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Special Trade Contractors, Denver, Colorado. NPDES permit CO0048962 expired Jul 31, 2020; its limits still apply. Last 12 months: no values over a limit, 24 required values missing, 11 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year |
| Iron, dissolved [as Fe] | 30-day average | report only (ug/L) | all year |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year |
| Uranium, total | 30-day average | report only (ug/L) | all year |
| Uranium, total | daily maximum | report only (ug/L) | all year |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .0048 MGD | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Sulfate | 30-day average | report only (mg/L) | all year |
| Oil and grease visual | instantaneous maximum | report only (abst=0;prst=1) | all year |
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | minimum value | ≥ 100 % | all year |
| LC50 Static Renewal 48Hr Acute Pimephales promelas | minimum value | ≥ 100 % | all year |
Cited limits by parameter: Colorado'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/CO0048962 · MCP: https://passage-data.com/mcp