Any new source subject to this subpart must achieve the following new source performance standards (NSPS), 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 Sm3 or lb/billion SCF of air scrubbed) effluent standards for copper, lead, zinc, total phenols, oil and grease, and TSS. For non-continuous dischargers, annual average mass standards and maximum day and maximum for monthly average concentration (mg/l) standards shall apply. Concentration standards and annual average mass standards shall only apply to non-continuous dischargers.
(a) Casting Cleaning Operations.
(1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.
NSPS
| 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) | 0.0129 | 0.0071 |
| Lead (T) | 0.0237 | 0.0116 |
| Zinc (T) | 0.0437 | 0.0165 |
| Oil and grease | 1.34 | 0.446 |
| TSS | 0.67 | 0.536 |
| 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 average1 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.29 | 0.16 | 0.0029 |
| Lead (T) | 0.53 | 0.26 | 0.0067 |
| Zinc (T) | 0.98 | 0.37 | 0.0116 |
| Oil and grease | 30 | 10 | 0.223 |
| TTS | 15 | 12 | 0.116 |
| pH | (3) | (3) | (3) |
1kg/1000 kkg (pounds per million pounds) of metal poured.
2These concentrations must be multiplied by the ratio of (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.
3Within the range of 7.0 to 10.0 at all times.
(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.
NSPS
| 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) | 0.0129 | 0.0071 |
| Lead (T) | 0.0353 | 0.0174 |
| Zinc (T) | 0.0656 | 0.025 |
| Oil and grease | 1.34 | 0.446 |
| TSS | 1.7 | 0.67 |
| 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 average1 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.29 | 0.16 | 0.0029 |
| Lead (T) | 0.79 | 0.39 | 0.0098 |
| Zinc (T) | 1.47 | 0.56 | 0.0179 |
| Oil and grease | 30 | 10 | 0.223 |
| TTS | 38 | 15 | 0.446 |
| pH | (3) | (3) | (3) |
1kg/1,000 kkg (pounds per million pounds) of metal poured.
2These concentrations must be multiplied by the ratio of (5.35/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.
(b) Casting Quench Operations.
(1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.
NSPS
| 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) | 0.0138 | 0.0076 |
| Lead (T) | 0.0252 | 0.0124 |
| Zinc (T) | 0.0466 | 0.0176 |
| Oil and grease | 1.43 | 0.476 |
| TSS | 0.713 | 0.571 |
| 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 average1 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.29 | 0.16 | 0.0031 |
| Lead (T) | 0.53 | 0.26 | 0.0071 |
| Zinc (T) | 0.98 | 0.37 | 0.0124 |
| Oil and grease | 30 | 10 | 0.238 |
| TSS | 15 | 12 | 0.124 |
| pH | (3) | (3) | (3) |
1Kg/1000 kkg (pounds per million pounds) of metal poured.
2Within the range of 7.0 to 10.0 at all times.
3These 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.
(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.
NSPS
| 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) | 0.0138 | 0.0076 |
| Lead (T) | 0.0376 | 0.0185 |
| Zinc (T) | 0.0699 | 0.0266 |
| Oil and grease | 1.43 | 0.476 |
| TSS | 1.81 | 0.713 |
| 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 average1 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.29 | 0.16 | 0.0031 |
| Lead (T) | 0.79 | 0.39 | 0.0105 |
| Zinc (T) | 1.47 | 0.56 | 0.019 |
| Oil and grease | 30 | 10 | 0.238 |
| TSS | 38 | 15 | 0.476 |
| pH | (3) | (3) | (3) |
1Kg/1000 kkg (pounds per million pounds) of metal poured.
2These 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.
3Within the range of 7.0 to 10.0 at all times.
(c) Dust Collection Scrubber Operations.
(1) Applicable to plants that are casting primarily ductible or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| kg/62.3 million Sm3 (pounds per billion SCF) of air scrubbed | ||
| Copper (T) | 0.218 | 0.12 |
| Lead (T) | 0.398 | 0.195 |
| Zinc (T) | 0.736 | 0.278 |
| Total Phenols | 0.646 | 0.225 |
| Oil and grease | 22.5 | 7.51 |
| TSS | 11.3 | 9.01 |
| 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 average1 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.29 | 0.16 | 0.0488 |
| Lead (T) | 0.53 | 0.26 | 0.113 |
| Zinc (T) | 0.98 | 0.37 | 0.195 |
| Total phenols | 0.86 | 0.3 | 0.15 |
| Oil and grease | 30 | 10 | 3.76 |
| TSS | 15 | 12 | 1.95 |
| pH | (3) | (3) | (3) |
1kg/62.3 millions Sm3 (pound per billion SCF) of air scrubbed.
2Within the range of 7.0 to 10.0 at all times.
3These concentrations must be multiplied by the ratio of (0.09/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.
(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| kg/62.3 million Sm3 (pounds per billion SCF) of air scrubbed | ||
| Copper (T) | 0.218 | 0.12 |
| Lead (T) | 0.593 | 0.293 |
| Zinc (T) | 1.1 | 0.421 |
| Total phenols | 0.656 | 0.225 |
| Oil and grease | 22.5 | 7.51 |
| TSS | 28.5 | 11.3 |
| 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 average1 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.29 | 0.16 | 0.0488 |
| Lead (T) | 0.79 | 0.39 | 0.165 |
| Zinc (T) | 1.47 | 0.56 | 0.3 |
| Total phenols | 0.86 | 0.3 | 0.15 |
| Oil and grease | 30 | 10 | 3.76 |
| TSS | 38 | 15 | 7.51 |
| pH | (3) | (3) | (3) |
1kg/62.3 millions Sm3 (pound per billion SCF) of air scrubbed.
2Within the range of 7.0 to 10.0 at all times.
3These concentrations must be multiplied by the ratio of (0.09/) where 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.
(1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.
NSPS
| 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) | 3.19 | 1.76 |
| Lead (T) | 5.84 | 2.86 |
| Zinc (T) | 10.8 | 4.07 |
| Oil and grease | 330 | 110 |
| TSS | 165 | 132 |
| 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 average1 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.29 | 0.16 | 0.716 |
| Lead (T) | 0.53 | 0.26 | 1.65 |
| Zinc (T) | 0.98 | 0.37 | 2.86 |
| Oil and grease | 30 | 10 | 55.1 |
| TSS | 15 | 12 | 28.6 |
| pH | (3) | (3) | (3) |
1kg/1,000 kkg (pounds per million pounds) of metal poured.
2These 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.
3Within the range of 7.0 to 10.0 at all times.
(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.
NSPS
| 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) | 3.19 | 1.76 |
| Lead (T) | 8.7 | 4.3 |
| Zinc (T) | 16.2 | 6.17 |
| Oil and grease | 330 | 110 |
| TSS | 419 | 165 |
| 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 average1 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.29 | 0.16 | 0.716 |
| Lead (T) | 0.79 | 0.39 | 2.42 |
| Zinc (T) | 1.47 | 0.56 | 4.41 |
| Oil and grease | 30 | 10 | 55.1 |
| TSS | 38 | 15 | 110 |
| pH | (3) | (3) | (3) |
1kg/1,000 kkg (pounds per million pounds) of metal poured.
2These 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.
3Within the range of 7.0 to 10.0 at all times.
(f) Melting Furnace Scrubber Operations.
(1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| kg/62.3 million Sm3 (pounds per billion SCF) of air scrubbed | ||
| Copper (T) | 1.02 | 0.561 |
| Lead (T) | 1.86 | 0.911 |
| Zinc (T) | 3.44 | 1.30 |
| Total phenols | 3.01 | 1.05 |
| Oil and grease | 105 | 35 |
| TSS | 52.6 | 42.1 |
| 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 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.29 | 0.16 | 0.228 |
| Lead (T) | 0.53 | 0.26 | 0.526 |
| Zinc (T) | 0.98 | 0.37 | 0.911 |
| Total phenols | 0.86 | 0.3 | 0.701 |
| Oil and grease | 30 | 10 | 17.5 |
| TSS | 15 | 12 | 9.11 |
| pH | (3) | (3) | (3) |
1kg/62.3 million Sm3 (pounds per billion SCF) of air scrubbed.
2These 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.
3Within the range of 7.0 to 10.0 at all times.
(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| kg/62.3 million Sm3 (pounds per billion SCF) of air scrubbed | ||
| Copper (T) | 1.02 | 0.561 |
| Lead (T) | 2.77 | 1.37 |
| Zinc (T) | 5.15 | 1.96 |
| Total phenols | 3.01 | 1.05 |
| Oil and grease | 105 | 35 |
| TSS | 133 | 52.6 |
| 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 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.29 | 0.16 | 0.228 |
| Lead (T) | 0.79 | 0.39 | 0.771 |
| Zinc (T) | 1.47 | 0.56 | 1.4 |
| Total phenols | 0.38 | 0.3 | 0.701 |
| Oil and grease | 30 | 10 | 17.5 |
| TSS | 38 | 15 | 35 |
| pH | (3) | (3) | (3) |
1kg/62.3 million Sm3 (pounds per billion SCF) of air scrubbed.
2These 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.
3Within the range of 7.0 to 10.0 at all times.
(g) Mold Cooling Operations.
(1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.
NSPS
| 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) | 0.0428 | 0.0236 |
| Lead (T) | 0.0783 | 0.0384 |
| Zinc (T) | 0.0145 | 0.0546 |
| Oil and grease | 4.43 | 1.48 |
| TSS | 2.22 | 1.77 |
| 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 average1 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)1 | ||
| Copper (T) | 0.29 | 0.16 | 0.0096 |
| Lead (T) | 0.53 | 0.26 | 0.0222 |
| Zinc (T) | 0.98 | 0.37 | 0.0384 |
| Oil and grease | 30 | 10 | 0.738 |
| TSS | 15 | 12 | 0.384 |
| pH | (3) | (3) | (3) |
1kg/1,000 kkg (pounds per million) pounds of metal poured.
2These 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.
(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.
NSPS
| 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) | 0.0428 | 0.0236 |
| Lead (T) | 0.117 | 0.0576 |
| Zinc (T) | 0.217 | 0.0827 |
| Oil and grease | 4.43 | 1.48 |
| TSS | 5.61 | 2.22 |
| pH | (1) | (1) |
1Within the range of 7.0 to 10.0 at all times.
| Maximum for any 1 day | Maxium for monthly average | Annual average1 | |
|---|---|---|---|
| (mg/1)2 | (mg/l)2 | ||
| Copper (T) | 0.29 | 0.16 | 0.0096 |
| Lead (T) | 0.79 | 0.39 | 0.0325 |
| Zinc (T) | 1.47 | 0.56 | 0.0591 |
| Oil and grease | 30 | 10 | 0.738 |
| TSS | 38 | 15 | 1.48 |
| pH | (3) | (3) | (3) |
1kg/1,000 kkg (pounds per million) pounds of metal poured.
2These 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.
(1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.
NSPS
| 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) | 0.0527 | 0.0291 |
| Lead (T) | 0.0964 | 0.0473 |
| Zinc (T) | 0.178 | 0.0673 |
| Oil and grease | 5.46 | 1.82 |
| TSS | 2.73 | 2.18 |
| 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 average1 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.29 | 0.16 | 0.0118 |
| Lead (T) | 0.53 | 0.26 | 0.0273 |
| Zinc (T) | 0.98 | 0.37 | 0.0473 |
| Oil and grease | 30 | 10 | 0.909 |
| TSS | 15 | 12 | 0.473 |
| pH | (3) | (3) | (3) |
1kg/1,000 kkg (pounds per million pounds) of metal poured.
2These concentrations must be multiplied by the ratio of (21.8/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.
(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.
NSPS
| 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) | 0.0527 | 0.0291 |
| Lead (T) | 0.144 | 0.0709 |
| Zinc (T) | 0.267 | 0.102 |
| Oil and grease | 5.46 | 1.82 |
| TSS | 6.91 | 2.73 |
| 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 | |
|---|---|---|---|
| (mg/l)2 | (mg/1)2 | ||
| Copper (T) | 0.29 | 0.16 | 0.0118 |
| Lead (T) | 0.79 | 0.39 | 0.04 |
| Zinc (T) | 1.47 | 0.56 | 0.0728 |
| Oil and grease | 30 | 10 | 0.909 |
| TSS | 38 | 15 | 1.82 |
| pH | (3) | (3) | (3) |
1kg/1000 kkg (pounds per million pounds) of metal poured.
2These concentrations must be multiplied by the ratio of (21.8/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.
(i) Wet Sand Reclamation Operations.
(1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| kg/1,000 kkg (pounds per million pounds) of sand reclaimed | ||
| Copper (T) | 0.217 | 0.12 |
| Lead (T) | 0.396 | 0.194 |
| Zinc (T) | 0.732 | 0.276 |
| Total phenols | 0.642 | 0.224 |
| Oil and grease | 22.4 | 7.47 |
| TSS | 11.2 | 8.96 |
| 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 average1 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.29 | 0.16 | 0.0485 |
| Lead (T) | 0.53 | 0.26 | 0.112 |
| Zinc (T) | 0.98 | 0.37 | 0.194 |
| Total phenols | 0.86 | 0.3 | 0.149 |
| Oil and grease | 30 | 10 | 3.73 |
| TSS | 15 | 12 | 1.94 |
| pH | (3) | (3) | (3) |
1kg/1,000 kkg (pounds per million pounds) of sand reclaimed.
2These 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.
3Within the range of 7.0 to 10.0 at all times.
(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| kg/1,000 kkg (pounds per million pounds) of sand reclaimed | ||
| Copper (T) | 0.217 | 0.12 |
| Lead (T) | 0.59 | 0.291 |
| Zinc (T) | 1.1 | 0.418 |
| Total phenols | 0.642 | 0.224 |
| Oil and grease | 22.4 | 7.47 |
| TSS | 28.4 | 11.2 |
| pH | (1) | (1) |
1Within the range of 7.0 to at all times.
| Maximum for any 1 day | Maximum for monthly average | Annual average1 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.29 | 0.16 | 0.0485 |
| Lead (T) | 0.79 | 0.39 | 0.164 |
| Zinc (T) | 1.47 | 0.56 | 0.299 |
| Total phenols | 0.86 | 0.3 | 0.149 |
| Oil and grease | 30 | 10 | 3.73 |
| TSS | 38 | 15 | 7.47 |
| pH | (3) | (3) | (3) |
1kg/1,000 kkg (pounds per million pounds) of sand reclaimed.
2These 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.
3Within the range of 7.0 to 10.0 at all times.
[50 FR 45247, Oct. 30, 1985; 51 FR 21761, June 16, 1986]
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