------------------------------------------------------------------ ------------------------------------------------------------------------ Maximum for Annual Maximum for monthly average any 1 day average \1\ ------------------------------------------------------------------------ (mg/l) \2\ (mg/l) \2\ Copper (T)........................... 0.77 0.42 0.0015 Lead (T)............................. 0.53 0.26 0.0013 Zinc (T)............................. 0.76 0.29 0.0016 Total phenols........................ 0.86 0.3 0.0017 ------------------------------------------------------------------------ \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. (c) 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)................................ 1.56 0.852 Lead (T).................................. 1.07 0.527 Zinc (T).................................. 1.54 0.588 Total phenolse............................ 1.74 0.608 ------------------------------------------------------------------------ ------------------------------------------------------------------------ Maximum for Annual Maximum for monthly average any 1 day average \1\ ------------------------------------------------------------------------ (mg/l) \2\ (mg/l) \2\ Copper (T)......................... 0.77 0.42 0.345 Lead (T)........................... 0.53 0.26 0.304 Zinc (T)........................... 0.76 0.29 0.365 Total phenols...................... 0.86 0.3 0.406 ------------------------------------------------------------------------ \1\ kg/62.3 million Sm \3\ (pounds per billion SCF) of air scrubbed. \2\ These concentrations must be multiplied by the ratio of (0.243/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant. (d) 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).................................. 0.304 0.166 Lead (T).................................... 0.209 0.103 Zinc (T).................................... 0.3 0.114 ------------------------------------------------------------------------ ------------------------------------------------------------------------ Maximum Maximum for Annual for any 1 monthly average day average \1\ ------------------------------------------------------------------------ (mg/l)\2\ (mg/l)\2\ Copper (T)............................ 0.77 0.42 0.067 Lead (T).............................. 0.53 0.26 0.0591 Zinc (T).............................. 0.76 0.29 0.071 ------------------------------------------------------------------------ \1\ kg/1,000 kkg (pounds per million pounds) of metal poured. \2\ These concentrations must be multiplied by the ratio of (47.3/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 21762, June 16, 1986]