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Chemical Preparations, Winston, Oregon. NPDES permit OR0034380 expired May 31, 2010; its limits still apply. Last 12 months: no values over a limit, 8 of 36 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Turbidity | value | report only (NTU) | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 001 |
| pH | daily maximum | ≤ 8.5 SU (alert, not enforceable) | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 130 mg/L (alert, not enforceable) | all year | 001 |
| Oil & Grease | daily maximum | ≤ 10 mg/L (alert, not enforceable) | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.73 mg/L (alert, not enforceable) | all year | 001 |
| Hardness, total [as CaCO3] | value | report only (mg/L) | all year | 001 |
| Arsenic, trivalent total recoverable | daily maximum | ≤ 190 ug/L (alert, not enforceable) | all year | 001 |
| Arsenic, total [as As] | value | report only (ug/L) | all year | 001 |
| Cadmium, total [as Cd] | value | report only (ug/L) | all year | 001 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ 11 ug/L (alert, not enforceable) | all year | 001 |
| Chromium, trivalent [as Cr] | daily maximum | ≤ 66 ug/L (alert, not enforceable) | all year | 001 |
| Chromium, total [as Cr] | value | report only (ug/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ 3.6 ug/L (alert, not enforceable) | all year | 001 |
| Lead, total [as Pb] | value | report only (ug/L) | all year | 001 |
| Manganese, total [as Mn] | value | report only (ug/L) | all year | 001 |
| Molybdenum, total [as Mo] | value | report only (ug/L) | all year | 001 |
| Zinc, total [as Zn] | value | ≤ 33 ug/L (alert, not enforceable) | all year | 001 |
| Selenium, total [as Se] | value | report only (ug/L) | all year | 001 |
| Arsenic | daily maximum | ≤ 48 ug/L (alert, not enforceable) | all year | 001 |
| Floating solids, waste or visible foam-visual | value | ≤ 0 N=0;Y=1 (alert, not enforceable) | all year | 001 |
| Rainfall | monthly average | report only (in) | all year | 001 |
| Rainfall | daily maximum | report only (in) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Formaldehyde | daily maximum | ≤ 1.61 mg/L (alert, not enforceable) | all year | 001 |
| Mercury, total [as Hg] | value | report only (ug/L) | all year | 001 |
| Oil and grease visual | value | ≤ 0 N=0;Y=1 (alert, not enforceable) | all year | 001 |
| Turbidity | value | report only (NTU) | all year | 002 |
| pH | daily minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 002 |
| pH | daily maximum | ≤ 8.5 SU (alert, not enforceable) | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 130 mg/L (alert, not enforceable) | all year | 002 |
| Oil & Grease | daily maximum | ≤ 10 mg/L (alert, not enforceable) | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.73 mg/L (alert, not enforceable) | all year | 002 |
| Hardness, total [as CaCO3] | value | report only (mg/L) | all year | 002 |
| Arsenic, trivalent total recoverable | daily maximum | ≤ 190 ug/L (alert, not enforceable) | all year | 002 |
| Arsenic, total [as As] | value | report only (ug/L) | all year | 002 |
| Cadmium, total [as Cd] | value | report only (ug/L) | all year | 002 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ 11 ug/L (alert, not enforceable) | all year | 002 |
| Chromium, trivalent [as Cr] | daily maximum | ≤ 66 ug/L (alert, not enforceable) | all year | 002 |
| Chromium, total [as Cr] | value | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | daily maximum | ≤ 3.6 ug/L (alert, not enforceable) | all year | 002 |
| Lead, total [as Pb] | value | report only (ug/L) | all year | 002 |
| Manganese, total [as Mn] | value | report only (ug/L) | all year | 002 |
| Molybdenum, total [as Mo] | value | report only (ug/L) | all year | 002 |
| Zinc, total [as Zn] | value | ≤ 33 ug/L (alert, not enforceable) | all year | 002 |
| Selenium, total [as Se] | value | report only (ug/L) | all year | 002 |
| Arsenic | daily maximum | ≤ 48 ug/L (alert, not enforceable) | all year | 002 |
| Floating solids, waste or visible foam-visual | value | ≤ 0 N=0;Y=1 (alert, not enforceable) | all year | 002 |
| Rainfall | monthly average | report only (in) | all year | 002 |
| Rainfall | daily maximum | report only (in) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Formaldehyde | daily maximum | ≤ 1.61 mg/L (alert, not enforceable) | all year | 002 |
| Mercury, total [as Hg] | value | report only (ug/L) | all year | 002 |
| Oil and grease visual | value | ≤ 0 N=0;Y=1 (alert, not enforceable) | all year | 002 |
| Turbidity | value | report only (NTU) | all year | 003 |
| pH | daily minimum | ≥ 6.5 SU (alert, not enforceable) | all year | 003 |
| pH | daily maximum | ≤ 8.5 SU (alert, not enforceable) | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 130 mg/L (alert, not enforceable) | all year | 003 |
| Oil & Grease | daily maximum | ≤ 10 mg/L (alert, not enforceable) | all year | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.73 mg/L (alert, not enforceable) | all year | 003 |
| Hardness, total [as CaCO3] | value | report only (mg/L) | all year | 003 |
| Arsenic, trivalent total recoverable | daily maximum | ≤ 190 ug/L (alert, not enforceable) | all year | 003 |
| Arsenic, total [as As] | value | report only (ug/L) | all year | 003 |
| Cadmium, total [as Cd] | value | report only (ug/L) | all year | 003 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ 11 ug/L (alert, not enforceable) | all year | 003 |
| Chromium, trivalent [as Cr] | daily maximum | ≤ 66 ug/L (alert, not enforceable) | all year | 003 |
| Chromium, total [as Cr] | value | report only (ug/L) | all year | 003 |
| Copper, total [as Cu] | daily maximum | ≤ 3.6 ug/L (alert, not enforceable) | all year | 003 |
| Lead, total [as Pb] | value | report only (ug/L) | all year | 003 |
| Manganese, total [as Mn] | value | report only (ug/L) | all year | 003 |
| Molybdenum, total [as Mo] | value | report only (ug/L) | all year | 003 |
| Zinc, total [as Zn] | value | ≤ 33 ug/L (alert, not enforceable) | all year | 003 |
| Selenium, total [as Se] | value | report only (ug/L) | all year | 003 |
| Arsenic | daily maximum | ≤ 48 ug/L (alert, not enforceable) | all year | 003 |
| Floating solids, waste or visible foam-visual | value | ≤ 0 N=0;Y=1 (alert, not enforceable) | all year | 003 |
| Rainfall | monthly average | report only (in) | all year | 003 |
| Rainfall | daily maximum | report only (in) | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Formaldehyde | daily maximum | ≤ 1.61 mg/L (alert, not enforceable) | all year | 003 |
| Mercury, total [as Hg] | value | report only (ug/L) | all year | 003 |
| Oil and grease visual | value | ≤ 0 N=0;Y=1 (alert, not enforceable) | all year | 003 |
Cited limits by parameter: Oregon's rules and the federal ones.
Same industry: the 8 Chemicals and Allied 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/OR0034380 · MCP: https://passage-data.com/mcp