| Violation ID |
Occurrence Date |
Violation Type |
Violation Description(-) |
Violation Status |
Priority |
Source |
Facility Name |
Violated Reg. Meas. ID |
Violated Reg. Meas. Order No. |
Linked to Enf. |
| 1150650 |
12/05/2025 |
CTOX |
Chronic Toxicity-Sea Urchin or Sand Dollar-Fertilization Event Discharge limit is 50 % effect and reported value was 97 % effect at M-2. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
459091 |
R9-2023-0012 |
N |
| 1150651 |
11/21/2025 |
Surface Water |
On November 21, 2025, at approximately 1130 hours, an estimated 500 gallons of stormwater from the Pier 12 Storm Water Diversion System (SWDS) discharged into San Diego Bay. The pier coordinator alerted NASSCO Maintenance and Environmental Engineering about a pipe that had disconnected from a pier scupper. Maintenance teams promptly responded, secured the pipe, and stopped the discharge. Environmental Engineering personnel arrived on site to find Maintenance actively working on the pipe and pumping the collected stormwater to the Waste Water Treatment Facility (WWTF). Due to safety concerns regarding the pipe's location on the waterside of the pier wall, Environmental Engineering was unable to collect a sample. However, visual observations revealed no evidence of suspended or floating materials, oil or grease, discoloration, turbidity, odors, trash, debris, or any other pollutants. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
459091 |
R9-2023-0012 |
N |
| 1150652 |
10/03/2025 |
Surface Water |
On October 3, 2025, at approximately 1615 hours, NASSCO Security received a report of 55 gallons of oil spilled on the flight deck of the USNS Sojourner Truth (TAO-6). NASSCO's Fire Department (NFD) responded to the incident and found approximately 50 gallons of hydraulic oil on the flight deck of the TAO-6, which had spilled due to an overfilled 55-gallon drum. The source of the spill was secured, and NFD began containing the spill using rags and absorbent pads. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
459091 |
R9-2023-0012 |
N |
| 1148439 |
08/11/2025 |
Surface Water |
On August 11, 2025 at 0913 hrs, NASSCO Security received a report of a sheen in San Diego Bay adjacent to Berth 6 of approximately 800' x 100'. Security notified NASSCO Fire Department (NFD) and NASSCO Environmental Engineering (EE) to respond to the incident. At the time of the incident, two NASSCO departments were operating vessel systems that had the potential to discharge fuel. EE made regulatory notifications to the Office of Emergency Services (#25-3980), National Response Center (#143-9509), and Regional Water Quality Control Board (voicemail). An oil boom was around the vessel that contained the sheen and NASSCO Waterfront Services (NWF) placed a secondary boom around the sheen to prevent migration. NFD, EE, and WFS conducted an investigation to identify a source of the discharge. NFD nor EE identify any source or evidence of a spill onboard the vessel, NWF used a skiff and diver but did not identify a source within the water or under the vessel. NASSCO continued to monitor the incident, the sheen was not recoverable and dissipated over time. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
459091 |
R9-2023-0012 |
N |
| 1143966 |
05/19/2025 |
Surface Water |
On May 19, 2025, at approximately 1357 hrs, a trace amount of hydraulic fluid entered the Bay from a spill during commissioning test for a piece of hydraulic equipment on the USNS Lucy Stone. After NASSCO Test and Trials employees observed the sheen, they notified NASSCO Security, who initiated spill procedures. NASSCO Environmental Engineering, Fire Department and Waterfront Services were notified of the spill and responded. An unknown amount of material created a light sheen of approximately 10 x 15 feet within the vessel¿s containment boom and was determined to be unrecoverable. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1142111 |
02/11/2025 |
Deficient Reporting |
NASSCO was not able to submit the February SMR prior to the due date. NASSCO collected samples for discharges during the month of February 2025 on February 11, 2025. However, due to excessive rain events during the month of February and an equipment breakdown, the certified analytical laboratory (Certificate No. 1132) was not able to complete the required metals (copper) analysis within a timely manner. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1146673 |
12/16/2024 |
OEV |
pH Instantaneous Minimum limit is 7.0 SU and reported value was 6.9 SU at IX-1. |
Violation |
N |
Report |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1136087 |
10/28/2024 |
Surface Water |
On October 28, 2024, NASSCO Security was notified of an oil sheen at Berth 9/10. NASSCO Fire Department, Waterfront Services, and Environmental Engineering responded. The source of the sheen was determined to be an abandoned hose at the bottom of the Bay that was slowly releasing small amounts of oil to the surface. This incident is an NPDES permit violation and NASSCO notified the following agencies: National Response Center (NRC #1414954), Office of Emergency Services (OES #24-6079), and U.S. Coast Guard, Sector San Diego. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1136088 |
10/24/2024 |
Surface Water |
On October 24, 2024, paint dust was reported in San Diego Bay on the port side of USNS Lucy Stone (575). NASSCO Fire Department, Waterfront Services, and Environmental Engineering responded. The source was determined to be a ventilation hose on the main deck of the Lucy Stone. The source of the dust was secured and the paint dust that entered the Bay was contained within the vessel's boom. The paint dust was not recoverable from the water surface. This incident is a prohibited discharge under NASSCO's NPDES permit. However, the discharge did not exceed a Reportable Quantity (RQ). |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1132898 |
08/02/2024 |
Surface Water |
On August 2, 2024, at approximately 0230 an unknown amount of JP-5 reached the Bay from the USNS Robert F. Kennedy (574). A sheen in San Diego Bay was reported at approximately 6:00 am, Environmental Engineering and NASSCO Fire Department responded to the incident. Responders observed a sheen within the vessel's containment boom. NASSCO's Waterfront Services did not observe any sheen outside of the containment boom. The spill occurred during a fuel transfer, when a tank was over filled due to an open valve causing material to come out of a tank vent, onto the vessel deck, and out a deck drain. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1129975 |
06/20/2024 |
Surface Water |
On June 20, 2024, an oil sheen was reported in San Diego Bay adjacent to USNS Robert F. Kennedy (574). NASSCO Fire Department, Test and Trials, General Services, Waterfront Services, Ship's Management, and Environmental Engineering responded. The source was determined to be oil/fuel spilled onto the Main Deck of T-AO 4. The spill reached a deck drain and was slowly leaking past a drain plug that was not fully seated. The source of the spill was secured, and the sheen was contained within the vessels boom. This incident is an NPDES permit violation, NASSCO notified the following agencies: National Response Center (NRC #1402472), Office of Emergency Services (OES #24-3526), U.S. Coast Guard, and the Regional Water Quality Control Board (RWQCB) (voicemail & notification letter). |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1129165 |
05/15/2024 |
Surface Water |
This incident resulted in an unknown amount of water mixed with residual oil leaking into the Bay from an over water transfer of tank water causing a 60' x 4' sheen. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1144605 |
01/22/2024 |
Deficient Monitoring |
On January 22, 2024, an unknown amount of storm water was discharged to San Diego Bay as an severe rain event of over 4 inches of rainfall (January 20-22, 2024) posed the potential to cause damage to the NASSCO facility. This incident was an unplanned emergency discharge from the facility at the M-2 monitoring location. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1144604 |
01/22/2024 |
Deficient Monitoring |
On January 22, 2024, an unknown amount of storm water was discharged to San Diego Bay as an severe rain event of over 4 inches of rainfall (January 20-22, 2024) posed the potential to cause damage to the NASSCO facility. This incident was an unplanned discharge at the SW-1 monitoring location due to an overflow of the facility containment. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1144603 |
01/22/2024 |
Deficient Monitoring |
On January 22, 2024, an unknown amount of storm water was discharged to San Diego Bay as an severe rain event of over 4 inches of rainfall (January 20-22, 2024) posed the potential to cause damage to the NASSCO facility. This incident was an unplanned discharge at the SW-2 monitoring location due to an overflow of the facility containment. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1124419 |
01/12/2024 |
CTOX |
Chronic Toxicity-Sea Urchin or Sand Dollar-Fertilization Event Discharge limit is 25 % effect and reported value was 98 % effect at M-2. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1144608 |
09/21/2023 |
Surface Water |
On September 21, 2023, an unknown amount of oily water discharged into San Diego Bay from the deck of the USNS Earl Warren. The incident resulted in wash water mixing with residual oil on the mooring of the vessel and an unknown amount washed overboard. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1144607 |
08/22/2023 |
Surface Water |
On August 22, 2023, NASSCO Security was notified of a spill to San Diego Bay from the USNS Earl Warren (T-AO 3) at Berth 2. Approximately 1 gallon of oily storm water overflowed into the Bay from the flight deck TAO-3 mid ship. Due to the storm prediction for Hurricane Hillary, the vessel was not accessible causing storm water to overflow from the vessel deck. The incident resulted in a visible sheen approximately 20 x 40 feet in size. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1120843 |
08/22/2023 |
Surface Water |
On August 22, 2023, NASSCO Security was notified of a spill to San Diego Bay from the USNS Earl Warren (T-AO 3) at Berth 2. Approximately 1 gallon of oily storm water overflowed into the Bay from the flight deck TAO-3 mid ship. Due to the storm prediction for Hurricane Hillary, the vessel was not accessible causing storm water to overflow from the vessel deck. The incident resulted in a visible sheen approximately 20 x 40 feet in size. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1144606 |
07/26/2023 |
Surface Water |
On July 26, 2023, an unknown amount of hydraulic oil spilled from a boomlift from a ruptured hose during startup. The boomlift was located on a test barge when the incident occurred resulting in a small amount of oil to reach San Diego Bay. NASSCO Security notified NASSCO Fire Department (NFD) and Environmental Engineering to respond. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1119467 |
07/26/2023 |
Surface Water |
On July 26, 2023, an unknown amount of hydraulic oil spilled from a boomlift from a ruptured hose during startup. The boomlift was located on a test barge when the incident occurred resulting in a small amount of oil to reach San Diego Bay. NASSCO Security notified NASSCO Fire Department (NFD) and Environmental Engineering to respond. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1118660 |
06/29/2023 |
Surface Water |
On June 29, 2023, NASSCO employees were performing pipe flushing operations onboard a vessel when a gasket on the fuel strainer (filter unit) failed, resulting in approximately 100 gallons of diesel fuel to spill onto the vessel deck. Responders used absorbent pads to keep the majority of the spill to the vessel deck. However, an unknown amount (estimated less than 2 gallons) of material leaked through a plugged deck drain and into San Diego Bay resulting in a sheen of 30' by 5' on the water surface. NASSCO employees immediately secured the source of the spill, placed absorbent pads and materials on the deck, and blocked all deck drains to prevent further discharge. NASSCO also contacted our OSRO who responded to place an absorbent boom into the Bay. This incident is an NPDES permit violation, NASSCO notified the following agencies: National Response Center, Office of Emergency Services, U.S. Coast Guard, and the Regional Water Quality Control Board (RWQCB). |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1118082 |
05/12/2023 |
Surface Water |
On May 12, 2023, a NASSCO Waterfront Services employee was checking the oil on skiff #3 when backpressure in the system caused oil to spurt out of the dipstick nozzle releasing approximately 3 oz. of oil into San Diego Bay. The release of oil into the Bay is a violation of NASSCO's NPDES Permit and reportable to US Coast Guard and Regional Water Quality Control Board. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1113369 |
01/31/2023 |
Surface Water |
On January 31, 2023 at approx. 1040 hrs. NASSCO Security reported a sheen in San Diego Bay adjacent to a vessel located on NASSCO¿s Berth 5. NASSCO Fire Department (NFD), Test and Trials (TNT) and Environmental Engineering responded to the spill location. The initial investigation revealed approximately 4 gallons of JP-5 fuel spilled on the vessel main deck that entered an unsecured deck drain and leaked into San Diego Bay. The spill caused a rainbow sheen approximately 10¿ x 15¿ that was contained within the containment boom around the vessel. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1111389 |
12/21/2022 |
Deficient Monitoring |
Analysis of copper by EPA 1600 series methods could not be performed by due date for IX-1 and RW due to laboratory instrument failure. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1106291 |
06/08/2022 |
Surface Water |
On June 8, 2022 at approx. 0829 hrs. NASSCO Security reported a sheen in San Diego Bay adjacent to a vessel located on NASSCO¿s Berth 5. NASSCO Fire Department (NFD) and Environmental Engineering responded to the spill location. The spill caused a thin rainbow sheen approximately 30¿ x 30¿ that was contained within the containment boom around the vessel. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1105961 |
05/16/2022 |
CTOX |
Chronic Toxicity Maximum Daily (MDEL) limit is 0 Pass/Fail (Pass = 0, Fail = 1) and reported value was 1 Pass/Fail (Pass = 0, Fail = 1) at M-2. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1100501 |
01/31/2022 |
Late Report |
Monthly SMR ( MONRPT ) report for December 2021 (1865465) was due on 30-JAN-22 |
Violation |
None |
Report |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1100500 |
01/31/2022 |
Late Report |
Semi-Annual SMR ( MONRPT ) report for H2 2021 (1865472) was due on 30-JAN-22 |
Violation |
None |
Report |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1099026 |
12/31/2021 |
Late Report |
Monthly SMR ( MONRPT ) report for November 2021 (1865464) was due on 30-DEC-21 |
Violation |
None |
Report |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1096463 |
10/31/2021 |
Late Report |
Quarterly SMR ( MONRPT ) report for Q3 2021 (1865469) was due on 30-OCT-21 |
Violation |
None |
Report |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
| 1089853 |
04/14/2021 |
Surface Water |
On April 14, 2021 at 1122 hrs., NASSCO Security received a report of a 20 ft. x 20 ft. orange discoloration in the San Diego Bay near Pier 12, the discoloration was a result of dewatering a NASSCO barge that was moored at Pier 12. The barge dewatering was immediately secured once the operator became aware of the rust water and reported the incident. Approximately 50 gallons of rust water was discharged. The incident is a prohibited discharge under NASSCO's NPDES permit. However, the discharge did not exceed a Reportable Quantity (RQ) and did not endanger health or the environment. |
Violation |
N |
eSMR |
National Steel & Shipbuilding Co (NASSCO) |
408359 |
R9-2016-0116 |
N |
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