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The Black Diamond Company

Industrial or other facility, Conaway, Virginia. NPDES permit VAM080398, in force until Dec 20, 2028. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: outfall 4817 form Q quarterly (13 values), outfall 4818 form Q quarterly (13 values), outfall 4819 form Q quarterly (13 values), outfall 4821 form Q quarterly (13 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 48 reports late

Limits in force (52)

ParameterStatisticLimitMonthsOutfall
pHinstantaneous minimum≥ 6 SUall year4817
pHinstantaneous maximum≤ 9 SUall year4817
Solids, total suspendeddaily minimumreport only (mg/L)all year4817
Solids, total suspendedmonthly average≤ 35 mg/Lall year4817
Solids, total suspendeddaily maximum≤ 70 mg/Lall year4817
Iron, total [as Fe]daily minimumreport only (mg/L)all year4817
Iron, total [as Fe]monthly average≤ 3.5 mg/Lall year4817
Iron, total [as Fe]daily maximum≤ 7 mg/Lall year4817
Manganese, total [as Mn]daily minimumreport only (mg/L)all year4817
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year4817
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year4817
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/min)all year4817
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/min)all year4817
pHinstantaneous minimum≥ 6 SUall year4818
pHinstantaneous maximum≤ 9 SUall year4818
Solids, total suspendeddaily minimumreport only (mg/L)all year4818
Solids, total suspendedmonthly average≤ 35 mg/Lall year4818
Solids, total suspendeddaily maximum≤ 70 mg/Lall year4818
Iron, total [as Fe]daily minimumreport only (mg/L)all year4818
Iron, total [as Fe]monthly average≤ 3.5 mg/Lall year4818
Iron, total [as Fe]daily maximum≤ 7 mg/Lall year4818
Manganese, total [as Mn]daily minimumreport only (mg/L)all year4818
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year4818
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year4818
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/min)all year4818
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/min)all year4818
pHinstantaneous minimum≥ 6 SUall year4819
pHinstantaneous maximum≤ 9 SUall year4819
Solids, total suspendeddaily minimumreport only (mg/L)all year4819
Solids, total suspendedmonthly average≤ 35 mg/Lall year4819
Solids, total suspendeddaily maximum≤ 70 mg/Lall year4819
Iron, total [as Fe]daily minimumreport only (mg/L)all year4819
Iron, total [as Fe]monthly average≤ 3.5 mg/Lall year4819
Iron, total [as Fe]daily maximum≤ 7 mg/Lall year4819
Manganese, total [as Mn]daily minimumreport only (mg/L)all year4819
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year4819
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year4819
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/min)all year4819
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/min)all year4819
pHinstantaneous minimum≥ 6 SUall year4821
pHinstantaneous maximum≤ 9 SUall year4821
Solids, total suspendeddaily minimumreport only (mg/L)all year4821
Solids, total suspendedmonthly average≤ 35 mg/Lall year4821
Solids, total suspendeddaily maximum≤ 70 mg/Lall year4821
Iron, total [as Fe]daily minimumreport only (mg/L)all year4821
Iron, total [as Fe]monthly average≤ 3.5 mg/Lall year4821
Iron, total [as Fe]daily maximum≤ 7 mg/Lall year4821
Manganese, total [as Mn]daily minimumreport only (mg/L)all year4821
Manganese, total [as Mn]monthly average≤ 2 mg/Lall year4821
Manganese, total [as Mn]daily maximum≤ 4 mg/Lall year4821
Flow, in conduit or thru treatment plantmonthly averagereport only (gal/min)all year4821
Flow, in conduit or thru treatment plantdaily maximumreport only (gal/min)all year4821

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/VAM080398 · MCP: https://passage-data.com/mcp