| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1131471 |
07/10/2024 |
Deficient Reporting |
Echowater Facility lost continuous monitoring of the EFF-001 for approximately 8 minutes when a contractor working on upgrading the Emerson Ovation Plant Computer Control System made an error and connected a wire to the wrong system. Operations immediately diverted discharge from the river; however, it takes approximately 8 minutes for the valve to close. The dechlorination process continued to operate automatically by a local Programmable Logic Controller, and an area operator at that location manually checked and ensured all values remained within compliance with the permit; however, the 8 minutes of lost data could not be recovered. See cover letter for additional details. |
Discussed error with contractor prior to additional contract work. The contract has since been completed with no additional compliance issues associated with the upgrade to the Ovation system. |
Violation |
U |
eSMR |
| 1115051 |
02/01/2023 |
CAT2 |
Chlorine, Total Residual 1-Hour Average (Mean) limit is 0.018 mg/L and reported value was 0.28 mg/L at EFF-001. |
The unusual high slug of chlorine occurred due to unusual circumstances with the commissioning of the TTF facilities. The error following the SOP for returning from diversion was reviewed with staff to prevent reoccurrence. See cover letter for additional details. |
Violation |
B |
eSMR |
| 1114027 |
01/31/2023 |
CAT2 |
Copper, Total Monthly Average limit is 7.4 ug/L and reported value was 8.3 ug/L at EFF-001. |
See cover letters. Occurred during extreme rainfall events and peak solids loading conditions. Dissolved metals were significantly lower during this time. The higher copper was attributed to the wet weather, and an under performing Secondary Sedimentation Tank (SST #6). The SST was taken out of service until modification could be reviewed/designed/implemented. SRWTP is constructing the tertirary filtration facilities that will further remove additional solids during high flow events. |
Violation |
B |
eSMR |
| 1114028 |
01/07/2023 |
CAT1 |
Settleable Solids Weekly Average limit is 0.2 ml/L and reported value was 0.5 ml/L at EFF-001. |
See cover letter. Occurred during peak flow conditions after extreme rainfall events. Construction/operation of the new filtration process and modifications to Secondary Sedimentation Tank #6 will prevent solids breakthrough in the future. SST #6 has been taken out of service until modifications can be reviewed, designed, and implemented. |
Violation |
B |
eSMR |
| 1112739 |
12/02/2022 |
DMON |
Loss of continuous effluent monitoring for CL2, SO3, DO, pH for 1 minute and 20 seconds due to operator error. Operator was working on redundant sample pump and accidently opened a bypass valve that caused a loss of flow from the in service pump. |
Supervisor reviewed the SOP for with the staff that made the error to ensure similar error does not reoccur. |
Violation |
B |
eSMR |
| 1110656 |
10/06/2022 |
CAT2 |
Chlorine, Total Residual 1-Hour Average (Mean) limit is 0.018 mg/L and reported value was 0.086 mg/L at EFF-001. |
Added high and low alarms to the new chlorine control analyzers at the new tertiary facilities to alert operators so they can divert prior to sending chlorinated water to the dechlorination treatment process. Developing SOPs for the new TTF facilities. See cover4 letter for additional details. |
Violation |
B |
eSMR |
| 1111086 |
05/31/2022 |
DMON |
Effluent total residual chlorine, sulfur dioxide, sodium bisulfite, temperature, pH, DO, influent pH and emergency storage freeboard was not recorded due to a data server capacity issue for 2.75 hours on 3 May 2022 and for 5 hours on 4 May 2022. The issue has been resolved. |
|
Violation |
B |
Report |
| 1102622 |
02/28/2022 |
CAT2 |
Chlorine, Total Residual 1-Hour Average (Mean) limit is 0.019 mg/L and reported value was 0.255 mg/L at EFF-001. |
To prevent reoccurrence, SRWTP has replaced the batteries within the failed UPS, added the assets to the PM system and developed PM¿s based on similar UPS systems. SRWTP identified other UPS systems from Echowater Project that were not properly documented and added them to the maintenance software. SRWTP made several adjustments to the automatic power transfer programming. |
Violation |
B |
eSMR |
| 1110655 |
10/21/2021 |
DMON |
Lost sample pumps that feed EFF-001 continuous analyzers for pH, Dissolved Oxygen, Total Residual Chlorine, and Sulfur Dioxide for approximately 9 minutes. Error occurred during an unplanned SMUD power outage. Error occurred when redundant sample pumps/analyzers were offline for routine preventative maintenance. See cover letter for additional details. |
Electrical system responded as intended; however, unusual occurrence because routine PM was being performed on redundant sample pump/sample analyzers that continuously operate in tandem with the sample pump/analyzer system that lost power during the power outage. Reoccurrence is unlikely due to the normally operating redundant sampling system. |
Violation |
B |
eSMR |
| 1095886 |
09/30/2021 |
CAT2 |
Dichlorobromomethane Monthly Average (Mean) limit is 31 ug/L and reported value was 32 ug/L at EFF-001. |
SRWTP is actively constructing facilities that may further reduce Disinfection Byproducts in the future per the Time Schedule Order, and evaluating additional studies. |
Violation |
B |
eSMR |
| 1091465 |
05/02/2021 |
DMON |
On May 2, 2021 laboratory staff collected a CFE sample while SRWTP was in diversion. This sample was taken while SRWTP was not discharging to the Sacramento River, therefore the sample was not representative of the discharge for that day. |
To prevent reoccurrence, the error was discussed with staff and the laboratory added a requirement to the sample collection sheet for staff to check and report the flow at the time the samples were collected |
Violation |
B |
eSMR |
| 1089522 |
03/26/2021 |
CAT2 |
Chlorine, Total Residual 1-Hour Average (Mean) limit is 0.019 mg/L and reported value was 0.023 mg/L at EFF-001. |
To prevent reoccurrence, the error was discussed with staff, and additional operations staff were reminded to follow the standard practice while SRWTP continues to commission the BNR. |
Violation |
B |
eSMR |
| 1092573 |
12/13/2020 |
Order Conditions |
On 13 December 2020, approximately 400,000 gallons of Chlorinated Secondary Effluent (CSE) spilled at the Facility due to a failure of a restrained coupler in an underground high pressure reclaimed water pipe. The majority of the spill discharged to pavement and drained back to the treatment plant¿s headworks; however, a portion of the spill discharged to dry land and was not recovered. No surface water was impacted by the spill. The failed section of pipe was replaced with a restrained sleeve coupling in accordance with current design standards and recurrence of the spill is unlikely. The 13 December 2020 spill is a violation of WDRs Discharge Prohibition III.A, which prohibits discharge of wastewater in a manner different from what the WDRs describe. |
|
Violation |
B |
Report |
| 1083509 |
11/16/2020 |
Order Conditions |
On 16 November 2020, approximately 4,280 gallons of Chlorinated Secondary Effluent (CSE) spilled at the Facility because a contractor struck a hydrant with a vehicle in an active contruction zone. The spill occured for a duration of 5 minutes dispersed to dry land and sanitary drains nearby and no CSE discharged to surface water during the event. Sanitary drains return flow to SRWTP for retreatment. No surface water was impacted by this spill and no one was injured as a result of this spill. |
This incident has been determined as contractor fault due to not maintaining careful observation of their surroundings. The hydrant is located in an active contruction zone and the contract documents require 2 bollards placed at each hydrant. The contractor has been directed to install the bollards as soon as possible. |
Violation |
B |
eSMR |
| 1085507 |
11/01/2020 |
DMON |
On October 20, 2020 SRWTP had a power failure at the outfall facility where continuous effluent monitoring is performed prior to effluent discharge to the Sacramento River. This resulted in effluent discharge that was not monitored for pH, dissolved oxygen, total residual chlorine, and sulfur dioxide (or sodium bisulfite) for a period of approximately nine minutes. A second power failure occurred on 27 October 2020 which resulted in a loss of effluent continuous monitoring for pH, dissolved oxygen, total residual chlorine, and sulfur dioxide (or sodium bisulfite), temperature and flow rate for a period of nine minutes and 32 seconds. No loss of treatment occurred during either of these power failures. |
|
Violation |
B |
Report |
| 1085508 |
10/29/2020 |
Order Conditions |
On 29 October 2020, approximately 4.5 million gallons of CSE spilled at the Facility for a duration of approximately 40 minutes due to a closed motorized gate blocking flow while diverting flow to Emergency Storage Basin A . The spill discharged to dry land and storm water and plant drainage structures that return flow to the headworks for retreatment. The spill was contained within the Facility and no surface water was impacted. The 29 October 2020 spill is a violation of WDRs Discharge Prohibition III.A, which prohibits discharge of wastewater in a manner different from what the WDRs describe. |
|
Violation |
B |
Report |
| 1071354 |
01/08/2020 |
CAT2 |
Copper, Total Daily Maximum limit is 12 ug/L and reported value was 17 ug/L at EFF-001. |
Regional San performed an incident investigation which evaluated treatment plant operation and maintenance activities, collection system activities, industrial dischargers that could discharge copper, and waste haulers. There was no unusual maintenance activities or operational changes at the plant that would have increased copper concentrations in the effluent. The investigation did not identify any unusual collection system activities, septage discharges, or industrial discharges that would be expected to increase the copper concentrations in the SRWTP influent or effluent. To prevent reoccurrence, Regional San will continue to evaluate and manage copper loading of industrial and septage discharges, and continue efforts to minimize illicit discharges from permitted and non-permitted dischargers. |
Violation |
B |
eSMR |
| 1070804 |
12/31/2019 |
DMON |
Eleven parameters required were not measured in the H2 2019 eSMR:
Arsenic, total recoverable
Cadmium, total recoverable
Chromium, total recoverable
Copper, total recoverable
Lead, total recoverable
Mercury, total recoverable
Nickle, total recoverable
Zinc, total recoverable
Electrical Conductivity @ 25°C
Nitrate Nitrogen, Total (as N)
Total Dissolved Solids |
|
Violation |
B |
Report |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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