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Ship Building And Repairing, Ketchikan, Alaska. NPDES permit AK0045675 expired Mar 31, 2023; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 001 |
| pH | instantaneous maximum | ≤ 8.5 SU | all year | 001 |
| Oil & Grease | monthly average | ≤ 10 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 001 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 001 |
| Zinc, total recoverable | maximum | report only (ug/L) | all year | 001 |
| Copper, total recoverable | monthly average | ≤ 497 ug/L | all year | 001 |
| Copper, total recoverable | daily maximum | ≤ 1170 ug/L | all year | 001 |
| Tributyltin | monthly average | report only (ug/L) | all year | 001 |
| Tributyltin | daily maximum | report only (ug/L) | all year | 001 |
| Hydrocarbons, aromatic | monthly average | report only (ug/L) | all year | 001 |
| Hydrocarbons, aromatic | daily maximum | report only (ug/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 001 |
| Hydrocarbon, aqueous | monthly average | report only (ug/L) | all year | 001 |
| Hydrocarbon, aqueous | daily maximum | report only (ug/L) | all year | 001 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 001 |
| Oil & Grease | monthly average | ≤ 10 mg/L | all year | 002 |
| Oil & Grease | monthly average | ≤ 10 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 002 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 002 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 002 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 003 |
| pH | instantaneous minimum | ≥ 6.5 SU | all year | 003 |
| pH | instantaneous maximum | ≤ 8.5 SU | all year | 003 |
| pH | instantaneous maximum | ≤ 8.5 SU | all year | 003 |
| Oil & Grease | monthly average | ≤ 10 mg/L | all year | 003 |
| Oil & Grease | monthly average | ≤ 10 mg/L | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Zinc, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Zinc, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Copper, total recoverable | monthly average | report only (ug/L) | all year | 003 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Copper, total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Hydrocarbons, aromatic | monthly average | report only (ug/L) | all year | 003 |
| Hydrocarbons, aromatic | monthly average | report only (ug/L) | all year | 003 |
| Hydrocarbons, aromatic | daily maximum | report only (ug/L) | all year | 003 |
| Hydrocarbons, aromatic | daily maximum | report only (ug/L) | all year | 003 |
| Hydrocarbon, aqueous | monthly average | report only (ug/L) | all year | 003 |
| Hydrocarbon, aqueous | monthly average | report only (ug/L) | all year | 003 |
| Hydrocarbon, aqueous | daily maximum | report only (ug/L) | all year | 003 |
| Hydrocarbon, aqueous | daily maximum | report only (ug/L) | all year | 003 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 003 |
| Oil and grease visual | daily maximum | ≤ 0 N=0;Y=1 | all year | 003 |
Cited limits by parameter: Alaska's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/AK0045675 · MCP: https://passage-data.com/mcp