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Vulcan Construction Materials, LLC - Black Rock Quarry

Crushed And Broken Limestone, Black Rock, Arkansas. NPDES permit AR0046922 expired Feb 28, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (24 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (24)

ParameterStatisticLimitMonths
Oxygen demand, chem. [low level] [COD]monthly average≤ 50 mg/Lall year
Oxygen demand, chem. [low level] [COD]daily maximum≤ 75 mg/Lall year
Oxygen demand, chem. [low level] [COD]monthly average≤ 180.1 lb/dall year
Oxygen demand, chem. [low level] [COD]daily maximum≤ 270.2 lb/dall year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 20 mg/Lall year
Solids, total suspendeddaily maximum≤ 30 mg/Lall year
Solids, total suspendedmonthly average≤ 72.1 lb/dall year
Solids, total suspendeddaily maximum≤ 108.1 lb/dall year
Oil & Greasemonthly average≤ 10 mg/Lall year
Oil & Greasedaily maximum≤ 15 mg/Lall year
Oil & Greasemonthly average≤ 36 lb/dall year
Oil & Greasedaily maximum≤ 54 lb/dall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Sulfates, total [as SO4]monthly average≤ 260 mg/Lall year
Sulfates, total [as SO4]daily maximum≤ 390 mg/Lall year
Sulfates, total [as SO4]monthly average≤ 936.7 lb/dall year
Sulfates, total [as SO4]daily maximum≤ 1405.1 lb/dall year
Solids, total dissolvedmonthly average≤ 725 mg/Lall year
Solids, total dissolveddaily maximum≤ 1088 mg/Lall year
Solids, total dissolvedmonthly average≤ 2612 lb/dall year
Solids, total dissolveddaily maximum≤ 3918.1 lb/dall year

How strict are these limits?

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

Same industry: the 30 Mining and Quarrying of Nonmetallic Minerals permits in Arkansas.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AR0046922 · MCP: https://passage-data.com/mcp