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Crushed And Broken Limestone, Thorn Hill, Tennessee. NPDES permit TN0060127, in force until Oct 31, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 001 |
| Cadmium, total [as Cd] | monthly average | ≤ .002 mg/L | all year | 001 |
| Cadmium, total [as Cd] | monthly average | ≤ .002 mg/L | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | ≤ .021 mg/L | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | ≤ .021 mg/L | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ .0466 mg/L | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ .0466 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .0742 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ .0742 mg/L | all year | 001 |
| Lead, total [as Pb] | monthly average | ≤ .0287 mg/L | all year | 001 |
| Lead, total [as Pb] | monthly average | ≤ .0287 mg/L | all year | 001 |
| Lead, total [as Pb] | daily maximum | ≤ .6 mg/L | all year | 001 |
| Lead, total [as Pb] | daily maximum | ≤ .6 mg/L | all year | 001 |
| Thallium, total [as Tl] | monthly average | ≤ .0005 mg/L | all year | 001 |
| Thallium, total [as Tl] | monthly average | ≤ .0005 mg/L | all year | 001 |
| Thallium, total [as Tl] | daily maximum | ≤ .0005 mg/L | all year | 001 |
| Thallium, total [as Tl] | daily maximum | ≤ .0005 mg/L | all year | 001 |
| Zinc, total [as Zn] | monthly average | ≤ .5 mg/L | all year | 001 |
| Zinc, total [as Zn] | monthly average | ≤ .5 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ .733 mg/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ .733 mg/L | all year | 001 |
| Selenium, total [as Se] | monthly average | ≤ .0031 mg/L | all year | 001 |
| Selenium, total [as Se] | monthly average | ≤ .0031 mg/L | all year | 001 |
| Selenium, total [as Se] | daily maximum | ≤ .0204 mg/L | all year | 001 |
| Selenium, total [as Se] | daily maximum | ≤ .0204 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/min) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/min) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/min) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/min) | all year | 001 |
| Mercury, total [as Hg] | monthly average | ≤ .00005 mg/L | all year | 001 |
| Mercury, total [as Hg] | monthly average | ≤ .00005 mg/L | all year | 001 |
| Mercury, total [as Hg] | daily maximum | ≤ .0001 mg/L | all year | 001 |
| Mercury, total [as Hg] | daily maximum | ≤ .0001 mg/L | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 003 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 003 |
| Cadmium, total [as Cd] | monthly average | ≤ .002 mg/L | all year | 003 |
| Cadmium, total [as Cd] | monthly average | ≤ .002 mg/L | all year | 003 |
| Cadmium, total [as Cd] | daily maximum | ≤ .021 mg/L | all year | 003 |
| Cadmium, total [as Cd] | daily maximum | ≤ .021 mg/L | all year | 003 |
| Copper, total [as Cu] | monthly average | ≤ .0466 mg/L | all year | 003 |
| Copper, total [as Cu] | monthly average | ≤ .0466 mg/L | all year | 003 |
| Copper, total [as Cu] | daily maximum | ≤ .0742 mg/L | all year | 003 |
| Copper, total [as Cu] | daily maximum | ≤ .0742 mg/L | all year | 003 |
| Lead, total [as Pb] | monthly average | ≤ .0287 mg/L | all year | 003 |
| Lead, total [as Pb] | monthly average | ≤ .0287 mg/L | all year | 003 |
| Lead, total [as Pb] | daily maximum | ≤ .6 mg/L | all year | 003 |
| Lead, total [as Pb] | daily maximum | ≤ .6 mg/L | all year | 003 |
| Thallium, total [as Tl] | monthly average | ≤ .0005 mg/L | all year | 003 |
| Thallium, total [as Tl] | monthly average | ≤ .0005 mg/L | all year | 003 |
| Thallium, total [as Tl] | daily maximum | ≤ .0005 mg/L | all year | 003 |
| Thallium, total [as Tl] | daily maximum | ≤ .0005 mg/L | all year | 003 |
| Zinc, total [as Zn] | monthly average | ≤ .5 mg/L | all year | 003 |
| Zinc, total [as Zn] | monthly average | ≤ .5 mg/L | all year | 003 |
| Zinc, total [as Zn] | daily maximum | ≤ .733 mg/L | all year | 003 |
| Zinc, total [as Zn] | daily maximum | ≤ .733 mg/L | all year | 003 |
| Selenium, total [as Se] | monthly average | ≤ .0031 mg/L | all year | 003 |
| Selenium, total [as Se] | monthly average | ≤ .0031 mg/L | all year | 003 |
| Selenium, total [as Se] | daily maximum | ≤ .0204 mg/L | all year | 003 |
| Selenium, total [as Se] | daily maximum | ≤ .0204 mg/L | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/min) | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/min) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/min) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/min) | all year | 003 |
| Mercury, total [as Hg] | monthly average | ≤ .00005 mg/L | all year | 003 |
| Mercury, total [as Hg] | monthly average | ≤ .00005 mg/L | all year | 003 |
| Mercury, total [as Hg] | daily maximum | ≤ .0001 mg/L | all year | 003 |
| Mercury, total [as Hg] | daily maximum | ≤ .0001 mg/L | all year | 003 |
| pH | minimum | ≥ 6 SU | all year | 004 |
| pH | minimum | ≥ 6 SU | all year | 004 |
| pH | maximum | ≤ 9 SU | all year | 004 |
| pH | maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 004 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 004 |
| Cadmium, total [as Cd] | monthly average | ≤ .002 mg/L | all year | 004 |
| Cadmium, total [as Cd] | monthly average | ≤ .002 mg/L | all year | 004 |
| Cadmium, total [as Cd] | daily maximum | ≤ .021 mg/L | all year | 004 |
| Cadmium, total [as Cd] | daily maximum | ≤ .021 mg/L | all year | 004 |
| Copper, total [as Cu] | monthly average | ≤ .0466 mg/L | all year | 004 |
| Copper, total [as Cu] | monthly average | ≤ .0466 mg/L | all year | 004 |
| Copper, total [as Cu] | daily maximum | ≤ .0742 mg/L | all year | 004 |
| Copper, total [as Cu] | daily maximum | ≤ .0742 mg/L | all year | 004 |
| Lead, total [as Pb] | monthly average | ≤ .0287 mg/L | all year | 004 |
| Lead, total [as Pb] | monthly average | ≤ .0287 mg/L | all year | 004 |
| Lead, total [as Pb] | daily maximum | ≤ .6 mg/L | all year | 004 |
| Lead, total [as Pb] | daily maximum | ≤ .6 mg/L | all year | 004 |
| Thallium, total [as Tl] | monthly average | ≤ .0005 mg/L | all year | 004 |
| Thallium, total [as Tl] | monthly average | ≤ .0005 mg/L | all year | 004 |
| Thallium, total [as Tl] | daily maximum | ≤ .0005 mg/L | all year | 004 |
| Thallium, total [as Tl] | daily maximum | ≤ .0005 mg/L | all year | 004 |
| Zinc, total [as Zn] | monthly average | ≤ .5 mg/L | all year | 004 |
| Zinc, total [as Zn] | monthly average | ≤ .5 mg/L | all year | 004 |
| Zinc, total [as Zn] | daily maximum | ≤ .733 mg/L | all year | 004 |
| Zinc, total [as Zn] | daily maximum | ≤ .733 mg/L | all year | 004 |
| Selenium, total [as Se] | monthly average | ≤ .0031 mg/L | all year | 004 |
| Selenium, total [as Se] | monthly average | ≤ .0031 mg/L | all year | 004 |
| Selenium, total [as Se] | daily maximum | ≤ .0204 mg/L | all year | 004 |
| Selenium, total [as Se] | daily maximum | ≤ .0204 mg/L | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/min) | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/min) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/min) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/min) | all year | 004 |
| Mercury, total [as Hg] | monthly average | ≤ .00005 mg/L | all year | 004 |
| Mercury, total [as Hg] | monthly average | ≤ .00005 mg/L | all year | 004 |
| Mercury, total [as Hg] | daily maximum | ≤ .0001 mg/L | all year | 004 |
| Mercury, total [as Hg] | daily maximum | ≤ .0001 mg/L | all year | 004 |
| pH | minimum | ≥ 6 SU | all year | 005 |
| pH | minimum | ≥ 6 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | all year | 005 |
| pH | maximum | ≤ 9 SU | all year | 005 |
| Solids, total suspended | monthly average | ≤ 40 mg/L | all year | 005 |
| Solids, total suspended | monthly average | ≤ 40 mg/L | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 40 mg/L | all year | 005 |
| Solids, total suspended | daily maximum | ≤ 40 mg/L | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/min) | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/min) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/min) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/min) | all year | 005 |
Cited limits by parameter: Tennessee's rules and the federal ones.
Same industry: the 353 Mining and Quarrying of Nonmetallic Minerals permits in Tennessee.
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