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Lhoist North America of Tennessee LLC dba Spinks Clay Co.

Kaolin And Ball Clay, Henry, Tennessee. NPDES permit TN0072800, in force until Jul 31, 2031. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 3001 form G quarterly (12 values), outfall 3002 form G quarterly (12 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 24 required values missing, 4 of 24 reports late

Limits in force (24)

ParameterStatisticLimitMonthsOutfall
pHdaily minimum≥ 6 SUall year3001
pHdaily minimum≥ 6 SUall year3001
pHdaily maximum≤ 9 SUall year3001
pHdaily maximum≤ 9 SUall year3001
Solids, total suspendedmonthly average≤ 35 mg/Lall year3001
Solids, total suspendedmonthly average≤ 35 mg/Lall year3001
Solids, total suspendeddaily maximum≤ 70 mg/Lall year3001
Solids, total suspendeddaily maximum≤ 70 mg/Lall year3001
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/min)all year3001
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/min)all year3001
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/min)all year3001
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/min)all year3001
pHdaily minimum≥ 6 SUall year3002
pHdaily minimum≥ 6 SUall year3002
pHdaily maximum≤ 9 SUall year3002
pHdaily maximum≤ 9 SUall year3002
Solids, total suspendedmonthly average≤ 35 mg/Lall year3002
Solids, total suspendedmonthly average≤ 35 mg/Lall year3002
Solids, total suspendeddaily maximum≤ 70 mg/Lall year3002
Solids, total suspendeddaily maximum≤ 70 mg/Lall year3002
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/min)all year3002
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/min)all year3002
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/min)all year3002
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/min)all year3002

How strict are these limits?

Cited limits by parameter: Tennessee's rules and the federal ones.

Same industry: the 353 Mining and Quarrying of Nonmetallic Minerals permits in Tennessee.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TN0072800 · MCP: https://passage-data.com/mcp