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Construction Sand And Gravel, Gorham, Illinois. NPDES permit IL0063797, in force until Jul 31, 2027. Last 12 months: no values over a limit, 1 of 11 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 | ≤ 35 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 70 mg/L | all year |
| Iron, total [as Fe] | 30-day average | ≤ 3.5 mg/L | all year |
| Iron, total [as Fe] | daily maximum | ≤ 7 mg/L | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
Cited limits by parameter: Illinois's rules and the federal ones.
Same industry: the 24 Mining and Quarrying of Nonmetallic Minerals permits in Illinois.
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On EPA ECHO: Facility report · DMR history
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