| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1128087 |
03/31/2024 |
CAT1 |
Sulfate, Total (as S) Monthly Average (Mean) limit is 250 mg/L and reported value was 367 mg/L at EFF-001. |
Plant personnel will continue to monitor Sulfate weekly until the SVWQCP is back in compliance. |
Violation |
U |
eSMR |
| 1128088 |
03/31/2024 |
CAT1 |
Total Dissolved Solids (TDS) Monthly Average (Mean) limit is 850 mg/L and reported value was 960 mg/L at EFF-001. |
Plant personnel will continue to monitor TDS weekly until the SVWQCP is back in compliance. |
Violation |
U |
eSMR |
| 1127308 |
02/29/2024 |
CAT1 |
Sulfate, Total (as SO4) Monthly Average (Mean) limit is 250 mg/L and reported value was 412 mg/L at EFF-001. |
Staff will monitor the effluent Sulfate weekly until the SVWQCP is back in compliance |
Violation |
U |
eSMR |
| 1127309 |
02/29/2024 |
CAT1 |
Total Dissolved Solids (TDS) Monthly Average (Mean) limit is 0850 mg/L and reported value was 1084 mg/L at EFF-001. |
Staff will monitor the effluent TDS weekly until the SVWQCP is back in compliance |
Violation |
U |
eSMR |
| 1123167 |
10/03/2023 |
CAT1 |
Ammonia, Total (as N) Maximum Daily (MDEL) limit is 152 lb/day and reported value was 189 lb/day at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting the DO. Also turned down the dosage of aqueous Ammonia for disinfection. BNR tanks were also cleaned. |
Violation |
U |
eSMR |
| 1123166 |
10/03/2023 |
CAT1 |
Ammonia, Total (as N) Maximum Daily (MDEL) limit is 3.3 mg/L and reported value was 3.6 mg/L at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting the DO. Also turned down the dosage of aqueous Ammonia for disinfection. BNR tanks were also cleaned. |
Violation |
U |
eSMR |
| 1118419 |
04/30/2023 |
DMON |
Laboratory staff had sent weekly samples (4/11, 4/18, & 4/25) to be analyzed for Selenium to BSK Associates, but unfortunately all the samples were lost in transit. |
Staff will continue to monitor the effluent Selenium weekly until the SVWQCP is back in compliance. Staff will also save extra preserved samples in case this issue occurs again. |
Violation |
U |
eSMR |
| 1118418 |
04/30/2023 |
CAT2 |
Selenium, Total Monthly Average limit is 4.5 ug/L and reported value was 4.8 ug/L at EFF-001. |
Staff will continue to monitor the effluent Selenium weekly until the SVWQCP is back in compliance. |
Violation |
U |
eSMR |
| 1116992 |
03/31/2023 |
CAT1 |
Sulfate, Total (as SO4) Monthly Average (Mean) limit is 26060.0 lb/day and reported value was 28846.0 lb/day at EFF-001. |
Staff will monitor the effluent Sulfate weekly until the SVWQCP is back in compliance |
Violation |
B |
eSMR |
| 1116993 |
03/31/2023 |
CAT2 |
Selenium, Total Monthly Average (Mean) limit is 4.5 ug/L and reported value was 4.6 ug/L at EFF-001. |
Staff will monitor the effluent Selenium weekly until the SVWQCP is back in compliance. |
Violation |
B |
eSMR |
| 1116611 |
02/04/2023 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 2.6 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates and DO set points. We also looked into the possible addition of supplements to aid in controlling these filaments. |
Violation |
U |
eSMR |
| 1116609 |
02/03/2023 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 3.2 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates and DO set points. We also looked into the possible addition of supplements to aid in controlling these filaments. |
Violation |
U |
eSMR |
| 1116610 |
02/02/2023 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 3.4 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates and DO set points. We also looked into the possible addition of supplements to aid in controlling these filaments. |
Violation |
U |
eSMR |
| 1116608 |
02/01/2023 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 3.2 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates and DO set points. We also looked into the possible addition of supplements to aid in controlling these filaments. |
Violation |
U |
eSMR |
| 1122961 |
01/30/2023 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 2.8 NTU at EFF-001. |
|
Violation |
B |
Report |
| 1114494 |
12/31/2022 |
CAT1 |
Ammonia, Total (as N) Monthly Average limit is 2.4 mg/L and reported value was 3.2 mg/L at EFF-001. |
Plant personnel turned off the Enviromix system and switched back to the old mechanical mixing system, which is had a positive effect on treatment. The SVWQCP also added supplemental nitrifying bacteria to the BNR system. |
Violation |
B |
eSMR |
| 1114495 |
12/31/2022 |
CTOX |
Chronic Toxicity (Species 3) Monthly Median limit is 0 Pass/Fail (Pass = 0, Fail = 1) and reported value was 1 Pass/Fail (Pass = 0, Fail = 1) at EFF-001. |
Plant personnel began to remedy the situation by adjusting WAS/RAS rates, DO set points, and adding supplemental nitrifying bacteria to the BNR system. Plant personnel also turned off the Enviromix system and switched back to the mechanical mixing system in the BNR anoxic zones. Treatment has shown substantial improvement and the ammonia is currently < 2 mg/L. |
Violation |
U |
eSMR |
| 1114493 |
12/15/2022 |
CAT1 |
Ammonia, Total (as N) Daily Maximum limit is 164 lb/day and reported value was 170 lb/day at EFF-001. |
Plant personnel turned off the Enviromix system and switched back to the old mechanical mixing system, which is had a positive effect on treatment. The SVWQCP also added supplemental nitrifying bacteria to the BNR system. |
Violation |
B |
eSMR |
| 1114497 |
12/06/2022 |
CAT1 |
Ammonia, Total (as N) Daily Maximum limit is 169 lb/day and reported value was 1366 lb/day at EFF-001. |
Plant personnel turned off the Enviromix system and switched back to the old mechanical mixing system, which is had a positive effect on treatment. The SVWQCP also added supplemental nitrifying bacteria to the BNR system. |
Violation |
B |
eSMR |
| 1114496 |
12/06/2022 |
CAT1 |
Ammonia, Total (as N) Daily Maximum limit is 3.3 mg/L and reported value was 23.4 mg/L at EFF-001. |
Plant personnel turned off the Enviromix system and switched back to the old mechanical mixing system, which is had a positive effect on treatment. The SVWQCP also added supplemental nitrifying bacteria to the BNR system. |
Violation |
B |
eSMR |
| 1122949 |
12/05/2022 |
CTOX |
Chronic Toxicity (Species 3) Maximum Daily (MDEL) limit is 49.99 % effect and reported value was 100 % effect at EFF-001. |
|
Violation |
B |
Report |
| 1113075 |
11/30/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 2.4 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
U |
eSMR |
| 1113061 |
11/30/2022 |
CAT1 |
Ammonia, Total (as N) Daily Maximum limit is 128 lb/day and reported value was 1856 lb/day at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
B |
eSMR |
| 1113060 |
11/30/2022 |
CAT1 |
Ammonia, Total (as N) Daily Maximum limit is 3.3 mg/L and reported value was 42 mg/L at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
B |
eSMR |
| 1113076 |
11/30/2022 |
CAT1 |
Ammonia, Total (as N) Monthly Average (Mean) limit is 2.4 mg/L and reported value was 39 mg/L at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
B |
eSMR |
| 1113053 |
11/30/2022 |
CTOX |
Chronic Toxicity (Species 3) Monthly Median limit is 0 Pass/Fail (Pass = 0, Fail = 1) and reported value was 1 Pass/Fail (Pass = 0, Fail = 1) at EFF-001. |
The high ammonia (>10 mg/L) in the effluent is the likely cause of the Chronic Toxicity failures. Accelerated monitoring was scheduled for: December 27, 2022, January 9, 2023, January 23, 2023, and February 6, 2023.
Plant personnel began to remedy the situation by adjusting WAS/RAS rates, DO set points, and adding supplemental nitrifying bacteria to the BNR system. Plant personnel also turned off the Enviromix system and switched back to the mechanical mixing system in the BNR anoxic zones. Treatment has shown substantial improvement.
|
Violation |
U |
eSMR |
| 1113074 |
11/29/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 2.4 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
U |
eSMR |
| 1113073 |
11/28/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 2.4 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
U |
eSMR |
| 1113072 |
11/27/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 2.2 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
U |
eSMR |
| 1113070 |
11/26/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 2.5 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
U |
eSMR |
| 1113071 |
11/25/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 2.6 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
B |
eSMR |
| 1113079 |
11/24/2022 |
OEV |
Total Coliform Other limit is 23 MPN/100 mL and reported value was 130 MPN/100 mL at EFF-001. |
Plant personnel also began cleaning the chlorine contact chambers on November 21, 2022, which is the likely cause of the Total Coliform exceedances. |
Violation |
U |
eSMR |
| 1113055 |
11/24/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 2.7 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
U |
eSMR |
| 1113059 |
11/23/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 2.9 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
U |
eSMR |
| 1113078 |
11/22/2022 |
OEV |
Total Coliform Other limit is 23 MPN/100 mL and reported value was 130 MPN/100 mL at EFF-001. |
Plant personnel also began cleaning the chlorine contact chambers on November 21, 2022, which is the likely cause of the Total Coliform exceedances. |
Violation |
U |
eSMR |
| 1113058 |
11/22/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 2.4 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
U |
eSMR |
| 1122947 |
11/22/2022 |
CAT1 |
Ammonia, Total (as N) Maximum Daily (MDEL) limit is 167 lb/day and reported value was 2348 lb/day at EFF-001. |
|
Violation |
B |
Report |
| 1122946 |
11/22/2022 |
CAT1 |
Ammonia, Total (as N) Maximum Daily (MDEL) limit is 3.3 mg/L and reported value was 40.8 mg/L at EFF-001. |
|
Violation |
B |
Report |
| 1113064 |
11/21/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 2.1 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
U |
eSMR |
| 1113069 |
11/17/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 2.1 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
U |
eSMR |
| 1113067 |
11/17/2022 |
CAT1 |
Ammonia, Total (as N) Daily Maximum limit is 160.0 lb/day and reported value was 2345.0 lb/day at EFF-001. |
Plant personnel are attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
B |
eSMR |
| 1113066 |
11/17/2022 |
CAT1 |
Ammonia, Total (as N) Daily Maximum limit is 3.3 mg/L and reported value was 42.6 mg/L at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
B |
eSMR |
| 1113065 |
11/16/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 2.9 NTU. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
U |
eSMR |
| 1122948 |
11/15/2022 |
CTOX |
Chronic Toxicity (Species 3) Maximum Daily (MDEL) limit is 49.99 % effect and reported value was 100.0 % effect at EFF-001. |
|
Violation |
B |
Report |
| 1113063 |
11/11/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 2.3 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, and DO set points. The SVWQCP also continued to add supplemental nitrifying bacteria to the BNR system. |
Violation |
U |
eSMR |
| 1113068 |
11/10/2022 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 920 MPN/100 mL at EFF-001. |
After diverting flow to the lagoon on November 9, 2022, the SVWQCP began to discharge back into the Arroyo Simi on November 10, 2022 at approximately 12:00 pm, staff sampled for coliform testing shortly after which was much too soon. In the future staff will not sample so soon after returning flow. |
Violation |
U |
eSMR |
| 1113054 |
11/08/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 3.6 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates and DO set points. The SVWQCP also started adding supplemental nitrifying bacteria to the BNR system. |
Violation |
U |
eSMR |
| 1113057 |
11/08/2022 |
CAT1 |
Ammonia, Total (as N) Daily Maximum limit is 167.0 lb/day and reported value was 1761.0 lb/day at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates and DO set points. The SVWQCP also started adding supplemental nitrifying bacteria to the BNR system. |
Violation |
B |
eSMR |
| 1113056 |
11/08/2022 |
CAT1 |
Ammonia, Total (as N) Daily Maximum limit is 3.3 mg/L and reported value was 30.6 mg/L at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates and DO set points. The SVWQCP also started adding supplemental nitrifying bacteria to the BNR system. |
Violation |
B |
eSMR |
| 1113062 |
11/07/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 3.7 NTU at EFF-001. |
Plant personnel attempted remedy the situation by adjusting process controls such as WAS/RAS rates and DO set points. The SVWQCP also started adding supplemental nitrifying bacteria to the BNR system. |
Violation |
U |
eSMR |
| 1113077 |
11/06/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 3.1 NTU at EFF-001. |
Plant personnel attempted remedy the situation by adjusting process controls such as WAS/RAS rates and DO set points. The SVWQCP also started adding supplemental nitrifying bacteria to the BNR system. |
Violation |
U |
eSMR |
| 1112144 |
10/31/2022 |
CAT1 |
Ammonia, Total (as N) Daily Maximum limit is 160 lb/day and reported value was 1376 lb/day at EFF-001. |
The compounded system power failures likely killed off most of our nitrifying bacteria.
The SVWQCP has hired consultants in bio-augmentation for microscopic analysis of the plant¿s mixed liquor, and added additional nitrifying bacteria to BNR system.
|
Violation |
B |
eSMR |
| 1112143 |
10/31/2022 |
CAT1 |
Ammonia, Total (as N) Daily Maximum limit is 3.3 mg/L and reported value was 25 mg/L at EFF-001. |
The compounded system power failures likely killed off most of our nitrifying bacteria.
The SVWQCP has hired consultants in bio-augmentation for microscopic analysis of the plant¿s mixed liquor, and added additional nitrifying bacteria to BNR system.
|
Violation |
B |
eSMR |
| 1112140 |
10/31/2022 |
CAT1 |
Ammonia, Total (as N) Monthly Average (Mean) limit is 2.4 mg/L and reported value was 22 mg/L at EFF-001. |
The compounded system power failures likely killed off most of our nitrifying bacteria.
The SVWQCP has hired consultants in bio-augmentation for microscopic analysis of the plant's mixed liquor, and added additional nitrifying bacteria to BNR system.
|
Violation |
B |
eSMR |
| 1122942 |
10/31/2022 |
CTOX |
Chronic Toxicity (Species 3) Monthly Median limit is 0.0 Pass/Fail (Pass = 0, Fail = 1) and reported value was 1.0 Pass/Fail (Pass = 0, Fail = 1) at EFF-001. |
|
Violation |
B |
Report |
| 1122941 |
10/24/2022 |
CTOX |
Chronic Toxicity (Species 3) Maximum Daily (MDEL) limit is 49.99 % effect and reported value was 100 % effect at EFF-001. |
|
Violation |
B |
Report |
| 1112134 |
10/11/2022 |
DMON |
The October Effluent sample was received in good condition at the BSK San Bernardino satellite laboratory on 10/11/2022 and logged in by BSK-RAL for Cyanide testing. The sample was then shipped overnight to the BSK Fresno main laboratory. However, a Facility Code in the transit chain-of-custody was inadvertently left out for the Cyanide testing, thus failing to designate the Cyanide test to be performed by BSK-FAL, instead of BSK-RAL. Consequently, even though the sample arrived at BSK-FAL on 10/12/2022, and the Laboratory Information System (LIMS) had a Cyanide test logged in for the sample, the test did not show up amongst the worklists to be performed by the Wet Chemistry department at BSK-FAL. By the time this login error was discovered, the sample container was already disposed and the sample had already passed the 14 days holding time for Cyanide testing. When BSK notified us, it was too late to resample. There were no reported results for Cyanide in the month of October. |
BSK apologized for missing the Cyanide testing for the 10/11/2022 Effluent sample and that it was discovered too late for the City of Simi Valley to resample to meet our monthly monitoring requirements. BSK clearly stated that the missing Cyanide result was due to the laboratory's login error, and not the fault of City of Simi Valley. BSK has created a new LIMS query for any items that are missing Facility Code in the transit COC and will be re-training all the staff with the proper transit COC procedures. They believe the corrective actions will adequately address this deficiency and prevent the error from happening again. The Simi Valley Water Quality Control Plant Laboratory staff were also instructed to check that all samples have been received by the contract lab and are in process before the end of each month. |
Violation |
U |
eSMR |
| 1112142 |
10/11/2022 |
CAT1 |
Ammonia, Total (as N) Daily Maximum limit is 157.0 lb/day and reported value was 1030.0 lb/day at EFF-001. |
The compounded system power failures likely killed off most of our nitrifying bacteria.
The SVWQCP has hired consultants in bio-augmentation for microscopic analysis of the plant¿s mixed liquor, and added additional nitrifying bacteria to BNR system.
|
Violation |
B |
eSMR |
| 1112145 |
10/11/2022 |
CAT1 |
Ammonia, Total (as N) Daily Maximum limit is 3.3 mg/L and reported value was 19 mg/L at EFF-001. |
The compounded system power failures likely killed off most of our nitrifying bacteria.
The SVWQCP has hired consultants in bio-augmentation for microscopic analysis of the plant¿s mixed liquor, and added additional nitrifying bacteria to BNR system.
|
Violation |
B |
eSMR |
| 1112146 |
10/08/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 3.5 NTU at EFF-001. |
Plant personnel was able to repair the leak in the water line and attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remained on mechanical mixing. |
Violation |
U |
eSMR |
| 1112139 |
10/08/2022 |
OEV |
Turbidity Other NTU at EFF-001. |
Plant personnel was able to repair the leak in the water line and attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remained on mechanical mixing. |
Violation |
U |
eSMR |
| 1112138 |
10/07/2022 |
OEV |
Turbidity Other NTU at EFF-001. |
Plant personnel was able to repair the leak in the water line and attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remained on mechanical mixing. |
Violation |
U |
eSMR |
| 1112141 |
10/04/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 3.2 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remained on mechanical mixing. Plant personnel also performed maintenance on the BNR diffusers. The SVWQCP also hired a consultant (Bioalchemy) to help improve treatment by adding more nitrifying bacteria. |
Violation |
U |
eSMR |
| 1112137 |
10/03/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 3.5 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remained on mechanical mixing. Plant personnel also performed maintenance on the BNR diffusers. The SVWQCP also hired a consultant (Bioalchemy) to help improve treatment by adding more nitrifying bacteria. |
Violation |
U |
eSMR |
| 1112136 |
10/02/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 4.2 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remained on mechanical mixing. Plant personnel also performed maintenance on the BNR diffusers. The SVWQCP also hired a consultant (Bioalchemy) to help improve treatment by adding more nitrifying bacteria. |
Violation |
U |
eSMR |
| 1112135 |
10/01/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 2.8 NTU at EFF-001. |
Plant personnel attempted to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remained on mechanical mixing. Plant personnel also performed maintenance on the BNR diffusers. The SVWQCP also hired a consultant (Bioalchemy) to help improve treatment by adding more nitrifying bacteria. |
Violation |
U |
eSMR |
| 1111188 |
09/30/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 2.8 NTU at EFF-001. |
Plant personnel are attempting to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remain on mechanical mixing. Plant personnel is also continuing to perform maintenance on the BNR diffusers. The SVWQCP has also hired a consultant (Bioalchemy) to help improve treatment by adding more nitrifying bacteria. |
Violation |
U |
eSMR |
| 1111186 |
09/29/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 2.7 NTU at EFF-001. |
Plant personnel are attempting to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remain on mechanical mixing. Plant personnel is also continuing to perform maintenance on the BNR diffusers. The SVWQCP has also hired a consultant (Bioalchemy) to help improve treatment by adding more nitrifying bacteria. |
Violation |
U |
eSMR |
| 1111180 |
09/28/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 2.3 NTU at EFF-001. |
Plant personnel are attempting to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remain on mechanical mixing. Plant personnel is also continuing to perform maintenance on the BNR diffusers. The SVWQCP has also hired a consultant (Bioalchemy) to help improve treatment by adding more nitrifying bacteria. |
Violation |
U |
eSMR |
| 1111189 |
09/27/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 2.4 NTU at EFF-001. |
Plant personnel are attempting to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remain on mechanical mixing. Plant personnel is also continuing to perform maintenance on the BNR diffusers. The SVWQCP has also hired a consultant (Bioalchemy) to help improve treatment by adding more nitrifying bacteria. |
Violation |
U |
eSMR |
| 1111191 |
09/26/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 2.7 NTU at EFF-001. |
Plant personnel are attempting to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remain on mechanical mixing. Plant personnel is also continuing to perform maintenance on the BNR diffusers. The SVWQCP has also hired a consultant (Bioalchemy) to help improve treatment by adding more nitrifying bacteria. |
Violation |
U |
eSMR |
| 1111184 |
09/23/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 2.5 NTU at EFF-001. |
Plant personnel are attempting to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remain on mechanical mixing. Plant personnel is also continuing to perform maintenance on the BNR diffusers. The SVWQCP has also hired a consultant (Bioalchemy) to help improve treatment by adding more nitrifying bacteria. |
Violation |
U |
eSMR |
| 1111181 |
09/22/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 2.4 NTU at EFF-001. |
Plant personnel are attempting to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remain on mechanical mixing. Plant personnel is also continuing to perform maintenance on the BNR diffusers. The SVWQCP has also hired a consultant (Bioalchemy) to help improve treatment by adding more nitrifying bacteria. |
Violation |
U |
eSMR |
| 1111187 |
09/21/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 3.2 NTU at EFF-001. |
Plant personnel are attempting to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remain on mechanical mixing. Plant personnel has also begun to perform maintenance on the BNR diffusers. The SVWQCP has also hired a consultant (Bioalchemy) to help improve treatment. |
Violation |
U |
eSMR |
| 1111192 |
09/20/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 3.2 NTU at EFF-001. |
Plant personnel are attempting to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remain on mechanical mixing. Plant personnel has also begun to perform maintenance on the BNR diffusers. The SVWQCP has also hired a consultant (Bioalchemy) to help improve treatment. |
Violation |
U |
eSMR |
| 1111179 |
09/19/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 3.3 NTU at EFF-001. |
Plant personnel are attempting to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remain on mechanical mixing. Plant personnel has also begun to perform maintenance on the BNR diffusers. The SVWQCP has also hired a consultant (Bioalchemy) to help improve treatment. |
Violation |
U |
eSMR |
| 1111178 |
09/18/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 3.4 NTU at EFF-001. |
Plant personnel are attempting to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remain on mechanical mixing. Plant personnel has also begun to perform maintenance on the BNR diffusers. The SVWQCP has also hired a consultant (Bioalchemy) to help improve treatment. |
Violation |
U |
eSMR |
| 1111185 |
09/17/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 2.4 NTU at EFF-001. |
Plant personnel are attempting to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remain on mechanical mixing. Plant personnel has also begun to perform maintenance on the BNR diffusers. The SVWQCP has also hired a consultant (Bioalchemy) to help improve treatment. |
Violation |
U |
eSMR |
| 1111183 |
09/16/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 2.5 NTU at EFF-001. |
Plant personnel are attempting to remedy the situation by adjusting process controls such as WAS/RAS rates, DO set points, and remain on mechanical mixing. Plant personnel has also begun to perform maintenance on the BNR diffusers. The SVWQCP has also hired a consultant (Bioalchemy) to help improve treatment. |
Violation |
U |
eSMR |
| 1111177 |
09/14/2022 |
OEV |
Turbidity Other NTU at EFF-001. |
Plant personnel have attempted to remedy the situation by adjusting process controls such as RAS/WAS rates, replacing RAS pump #3, programming alarms to functioning properly, and remain on mechanical mixing until the Enviromix system can be proven to be reliable. |
Violation |
U |
eSMR |
| 1111182 |
09/12/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 2.6 NTU at EFF-001. |
Plant personnel have attempted to remedy the situation by adjusting process controls such as RAS/WAS rates and replacing RAS pump #3. |
Violation |
U |
eSMR |
| 1111190 |
09/11/2022 |
OEV |
Turbidity Daily Average (Mean) limit is 2.0 NTU and reported value was 2.3 NTU at EFF-001. |
Plant personnel have attempted to remedy the situation by adjusting process controls such as RAS/WAS rates and replacing RAS pump #3. |
Violation |
U |
eSMR |
| 1089824 |
02/09/2021 |
CAT1 |
Ammonia, Total (as N) Daily Maximum limit is 172.0 lb/day and reported value was 189.0 lb/day at EFF-001. |
The suspected cause of the exceedance is due to the ongoing construction at the treatment facility. Some of the construction requires operations to remove one of our seven aeration basins from service resulting in less than full treatment capacity. To help remedy the situation, we have been adjusting process controls such as RAS/WAS rates and addition of polymers to the process to help with settling. |
Violation |
B |
eSMR |
| 1087441 |
12/31/2020 |
CTOX |
Chronic Toxicity Monthly Median limit is 0 Pass/Fail (Pass = 0, Fail = 1) and reported value was 1 Pass/Fail (Pass = 0, Fail = 1) at EFF-001. |
A TIE preliminary finding of the pH treatment showed a successful removal of the toxicity in the sample. The next step involves analyzing the polymer at various concentrations for toxicity. The plant also continues to limit waste hauler dumping which has resulted in the improvement of toxicity in recent tests. During this process, the SVWQCP continues TRE/TIE activities while continuing the monthly compliance monitoring. A final TRE/TIE report will be sent to the RWQCB upon completion of the evaluation for review. |
Violation |
B |
eSMR |
| 1118247 |
12/02/2020 |
CTOX |
Chronic Toxicity Maximum Daily (MDEL) limit is 0.0 Pass/Fail (Pass = 0, Fail = 1) and reported value was 1.0 Pass/Fail (Pass = 0, Fail = 1) at EFF-001. |
|
Violation |
B |
Report |
| 1083848 |
10/07/2020 |
CTOX |
Chronic Toxicity Monthly Median limit is 0 Pass/Fail (Pass = 0, Fail = 1) and reported value was 1 Pass/Fail (Pass = 0, Fail = 1) at EFF-001. |
The accelerated chronic toxicity began on July 9, 2020 and yielded a FAIL result. Based on this result and as stated in the NPDES permit, the SVWQCP implemented a Toxicity Reduction Evaluation and Toxicity Identification Evaluation (TRE/TIE). A preliminary finding of the pH treatment showed a successful removal of the toxicity in the sample. The next step will involve sending out the post and pretreated samples for chemical analysis to find any constituents of concern that were removed. If similar effect is observed in subsequent samples, we will want to repeat the treatment and see if the same result occurs. |
Violation |
B |
eSMR |
| 1082463 |
09/02/2020 |
CTOX |
Chronic Toxicity Monthly Median limit is 0 Pass/Fail (Pass = 0, Fail = 1) and reported value was 1 Pass/Fail (Pass = 0, Fail = 1) at EFF-001. |
The accelerated chronic toxicity began on July 9, 2020 and yielded a FAIL result. Based on this result and as stated in the NPDES permit, the SVWQCP implemented a Toxicity Reduction Evaluation and Toxicity Identification Evaluation (TRE/TIE). A preliminary finding of the pH treatment showed a successful removal of the toxicity in the sample. The next step will involve sending out the post and pretreated samples for chemical analysis to find any constituents of concern that were removed. If similar effect is observed in subsequent samples, we will want to repeat the treatment and see if the same result occurs. |
Violation |
B |
eSMR |
| 1081221 |
08/05/2020 |
CTOX |
Chronic Toxicity Monthly Median limit is 0 Pass/Fail (Pass = 0, Fail = 1) and reported value was 1 Pass/Fail (Pass = 0, Fail = 1) at EFF-001. |
The accelerated chronic toxicity began on July 9, 2020 and yielded a FAIL result. Based on this result and as stated in the NPDES permit, the SVWQCP implemented a Toxicity Reduction Evaluation and Toxicity Identification Evaluation (TRE/TIE). A preliminary finding of the pH treatment showed a successful removal of the toxicity in the sample. The next step will involve sending out the post and pretreated samples for chemical analysis to find any constituents of concern that were removed. If similar effect is observed in subsequent samples, we will want to repeat the treatment and see if the same result occurs. |
Violation |
B |
eSMR |
| 1080206 |
07/08/2020 |
CTOX |
Chronic Toxicity Monthly Median limit is 0 Pass/Fail (Pass = 0, Fail = 1) and reported value was 1 Pass/Fail (Pass = 0, Fail = 1) at EFF-001. |
The accelerated chronic toxicity began on July 9, 2020 and yielded a FAIL result. Based on this result and as stated in the NPDES permit, the SVWQCP implemented a Toxicity Reduction Evaluation and Toxicity Identification Evaluation (TRE/TIE). A preliminary finding of the pH treatment showed a successful removal of the toxicity in the sample. The next step will involve sending out the post and pretreated samples for chemical analysis to find any constituents of concern that were removed. If similar effect is observed in subsequent samples, we will want to repeat the treatment and see if the same result occurs. |
Violation |
B |
eSMR |
| 1079053 |
06/03/2020 |
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 EFF-001. |
The accelerated chronic toxicity began on July 9, 2020 and yielded a FAIL result. Based on this result and as stated in the NPDES permit, the SVWQCP implemented a Toxicity Reduction Evaluation and Toxicity Identification Evaluation (TRE/TIE). A preliminary finding of the pH treatment showed a successful removal of the toxicity in the sample. The next step will involve sending out the post and pretreated samples for chemical analysis to find any constituents of concern that were removed. If similar effect is observed in subsequent samples, we will want to repeat the treatment and see if the same result occurs. |
Violation |
B |
eSMR |
| 1076783 |
04/30/2020 |
CAT1 |
Nitrate, Total (as N) Monthly Average (Mean) limit is 9.0 mg/L and reported value was 9.3 mg/L at EFF-001. |
This was caused by two factors: internal recycle of high strength ammonia waste, and the scheduled maintenance of the aeration diffusers in one the BNR basins.
Corrective action taken: the recycle of the high strength waste have been modified to lessen the impact on the process; and the scheduled maintenance of the diffusers will only be performed when it will not have an impact on the monthly average of Nitrate (as N). |
Violation |
B |
eSMR |
| 1076784 |
04/30/2020 |
CAT1 |
Nitrite Plus Nitrate (as N) Monthly Average (Mean) limit is 9.0 mg/L and reported value was 9.6 mg/L at EFF-001. |
This was caused by two factors: internal recycle of high strength ammonia waste, and the scheduled maintenance of the aeration diffusers in one the BNR basins. Corrective action taken: the recycle of the high strength waste have been modified to lessen the impact on the process; and the scheduled maintenance of the diffusers will only be performed when it will not have an impact on the monthly average of Nitrate (as N). |
Violation |
B |
eSMR |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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