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Wood Preserving, Washougal, Washington. NPDES permit WA0040711 expired Sep 30, 2023; its limits still apply. Last 12 months: over a limit once (last June 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| June 2026 | Oil and grease, hexane extr method, daily maximum | 16 | ≤ 10 mg/L | 60% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Flow, total | monthly average | report only (gal) (alert, not enforceable) | all year | 0SW |
| Flow, total | monthly average | report only (gal) (alert, not enforceable) | all year | 0SW |
| Flow, total | monthly total | report only (gal) (alert, not enforceable) | all year | 0SW |
| Flow, total | monthly total | report only (gal) (alert, not enforceable) | all year | 0SW |
| pH | maximum | ≤ 9 SU | all year | EFF |
| pH | maximum | ≤ 9 SU | all year | EFF |
| pH | minimum | ≥ 6 SU | all year | EFF |
| pH | minimum | ≥ 6 SU | all year | EFF |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | EFF |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | EFF |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year | EFF |
| Oil and grease, hexane extr method | daily maximum | ≤ 10 mg/L | all year | EFF |
| Arsenic, total [as As] | daily maximum | ≤ 111 ug/L | all year | EFF |
| Arsenic, total [as As] | daily maximum | ≤ 111 ug/L | all year | EFF |
| Chromium, total [as Cr] | daily maximum | ≤ 180 ug/L | all year | EFF |
| Chromium, total [as Cr] | daily maximum | ≤ 180 ug/L | all year | EFF |
| Copper, total [as Cu] | daily maximum | ≤ 160 ug/L | all year | EFF |
| Copper, total [as Cu] | daily maximum | ≤ 160 ug/L | all year | EFF |
| Flow, total | monthly total | report only (gal) (alert, not enforceable) | all year | EFF |
| Flow, total | monthly total | report only (gal) (alert, not enforceable) | all year | EFF |
| Tebuconazole | daily maximum | ≤ 20 ug/L | all year | EFF |
| Tebuconazole | daily maximum | ≤ 20 ug/L | all year | EFF |
| Flow | daily maximum | report only (gal/d) (alert, not enforceable) | all year | EFF |
| Flow | daily maximum | report only (gal/d) (alert, not enforceable) | all year | EFF |
| Flow | monthly average | report only (gal/d) (alert, not enforceable) | all year | EFF |
| Flow | monthly average | report only (gal/d) (alert, not enforceable) | all year | EFF |
| pH | maximum | report only (SU) (alert, not enforceable) | all year | INF |
| pH | maximum | report only (SU) (alert, not enforceable) | all year | INF |
| pH | minimum | report only (SU) (alert, not enforceable) | all year | INF |
| pH | minimum | report only (SU) (alert, not enforceable) | all year | INF |
| Solids, total suspended | daily maximum | report only (mg/L) (alert, not enforceable) | all year | INF |
| Solids, total suspended | daily maximum | report only (mg/L) (alert, not enforceable) | all year | INF |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) (alert, not enforceable) | all year | INF |
| Oil and grease, hexane extr method | daily maximum | report only (mg/L) (alert, not enforceable) | all year | INF |
| Copper, total [as Cu] | daily maximum | report only (ug/L) (alert, not enforceable) | all year | INF |
| Copper, total [as Cu] | daily maximum | report only (ug/L) (alert, not enforceable) | all year | INF |
Cited limits by parameter: Washington's rules and the federal ones.
Same industry: the 11 Lumber and Wood Products permits in Washington.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/WA0040711 · MCP: https://passage-data.com/mcp