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Lake Union Drydock Co

Ship Building And Repairing, Seattle, Washington. NPDES permit WA0030074 expired Mar 31, 2023; its limits still apply. Last 12 months: over a limit 2 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall D08 form QQ quarterly (3 values), outfall D09 form QQ quarterly (3 values), outfall D8ST form BA twice a year, outfall D9ST form BA twice a year
Last report on file
September 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 2 of 12 reports late

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

Period endingOutfallParameterReportedLimit
June 2026D08Oil and grease, hexane extr method, daily maximum> 1≤ 5 mg/L
June 2026D09Oil and grease, hexane extr method, daily maximum> 1≤ 5 mg/L

Limits in force (24)

ParameterStatisticLimitMonthsOutfall
Turbiditydaily maximumreport only (NTU) (alert, not enforceable)all yearD08
Turbiditydaily maximumreport only (NTU) (alert, not enforceable)all yearD08
Oil and grease, hexane extr methoddaily maximum≤ 5 mg/Lall yearD08
Oil and grease, hexane extr methoddaily maximum≤ 5 mg/Lall yearD08
Oil and grease visualdaily maximum≤ 0 N=0;Y=1all yearD08
Oil and grease visualdaily maximum≤ 0 N=0;Y=1all yearD08
Turbiditydaily maximumreport only (NTU) (alert, not enforceable)all yearD09
Turbiditydaily maximumreport only (NTU) (alert, not enforceable)all yearD09
Oil and grease, hexane extr methoddaily maximum≤ 5 mg/Lall yearD09
Oil and grease, hexane extr methoddaily maximum≤ 5 mg/Lall yearD09
Oil and grease visualdaily maximum≤ 0 N=0;Y=1all yearD09
Oil and grease visualdaily maximum≤ 0 N=0;Y=1all yearD09
Copper, total [as Cu]daily maximumreport only (ug/L) (alert, not enforceable)all yearD8ST
Copper, total [as Cu]daily maximumreport only (ug/L) (alert, not enforceable)all yearD8ST
Lead, total [as Pb]daily maximumreport only (ug/L) (alert, not enforceable)all yearD8ST
Lead, total [as Pb]daily maximumreport only (ug/L) (alert, not enforceable)all yearD8ST
Zinc, total [as Zn]daily maximumreport only (ug/L) (alert, not enforceable)all yearD8ST
Zinc, total [as Zn]daily maximumreport only (ug/L) (alert, not enforceable)all yearD8ST
Copper, total [as Cu]daily maximumreport only (ug/L) (alert, not enforceable)all yearD9ST
Copper, total [as Cu]daily maximumreport only (ug/L) (alert, not enforceable)all yearD9ST
Lead, total [as Pb]daily maximumreport only (ug/L) (alert, not enforceable)all yearD9ST
Lead, total [as Pb]daily maximumreport only (ug/L) (alert, not enforceable)all yearD9ST
Zinc, total [as Zn]daily maximumreport only (ug/L) (alert, not enforceable)all yearD9ST
Zinc, total [as Zn]daily maximumreport only (ug/L) (alert, not enforceable)all yearD9ST

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/WA0030074 · MCP: https://passage-data.com/mcp