View all text of Subpart C [§ 464.30 - § 464.37]

§ 464.32 - 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/1,000 kkg or lb/million lb of sand reclaimed; 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 limitations and annual average mass limitations shall only apply to non-continuous dischargers.

(a) Casting Cleaning Operations.

BPT Effluent Limitations

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)0.01290.0071 Lead (T)0.03530.0174 Zinc (T)0.06560.025 Oil and grease1.340.446 TSS1.70.67 pH( 1)( 1)

1 Within the range of 7.0 to 10.0 at all times.

Maximum for any 1 day Maximum for monthly average Annual average 1(mg/l) 2(mg/l) 2Copper (T)0.290.160.0029 Lead (T)0.790.390.0098 Zinc (T)1.470.560.0179 Oil and grease30100.223 TSS38150.446 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 (5.33/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

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)0.01380.0076 Lead (T)0.03760.0185 Zinc (T)0.06990.0266 Oil and grease1.430.476 TSS1.810.713 pH( 1)( 1)

1 Within the range of 7.0 to 10.0 at all times.

Maximum for any 1 day Maximum for monthly average Annual average 1(mg/l) 2(mg/l) 2Copper (T)0.290.160.0031 Lead (T)0.790.390.0105 Zinc (T)1.470.560.019 Oil and grease30100.238 TSS38150.476 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 (5.7/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) Dust Collection Scrubber Operations.

BPT Effluent Limitations

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)0.2180.12 Lead (T)0.5930.293 Zinc (T)1.10.421 Total phenols0.6560.225 Oil and grease22.57.51 TSS28.511.3 pH( 1)( 1)

1 Within the range of 7.0 to 10.0 at all times.

Maximum for any 1 day Maximum for monthly average Annual average 1(mg/l) 2(mg/l) 2(mg/l) 2Copper (T)0.290.160.0488 Lead (T)0.790.390.165 Zinc (T)1.470.560.3 Total phenols0.860.30.15 Oil and grease30103.76 TSS38157.51 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 (0.090/x) where x is the actual 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.

(d) Grinding Scrubber Operations. No discharge of process wastewater pollutants to navigable waters.

(e) Investment Casting.

BPT Effluent Limitations

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)3.191.76 Lead (T)8.74.3 Zinc (T)16.26.17 Oil and grease330110 TSS419165 pH( 1)( 1)

1 Within the range of 7.0 to 10.0 at all times.

Maximum for any 1 day Maximum for monthly average Annual average 1(mg/l) 2(mg/l) 2Copper (T)0.290.160.716 Lead (T)0.790.392.42 Zinc (T)1.470.564.41 Oil and grease301055.1 TSS3815110 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.

(f) Melting Furnace Scrubber Operations.

BPT Effluent Limitations

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)1.020.561 Lead (T)2.771.37 Zinc (T)5.151.96 Total phenols3.011.05 Oil and grease10535 TSS13352.6 pH( 1)( 1)

1Within the range of 7.0 to 10.0 at all times.

Maximum for any 1 day Maximum for monthly average Annual average 1(mg/l) 2(mg/l) 2Copper (T)0.290.160.228 Lead (T)0.790.390.771 Zinc (T)1.470.561.4 Total phenols0.860.30.701 Oil and grease301017.5 TSS381535 pH( 3)( 3)( 3)

1 kg/62.3 million Sm 3 (pounds per billion SCF) or air scrubbed.

2 These concentrations must be multiplied by the ratio of (0.42/x) where x is the actual 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.

(g) Mold Cooling Operations.

BPT Effluent Limitations

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)0.04280.0236 Lead (T)0.1170.0576 Zinc (T)0.2170.0827 Oil and grease4.431.48 TSS5.612.22 pH( 1)( 1)

1Within the range of 7.0 to 10.0 at all times.

Maximum for any 1 day Maximum for monthly average Annual average 1(mg/l) 2(mg/l) 2Copper (T)0.290.160.0096 Lead (T)0.790.390.0325 Zinc (T)1.470.560.0591 Oil and grease30100.738 TSS38151.48 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 (17.7/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

3Within the range of 7.0 to 10.0 at all times.

(h) Slag Quench Operations.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average kg/1,000 kkg (pounds per million pounds) of metal poured Cooper (T)0.05270.0291 Lead (T)0.1440.0709 Zinc (T)0.2670.102 Oil and grease5.461.82 TSS6.912.73 pH( 1)( 1)

1 Within the range 7.0 to 10.0 at all times.

Maximum for any 1 day Maximum for monthly average Annual average 1(mg/l) 2(mg/l) 2Copper (T)0.290.160.0118 Lead (T)0.790.390.04 Zinc (T)1.470.560.0728 Oil and grease30100.909 TSS38151.82 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 (21.8/x) where x is the actual normalized process wasterwater 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.

(i) Wet Sand Reclamation Operations.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average kg/1,000 kkg (pounds per million pounds) of sand reclaimed Cooper (T)0.2170.12 Lead (T)0.590.291 Zinc (T)1.10.418 Total phenols0.6420.224 Oil and grease22.47.47 TSS28.411.2 pH( 1)( 1)

1 Within the range of 7.0 to 10.0 at all times.

Maximum for any 1 day Maximum for monthly average Annual average 1(mg/l) 2(mg/l) 2Cooper (T)0.290.160.0485 Lead (T)0.790.390.164 Zinc (T)1.470.560.299 Total phenols0.860.30.149 Oil and grease30103.73 TSS38157.47 pH( 3)( 3)( 3)

1 kg/1,000 kkg (pounds per million pounds) of sand reclaimed.

2 These concentrations must be multiplied by the ratio of (89.5/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of sand reclaimed) 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 21761, June 16, 1986]