| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1126367 |
03/30/2024 |
Deficient Reporting |
The Annual Progress Report was due on 2/28/2024 as part of the Compliance Schedule for Final Effluent Limitations for Chronic Toxicity. Due to staff changes and oversight of this reporting requirement, the University requested an extension on 2/16/2024 so that a thorough and useful update could be provided. At the time of the request, University staff were working with sewer system dischargers to understand the cause of past intermittant toxicity. |
Tracking and staffing will support the timely submittal of future reports. |
Violation |
U |
eSMR |
| 1123418 |
12/31/2023 |
CAT1 |
Biochemical Oxygen Demand (BOD) (5-day @ 20 Deg. C) Monthly Average limit is 10.0 mg/L and reported value was 13.0 mg/L at EFF-001. |
No corrective action was taken. BOD and TSS have started to trend down once school went back on session. |
Violation |
B |
eSMR |
| 1123419 |
12/30/2023 |
DMON |
The plant was experiencing high turbidity and the plant was put on diversion for most of the day. The pH and temperature were not measured during the approximate 40-minute window when the laboratory analyst was present due to a misunderstanding. The laboratory analyst thought that the plant was going to be discharging the rest of the day but the turbidity was high that the plant operator on site had to put the plant on diversion into the following morning. |
Better communications will be implemented between operations and laboratory. |
Violation |
B |
eSMR |
| 1117345 |
04/13/2023 |
OEV |
Total Coliform 7-Day Median limit is 2.2 MPN/100 mL and reported value was 4.5 MPN/100 mL at UVS-002. |
Please see email from 4/19/23. |
Violation |
B |
eSMR |
| 1117350 |
04/12/2023 |
OEV |
Total Coliform 7-Day Median limit is 2.2 MPN/100 mL and reported value was 13 MPN/100 mL at UVS-002. |
Please see email from 4/19/23. |
Violation |
B |
eSMR |
| 1117349 |
04/11/2023 |
OEV |
Total Coliform 7-Day Median limit is 2.2 MPN/100 mL and reported value was 13 MPN/100 mL at UVS-002. |
Please see email from 4/19/23. |
Violation |
B |
eSMR |
| 1117348 |
04/06/2023 |
OEV |
Total Coliform 7-Day Median limit is 2.2 MPN/100 mL and reported value was 4.5 MPN/100 mL at UVS-002. |
Please see email from 4/19/23 |
Violation |
B |
eSMR |
| 1117347 |
04/05/2023 |
OEV |
Total Coliform 7-Day Median limit is 2.2 MPN/100 mL and reported value was 4.5 MPN/100 mL at UVS-002. |
Please see email from 4/19/23 |
Violation |
B |
eSMR |
| 1117346 |
04/04/2023 |
OEV |
Total Coliform 7-Day Median limit is 2.2 MPN/100 mL and reported value was 3.25 MPN/100 mL at UVS-002. |
Please see email from 4/19/23 |
Violation |
B |
eSMR |
| 1114661 |
08/06/2022 |
DMON |
Deficient receiving water monitoring for temperature during the first week of August 2022 was due to an instrument operation error by field staff. Proper operation of the field instruments was reviewed when the error was discovered. |
|
Violation |
B |
Report |
| 1108097 |
03/24/2022 |
UAUTHDISC |
On March 24th, 2022 the UC Davis WWTP discharged non-disinfected treated effluent for approximately 1 hour and 19 minutes, from 00:29 to 01 :48. The discharge violation occurred due to a programming error in the new UV system. Channel #2, which was not in service, had an alarm interconnect to Channel #1, which was in service, that turned off the operational banks on Channel #1, causing non-disinfected water to be discharged. |
|
Violation |
B |
Report |
| 1101623 |
12/07/2021 |
CTOX |
Chronic Toxicity Other limit is 16 TUc and reported value was 17 TUc at EFF-001. |
|
Violation |
B |
Report |
| 1101621 |
10/24/2021 |
CAT1 |
UV Dose 1-Hour Average (Mean) limit is 127 mJ/cm2 and reported value was 94 mJ/cm2 at UVS-001. |
|
Violation |
B |
Report |
| 1091511 |
05/31/2021 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 10 mg/L and reported value was 12 mg/L at EFF-001. |
Repaired DO sensor and increased DO monitoring |
Violation |
B |
eSMR |
| 1071984 |
12/20/2019 |
Surface Water |
RSW-D monthly median dissolved oxygen fell below 85% saturation. The recorded value was 75% saturation. |
|
Violation |
B |
Report |
| 1068230 |
11/26/2019 |
OEV |
pH Instantaneous Minimum limit is 6.5 SU and reported value was 6.12 SU at EFF-001. |
Retrain laboratory technician on lab manager notification and re-testing procedures for confirmation when anomalous results are detected. |
Violation |
B |
eSMR |
| 1068231 |
11/18/2019 |
Surface Water |
The RSW-D DO Concentration was 6.5 mg/L, which is below 7.0 mg/L. The receiving water temperature was low (51 degrees) at the time of sample collection. |
The temperature of the receiving water will affect the DO level. In the future, samples will be collected at different times per day to show more representative conditions. Multiples samples will be collected in a month in the event that sample results drop below the receiving water limitations. |
Violation |
B |
eSMR |
| 1068232 |
11/18/2019 |
Surface Water |
The RSW-D monthly median and 95th percentile DO percent saturation was 60%, which is below both the monthly median limit of 85% and the 95th percentile limit which is 75%. |
The temperature of the receiving water will affect the DO level. In the future, samples will be collected at different times per day to show more representative conditions. Multiples samples will be collected in a month in the event that sample results drop below the receiving water limitations. |
Violation |
B |
eSMR |
| 1071982 |
09/24/2019 |
Surface Water |
Receiving water monthly median % saturation for dissolved oxygen fell below 85%. The recorded value was 83%. |
|
Violation |
B |
Report |
| 1064721 |
08/01/2019 |
Order Conditions |
Turbidity 24-hour Average limit is 2 NTU and reported value was 3.34 NTU at UVS-002. |
Corrected calculation |
Violation |
B |
eSMR |
| 1062991 |
07/23/2019 |
Order Conditions |
Turbidity 24-hour Average limit is 2 NTU and reported value was 2.63 NTU at UVS-002. |
Fixed calculation on spreadsheet |
Violation |
B |
eSMR |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
|
