Clean Water Act discharge permit · NPDES COG074267
GRANGE HALL CREEK, Denver County, CO: NPDES COG074267 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 9Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
GRANGE HALL CREEK, held by Edge Contracting Inc, holds NPDES permit COG074267, which discharges to Grange Hall Creek And Groundwater. EPA’s file records it issued October 12, 2012 and expiring September 30, 2013. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | GRANGE HALL CREEK |
|---|---|
| Permittee as filed | Edge Contracting Inc |
| NPDES ID | COG074267 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | October 12, 2012 |
| Expiration date | September 30, 2013 |
| Address | Denver County, CO 80229 |
| Receiving water | Grange Hall Creek and Groundwater |
| Subwatershed | City of Thornton-South Platte River (HUC 101900030402) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 9Pollutants on file
- 9Under a numeric limit
- 9With a violation of any kind
- 0With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Toluene | 3 | 5 | 0 | ||
| Benzene | 3 | 5 | 0 | ||
| Ethylbenzene | 3 | 5 | 0 | ||
| pH | 4 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 2 | 0 | ||
| Solids, total suspended | 2 | 2 | 0 | ||
| Oil and grease | 2 | 2 | 0 | ||
| Oil and grease visual | 2 | 2 | 0 | ||
| Xylene [mix of m+o+p] | 3 | 1 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES COG074267.
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES COG074267.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID COG074267 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.