| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1125278 |
02/29/2024 |
CAT1 |
Total Suspended Solids (TSS), Percent Removal Monthly Average limit is 85 % and reported value was 83.6 % at EFF-001. |
Operators noticed an unusual increase in flow from previous storm events with similar inches of rainfall. Operators performed an investigation during the lighter periods of the storms to find any sources of I/I. Major sources of inflow were found around the city and were brought up to the City of Avalon. Since then, we have worked with the city to eliminate or reduce these sources of inflow. The investigation is ongoing. |
Violation |
U |
eSMR |
| 1124280 |
01/31/2024 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30 mg/L and reported value was 51.7 mg/L at EFF-001. |
Facility staff will continue to keep a close watch on effluent TSS to ensure that the process has completely stabilized and kept on track. The addition of a disc filter being installed between the clarifier common channel and the chlorine contact basin is currently being proposed to the city. This addition would greatly aid in the prevention of any further TSS exceedances. |
Violation |
U |
eSMR |
| 1124282 |
01/31/2024 |
CAT1 |
Total Suspended Solids (TSS), Percent Removal Monthly Average limit is 85 % and reported value was 63.3 % at EFF-001. |
Facility staff will continue to keep a close watch on effluent TSS to ensure that the process has completely stabilized and kept on track. The addition of a disc filter being installed between the clarifier common channel and the chlorine contact basin is currently being proposed to the city. This addition would greatly aid in the prevention of any further TSS exceedances. |
Violation |
U |
eSMR |
| 1124284 |
01/19/2024 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45 mg/L and reported value was 65.4 mg/L at EFF-001. |
Facility staff will continue to keep a close watch on effluent TSS to ensure that the process has completely stabilized and kept on track. The addition of a disc filter being installed between the clarifier common channel and the chlorine contact basin is currently being proposed to the city. This addition would greatly aid in the prevention of any further TSS exceedances. |
Violation |
U |
eSMR |
| 1124283 |
01/12/2024 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45 mg/L and reported value was 53.1 mg/L at EFF-001. |
Facility staff will continue to keep a close watch on effluent TSS to ensure that the process has completely stabilized and kept on track. The addition of a disc filter being installed between the clarifier common channel and the chlorine contact basin is currently being proposed to the city. This addition would greatly aid in the prevention of any further TSS exceedances. |
Violation |
U |
eSMR |
| 1124281 |
01/05/2024 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45 mg/L and reported value was 54.6 mg/L at EFF-001. |
Facility staff will continue to keep a close watch on effluent TSS to ensure that the process has completely stabilized and kept on track.
The addition of a disc filter being installed between the clarifier common channel and the chlorine contact basin is currently being proposed to the city. This addition would greatly aid in the prevention of any further TSS exceedances. |
Violation |
U |
eSMR |
| 1123284 |
12/31/2023 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30 mg/L and reported value was 55.5 mg/L at EFF-001. |
The Avalon Wastewater Treatment Facility started a rehab project on the contact chamber on 11/28/2023. The contact chamber needed to be bypassed for this project and fed straight to the effluent pipe to the outfall. Due to the damage of the diversion walls and surrounding concrete in the contact chamber, this project was critical to complete. However, due to the loss of contact time through the contact basin and the turbulence of the flow through the common channel before
entering the bypass, TSS problems were present with our effluent.
The contact basin was brought back online on 1/15/2024 and is resuming normal operations. |
Violation |
U |
eSMR |
| 1123285 |
12/31/2023 |
CAT1 |
Total Suspended Solids (TSS), Percent Removal Monthly Average limit is 85 % and reported value was 70.1 % at EFF-001. |
The Avalon Wastewater Treatment Facility started a rehab project on the contact chamber on 11/28/2023. The contact chamber needed to be bypassed for this project and fed straight to the effluent pipe to the outfall. Due to the damage of the diversion walls and surrounding concrete in the contact chamber, this project was critical to complete. However, due to the loss of contact time through the contact basin and the turbulence of the flow through the common channel before
entering the bypass, TSS problems were present with our effluent.
The contact basin was brought back online on 1/15/2024 and is resuming normal operations. |
Violation |
U |
eSMR |
| 1123283 |
12/29/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45 mg/L and reported value was 53.2 mg/L at EFF-001. |
The Avalon Wastewater Treatment Facility started a rehab project on the contact chamber on 11/28/2023. The contact chamber needed to be bypassed for this project and fed straight to the effluent pipe to the outfall. Due to the damage of the diversion walls and surrounding concrete in the contact chamber, this project was critical to complete. However, due to the loss of contact time through the contact basin and the turbulence of the flow through the common channel before
entering the bypass, TSS problems were present with our effluent.
The contact basin was brought back online on 1/15/2024 and is resuming normal operations. |
Violation |
U |
eSMR |
| 1123279 |
12/22/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45 mg/L and reported value was 58.4 mg/L at EFF-001. |
The Avalon Wastewater Treatment Facility started a rehab project on the contact chamber on 11/28/2023. The contact chamber needed to be bypassed for this project and fed straight to the effluent pipe to the outfall. Due to the damage of the diversion walls and surrounding concrete in the contact chamber, this project was critical to complete. However, due to the loss of contact time through the contact basin and the turbulence of the flow through the common channel before
entering the bypass, TSS problems were present with our effluent.
The contact basin was brought back online on 1/15/2024 and is resuming normal operations.. |
Violation |
U |
eSMR |
| 1123282 |
12/15/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45 mg/L and reported value was 58.9 mg/L at EFF-001. |
The Avalon Wastewater Treatment Facility started a rehab project on the contact chamber on 11/28/2023. The contact chamber needed to be bypassed for this project and fed straight to the effluent pipe to the outfall. Due to the damage of the diversion walls and surrounding concrete in the contact chamber, this project was critical to complete. However, due to the loss of contact time through the contact basin and the turbulence of the flow through the common channel before
entering the bypass, TSS problems were present with our effluent.
The contact basin was brought back online on 1/15/2024 and is resuming normal operations. |
Violation |
U |
eSMR |
| 1123281 |
12/08/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45 mg/L and reported value was 57.1 mg/L at EFF-001. |
The Avalon Wastewater Treatment Facility started a rehab project on the contact chamber on 11/28/2023. The contact chamber needed to be bypassed for this project and fed straight to the effluent pipe to the outfall. Due to the damage of the diversion walls and surrounding concrete in the contact chamber, this project was critical to complete. However, due to the loss of contact time through the contact basin and the turbulence of the flow through the common channel before
entering the bypass, TSS problems were present with our effluent.
The contact basin was brought back online on 1/15/2024 and is resuming normal operations. |
Violation |
U |
eSMR |
| 1123280 |
12/01/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45 mg/L and reported value was 61.9 mg/L at EFF-001. |
The Avalon Wastewater Treatment Facility started a rehab project on the contact chamber on 11/28/2023. The contact chamber needed to be bypassed for this project and fed straight to the effluent pipe to the outfall. Due to the damage of the diversion walls and surrounding concrete in the contact chamber, this project was critical to complete. However, due to the loss of contact time through the contact basin and the turbulence of the flow through the common channel before
entering the bypass, TSS problems were present with our effluent.
The contact basin was brought back online on 1/15/2024 and is resuming normal operations. |
Violation |
U |
eSMR |
| 1121772 |
09/30/2023 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30 mg/L and reported value was 48.5 mg/L at EFF-001. |
Reduced MLSS concentrations to desired levels of ~1900 mg/L. No DO probes in aeration basins for continuous data. Currently have a trial YSI probe in aeration basin #1 and will install DO probes in each basin after trials. Blower project progressing. Adjusted process flow for better contact time for polymers. Added WE-2013 polymer tote before clarifiers. Cleaned out contact basin twice and cleaned out all clarifiers. Using 12.5% hypochlorite in contact basin. Offered future disc filter plans to city. |
Violation |
U |
eSMR |
| 1121773 |
09/30/2023 |
CAT1 |
Total Suspended Solids (TSS), Percent Removal Monthly Average limit is 85 % and reported value was 81.9 % at EFF-001. |
Reduced MLSS concentrations to desired levels of ~1900 mg/L. Continue pushing for mounted DO probes in each aeration basin. Blower project progressing. Adjusted process flow for longer contact time for polymers. Pushing contact basin renovation project. Thoroughly cleaned out contact basin and all clarifiers. Using 12.5% hypochlorite in contact basin. Offered plans to city about potentially adding a disc filter between clarifiers and contact basin. |
Violation |
U |
eSMR |
| 1121771 |
09/22/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45 mg/L and reported value was 60.6 mg/L at EFF-001. |
Reduced MLSS concentrations to desired levels of ~1900 mg/L. No DO probes in aeration basins for continuous data. Currently have a trial YSI probe in aeration basin #1 and will install DO probes in each basin after trials. Blower project progressing. Adjusted process flow for better contact time for polymers. Added WE-2013 polymer tote before clarifiers. Cleaned out contact basin twice and cleaned out all clarifiers. Using 12.5% hypochlorite in contact basin. Offered future disc filter plans to city. |
Violation |
U |
eSMR |
| 1121770 |
09/08/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45 mg/L and reported value was 60.3 mg/L at EFF-001. |
Reduced MLSS concentrations to desired levels of ~1900 mg/L. No DO probes in aeration basins for continuous data. Currently have a trial YSI probe in aeration basin #1 and will install DO probes in each basin after trials. Blower project progressing. Adjusted process flow for better contact time for polymers. Added WE-2013 polymer tote before clarifiers. Cleaned out contact basin twice and cleaned out all clarifiers. Using 12.5% hypochlorite in contact basin. Offered future disc filter plans to city. |
Violation |
U |
eSMR |
| 1121774 |
09/01/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45 mg/L and reported value was 57 mg/L at EFF-001. |
Reduced MLSS concentrations to desired levels of ~1900 mg/L. No DO probes in aeration basins for continuous data. Currently have a trial YSI probe in aeration basin #1 and will install DO probes in each basin after trials. Blower project progressing. Adjusted process flow for better contact time for polymers. Added WE-2013 polymer tote before clarifiers. Cleaned out contact basin twice and cleaned out all clarifiers. Using 12.5% hypochlorite in contact basin. Offered future disc filter plans to city. |
Violation |
U |
eSMR |
| 1120991 |
08/31/2023 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30 mg/L and reported value was 42.4 mg/L at EFF-001. |
High mixed liquor concentrations. Increased wasting for solids removal from the system and are now where we want our MLSS concentrations.
DO problems. No DO probes in aeration basins for continuous data. Currently have a trial YSI probe in aeration basin #3 and will install 3 DO probes after trials. Also only have two old blowers that supply air to the aeration basins and aerobic digesters. Days where despite us sending all available air to aeration basins, still not enough to reach desired DO concentrations. Currently three new blowers on-site, but need the final installation completed alongside the rest of the wiring work into SCADA.
C-6262 polymer used for our centrifuge no longer separating solids effectively. Jar testing was performed. Determined that we get an improved solids separation using a different mix of polymers. Polymers C-319 and WE-2013 are now mixed in before the final product. Improved solids separation means more solids leaving in the form of cake and less being returned to the plant in the form of centrate.
Cleaned out contact basin and one clarifier. Will begin the process of cleaning out another clarifier this week and the final clarifier soon after. Having our contact basin looked at for concrete repair and for a special protective coating that will protect the concrete and make cleaning even easier. Cleaning of the contact basin and clarifiers more regularly in the future.
Switched from using HTH to 12.5% sodium hypochlorite in the contact basin, giving a more consistent and effective means of sterilizing not only coliforms, but algae or any organic growth that could accumulate in the basin.
Offered the idea to the City of Avalon about the addition of a disc filter unit between the clarifiers and contact basin that would completely eliminate any total suspended solids problems we currently have and would keep our TSS results well below any NPDES permit limitation in the future. |
Violation |
U |
eSMR |
| 1120990 |
08/18/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45 mg/L and reported value was 65.6 mg/L at EFF-001. |
High mixed liquor concentrations. Increased wasting for solids removal from the system and are now where we want our MLSS concentrations.
DO problems. No DO probes in aeration basins for continuous data. Currently have a trial YSI probe in aeration basin #3 and will install 3 DO probes after trials. Also only have two old blowers that supply air to the aeration basins and aerobic digesters. Days where despite us sending all available air to aeration basins, still not enough to reach desired DO concentrations. Currently three new blowers on-site, but need the final installation completed alongside the rest of the wiring work into SCADA.
C-6262 polymer used for our centrifuge no longer separating solids effectively. Jar testing was performed. Determined that we get an improved solids separation using a different mix of polymers. Polymers C-319 and WE-2013 are now mixed in before the final product. Improved solids separation means more solids leaving in the form of cake and less being returned to the plant in the form of centrate.
Cleaned out contact basin and one clarifier. Will begin the process of cleaning out another clarifier this week and the final clarifier soon after. Having our contact basin looked at for concrete repair and for a special protective coating that will protect the concrete and make cleaning even easier. Cleaning of the contact basin and clarifiers more regularly in the future.
Switched from using HTH to 12.5% sodium hypochlorite in the contact basin, giving a more consistent and effective means of sterilizing not only coliforms, but algae or any organic growth that could accumulate in the basin.
Offered the idea to the City of Avalon about the addition of a disc filter unit between the clarifiers and contact basin that would completely eliminate any total suspended solids problems we currently have and would keep our TSS results well below any NPDES permit limitation in the future.
|
Violation |
U |
eSMR |
| 1120087 |
07/31/2023 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30 mg/L and reported value was 51.1 mg/L at EFF-001. |
To prevent this problem from occurring in the future, extra polymer totes will be ordered on top of what is needed so that there is always a stockpile on hand. The facility¿s crew has been made aware of this issue and have been instructed to keep track of how many totes are on-site, with a special emphasis on the amount of polymer left in the active tote so that a new tote can be ordered immediately. |
Violation |
U |
eSMR |
| 1120085 |
07/21/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45 mg/L and reported value was 67.1 mg/L at EFF-001. |
To prevent this problem from occurring in the future, extra polymer totes will be ordered on top of what is needed so that there is always a stockpile on hand. The facility¿s crew has been made aware of this issue and have been instructed to keep track of how many totes are on-site, with a special emphasis on the amount of polymer left in the active tote so that a new tote can be ordered immediately. |
Violation |
U |
eSMR |
| 1120088 |
07/14/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45 mg/L and reported value was 60.2 mg/L at EFF-001. |
To prevent this problem from occurring in the future, extra polymer totes will be ordered on top of what is needed so that there is always a stockpile on hand. The facility¿s crew has been made aware of this issue and have been instructed to keep track of how many totes are on-site, with a special emphasis on the amount of polymer left in the active tote so that a new tote can be ordered immediately. |
Violation |
U |
eSMR |
| 1120086 |
07/07/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45.0 mg/L and reported value was 46.2 mg/L at EFF-001. |
To prevent this problem from occurring in the future, extra polymer totes will be ordered on top of what is needed so that there is always a stockpile on hand. The facility¿s crew has been made aware of this issue and have been instructed to keep track of how many totes are on-site, with a special emphasis on the amount of polymer left in the active tote so that a new tote can be ordered immediately. |
Violation |
B |
eSMR |
| 1117818 |
04/06/2023 |
CAT2 |
TCDD Equivalents Monthly Average limit is 0.24 pg/L and reported value was 1.23 pg/L at EFF-001. |
In the future, plant staff will avoid using the drying beds during rainfall events and install plugs in the drain piping connecting the drying beds to the plants process. |
Violation |
U |
eSMR |
| 1106040 |
07/11/2022 |
LREP |
Report submitted 4 days late (Received on: 05/19/2020). |
|
Violation |
B |
Report |
| 1113638 |
03/31/2022 |
Deficient Reporting |
Oil and Grease, Total Organic Carbon, and Total Dissolved Solids were sampled, packaged, and placed on a ferry boat to be picked up by a Cal Science lab courier. However, the samples were not picked up nor analyzed by the lab. A resample occurred but in April 2022. |
|
Violation |
B |
Report |
| 1099059 |
11/30/2021 |
CAT2 |
TCDD Equivalents Monthly Average (Mean) limit is 0.24 pg/L and reported value was 0.501 pg/L at EFF-001. |
As this violation was an abnormality, we will continue monitoring to determine if it was a bad sample or if further measures need to be implemented to prevent future exceedances. |
Violation |
B |
eSMR |
| 1106799 |
07/31/2021 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average (Mean) limit is 30 mg/L and reported value was 40.05 mg/L at EFF-001. |
|
Violation |
B |
Report |
| 1093988 |
07/31/2021 |
CAT1 |
Total Suspended Solids (TSS), Percent Removal Monthly Average (Mean) limit is 85.0 % and reported value was 56.6 % at EFF-001. |
Closely monitor influent sampling for anomalies. |
Violation |
B |
eSMR |
| 1106801 |
07/16/2021 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average (Mean) limit is 45 mg/L and reported value was 90 mg/L at EFF-001. |
|
Violation |
B |
Report |
| 1064047 |
06/30/2019 |
Deficient Reporting |
Did not sample for Dissolved Oxygen Monthly. |
|
Violation |
B |
Report |
| 1064055 |
06/30/2019 |
Deficient Reporting |
Did not sample for Organic Nitrogen, Total Phosphorus, Mercury and Cyanide Quarterly. |
|
Violation |
B |
Report |
| 1064048 |
06/21/2019 |
Deficient Reporting |
Did not sample for Enterococcus weekly from 6/1/19 to 6/21/19. |
|
Violation |
B |
Report |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
|
