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

Kaolin And Ball Clay, Greenfield, Tennessee. NPDES permit TN0072265, in force until Jun 30, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 291 form G quarterly (6 values), outfall 292 form G quarterly (6 values), outfall SW01 form Y yearly
Renewal application due
Jan 2, 2028 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 25 reports late

Limits in force (18)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6 SUall year291
pHmaximum≤ 9 SUall year291
Solids, total suspendedmonthly average≤ 35 mg/Lall year291
Solids, total suspendeddaily maximum≤ 70 mg/Lall year291
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/min)all year291
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/min)all year291
pHminimum≥ 6 SUall year292
pHmaximum≤ 9 SUall year292
Solids, total suspendedmonthly average≤ 35 mg/Lall year292
Solids, total suspendeddaily maximum≤ 70 mg/Lall year292
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/min)all year292
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/min)all year292
pHminimum≥ 6 SU (alert, not enforceable)all yearSW01
pHmaximum≤ 9 SU (alert, not enforceable)all yearSW01
Solids, total suspendeddaily maximum≤ 150 mg/L (alert, not enforceable)all yearSW01
Oil & Greasedaily maximum≤ 15 mg/L (alert, not enforceable)all yearSW01
Flow, in conduit or thru treatment plantminimumreport only (gal/min) (alert, not enforceable)all yearSW01
Flow, in conduit or thru treatment plantmaximumreport only (gal/min) (alert, not enforceable)all yearSW01

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.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TN0072265 · MCP: https://passage-data.com/mcp