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Northlake Shipyard Inc

Ship Building And Repairing, Seattle, Washington. NPDES permit WA0030864, in force until Sep 30, 2027. Last 12 months: over a limit once (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 003 form QQ quarterly (1 value), outfall BGT2 form QQ quarterly (1 value), outfall BGT9 form QQ quarterly (1 value), outfall DD1 form QQ quarterly (6 values), outfall DD2 form QQ quarterly (6 values), outfall MP1 form QQ quarterly (2 values), and 3 more forms
Renewal application due
Apr 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 36 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimit
September 2026Turbidity, increase over background, daily maximum> .14≤ 5 NTU

Limits in force (23)

ParameterStatisticLimitMonthsOutfall
Volume, totaldaily maximumreport only (gal) (alert, not enforceable)all year003
Turbiditydaily maximumreport only (NTU) (alert, not enforceable)all yearBGT2
Turbiditydaily maximumreport only (NTU) (alert, not enforceable)all yearBGT9
Turbiditydaily maximumreport only (NTU) (alert, not enforceable)all yearDD1
Oil and grease, hexane extr methoddaily maximum≤ 5 mg/Lall yearDD1
Copper, total [as Cu]daily maximum≤ 76 ug/L (alert, not enforceable)all yearDD1
Zinc, total [as Zn]daily maximum≤ 48 ug/L (alert, not enforceable)all yearDD1
Turbidity, increase over backgrounddaily maximum≤ 5 NTUall yearDD1
Oil and grease visualdaily maximum≤ 0 N=0;Y=1all yearDD1
Turbiditydaily maximumreport only (NTU) (alert, not enforceable)all yearDD2
Oil and grease, hexane extr methoddaily maximum≤ 5 mg/Lall yearDD2
Copper, total [as Cu]daily maximum≤ 76 ug/L (alert, not enforceable)all yearDD2
Zinc, total [as Zn]daily maximum≤ 48 ug/L (alert, not enforceable)all yearDD2
Turbidity, increase over backgrounddaily maximum≤ 5 NTUall yearDD2
Oil and grease visualdaily maximum≤ 0 N=0;Y=1all yearDD2
Copper, total [as Cu]daily maximumreport only (ug/L) (alert, not enforceable)all yearMP1
Zinc, total [as Zn]daily maximumreport only (ug/L) (alert, not enforceable)all yearMP1
Copper, total [as Cu]daily maximumreport only (ug/L) (alert, not enforceable)all yearMP2
Zinc, total [as Zn]daily maximumreport only (ug/L) (alert, not enforceable)all yearMP2
Copper, total [as Cu]daily maximumreport only (ug/L) (alert, not enforceable)all yearMP3
Zinc, total [as Zn]daily maximumreport only (ug/L) (alert, not enforceable)all yearMP3
Copper, total [as Cu]daily maximumreport only (ug/L) (alert, not enforceable)all yearMP4
Zinc, total [as Zn]daily maximumreport only (ug/L) (alert, not enforceable)all yearMP4

How strict are these limits?

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/WA0030864 · MCP: https://passage-data.com/mcp