Clean Water Act discharge permit · NPDES VA0073091
GENERAL DYNAMICS NASSCO-NORFOLK - LIGON FACILITY, Norfolk, VA: NPDES VA0073091 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 14Pollutants under a numeric limit
- 6Pollutants with an effluent exceedance
GENERAL DYNAMICS NASSCO-NORFOLK - LIGON FACILITY, held by Metro Machine Corp dba General Dynamics NASSCO-Nor, holds NPDES permit VA0073091, which discharges to Southern Branch Elizabeth River-Deep Creek. EPA’s file records it issued May 22, 2020 and expiring May 31, 2025. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | GENERAL DYNAMICS NASSCO-NORFOLK - LIGON FACILITY |
|---|---|
| Permittee as filed | Metro Machine Corp dba General Dynamics NASSCO-Nor |
| NPDES ID | VA0073091 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | May 22, 2020 |
| Expiration date | May 31, 2025 |
| Issuing agency | VA DEQ |
| Address | Norfolk, VA 23523 |
| Receiving water | Southern Branch Elizabeth River-Deep Creek |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Deep Creek-Southern Branch Elizabeth River (HUC 020802080203) |
| NAICS | 336611 – Ship Building and Repairing |
| SIC | 3731 – Ship Building And Repairing |
| Other EPA IDs (FRS) | RCRA handler VAP603201310; ICIS-AIR source VA0000005171000034 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 15Pollutants on file
- 14Under a numeric limit
- 10With a violation of any kind
- 6With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, total suspended | 5 | 14 | 8 | May 31, 2019 | 138% over the limit |
| Petrol hydrocarbons, total recoverable | 5 | 8 | 7 | July 31, 2021 | 275% over the limit |
| pH | 10 | 14 | 2 | June 30, 2016 | |
| Copper, total recoverable | 4 | 3 | 2 | September 30, 2025 | 32% over the limit |
| Zinc, total recoverable | 4 | 2 | 1 | September 30, 2025 | 6% over the limit |
| TU Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 0 | 1 | 1 | September 30, 2025 | 39% over the limit |
| Copper, dissolved [as Cu] | 1 | 6 | 0 | ||
| Zinc, dissolved [as Zn] | 1 | 6 | 0 | ||
| Precipitation volume | 3 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 3 | 1 | 0 | ||
| Temperature, water deg. centigrade | 1 | 0 | 0 | ||
| Nitrogen, total [as N] | 1 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 1 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 1 | 0 | 0 | ||
| Phosphorus, total [as P] | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES VA0073091.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID VA0073091 there.
Nearby on the register
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- Every permit record in Virginia, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.