Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
1142254 |
03/24/2025 |
DMON |
On April 2nd, the City was notified by Eurofins lab that Calscience experienced BOD LCS failure from
their batch due to algal growth and debris in the seed line and syringe pump. This failure affected the
March 24th WRF No. 1 weekly influent BOD sample. |
Following the investigation, the lab replaced the seed line, syringe drive, and sensor caps. Components are also to be inspected daily. A corrective action report was requested and is attached to this report. |
Violation |
U |
eSMR |
1139469 |
12/03/2024 |
CAT2 |
Dieldrin Daily Maximum limit is 0.00028 ug/L and reported value was 0.013 ug/L at M-001. |
Staff did not find abnormal activity that may have contributed to this detection. The City will continue to monitor dieldrin monthly at the influent and effluent of WRF No. 1 and will continue to review and update the PMP. |
Violation |
U |
eSMR |
1139468 |
12/03/2024 |
CAT2 |
Dieldrin Monthly Average limit is 0.00014 ug/L and reported value was 0.0065 ug/L at M-001. |
Staff did not find abnormal activity that may have contributed to this detection. The City will continue to monitor dieldrin monthly at the influent and effluent of WRF No. 1 and will continue to review and update the PMP. |
Violation |
U |
eSMR |
1138194 |
11/05/2024 |
CAT2 |
Cyanide, Free Available Monthly Average limit is 4.3 ug/L and reported value was 7.10 ug/L at M-001. |
The City will work with the lab to review results collected this year under
both methods 4500CN and OIA 1677 and to determine where cyanide is being generated. |
Violation |
U |
eSMR |
1128064 |
04/30/2024 |
CAT2 |
Cyanide, Free Available Monthly Average (Mean) limit is 4.3 ug/L and reported value was 5.5 ug/L at M-001. |
The City is looking into potential sources of contamination and has increased monitoring for amenable cyanide. |
Violation |
U |
eSMR |
1112956 |
12/06/2022 |
CAT2 |
Dieldrin Daily Maximum limit is 0.00028 ug/L and reported value was 0.0037 ug/L at M-001. |
The City is looking into possible causes of the exceedance and will continue to monitor results monthly. |
Violation |
U |
eSMR |
1112955 |
12/06/2022 |
CAT2 |
Dieldrin Monthly Average limit is 0.00014 ug/L and reported value was 0.0037 ug/L at M-001. |
The City is looking into possible causes of the exceedance and will continue to monitor results monthly. |
Violation |
U |
eSMR |
1112958 |
12/06/2022 |
CAT2 |
Heptachlor Daily Maximum limit is 0.00042 ug/L and reported value was 0.03 ug/L at M-001. |
Heptachlor was added to the PMP in January 2023. The City is looking into possible
causes of the exceedance and will continue to monitor results monthly. |
Violation |
U |
eSMR |
1112957 |
12/06/2022 |
CAT2 |
Heptachlor Monthly Average limit is 0.00021 ug/L and reported value was 0.03 ug/L at M-001. |
Heptachlor was added to the PMP in January 2023. The City is looking into possible
causes of the exceedance and will continue to monitor results monthly. |
Violation |
U |
eSMR |
1111629 |
11/08/2022 |
CAT2 |
4,4-DDT Daily Maximum limit is 0.0012 ug/L and reported value was 0.0021 ug/L at M-001. |
The City is looking into possible sources of pollution. |
Violation |
U |
eSMR |
1111628 |
11/08/2022 |
CAT2 |
4,4-DDT Monthly Average (Mean) limit is 0.00059 ug/L and reported value was 0.0021 ug/L at M-001. |
The City is looking into possible sources of pollution. |
Violation |
U |
eSMR |
1109716 |
09/06/2022 |
CAT2 |
Cyanide, Free Available Daily Maximum limit is 8.5 ug/L and reported value was 18 ug/L at M-001. |
The City is looking into possible sources of pollution and will continue to monitor monthly. |
Violation |
U |
eSMR |
1109714 |
09/06/2022 |
CAT2 |
Cyanide, Free Available Monthly Average limit is 4.3 ug/L and reported value was 18 ug/L at M-001. |
The City is looking into possible sources of pollution and will continue to monitor monthly. |
Violation |
U |
eSMR |
1108842 |
08/13/2022 |
DMON |
8/13/22 TSS sample lost by lab. No data available. |
The City has requested a Corrective Action Report from the lab for this sample. |
Violation |
U |
eSMR |
1108836 |
08/02/2022 |
CAT2 |
Bis (2-Ethylhexyl) Phthalate Daily Maximum limit is 11.8 ug/L and reported value was 61 ug/L at M-001. |
The City is investigating potential sources of pollution. |
Violation |
U |
eSMR |
1108839 |
08/02/2022 |
CAT2 |
Bis (2-Ethylhexyl) Phthalate Monthly Average limit is 5.9 ug/L and reported value was 61 ug/L at M-001. |
The City is investigating potential sources of pollution. |
Violation |
U |
eSMR |
1106611 |
06/29/2022 |
CAT2 |
Bis (2-Ethylhexyl) Phthalate Monthly Average limit is 5.9 ug/L and reported value was 9.1 ug/L at M-001. |
The City is investigating potential sources of pollution. |
Violation |
B |
eSMR |
1112163 |
05/16/2022 |
CAT2 |
Bis (2-Ethylhexyl) Phthalate Daily Maximum limit is 11.8 ug/L and reported value was 15 ug/L at M-001. |
The City has investigated potential sources of pollution as soon as it became aware of the exceedance, despite lab reporting delays. The City had reached out to the pretreatment team and replaced all sampling tubing and believes the issue has been resolved based on more recent lab results. |
Violation |
U |
eSMR |
1112164 |
05/16/2022 |
CAT2 |
Bis (2-Ethylhexyl) Phthalate Monthly Average limit is 5.9 ug/L and reported value was 15 ug/L at M-001. |
The City has investigated potential sources of pollution as soon as it became aware of the exceedance, despite lab reporting delays. The City had reached out to the pretreatment team and replaced all sampling tubing and believes the issue has been resolved based on more recent lab results. |
Violation |
U |
eSMR |
1101369 |
01/12/2022 |
OEV |
Turbidity Other limit is 5 NTU and reported value was 9.99 NTU at M-001. |
Operations staff turned EQs into a clarifier to capture most of the solids from going out in the effluent. Ran polymer to keep solids from washing out of the clarifiers and alum as required per our permit. |
Violation |
U |
eSMR |
1101349 |
01/11/2022 |
OEV |
Turbidity 24-hour Average limit is 2 NTU and reported value was 4.74 NTU at M-001. |
Operations staff turned EQs into a clarifier to capture most of the solids from going out in the effluent. Ran polymer to keep solids from washing out of the clarifiers and alum as required per our permit. |
Violation |
U |
eSMR |
1101346 |
01/11/2022 |
OEV |
Turbidity Other limit is 10 NTU and reported value was 11 NTU at M-001. |
Operations staff turned EQs into a clarifier to capture most of the solids from going out in the effluent. Ran polymer to keep solids from washing out of the clarifiers and alum as required per our permit. |
Violation |
U |
eSMR |
1101372 |
01/11/2022 |
OEV |
Turbidity Other limit is 5 NTU and reported value was 9.99 NTU at M-001. |
Operations staff turned EQs into a clarifier to capture most of the solids from going out in the effluent. Ran polymer to keep solids from washing out of the clarifiers and alum as required per our permit. |
Violation |
U |
eSMR |
1101354 |
01/10/2022 |
OEV |
Turbidity 24-hour Average limit is 2 NTU and reported value was 3.35 NTU at M-001. |
Operations staff turned EQs into a clarifier to capture most of the solids from going out in the effluent. Ran polymer to keep solids from washing out of the clarifiers and alum as required per our permit. |
Violation |
U |
eSMR |
1101341 |
01/10/2022 |
OEV |
Turbidity Other limit is 10 NTU and reported value was 11 NTU at M-001. |
Operations staff turned EQs into a clarifier to capture most of the solids from going out in the effluent. Ran polymer to keep solids from washing out of the clarifiers and alum as required per our permit. |
Violation |
U |
eSMR |
1101348 |
01/10/2022 |
OEV |
Turbidity Other limit is 5 NTU and reported value was 9.99 NTU at M-001. |
Operations staff turned EQs into a clarifier to capture most of the solids from going out in the effluent. Ran polymer to keep solids from washing out of the clarifiers and alum as required per our permit. |
Violation |
U |
eSMR |
1101374 |
01/09/2022 |
OEV |
Turbidity 24-hour Average limit is 2 NTU and reported value was 3.73 NTU at M-001. |
Operations staff turned EQs into a clarifier to capture most of the solids from going out in the effluent. Ran polymer to keep solids from washing out of the clarifiers and alum as required per our permit. |
Violation |
U |
eSMR |
1101377 |
01/09/2022 |
OEV |
Turbidity Other limit is 10 NTU and reported value was 11 NTU at M-001. |
Operations staff turned EQs into a clarifier to capture most of the solids from going out in the effluent. Ran polymer to keep solids from washing out of the clarifiers and alum as required per our permit. |
Violation |
U |
eSMR |
1101368 |
01/09/2022 |
OEV |
Turbidity Other limit is 5 NTU and reported value was 9.99 NTU at M-001. |
Operations staff turned EQs into a clarifier to capture most of the solids from going out in the effluent. Ran polymer to keep solids from washing out of the clarifiers and alum as required per our permit. |
Violation |
U |
eSMR |
1101360 |
01/08/2022 |
OEV |
Turbidity 24-hour Average limit is 2 NTU and reported value was 3.98 NTU at M-001. |
Operations staff turned EQs into a clarifier to capture most of the solids from going out in the effluent. Ran polymer to keep solids from washing out of the clarifiers and alum as required per our permit. |
Violation |
U |
eSMR |
1101370 |
01/08/2022 |
OEV |
Turbidity Other limit is 10 NTU and reported value was 11 NTU at M-001. |
Operations staff turned EQs into a clarifier to capture most of the solids from going out in the effluent. Ran polymer to keep solids from washing out of the clarifiers and alum as required per our permit. |
Violation |
U |
eSMR |
1101347 |
01/08/2022 |
OEV |
Turbidity Other limit is 5 NTU and reported value was 9.99 NTU at M-001. |
Operations staff turned EQs into a clarifier to capture most of the solids from going out in the effluent. Ran polymer to keep solids from washing out of the clarifiers and alum as required per our permit. |
Violation |
U |
eSMR |
1101342 |
01/07/2022 |
OEV |
Turbidity Other limit is 10 NTU and reported value was 11 NTU at M-001. |
Operations staff turned EQs into a clarifier to capture most of the solids from going out in the effluent. Ran polymer to keep solids from washing out of the clarifiers and alum as required per our permit. |
Violation |
U |
eSMR |
1101359 |
01/07/2022 |
OEV |
Turbidity Other limit is 5 NTU and reported value was 9.99 NTU at M-001. |
Operations staff turned EQs into a clarifier to capture most of the solids from going out in the effluent. Ran polymer to keep solids from washing out of the clarifiers and alum as required per our permit. |
Violation |
U |
eSMR |
1098567 |
11/29/2021 |
OEV |
Total Coliform 7-Day Median limit is 2.2 MPN/100 mL and reported value was 6.1 MPN/100 mL at M-001. |
The cause of the coliform exceedance is unknown, however, the City has initiated an audit of all contracted samplers to ensure proper sampling techniques are being used. |
Violation |
U |
eSMR |
1098556 |
11/16/2021 |
OEV |
Turbidity Other limit is 10 NTU and reported value was 11 NTU at M-001. |
The cause of the high turbidity was due to lack of sludge hauling trailers. Operations staff made operational changes and coordinated with sludge hauling contractors in order to bring the turbidity below permit limits. |
Violation |
U |
eSMR |
1098564 |
11/07/2021 |
OEV |
Turbidity Other limit is 10 NTU and reported value was 11 NTU at M-001. |
The cause of the high turbidity was due to lack of sludge hauling trailers. Operations staff made operational changes and coordinated with sludge hauling contractors in order to bring the turbidity below permit limits. |
Violation |
U |
eSMR |
1098563 |
11/07/2021 |
OEV |
Turbidity Other limit is 5 NTU and reported value was 11 NTU at M-001. |
The cause of the high turbidity was due to lack of sludge hauling trailers. Operations staff made operational changes and coordinated with sludge hauling contractors in order to bring the turbidity below permit limits. |
Violation |
U |
eSMR |
1097176 |
10/05/2021 |
CAT2 |
4,4-DDE Daily Maximum limit is 0.0012 ug/L and reported value was 0.0031 ug/L at M-001. |
The City continues to implement the Pollutant Minimization Program (PMP) for this constituent and is currently conducting additional monitoring. |
Violation |
U |
eSMR |
1097174 |
10/05/2021 |
CAT2 |
4,4-DDE Monthly Average limit is 0.00059 ug/L and reported value was 0.0031 ug/L at M-001. |
The City continues to implement the Pollutant Minimization Program (PMP) for this constituent and is currently conducting additional monitoring. |
Violation |
U |
eSMR |
1095946 |
09/13/2021 |
OEV |
Turbidity Daily Average (Mean) limit is 2 NTU and reported value was 3 NTU at M-001. |
Corrective actions included requesting more trailers and reducing flow from WRF No. 2 to alleviate the stress on WRF 1B. No additional violations occurred during the month of September. |
Violation |
U |
eSMR |
1093413 |
07/29/2021 |
OEV |
Turbidity 24-hour Average limit is 2 NTU and reported value was 3 NTU at M-001. |
Operators immediately stopped draining of digester #3 when turbidity increased, and no additional violations occurred. |
Violation |
U |
eSMR |
1093420 |
07/06/2021 |
CAT2 |
4,4-DDE Daily Maximum limit is 0.0012 ug/L and reported value was 0.0053 ug/L at M-001. |
The City continues to implement the Pollutant Minimization Program (PMP) for this constituent and is currently conducting additional monitoring. |
Violation |
U |
eSMR |
1093419 |
07/06/2021 |
CAT2 |
4,4-DDE Monthly Average limit is 0.00059 ug/L and reported value was 0.0053 ug/L at M-001. |
The City continues to implement the Pollutant Minimization Program (PMP) for this constituent and is currently conducting additional monitoring. |
Violation |
U |
eSMR |
1092615 |
06/24/2021 |
OEV |
Turbidity 24-hour Average limit is 2 NTU and reported value was 3 NTU at M-001. |
Lowered the flow to WRF 1B and performed enhanced chemical treatment: turned on polymer for the secondary clarifiers and ran alum at the filter structure.
|
Violation |
U |
eSMR |
1092611 |
06/23/2021 |
OEV |
Turbidity 24-hour Average limit is 2 NTU and reported value was 3 NTU at M-001. |
Lowered the flow to WRF 1B and performed enhanced chemical treatment: turned on polymer for the secondary clarifiers and ran alum at the filter structure.
|
Violation |
U |
eSMR |
1092609 |
06/22/2021 |
OEV |
Turbidity 24-hour Average limit is 2 NTU and reported value was 3 NTU at M-001. |
Lowered the flow to WRF 1B and performed enhanced chemical treatment: turned on polymer for the secondary clarifiers and ran alum at the filter structure.
|
Violation |
U |
eSMR |
1092616 |
06/21/2021 |
OEV |
Turbidity 24-hour Average limit is 2 NTU and reported value was 3 NTU at M-001. |
Lowered the flow to WRF 1B and performed enhanced chemical treatment: turned on polymer for the secondary clarifiers and ran alum at the filter structure.
|
Violation |
U |
eSMR |
1092612 |
06/20/2021 |
OEV |
Turbidity 24-hour Average limit is 2 NTU and reported value was 4 NTU at M-001. |
Lowered the flow to WRF 1B and performed enhanced chemical treatment: turned on polymer for the secondary clarifiers and ran alum at the filter structure.
|
Violation |
U |
eSMR |
1092627 |
06/20/2021 |
OEV |
Turbidity Other limit is 5 NTU and reported value was 7.16 NTU at M-001. |
Lowered the flow to WRF 1B and performed enhanced chemical treatment: turned on polymer for the secondary clarifiers and ran alum at the filter structure.
|
Violation |
U |
eSMR |
1092628 |
06/19/2021 |
OEV |
Turbidity 24-hour Average limit is 2 NTU and reported value was 4 NTU at M-001. |
Lowered the flow to WRF 1B and performed enhanced chemical treatment: turned on polymer for the secondary clarifiers and ran alum at the filter structure.
|
Violation |
U |
eSMR |
1092631 |
06/19/2021 |
OEV |
Turbidity Other limit is 5 NTU and reported value was 5.50 NTU at M-001. |
Lowered the flow to WRF 1B and performed enhanced chemical treatment: turned on polymer for the secondary clarifiers and ran alum at the filter structure.
|
Violation |
U |
eSMR |
1092622 |
06/18/2021 |
OEV |
Turbidity 24-hour Average limit is 2 NTU and reported value was 4 NTU at M-001. |
Lowered the flow to WRF 1B and performed enhanced chemical treatment: turned on polymer for the secondary clarifiers and ran alum at the filter structure.
|
Violation |
U |
eSMR |
1092613 |
06/18/2021 |
OEV |
Turbidity Other limit is 5 NTU and reported value was 5.15 NTU at M-001. |
Lowered the flow to WRF 1B and performed enhanced chemical treatment: turned on polymer for the secondary clarifiers and ran alum at the filter structure.
|
Violation |
U |
eSMR |
1092604 |
06/17/2021 |
OEV |
Turbidity 24-hour Average limit is 2 NTU and reported value was 3 NTU at M-001. |
Lowered the flow to WRF 1B and performed enhanced chemical treatment: turned on polymer for the secondary clarifiers and ran alum at the filter structure.
|
Violation |
U |
eSMR |
1089446 |
03/23/2021 |
OEV |
Turbidity Other limit is 5 NTU and reported value was 8.7 NTU at M-001. |
The cause of the high turbidity was due to hi-solids inventory overload in the system. Operations staff closely monitored turbidity levels and were able to maintain compliance with no additional turbidity exceedances. The RWQCB was immediately notified on the day of the violation. |
Violation |
U |
eSMR |
1089450 |
03/02/2021 |
CAT2 |
4,4-DDE Daily Maximum limit is 0.0012 ug/L and reported value was 0.0051 ug/L at M-001. |
The City has implemented a PMP to locate and minimize any potential sources. |
Violation |
U |
eSMR |
1089451 |
03/02/2021 |
CAT2 |
4,4-DDE Monthly Average limit is 0.00059 ug/L and reported value was 0.0036 ug/L at M-001. |
The City has implemented a PMP to locate and minimize any potential sources. |
Violation |
U |
eSMR |
1088200 |
02/17/2021 |
CAT2 |
4,4-DDE Maximum Daily (MDEL) limit is 0.0012 ug/L and reported value was 0.0054 ug/L at M-001. |
This constituent has been added to the PMP. The City is also working with its contract laboratory to ensure results are received during the same month. |
Violation |
U |
eSMR |
1088197 |
02/17/2021 |
CAT2 |
4,4-DDE Monthly Average limit is 0.00059 ug/L and reported value was 0.0054 ug/L at M-001. |
This constituent has been added to the PMP. The City is also working with its contract laboratory to ensure results are received during the same month. |
Violation |
U |
eSMR |
1088198 |
02/17/2021 |
CAT2 |
Dieldrin Maximum Daily (MDEL) limit is 0.00028 ug/L and reported value was 0.004 ug/L at M-001. |
This constituent has been added to the PMP. The City is also working with its contract laboratory to ensure results are received during the same month. |
Violation |
U |
eSMR |
1088196 |
02/17/2021 |
CAT2 |
Dieldrin Monthly Average limit is 0.00014 ug/L and reported value was 0.004 ug/L at M-001. |
This constituent has been added to the PMP. The City is also working with its contract laboratory to ensure results are received during the same month. |
Violation |
U |
eSMR |
1080706 |
09/15/2020 |
CAT2 |
Heptachlor Epoxide Daily Maximum limit is 0.00022 ug/L and reported value was 0.0076 ug/L at M-001. |
The City has began to implement a PMP for Heptachlor Epoxide. |
Violation |
U |
eSMR |
1080705 |
09/15/2020 |
CAT2 |
Heptachlor Epoxide Monthly Average limit is 0.00011 ug/L and reported value was 0.0076 ug/L at M-001. |
The City has began implementing a PMP for Heptachlor Epoxide. |
Violation |
U |
eSMR |
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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