| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1131550 |
05/06/2024 |
CAT1 |
Carbonaceous Biochemical Oxygen Demand (CBOD) (5-day @ 20 Deg. C) Weekly Average limit is 40 mg/L and reported value was 64 mg/L at EFF-001. |
See April SMR for comprehensive details. |
Violation |
B |
Report |
| 1131549 |
05/04/2024 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45 mg/L and reported value was 104 mg/L at EFF-001. |
See April SMR for comprehensive details. |
Violation |
B |
Report |
| 1128659 |
04/30/2024 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30.0 mg/L and reported value was 35.0 mg/L at EFF-001. |
See April SMR for comprehensive details. |
Violation |
B |
Report |
| 1128656 |
04/04/2024 |
Order Conditions |
Did not comply with wet weather plant operational requirements, as described in Provision VI.C.5.c.iv(b). INF flow was not maximized while discharge from the Westside Transport/Storage Structure to Discharge Point No. 001 occurred. This resulted in approximately 6.4 MG of wastewater being discharged as decant rather than receiving primary treatment at OSP. |
Lift Pump #1 is in the process of being replaced and a backup pump is being used in the interim. |
Violation |
B |
Report |
| 1128654 |
03/29/2024 |
Order Conditions |
Did not comply with wet weather plant operational requirements, as described in Provision VI.C.5.c.iv(b). INF flow was not maximized while discharge from the Westside Transport/Storage Structure to Discharge Point No. 001 occurred. This resulted in approximately 7.6 MG of wastewater being discharged as decant rather than receiving primary treatment at OSP. |
Electricians arrived on site to reset Lift Pump #2 and influent flows increased to more than 43 MGD; Lift Pump #1 was not able to be restored during this storm. Lift Pump #1 is in the process of being replaced and a backup pump is being used in the interim. |
Violation |
B |
Report |
| 1128649 |
02/04/2024 |
Order Conditions |
Did not comply with wet weather plant operational requirements, as described in Provision VI.C.5.c.iv. INF flow was not maximized due to a power outage at the Westside Pump Station, which stopped all pumping to OSP. Per the February SMR cover letter, CSDs from Vicente and Lincoln occurred on 2/4 at 7:15 p.m. and 7:40 p.m., respectively. It is not possible to determine whether CSDs would have occurred if there hadn’t been a power loss. |
SFPUC staff used a backup generator to run a smaller pump until power was restored. No other corrective actions identified. |
Violation |
B |
Report |
| 1124422 |
11/29/2023 |
Order Conditions |
Did not comply with wet weather plant operational requirements, as described in Provision VI.C.5.c.iv(b). INF flow was not maximized while discharge from the Westside Transport/Storage Structure to Discharge Point No. 001 occurred. This resulted in approximately 0.75 MG of wastewater being discharged as decant rather than receiving primary treatment at OSP. |
The influent pump was reset and brought back online. |
Violation |
B |
Report |
| 1124424 |
11/28/2023 |
UAUTHDISC |
A dry weather discharge occurred on November 28 from CSD-007 (Sea Cliff No. 2 pump station) between 10:09-10:16 a.m. An estimated 5,500 gallons of untreated wastewater was discharged. |
Per SMR cover letter: "Corrective action is an ongoing progressive disciplinary process for the certified operators on-site when discharge occurred which will result in grounds for action up to and including termination. Additionally, lessons learned have been included for any planned process related projects in the future." |
Violation |
B |
Report |
| 1120989 |
10/01/2023 |
LREP |
Monthly SMR ( MONNPDES ) report for August 2023 (2326511) was due on 30-SEP-23 |
|
Violation |
B |
Report |
| 1119105 |
04/15/2023 |
CAT1 |
Carbonaceous Biochemical Oxygen Demand (CBOD) (5-day @ 20 Deg. C) Weekly Average limit is 40.0 mg/L and reported value was 69.0 mg/L at EFF-001. |
Per the SMR cover letter:
To prevent reoccurrence, the purge blowers’ status is being added to the OSP Operations Central Control Aeration Display for operators’ immediate attention; it was previously only viewable at the local control panel on the Aeration deck. Additional training on the secondary treatment system and purge blowers will be provided to operators using this incident as a case study.
See SMR for more details. |
Violation |
B |
Report |
| 1119103 |
04/15/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45.0 mg/L and reported value was 63.0 mg/L at EFF-001. |
Per the SMR cover letter:
To prevent reoccurrence, the purge blowers’ status is being added to the OSP Operations Central Control Aeration Display for operators’ immediate attention; it was previously only viewable at the local control panel on the Aeration deck. Additional training on the secondary treatment system and purge blowers will be provided to operators using this incident as a case study.
See SMR for more details. |
Violation |
B |
Report |
| 1115242 |
02/04/2023 |
CAT1 |
Total Suspended Solids (TSS) Weekly Average limit is 45.0 mg/L and reported value was 48.0 mg/L at EFF-001. |
Per the SMR cover letter:
In addition to repairing the primary sedimentation tanks and clearing them of accumulated solids, the following corrective actions were implemented to reduce TSS in the final effluent: polymer was added to the mixed liquor to increase settling in the secondary clarifiers, oxygen feed to aeration was increased, and flows were routed through the un-used chlorine contact channels to allow for additional solids settling after secondary clarification. |
Violation |
B |
Report |
| 1115240 |
01/31/2023 |
CAT1 |
Total Suspended Solids (TSS) Monthly Average limit is 30 mg/L and reported value was 31 mg/L at EFF-001. |
Per SMR cover letter:
In addition to repairing the primary sedimentation tanks and clearing them of accumulated solids, the following corrective actions were implemented to reduce TSS in the final effluent: polymer was added to the mixed liquor to increase settling in the secondary clarifiers, oxygen feed to aeration was increased, and flows were routed through the un-used chlorine contact channels to allow for additional solids settling after secondary clarification. |
Violation |
B |
Report |
| 1115241 |
01/31/2023 |
CAT1 |
Total Suspended Solids (TSS), Percent Removal Monthly Average limit is 85 and reported value was 84 at EFF-001. |
Per the SMR cover letter:
In addition to repairing the primary sedimentation tanks and clearing them of accumulated solids, the following corrective actions were implemented to reduce TSS in the final effluent: polymer was added to the mixed liquor to increase settling in the secondary clarifiers, oxygen feed to aeration was increased, and flows were routed through the un-used chlorine contact channels to allow for additional solids settling after secondary clarification. |
Violation |
B |
Report |
| 1115238 |
01/10/2023 |
Order Conditions |
Did not comply with wet weather plant operational requirements, as described in Provision VI.C.5.c.iv(b). INF flow was not maximized while discharge from the Westside Transport/Storage Structure to Discharge Point No. 001 occurred. This resulted in approximately 7 MG of wastewater being discharged as decant rather than receiving secondary treatment at OSP. |
Repair of the level sensors was completed on February 27. |
Violation |
B |
Report |
| 1115237 |
01/03/2023 |
Order Conditions |
Did not comply with wet weather plant operational requirements, as described in Provision VI.C.5.c.iv(b). INF flow was not maximized while discharge from the Westside Transport/Storage Structure to Discharge Point No. 001 occurred. This resulted in approximately 0.4 MG of wastewater being discharged as decant rather than receiving secondary treatment at OSP. |
Repair of the level sensors was completed on February 27. |
Violation |
B |
Report |
| 1115236 |
01/01/2023 |
Order Conditions |
Did not comply with wet weather plant operational requirements, as described in Provision VI.C.5.c.iv(b). INF flow was not maximized while discharge from the Westside Transport/Storage Structure to Discharge Point No. 001 occurred. This resulted in approximately 2.6 MG of wastewater being discharged as decant rather than receiving secondary treatment at OSP. |
Repair of the level sensors was completed on February 27. |
Violation |
B |
Report |
| 1115235 |
12/31/2022 |
Order Conditions |
Did not comply with wet weather plant operational requirements, as described in Provision VI.C.5.c.iv(b). INF flow was lost while discharge from the Westside Transport/Storage Structure to Discharge Point No. 001 occurred. This resulted in a less than 1% increase in the CSD volumes discharged from the Lake Merced (Discharge Point No. CSD-001), Vicente (CSD-002), and Lincoln (CSD-003) outfalls. |
OSP Operations rapidly coordinated with the on-call electrician who managed to restore manual control of OSP influent pumping by 2:15 p.m. |
Violation |
B |
Report |
| 1091449 |
02/15/2021 |
Order Conditions |
Did not comply with wet weather plant operational requirements, as described in Provision VI.C.5.c.iv(b). INF-001 did not reach 60 MGD prior to initiating discharge from the Westside Transport/Storage Structure to Discharge Point No. 001. This resulted in approximately 0.51 MGD (6% of total decant for the day) of extra untreated wastewater being discharged through EFF-001. |
Decant discharge pumping occurred early due to a misreading of the OSP influent flow meter. Wastewater Operations staff have been reminded of this minimum flow value and a large sign with the information has been posted in the plant control room. |
Violation |
B |
Report |
| 1087657 |
12/17/2020 |
Order Conditions |
Did not comply with wet weather plant operational requirements, as described in Provision VI.C.5.c.iv(b). INF-001 did not reach 60 MGD prior to initiating discharge from the Westside Transport/Storage Structure to Discharge Point No. 001. |
|
Violation |
B |
Report |
| 1076485 |
04/06/2020 |
Order Conditions |
Did not comply with wet weather plant operational requirements, as described in Provision VI.C.5.c.iv(b). INF-001 did not reach 60 MGD prior to initiating discharge from the Westside Transport/Storage Structure to Discharge Point No. 001. |
WWE Operations has implemented modifications to the chopper pump programming, which are expected to prevent or reduce future occurrences. |
Violation |
B |
Report |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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