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Lhoist North America of TN, LLC dba Spinks Clay Co.

Kaolin And Ball Clay, Clarksburg, Tennessee. NPDES permit TN0063541 expired Oct 31, 2026. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 2301 form G quarterly (12 values), outfall 2302 form G quarterly (12 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (24)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6 SUall year2301
pHminimum≥ 6 SUall year2301
pHmaximum≤ 9 SUall year2301
pHmaximum≤ 9 SUall year2301
Solids, total suspendedmonthly average≤ 35 mg/Lall year2301
Solids, total suspendedmonthly average≤ 35 mg/Lall year2301
Solids, total suspendeddaily maximum≤ 70 mg/Lall year2301
Solids, total suspendeddaily maximum≤ 70 mg/Lall year2301
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/min)all year2301
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/min)all year2301
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/min)all year2301
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/min)all year2301
pHminimum≥ 6 SUall year2302
pHminimum≥ 6 SUall year2302
pHmaximum≤ 9 SUall year2302
pHmaximum≤ 9 SUall year2302
Solids, total suspendedmonthly average≤ 35 mg/Lall year2302
Solids, total suspendedmonthly average≤ 35 mg/Lall year2302
Solids, total suspendeddaily maximum≤ 70 mg/Lall year2302
Solids, total suspendeddaily maximum≤ 70 mg/Lall year2302
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/min)all year2302
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/min)all year2302
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/min)all year2302
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/min)all year2302

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/TN0063541 · MCP: https://passage-data.com/mcp