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Lhoist North America of Virginia Incorporated

Lime, Ripplemead, Virginia. NPDES permit VA0000523, in force until Jun 30, 2031. Last 12 months: no values over a limit, 20 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: outfall 001 form M1 monthly (12 values), outfall 002 form M1 monthly (6 values), outfall 003 form M1 monthly (10 values), outfall 001 form Q1 quarterly, outfall 001 form S1 twice a year, outfall 002 form A1 yearly, and 5 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
5 values over a limit, 0 required values missing, 0 of 54 reports late

Limits in force (47)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademaximum≤ 21 deg Call year001
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year001
pHinstantaneous minimum≥ 6 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendeddaily maximum≤ 60 mg/Lall year001
Oil & Greasemonthly average≤ 10 mg/Lall year001
Oil & Greasedaily maximum≤ 15 mg/Lall year001
Chromium, hexavalent dissolved [as Cr]monthly average≤ 4.3 ug/Lall year001
Chromium, hexavalent dissolved [as Cr]daily maximum≤ 4.3 ug/Lall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Length of longest pH excursionevent total≤ 60 minall year001
pH range excursions, monthly total accummonthly total≤ 446 minall year001
TU Static Renewal 7-Day Chronic Pimphales promelasmaximum≤ 1.85 tox chronicall year001
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
Solids, total suspendedmonthly average≤ 30 mg/Lall year002
Solids, total suspendeddaily maximum≤ 50 mg/Lall year002
Oil & Greasemonthly average≤ 10 mg/Lall year002
Oil & Greasedaily maximum≤ 15 mg/Lall year002
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Temperature, water deg. centigrademaximum≤ 21 deg Call year003
Oxygen, dissolved [DO]minimum≥ 5 mg/Lall year003
pHminimum≥ 6 SUall year003
pHmaximum≤ 9 SUall year003
Solids, total suspendedmonthly average≤ 30 mg/Lall year003
Solids, total suspendeddaily maximum≤ 60 mg/Lall year003
Oil & Greasedaily maximum≤ 15 mg/Lall year003
Hardness, total [as CaCO3]maximumreport only (mg/L)all year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
Toxic Units Static 48HR Acute Ceriodaphnia dubiamaximumreport only (tox acute)all year003
pHdaily minimum≥ 6 SUall year004
pHdaily maximum≤ 9 SUall year004
Solids, total suspendeddaily maximumreport only (mg/L)all year004
Precipitation volumedaily maximumreport only (Mgal)all year004
pHdaily minimum≥ 6 SUall year005
pHdaily maximum≤ 9 SUall year005
Solids, total suspendeddaily maximum≤ 50 mg/Lall year005
Precipitation volumedaily maximumreport only (Mgal)all year005
pHdaily minimum≥ 6 SUall year301
pHdaily maximum≤ 9 SUall year301
Solids, total suspendeddaily maximum≤ 50 mg/Lall year301
Precipitation volumedaily maximumreport only (Mgal)all year301

How strict are these limits?

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

Same industry: the 4 Stone, Clay, Glass and Concrete Products permits in Virginia.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/VA0000523 · MCP: https://passage-data.com/mcp