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Metro Machine Corp.

Ship Building And Repairing, Norfolk, Virginia. NPDES permit VA0073091, in force until Jun 30, 2030. Last 12 months: no values over a limit, 1 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: outfall 002 form M1 monthly (8 values), outfall 002 form Q2 quarterly (3 values), outfall 007 form Q1 quarterly (8 values), outfall 901 form Q1 quarterly (7 values), outfall 011 form A1 yearly, outfall 011 form S1 twice a year
Last report on file
August 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 1 of 31 reports late

Limits in force (32)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
Solids, total suspendedmonthly average≤ 30 mg/Lall year002
Solids, total suspendedmaximum≤ 60 mg/Lall year002
Zinc, total recoverablemaximum≤ 180 ug/Lall year002
Copper, total recoverablemaximum≤ 32.6 ug/Lall year002
Petrol hydrocarbons, total recoverablemonthly average≤ 10 mg/Lall year002
Petrol hydrocarbons, total recoverablemaximum≤ 15 mg/Lall year002
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantmaximumreport only (MGD)all year002
TU Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)maximum≤ 1 tox acuteall year002
pHminimum≥ 6 SUall year007
pHmaximum≤ 9 SUall year007
Solids, total suspendedmaximumreport only (mg/L)all year007
Copper, dissolved [as Cu]maximumreport only (ug/L)all year007
Zinc, dissolved [as Zn]maximumreport only (ug/L)all year007
Zinc, total recoverablemaximumreport only (ug/L)all year007
Copper, total recoverablemaximumreport only (ug/L)all year007
Precipitation volumeevent totalreport only (Mgal)all year007
pHminimum≥ 6 SUall year011
pHmaximum≤ 9 SUall year011
Solids, total suspendedmaximumreport only (mg/L)all year011
Zinc, total recoverablemaximumreport only (ug/L)all year011
Copper, total recoverablemaximumreport only (ug/L)all year011
Precipitation volumeevent totalreport only (Mgal)all year011
pHminimum≥ 6 SUall year901
pHmaximum≤ 9 SUall year901
Solids, total suspendedmaximumreport only (mg/L)all year901
Zinc, total recoverablemaximumreport only (ug/L)all year901
Copper, total recoverablemaximumreport only (ug/L)all year901
Precipitation volumeevent totalreport only (Mgal)all year901
TU Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia)maximum≤ 1 tox acuteall year901

New limits from Jul 1, 2029

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Copper, total recoverable, maximum32.6 ug/Lnew578 ug/L (3 values)17.7×
Zinc, total recoverable, maximum180 ug/Lnew1220 ug/L (3 values)6.78×

How strict are these limits?

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

Same industry: the 6 Transportation Equipment permits in Virginia.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/VA0073091 · MCP: https://passage-data.com/mcp