Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
1132153 |
08/21/2024 |
OEV |
pH Instantaneous Maximum limit is 9 SU and reported value was 9.34 SU at M-INTB2. |
Facility is planning to clean the basin during Q3/Q4 2024. |
Violation |
U |
eSMR |
1131299 |
07/24/2024 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.54 SU at M-INTB2. |
Facility is planning to conduct the basin cleaning during Q3/Q4 2024. |
Violation |
U |
eSMR |
1131300 |
07/24/2024 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 10.9 lb/day and reported value was 16.5 lb/day at M-INTB2. |
Facility is planning to conduct the basin cleaning during Q3/Q4 2024. |
Violation |
U |
eSMR |
1131301 |
07/24/2024 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30 mg/L and reported value was 45.2 mg/L at M-INTB2. |
Facility is planning to conduct the basin cleaning during Q3/Q4 2024. |
Violation |
U |
eSMR |
1130064 |
06/05/2024 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.45 SU at M-INTB2. |
Facility is planning to conduct the basin cleaning during the summer of 2024. |
Violation |
U |
eSMR |
1129072 |
05/14/2024 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.34 SU at M-INTB2. |
Facility is planning to conduct the basin cleaning during the summer of 2024. |
Violation |
U |
eSMR |
1129073 |
05/14/2024 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.42 SU at M-INTB1. |
Facility will continue to evaluate elevated pH readings. |
Violation |
U |
eSMR |
1128215 |
04/23/2024 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.59 SU at M-INTB2. |
Facility is planning to conduct the basin cleaning during the summer of 2024. |
Violation |
U |
eSMR |
1128214 |
04/23/2024 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 13.2 lb/day and reported value was 17.6 lb/day at M-INTB2. |
Facility is planning to conduct the basin cleaning during the summer of 2024. |
Violation |
U |
eSMR |
1128213 |
04/23/2024 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30 mg/L and reported value was 40.0 mg/L at M-INTB2. |
Facility is planning to conduct the basin cleaning during the summer of 2024. |
Violation |
U |
eSMR |
1126586 |
03/04/2024 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.14 SU at M-INTB1. |
Facility will continue to evaluate elevated pH readings. |
Violation |
U |
eSMR |
1126587 |
03/04/2024 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.42 SU at M-INTB2. |
Facility will continue to evaluate elevated pH readings. |
Violation |
U |
eSMR |
1123578 |
12/17/2023 |
Order Conditions |
Temp Diff b/n Intake and Discharge Instantaneous Maximum limit is 30.0 Degrees C and reported value was 31.6 Degrees C at M-001. |
Operator initiated the second circ pump immediately upon receiving the elevated temperature indication alarm in the control room. |
Violation |
U |
eSMR |
1122294 |
10/30/2023 |
DMON |
pH measurements outside the acceptable range for relative percent difference (RPD) of 0.1 pH unit |
Remind analysts of the acceptable RPD range for pH. |
Violation |
U |
eSMR |
1121426 |
09/20/2023 |
DMON |
Samples were collected per the NPDES permit requirement. Cross contamination occurred during the laboratory analysis and results of the analysis were received too late to conduct a second sample within the same month. |
When possible, collect sample earlier in the month to allow time to take a second sample if necessary. |
Violation |
U |
eSMR |
1121427 |
09/20/2023 |
DMON |
Samples were collected per the NPDES permit requirement. Cross contamination occurred during the laboratory analysis and results of the analysis were received too late to conduct a second sample within the same month. |
When possible, collect sample earlier in the month to allow time to take a second sample if necessary. |
Violation |
U |
eSMR |
1121428 |
09/20/2023 |
DMON |
Samples were collected per the NPDES permit requirement. Cross contamination occurred during the laboratory analysis and results of the analysis were received too late to conduct a second sample within the same month. |
When possible, collect sample earlier in the month to allow time to take a second sample if necessary. |
Violation |
U |
eSMR |
1120670 |
08/29/2023 |
OEV |
pH Instantaneous Maximum limit is 9 SU and reported value was 9.2 SU at M-INTB2. |
Facility will continue to evaluate elevated pH readings. |
Violation |
U |
eSMR |
1120669 |
08/29/2023 |
OEV |
pH Instantaneous Maximum limit is 9 SU and reported value was 9.96 SU at M-INTB1. |
Facility will continue to evaluate elevated pH readings. |
Violation |
U |
eSMR |
1120668 |
08/29/2023 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30 mg/L and reported value was 33.8 mg/L at M-INTB1. |
Facility will monitor elevated TSS levels to determine if elevated trend is emerging. |
Violation |
U |
eSMR |
1119737 |
07/24/2023 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.24 SU at M-INTB1. |
Facility continues to research elevated pH levels. |
Violation |
U |
eSMR |
1118246 |
05/08/2023 |
DMON |
Delta between duplicate samples was greater than 0.1 pH unit. |
Review results with technician and conduct additional training. |
Violation |
U |
eSMR |
1116891 |
04/19/2023 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.50 SU at M-INTB1. |
Site continues to monitor the pH and research possible methods for addressing the issue. |
Violation |
U |
eSMR |
1111627 |
11/22/2022 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.05 SU at M-INTB1. |
Facility continues to research pH management strategies. |
Violation |
U |
eSMR |
1111626 |
11/22/2022 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.13 SU at M-INTB2. |
Facility continues to research pH management strategies. |
Violation |
U |
eSMR |
1110872 |
10/31/2022 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.08 SU at M-INTB2. |
Site continues to research potential options to control the pH levels. |
Violation |
U |
eSMR |
1110871 |
10/31/2022 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.47 SU at M-INTB1. |
Site continues to research potential options to control the pH levels. |
Violation |
U |
eSMR |
1109495 |
09/15/2022 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.13 SU at M-INTB2. |
Site continues to research source of elevated pH and identify corrective actions. |
Violation |
U |
eSMR |
1108791 |
08/16/2022 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.36 SU at M-INTB1. |
Continue research to determine if source of elevated pH is algae growth in the basin. |
Violation |
U |
eSMR |
1107764 |
07/25/2022 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.95 SU at M-INTB1. |
Continue to monitor and evaluate need for further actions based on trend. |
Violation |
U |
eSMR |
1106601 |
06/08/2022 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.14 SU at M-INTB2. |
Continue to monitor and evaluate need for further actions based on trend. |
Violation |
U |
eSMR |
1105847 |
05/12/2022 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.4 SU at M-INTB2. |
Continue to monitor and evaluate need for further actions based on trend. |
Violation |
U |
eSMR |
1104660 |
04/11/2022 |
DMON |
Circulating water flow was reversed at the time of sampling at M-001 sampling point. As a result, M-001 samples collected were representative of the facility intake. |
Confirm circulating gates are configured so that the results are representative of the facility outfall prior to sampling at M-001 . |
Violation |
U |
eSMR |
1104661 |
04/11/2022 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.18 SU at M-INTB1. |
Continue to monitor pH. |
Violation |
U |
eSMR |
1094709 |
08/03/2021 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.27 SU at M-INTB1. |
Basin cleaning was initiated at the end of August and will continue into Q4 2021. |
Violation |
U |
eSMR |
1094710 |
08/03/2021 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30 mg/L and reported value was 35.5 mg/L at M-INTB1. |
Basin cleaning was initiated at the end of August and will continue into Q4 2021. |
Violation |
U |
eSMR |
1093408 |
07/08/2021 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.69 SU at M-INTB1. |
AES is planning to initiate basin cleaning efforts to address the elevated pH levels. |
Violation |
U |
eSMR |
1092558 |
06/03/2021 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.7 SU at M-INTB1. |
Continue to monitor and research potential mitigation actions to address the intermittent exceedances. |
Violation |
U |
eSMR |
1091398 |
05/06/2021 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.48 SU at M-INTB1. |
Continue to monitor and research potential mitigations to address the intermittent exceedances. |
Violation |
U |
eSMR |
1090695 |
04/14/2021 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.69 SU at M-INTB1. |
Continue to monitor and research potential mitigations to address the intermittent exceedances. |
Violation |
U |
eSMR |
1089334 |
03/02/2021 |
OEV |
pH 1-Hour Average (Mean) limit is 9.0 SU and reported value was 9.1 SU at M-INTB1. |
Continue to monitor and research potential mitigations to address the intermittent exceedances. |
Violation |
U |
eSMR |
1085131 |
12/07/2020 |
OEV |
pH Instantaneous Maximum limit is 9.0 SU and reported value was 9.1 SU at M-INTB. |
Continue to monitor in the following months to determine if the elevated pH is re-occurring or if the elevated pH is a discrete event. |
Violation |
U |
eSMR |
1077555 |
06/02/2020 |
OEV |
pH Instantaneous Maximum limit is 9 SU and reported value was 9.23 SU at M-INTB. |
Manage retention basin depth levels and continue to monitor pH levels. |
Violation |
U |
eSMR |
1076413 |
05/11/2020 |
DMON |
Temperature probe was not connected properly at the time of pH probe calibration and measurement. Temperature default of 25.0 C was used. |
Temperature probe was reconnected. |
Violation |
U |
eSMR |
1076412 |
05/04/2020 |
DMON |
Temperature probe was not connected properly at the time of pH probe calibration and measurement. Temperature default of 25.0 C was used. |
Temperature probe was reconnected. |
Violation |
U |
eSMR |
1075183 |
04/27/2020 |
DMON |
Temperature probe was not connected properly at the time of pH probe calibration and measurement. Temperature default of 25.0 C was used. |
Facility is researching cause of improper connection. |
Violation |
U |
eSMR |
1071427 |
01/13/2020 |
CAT2 |
Copper, Total Recoverable 6-Month Median limit is 0.0074 lb/day and reported value was 0.0083 lb/day at M-INTB. |
Currently in discussions with SARWQCB staff regarding the permit renewal application and the methodology for determining the limit |
Violation |
U |
eSMR |
1069959 |
12/19/2019 |
CAT2 |
Copper, Total Recoverable 6-Month Median limit is 0.0056 lb/day and reported value was 0.0082 lb/day at M-INTB. |
Currently in discussions with SARWQCB staff regarding the permit renewal application and the methodology for determining the limit. |
Violation |
U |
eSMR |
1069960 |
12/03/2019 |
DMON |
Intermittent flow meter and integrator failures occurred between December 3rd and December 18th. Manual logs were kept by the operators during this period. Reported daily flows during this period were estimated based on the manual logs. |
The flow meter/integrator was sent to a third party for repair and placed back in service on December 18th. Reported daily flows from December 18th through the remainder of the month were based on the continuous flow meter readings. |
Violation |
U |
eSMR |
1068234 |
11/05/2019 |
CAT2 |
Copper, Total Recoverable 6-Month Median limit is 0.0038 lb/day and reported value was 0.0067 lb/day at M-INTB. |
Currently in discussions with SARWQCB staff regarding the permit renewal application and the methodology for determining the limit |
Violation |
U |
eSMR |
1067551 |
10/24/2019 |
DMON |
Flow meter power failure occurred at approximately 1:00 am on 10/23/2019. Confirmed valve was in closed position on 10/24/2019, at approximately 9:00 am. However, valve may have been open during this time without monitoring. |
Power was restored to the flow meter on October 25, 2019, at approximately 8:00 pm. |
Violation |
U |
eSMR |
1067550 |
10/23/2019 |
DMON |
Flow meter power failure occurred at approximately 1:00 am on 10/23/2019. Confirmed valve was in closed position on 10/24/2019, at approximately 9:00 am. However, valve may have been open during this time without monitoring. |
Power was restored to the flow meter on October 25, 2019, at approximately 8:00 pm. |
Violation |
U |
eSMR |
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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