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Motive Power Marine Shipyard

Ship Building And Repairing, Tacoma, Washington. NPDES permit WA0041106, in force until Nov 30, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due: About 15 days after each period: form MM monthly (10 values)
Last report on file: September 2026
Oct 2024 – Sep 2025: 0 values over a limit, 0 required values missing, 3 of 14 reports late

Limits in force (10)

Parameter	Statistic	Limit	Months
pH	maximum	≤ 9 SU	all year
pH	minimum	≥ 6 SU	all year
Solids, total suspended	daily maximum	≤ 30 mg/L	all year
Oil and grease, hexane extr method	daily maximum	≤ 15 mg/L	all year
Copper, total [as Cu]	daily maximum	≤ 14 ug/L	all year
Lead, total [as Pb]	daily maximum	≤ 81.6 ug/L	all year
Zinc, total [as Zn]	daily maximum	≤ 117 ug/L	all year
Total Petroleum Hydrocarbons - Diesel	daily maximum	≤ 10 mg/L	all year
Mercury, total [as Hg]	daily maximum	report only (ng/L) (alert, not enforceable)	all year
Mercury, total [as Hg]	monthly average	report only (ng/L) (alert, not enforceable)	all year

How strict are these limits?

Zinc, total [as Zn], daily maximum 117 ug/L — stricter than 71% of 161 other minor industrial and other permits nationwide
Copper, total [as Cu], daily maximum 14 ug/L — stricter than 48% of 286 other minor industrial and other permits nationwide
Solids, total suspended, daily maximum 30 mg/L — stricter than 48% of 25 other minor industrial and other permits in Washington; 36% have the same limit

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

Same industry: the 13 Transportation Equipment permits in Washington.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WA0041106 · MCP: https://passage-data.com/mcp