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Wood Preserving, Hillsboro, Oregon. NPDES permit OR0039594 expired Oct 31, 2015; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | daily minimum | ≥ 6.5 SU | all year |
| pH | daily maximum | ≤ 8.5 SU | all year |
| Solids, total suspended | annual average | report only (mg/L) | all year |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year |
| Hardness, total [as CaCO3] | annual average | report only (mg/L) | all year |
| Chromium, hexavalent [as Cr] | daily maximum | report only (ug/L) | all year |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year |
| Copper, total recoverable | daily maximum | ≤ .043 mg/L | all year |
| Pentachlorophenol | daily maximum | report only (ug/L) | all year |
| Floating solids, waste or visible foam-visual | value | report only (N=0;Y=1) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/min) | all year |
Cited limits by parameter: Oregon's rules and the federal ones.
Same industry: the 25 Lumber and Wood Products permits in Oregon.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/OR0039594 · MCP: https://passage-data.com/mcp