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Bituminous Materials and Supply

Asphalt Paving Mixtures And Blocks, Tama, Iowa. NPDES permit IA0078158, in force until Jan 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: form A quarterly (6 values)
Last report on file: September 2026
Oct 2024 – Sep 2025: 1 value over a limit, 0 required values missing, 0 of 4 reports late

Limits in force (6)

Parameter	Statistic	Limit	Months
pH	daily minimum	≥ 6.5 SU	all year
pH	daily maximum	≤ 9 SU	all year
Solids, total suspended	30-day average	≤ 15 mg/L	all year
Solids, total suspended	daily maximum	≤ 23 mg/L	all year
Oil & Grease	30-day average	≤ 10 mg/L	all year
Oil & Grease	daily maximum	≤ 15 mg/L	all year

How strict are these limits?

Solids, total suspended, 30-day average 15 mg/L — stricter than 97% of 289 other minor industrial and other permits in Iowa; 1% have the same limit
Solids, total suspended, daily maximum 23 mg/L — stricter than 94% of 114 other minor industrial and other permits in Iowa; 2% have the same limit
pH, daily minimum at least 6.5 SU — stricter than 60% of 423 other minor industrial and other permits in Iowa; 39% have the same limit

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

Same industry: the 3 Petroleum Refining and Related Industries permits in Iowa.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/IA0078158 · MCP: https://passage-data.com/mcp