Pretreatment standards for existing sources.

Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources. (a) Casting Quench Operations. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average kg/1000 kkg (pounds per million pounds) of metal poured Copper (T) 0.0307 0.0168 Lead (T) 0.0211 0.0104 Zinc (T) 0.0303 0.0116 TTO 0.0335 0.0109 Oil and grease (for alternate monitoring) 1.2 0.399 (b) Direct Chill Casting Operations. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 (c) Dust Collection Scrubber Operations. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed Copper (T) 0.552 0.301 Lead (T) 0.38 0.187 Zinc (T) 0.545 0.208 Total phenols 0.617 0.215 TTO 1.65 0.54 Oil and grease (for alternate monitoring) 21.5 7.18 (d) Grinding Scrubber Operations. No discharge of process wastewater pollutants to a POTW. (e) Investment Casting. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average kg/1,000 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 TTO 25.4 8.29 Oil and grease for alternate monitoring) 330 110 (f) Melting Furnace Scrubber Operations. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 TTO 5.41 1.77 Oil and grease (for alternate monitoring) 70.6 23.5 (g) Mold Cooling Operations. PSES Pollutant or pollutant property Maximum for any 1 day Maximum for monthly 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 TTO 0.428 0.14 Oil and grease (for alternate monitoring) 15.3 5.09