| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1124323 |
10/31/2023 |
OEV |
Acrylamide Monthly Average limit is 0.05 ug/L and reported value was 0.096 ug/L at M-002. |
Based on discussion, we found that the laboratory, Weck, performs an MDL study for this analysis once per year in January. In February 2022, the MDL changed from 0.021 ug/L to 0.069 ug/L. The MDL remained at 0.069 ug/L through December 2023. The MDL study for January 2024 resulted in an MDL of 0.042 ug/L, which is below the discharge limitation. Therefore, the MDL for acrylamide will likely remain below the discharge limits for the remainder of 2024. Since Aerojet began analyzing samples for acrylamide, the MDL had been 0.021 ug/L until February 2022. Other than this detection in October 2023, acrylamide was not detected in samples collected since February 2022.
|
Violation |
B |
eSMR |
| 1124324 |
10/31/2023 |
OEV |
pH Instantaneous Minimum limit is 6.5 SU and reported value was 5.94 SU at M-012. |
During similar ion exchange rinsate discharges to M-012 in the future, the sample coordination team will ensure the sampler immediately calls the team upon determination of a potential pH violation. As is routinely done for all other discharges, the team will check the calibration of the pH instrument and remeasure the pH to confirm the initial reading. If a violation is confirmed, the CVRWQCB will be notified and the violation will be reported according to the requirements of the Permit. Geosyntec is working to improve the field data syncing process with the database in order to restore the normal enhanced notification of potential permit violations. |
Violation |
U |
eSMR |
| 1124325 |
10/04/2023 |
OEV |
Acrylamide Daily Maximum limit is 0.05 ug/L and reported value was 0.096 ug/L at M-002. |
Based on discussion, we found that the laboratory, Weck, performs an MDL study for this analysis once per year in January. In February 2022, the MDL changed from 0.021 ug/L to 0.069 ug/L. The MDL remained at 0.069 ug/L through December 2023. The MDL study for January 2024 resulted in an MDL of 0.042 ug/L, which is below the discharge limitation. Therefore, the MDL for acrylamide will likely remain below the discharge limits for the remainder of 2024. Since Aerojet began analyzing samples for acrylamide, the MDL had been 0.021 ug/L until February 2022. Other than this detection in October 2023, acrylamide was not detected in samples collected since February 2022.
|
Violation |
U |
eSMR |
| 1121789 |
09/07/2023 |
ATOX |
Acute Toxicity-Fathead Minnow-survival Daily Minimum limit is 70 % survival and reported value was 35 % survival at M-009. *** MMP Exempt Reason:The Discharger already have effluent Limitation against toxic chemials. |
Following identification of the exceedance, robust validation was performed, which is included in Attachment 6 on CIWQS. The review confirmed that there were no quality control issues with the laboratory analysis and the result was determined to be valid. The permit requires that the Discharger notify the Central Valley Regional Water Quality Control Board (CVRWQCB) within 24-hours after the receipt of test results exceeding acute toxicity effluent limitation. This notification was completed by Aerojet on September 19, 2023. The cause of the low fathead minnow survival is unknown, as all of the routine required chemical parameters analyzed in September 2023 were compliant with the permit limits. Prior to September 2023, fathead minnow survival has always been high and compliant with the permit; therefore, the low survival in September 2023 is anomalous. Acute toxicity will continue to be evaluated at this location in accordance with the permit to ensure fathead minnow survival is high and compliant with the permit. |
Violation |
B |
eSMR |
| 1118447 |
05/31/2023 |
CAT2 |
Acetaldehyde Monthly Average limit is 5 ug/L and reported value was 6.5 ug/L at M-002. |
Aerojet continues to collect samples throughout the treatment process each month during NPDES sampling and analyzes each for acetaldehyde. As acetaldehyde is not present in the GET EF influent, it appears to be generated following the fluidized bed reactor and before the air strippers. It is not generated consistently and has not been able to be replicated for testing. Aerojet is working with academia to better understand the precursors to acetaldehyde formation. One possible process is the reaction of ethanol with total organic carbon (TOC) during advanced oxidation processes, which Aerojet uses for the destruction of n-nitrosodimethylamine. Aerojet is planning to install an in-line TOC analyzer, capable of measuring TOC concentration every few minutes. This acute monitoring of TOC will provide a way to evaluate TOC during changes to the fluidized bed process, which may lead to a better understanding of acetaldehyde formation. |
Violation |
B |
eSMR |
| 1118446 |
05/02/2023 |
CAT2 |
Acetaldehyde Daily Maximum limit is 5 ug/L and reported value was 6.5 ug/L at M-002. |
Aerojet continues to collect samples throughout the treatment process each month during NPDES sampling and analyzes each for acetaldehyde. As acetaldehyde is not present in the GET EF influent, it appears to be generated following the fluidized bed reactor and before the air strippers. It is not generated consistently and has not been able to be replicated for testing. Aerojet is working with academia to better understand the precursors to acetaldehyde formation. One possible process is the reaction of ethanol with total organic carbon (TOC) during advanced oxidation processes, which Aerojet uses for the destruction of n-nitrosodimethylamine. Aerojet is planning to install an in-line TOC analyzer, capable of measuring TOC concentration every few minutes. This acute monitoring of TOC will provide a way to evaluate TOC during changes to the fluidized bed process, which may lead to a better understanding of acetaldehyde formation. |
Violation |
U |
eSMR |
| 1117816 |
04/30/2023 |
CAT2 |
Acetaldehyde Monthly Average limit is 0.51 lb/day and reported value was 1.58 lb/day at M-002. |
Acetaldehyde is not present in the GET EF influent. It appears to be generated following the fluidized bed reactor and before the air strippers. It is not generated consistently and has not been able to be replicated for testing. Aerojet continues to collect samples throughout the treatment process each month during NPDES sampling and analyzes each for acetaldehyde. Aerojet is working with academia to better understand the precursors to acetaldehyde formation. One possible process is the reaction of ethanol with total organic carbon (TOC) during advanced oxidation processes, which Aerojet uses for the destruction of NDMA. Aerojet is planning to install an in-line TOC analyzer, capable of measuring TOC concentration every few minutes. This acute monitoring of TOC will provide a way to evaluate TOC during changes to the fluidized bed process, which may lead to a better understanding of acetaldehyde formation. |
Violation |
B |
eSMR |
| 1117815 |
04/30/2023 |
CAT2 |
Acetaldehyde Monthly Average limit is 5 ug/L and reported value was 26 ug/L at M-002. |
Acetaldehyde is not present in the GET EF influent. It appears to be generated following the fluidized bed reactor and before the air strippers. It is not generated consistently and has not been able to be replicated for testing. Aerojet continues to collect samples throughout the treatment process each month during NPDES sampling and analyzes each for acetaldehyde. Aerojet is working with academia to better understand the precursors to acetaldehyde formation. One possible process is the reaction of ethanol with total organic carbon (TOC) during advanced oxidation processes, which Aerojet uses for the destruction of NDMA. Aerojet is planning to install an in-line TOC analyzer, capable of measuring TOC concentration every few minutes. This acute monitoring of TOC will provide a way to evaluate TOC during changes to the fluidized bed process, which may lead to a better understanding of acetaldehyde formation. |
Violation |
B |
eSMR |
| 1117817 |
04/26/2023 |
CAT2 |
Acetaldehyde Daily Maximum limit is 0.51 lb/day and reported value was 1.60 lb/day at M-002. |
Acetaldehyde is not present in the GET EF influent. It appears to be generated following the fluidized bed reactor and before the air strippers. It is not generated consistently and has not been able to be replicated for testing. Aerojet continues to collect samples throughout the treatment process each month during NPDES sampling and analyzes each for acetaldehyde. Aerojet is working with academia to better understand the precursors to acetaldehyde formation. One possible process is the reaction of ethanol with total organic carbon (TOC) during advanced oxidation processes, which Aerojet uses for the destruction of NDMA. Aerojet is planning to install an in-line TOC analyzer, capable of measuring TOC concentration every few minutes. This acute monitoring of TOC will provide a way to evaluate TOC during changes to the fluidized bed process, which may lead to a better understanding of acetaldehyde formation. |
Violation |
U |
eSMR |
| 1117813 |
04/26/2023 |
CAT2 |
Acetaldehyde Daily Maximum limit is 5 ug/L and reported value was 26 ug/L at M-002. |
Acetaldehyde is not present in the GET EF influent. It appears to be generated following the fluidized bed reactor and before the air strippers. It is not generated consistently and has not been able to be replicated for testing. Aerojet continues to collect samples throughout the treatment process each month during NPDES sampling and analyzes each for acetaldehyde. Aerojet is working with academia to better understand the precursors to acetaldehyde formation. One possible process is the reaction of ethanol with total organic carbon (TOC) during advanced oxidation processes, which Aerojet uses for the destruction of NDMA. Aerojet is planning to install an in-line TOC analyzer, capable of measuring TOC concentration every few minutes. This acute monitoring of TOC will provide a way to evaluate TOC during changes to the fluidized bed process, which may lead to a better understanding of acetaldehyde formation. |
Violation |
U |
eSMR |
| 1117814 |
04/04/2023 |
CAT2 |
Tetrachloroethene Daily Maximum limit is 0.7 ug/L and reported value was 0.8 ug/L at M-007. |
Aerojet determined that air was being introduced into the suction side of a newly installed hydrogen peroxide pump. The air purging process stops the flow of hydrogen peroxide to the influent water until the air is purged. The air leak was repaired, which eliminated the air purging process. |
Violation |
U |
eSMR |
| 1115796 |
02/02/2023 |
OEV |
pH Instantaneous Maximum limit is 8.5 SU and reported value was 8.6 SU at M-001. |
|
Violation |
B |
Report |
| 1115797 |
02/02/2023 |
OEV |
pH Instantaneous Maximum limit is 8.5 SU and reported value was 8.64 SU at M-017. |
|
Violation |
B |
Report |
| 1115795 |
02/02/2023 |
CAT2 |
Copper, Total Recoverable Daily Maximum limit is 0.7 mg/L and reported value was 0.87 mg/L at M-019. |
|
Violation |
B |
Report |
| 1116119 |
09/30/2022 |
CAT2 |
Acetaldehyde Monthly Average limit is 0.51 lb/day and reported value was .79 lb/day at M-002. |
Aerojet continues to collect samples throughout the treatment process each month during NPDES sampling. If the effluent sample contains acetaldehyde at a concentration greater than the effluent discharge limitation, the remaining samples are analyzed for acetaldehyde and the effluent is resampled. To date, when the effluent sample has contained acetaldehyde at a concentration above the discharge limitation, the resample of the effluent has always been below the effluent discharge limitation. In other words, the exceedance has not been repeated. This limits the ability to conduct root cause analyses. |
Violation |
B |
eSMR |
| 1116120 |
09/30/2022 |
CAT2 |
Acetaldehyde Monthly Average limit is 5 ug/L and reported value was 15 ug/L at M-002. |
Aerojet continues to collect samples throughout the treatment process each month during NPDES sampling. If the effluent sample contains acetaldehyde at a concentration greater than the effluent discharge limitation, the remaining samples are analyzed for acetaldehyde and the effluent is resampled. To date, when the effluent sample has contained acetaldehyde at a concentration above the discharge limitation, the resample of the effluent has always been below the effluent discharge limitation. In other words, the exceedance has not been repeated. This limits the ability to conduct root cause analyses. |
Violation |
B |
eSMR |
| 1110028 |
09/09/2022 |
CAT2 |
Acetaldehyde Daily Maximum limit is 0.51 lb/day and reported value was 0.91 lb/day at M-002. |
Aerojet continues to collect samples throughout the treatment process each month during NPDES sampling. If the effluent sample contains acetaldehyde at a concentration greater than the effluent discharge limitation, the remaining samples are analyzed for acetaldehyde and the effluent is resampled. To date, when the effluent sample has contained acetaldehyde at a concentration above the discharge limitation, the resample of the effluent has always been below the effluent discharge limitation. In other words, the exceedance has not been repeated. This limits the ability to conduct root cause analyses. |
Violation |
B |
eSMR |
| 1110029 |
09/09/2022 |
CAT2 |
Acetaldehyde Daily Maximum limit is 5 ug/L and reported value was 15 ug/L at M-002. |
Aerojet continues to collect samples throughout the treatment process each month during NPDES sampling. If the effluent sample contains acetaldehyde at a concentration greater than the effluent discharge limitation, the remaining samples are analyzed for acetaldehyde and the effluent is resampled. To date, when the effluent sample has contained acetaldehyde at a concentration above the discharge limitation, the resample of the effluent has always been below the effluent discharge limitation. In other words, the exceedance has not been repeated. This limits the ability to conduct root cause analyses.
|
Violation |
B |
eSMR |
| 1109203 |
08/03/2022 |
CAT2 |
Acetaldehyde Daily Maximum limit is 0.51 lb/day and reported value was 0.65 lb/day at M-002. |
AR continues to collect samples throughout the treatment process each month during NPDES sampling. If the effluent sample contains acetaldehyde at a concentration greater than the effluent discharge limitation, the remaining samples are analyzed for acetaldehyde and the effluent is resampled. To date, when the effluent sample has contained acetaldehyde at a concentration above the discharge limitation, the resample of the effluent has always been below the effluent discharge limitation. In other words, the exceedance has not been repeated. This limits the ability to conduct root cause analyses. |
Violation |
B |
eSMR |
| 1109204 |
08/03/2022 |
CAT2 |
Acetaldehyde Daily Maximum limit is 5 ug/L and reported value was 11 ug/L at M-002. |
AR continues to collect samples throughout the treatment process each month during NPDES sampling. If the effluent sample contains acetaldehyde at a concentration greater than the effluent discharge limitation, the remaining samples are analyzed for acetaldehyde and the effluent is resampled. To date, when the effluent sample has contained acetaldehyde at a concentration above the discharge limitation, the resample of the effluent has always been below the effluent discharge limitation. In other words, the exceedance has not been repeated. This limits the ability to conduct root cause analyses. |
Violation |
B |
eSMR |
| 1107099 |
06/02/2022 |
CAT2 |
Acetaldehyde Daily Maximum limit is 5 ug/L and reported value was 8 ug/L at M-002. |
Acetaldehyde is typically present in the effluent of the GET EF system at a concentration between 1-4ug/L. Sporadically, the concentration exceeds 5ug/L (the effluent discharge limitation). The last time this occurred was in May 2021. At that time, AR conducted a thorough root cause analysis. Since the concentration of acetaldehyde did not exceed the effluent discharge limitation during root cause analysis, AR could not identify the root cause for the elevated acetaldehyde concentration in the effluent. While this analysis did not identify a root cause, it did identify that acetaldehyde forms after hydrogen peroxide dosing and within the UV reactors. Following this process, the concentration of acetaldehyde decreases through the air strippers and along the effluent pipeline to the outfall.
AR continues to collect samples throughout the treatment process each month during NPDES sampling. If the effluent sample contains acetaldehyde at a concentration greater than the effluent discharge limitation, the remaining samples are analyzed for acetaldehyde and the effluent is resampled. To date, when the effluent sample has contained acetaldehyde at a concentration above the discharge limitation, the resample of the effluent has always been below the effluent discharge limitation. In other words, the exceedance has not been repeated. This limits the ability to conduct root cause analyses. |
Violation |
B |
eSMR |
| 1104129 |
10/05/2021 |
OEV |
pH Instantaneous Maximum limit is 8.5 SU and reported value was 9.11 SU at M-009. |
None |
Violation |
B |
Report |
| 1091769 |
05/31/2021 |
CAT2 |
Acetaldehyde Monthly Average limit is 5 ug/L and reported value was 30 ug/L at M-002. |
The June 2021 monthly compliance sample for M-002 for acetaldehyde was below the permit discharge limit. The 30 ug/L acetaldehyde in the 5 May 2021 sample appears to be anomalous. Diagnostic sampling of the treatment process is being performed in an attempt to identify the root cause. Acetaldehyde is not present in the influent to the treatment system and, as such, the treatment system is not designed to remove acetaldehyde. |
Violation |
B |
eSMR |
| 1091767 |
05/05/2021 |
CAT2 |
Acetaldehyde Daily Maximum limit is 0.51 lb/day and reported value was 1.85 lb/day at M-002. |
The June 2021 monthly compliance sample for M-002 for acetaldehyde was below the permit discharge limit. The 30 ug/L acetaldehyde in the 5 May 2021 sample appears to be anomalous. Diagnostic sampling of the treatment process is being performed in an attempt to identify the root cause. Acetaldehyde is not present in the influent to the treatment system and, as such, the treatment system is not designed to remove acetaldehyde. |
Violation |
B |
eSMR |
| 1091768 |
05/05/2021 |
CAT2 |
Acetaldehyde Daily Maximum limit is 5 ug/L and reported value was 30 ug/L at M-002. |
The June 2021 monthly compliance sample for M-002 for acetaldehyde was below the permit discharge limit. The 30 ug/L acetaldehyde in the 5 May 2021 sample appears to be anomalous. Diagnostic sampling of the treatment process is being performed in an attempt to identify the root cause. Acetaldehyde is not present in the influent to the treatment system and, as such, the treatment system is not designed to remove acetaldehyde. |
Violation |
B |
eSMR |
| 1091766 |
05/05/2021 |
CAT2 |
Acetaldehyde Monthly Average limit is 0.51 lb/day and reported value was 1.81 lb/day at M-002. |
The June 2021 monthly compliance sample for M-002 for acetaldehyde was below the permit discharge limit. The 30 ug/L acetaldehyde in the 5 May 2021 sample appears to be anomalous. Diagnostic sampling of the treatment process is being performed in an attempt to identify the root cause. Acetaldehyde is not present in the influent to the treatment system and, as such, the treatment system is not designed to remove acetaldehyde. |
Violation |
B |
eSMR |
| 1085855 |
12/01/2020 |
DMON |
Samples for PROWL (pendimethalin) analysis were mistakenly not collected in December 2020. The previous version of the NPDES permit had a quarterly requirement for PROWL sampling, whereas the new NPDES permit (adopted in November 2020) has a monthly sampling requirement. The RWQCB has acknowledged that the change to analyzing GET EF influent monthly samples for PROWL was not intended and it has been in the process of modifying the new permit to correct this inaccuracy. Until the RWQCB corrects this inaccuracy, AR has added PROWL to the monthly NPDES analyte list and updated the sampling program. |
As a corrective action, until the RWQCB corrects this inaccuracy, AR has added PROWL to the monthly NPDES analyte list and updated the sampling program. |
Violation |
U |
eSMR |
| 1093890 |
01/31/2020 |
CAT2 |
N-Nitrosodimethylamine Daily Maximum limit is 10 ng/L and reported value was 12 ng/L at M-016. |
After completing a UV treatment pilot study at GET AB, it was found that one of the valves was not properly seated, resulting in partial bypass of UV treatment and NDMA being detected in the effluent. The valve in question was subsequently exercised and properly seated. |
Violation |
B |
eSMR |
| 1071703 |
01/23/2020 |
CAT2 |
N-Nitrosodimethylamine Daily Maximum limit is 10 ng/L and reported value was 12 ng/L at M-016. |
After completing a UV treatment pilot study at GET AB, it was found that one of the valves was not properly seated, resulting in partial bypass of UV treatment and NDMA being detected in the effluent. The valve in question was subsequently exercised and properly seated. |
Violation |
B |
eSMR |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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