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Mark Sand and Gravel

Construction Sand And Gravel, Hankinson, North Dakota. NPDES permit ND0024201, in force until Dec 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 30 days after each period: form A yearly
Renewal application due: Jul 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file: December 2025
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 0 of 1 report late

Limits in force (9)

Parameter	Statistic	Limit	Months
pH	minimum	≥ 6.5 SU	all year
pH	maximum	≤ 9 SU	all year
Solids, total suspended	monthly average	≤ 30 mg/L	all year
Solids, total suspended	daily maximum	≤ 45 mg/L	all year
Oil & Grease	daily maximum	≤ 10 mg/L	all year
Flow, in conduit or thru treatment plant	monthly average	report only (MGD)	all year
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year
Flow, total	total	report only (Mgal)	all year
Oil and grease visual	total	report only (N=0;Y=1)	all year

How strict are these limits?

Solids, total suspended, daily maximum 45 mg/L — stricter than 75% of 29 other minor industrial and other permits in North Dakota; 24% have the same limit
pH, minimum at least 6.5 SU — stricter than 60% of 43 other minor industrial and other permits in North Dakota; 40% have the same limit
Solids, total suspended, monthly average 30 mg/L — stricter than 36% of 25 other minor industrial and other permits in North Dakota; 64% have the same limit

Cited limits by parameter: North Dakota'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/ND0024201 · MCP: https://passage-data.com/mcp