| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1131406 |
11/13/2023 |
CAT2 |
Nickel, Total Recoverable Maximum Daily (MDEL) limit is 13.6 ug/L and reported value was 16 ug/L at NGD-003. |
Following receipt of the monitoring results, the caisson ballast tank was evaluated for additional sources of nickel. Based on the evaluation, no uncontrolled sources of nickel were identified. During the November 13, 2023, event a special study nickel sample was collected at INT-001. The nickel concentration for the INT-001 sample was 22 ug/L, which is higher than the NGD-003 concentration of 16 ug/L. The nickel concentration of 22 ug/L in the sample collected at INT-001 during this event matches the average nickel concentration for samples collected at INT-001 for the past several years. This suggests that the source water (San Diego Bay) is a major source of nickel in the NGD-003 discharge. SWRMC will continue to assess the caisson ballast tank for potential sources of nickel. |
Violation |
U |
eSMR |
| 1112918 |
12/22/2022 |
CAT2 |
Copper, Total Recoverable Maximum Daily (MDEL) limit is 13.8 ug/L and reported value was 50.0 ug/L at NGD-001 & 002. |
Analytical results for samples collected from monitoring location NGD-001 detected concentrations over the NBSD Permit maximum daily effluent limitation for copper. The results were evaluated and it was noted on the effluent monitoring observation form that the primary pump used for collecting the sample at NGD-001 failed shortly into sampling efforts. A backup peristaltic pump was used, however, because of the low flow rate of the backup pump; much of the sample volume was collected when the NGD floodwater had made contact with the hull of the ship. Both total suspended solids and settleable solids, which provide measures of particulates in a discharge and reflect the ability of a facility to control particle bound pollutants, were non-detect. Based on a review of past results, the copper concentrations of NGD-001 samples collected after contact with the hull of the ship are typically higher than samples collected prior to contact. Based on the solids results from this event, past copper results, and timing of sample collection during this event, SWRMC believes that the elevated copper concentration at NGD-001 during this event does not reflect the effectiveness of its BMPs. SWRMC will continue to investigate other potential sources of copper |
Violation |
U |
eSMR |
| 1119630 |
08/29/2022 |
CAT2 |
Nickel, Total Recoverable Maximum Daily (MDEL) limit is 13.6 ug/L and reported value was 23 ug/L at NGD-003. |
Following receipt of the monitoring results, the caisson ballast tank was evaluated for additional sources of nickel. Based on the evaluation, no uncontrolled sources of nickel were identified. A review of intake sample results collected from San Diego Bay during the August 29, 2022 sampling event, suggest that a significant source of the nickel in the NGD-003 discharge is from the source water (San Diego Bay). SWRMC will continue to assess the caisson ballast tank for potential sources of nickel. |
Violation |
U |
eSMR |
| 1119629 |
08/29/2022 |
CAT2 |
Nickel, Total Recoverable Monthly Average limit is 6.8 ug/L and reported value was 41 ug/L at NGD-004. |
Following receipt of the monitoring results, the NGD emergency fire suppression and salt water supply system was evaluated to determine sources of elevated nickel in the discharge. Based on the evaluation, no uncontrolled sources of nickel were identified. A review of intake sample results collected from San Diego Bay during the August 29, 2022 sampling event, suggest that a significant source of the nickel in the NGD-004 discharge is from the source water (San Diego Bay). The fire suppression
and salt water supply system underwent repairs during the 2021-2022 monitoring period. Repairs were complete in June 2022. SWRMC will continue to assess the emergency fire suppression and salt water supply system for potential sources of nickel. |
Violation |
U |
eSMR |
| 1107595 |
06/08/2022 |
CAT2 |
Nickel, Total Recoverable Monthly Average limit is 6.8 ug/L and reported value was 20 ug/L at NGD-004. |
Following receipt of the monitoring results, the NGD emergency fire suppression and salt water supply system was evaluated to determine sources of elevated nickel in the discharge. Based on the evaluation, no uncontrolled sources of nickel were identified. A review of intake sample results from samples collected from San Diego Bay during the June 8, 2022, sampling event suggest that a significant source of the nickel in the NGD 004 discharge is from the source water (San Diego Bay). The fire suppression and salt water supply system underwent repairs during the 2021-2022 monitoring period. Repairs were completed in June 2022. SWRMC will continue to assess the fire suppression and salt water supply system for potential sources of nickel. |
Violation |
U |
eSMR |
| 1107596 |
02/02/2022 |
CAT2 |
Copper, Total Recoverable Maximum Daily (MDEL) limit is 13.8 ug/L and reported value was 40 ug/L at NGD-003. |
Following receipt of the monitoring results, the data was evaluated and it was noted on the effluent monitoring observation form that a portion of the sample contained sediment and appeared cloudy, which may have impacted the copper results. The caisson was evaluated for additional sources of copper however no sources could be identified. SWRMC will continue to assess the caisson ballast tank for potential sources of copper. |
Violation |
U |
eSMR |
| 1107594 |
02/02/2022 |
CAT2 |
Nickel, Total Recoverable Maximum Daily (MDEL) limit is 13.6 ug/L and reported value was 16.0 ug/L at NGD-003. |
Following receipt of the monitoring results, the caisson was evaluated to determine sources of elevated nickel in the discharge. Based on the evaluation, no uncontrolled sources of nickel were identified. A review of intake sample results from samples collected from San Diego Bay during the June 8, 2022, sampling event suggest that a significant source of the nickel in the NGD 003 discharge is from the source water (San Diego Bay). SWRMC will continue to assess the caisson ballast tank for potential sources of nickel. |
Violation |
U |
eSMR |
| 1107597 |
02/02/2022 |
CAT2 |
Zinc, Total Recoverable Maximum Daily (MDEL) limit is 95.1 ug/L and reported value was 470 ug/L at NGD-003. |
Following receipt of the monitoring results, the data was evaluated and it was noted on the effluent monitoring observation form that a portion of the sample contained sediment and appeared cloudy, which may have impacted the zinc results. The caisson was evaluated for additional sources of zinc, however, no sources could be identified. All zinc anodes were replaced with aluminum within the caisson at the time of the last overhaul. SWRMC will continue to assess the caisson ballast tank for potential sources of zinc. |
Violation |
U |
eSMR |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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