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429.21—Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).
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 (BPT):
(a)
The following limitations apply to all mechanical barking installations: There shall be no discharge of process wastewater pollutants into navigable waters.
(b)
The following limitations constitute the maximum permissible discharge for hydraulic barking installations:
| Pollutant or pollutant property | BPT effluent limitations | |
|---|---|---|
| Maximum for any 1 day | Average of daily values for 30 consecutive days | |
| Metric units (kilograms per cubic meter of production) | ||
| BOD5 | 1.5 | 0.5 |
| TSS | 6.9 | 2.3 |
| pH | (1) | (1) |
| English units (pounds per cubic foot of production) | ||
| BOD5 | 0.09 | 0.03 |
| TSS | 0.431 | 0.144 |
| pH | (1) | (1) |
| 1 Within the range 6.0 to 9.0 at all times. | ||
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 (BPT):
(a)
The following limitations apply to all mechanical barking installations: There shall be no discharge of process wastewater pollutants into navigable waters.
(b)
The following limitations constitute the maximum permissible discharge for hydraulic barking installations:
| Pollutant or pollutant property | BPT effluent limitations | |
|---|---|---|
| Maximum for any 1 day | Average of daily values for 30 consecutive days | |
| Metric units (kilograms per cubic meter of production) | ||
| BOD5 | 1.5 | 0.5 |
| TSS | 6.9 | 2.3 |
| pH | (1) | (1) |
| English units (pounds per cubic foot of production) | ||
| BOD5 | 0.09 | 0.03 |
| TSS | 0.431 | 0.144 |
| pH | (1) | (1) |
| 1 Within the range 6.0 to 9.0 at all times. | ||
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