Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
1144711 |
04/22/2025 |
DMON |
The influent flow meter was calibrated on April 21, 2025. There was, however, an issue with the influent flow meter, which was addressed on May 7, 2025. Because of the issues with the flow meter, the influent and calculated effluent monthly average and daily maximum flows from 4/22/25 - 5/8/25 are inaccurate and, therefore, not reportable, resulting in a deficiency in monitoring for April 2025. |
The flow meter was repaired on 5/7/25. |
Violation |
U |
eSMR |
1139033 |
01/02/2025 |
LREP |
Annual SMR ( PROGRPT ) (Advanced Water Treatment Fac) report for 2025 (2523321) was due on 01-JAN-25 |
|
Violation |
B |
Report |
1123271 |
01/02/2024 |
LREP |
Annual SMR ( PROGRPT ) (Advanced Water Treatment Fac) report for 2024 (2523303) was due on 01-JAN-24 |
|
Violation |
B |
Report |
1119144 |
05/31/2023 |
DMON |
The monitoring of p,p-DDT and p,p-DDD are monthly requirements. Both analytes are analyzed by EPA method 608.3 and were missed in May. The analyst referred to the TIWRP NPDES permit and misunderstood the requirements. |
The analyzing lab has clarified and reiterated the requirements outlined in the permit and sample chain-of-custodies to all staff. |
Violation |
U |
eSMR |
1112240 |
01/02/2023 |
LREP |
Annual SMR ( PROGRPT ) (Advanced Water Treatment Fac) report for 2023 (2523285) was due on 01-JAN-23 |
|
Violation |
B |
Report |
1111248 |
09/28/2022 |
DMON |
The total flow on September 28 is Not Representative and will not be reported in this Self-Monitoring Report. It is a daily required parameter. There were communication issues with the control system and the database after a cutover to a new faceplate and the data could not be recovered. |
N/A |
Violation |
B |
eSMR |
1109954 |
08/29/2022 |
CTOX |
Chronic Toxicity Maximum Daily (MDEL) limit is 0 Pass/Fail (Pass = 0, Fail = 1) and reported value was 1 Pass/Fail (Pass = 0, Fail = 1) at EFF-001. |
N/A |
Violation |
B |
eSMR |
1102124 |
03/02/2022 |
LREP |
Annual SMR ( PRETRPT ) report for 2021 (2362621) was due on 01-MAR-22 |
|
Violation |
B |
Report |
1102969 |
01/04/2022 |
DMON |
On January 4 an equipment communications issue for part of the day led to inaccurate data for influent flow. It was resolved that day, but there no instantaneous peak flow can be reported for the influent that day. |
NA |
Violation |
U |
eSMR |
1099060 |
01/02/2022 |
LREP |
Annual SMR ( PROGRPT ) (Advanced Water Treatment Fac) report for 2022 (2523267) was due on 01-JAN-22 |
|
Violation |
B |
Report |
1100567 |
11/01/2021 |
DMON |
On 11/1/2021 the effluent sample was improperly preserved for oil and grease analysis. The pH was greater than two, and therefor invalid. This was discovered on 11/9/2021, and as this is a weekly monitoring requirement, no resample for that week was possible. |
Staff were reminded to follow proper sample preservation procedure. |
Violation |
U |
eSMR |
1096401 |
08/24/2021 |
OEV |
pH Instantaneous Minimum limit is 6.5 SU and reported value was 3.3 SU at EFF-001. |
To prevent reoccurrence, TIWRP has changed Lockout Blackout procedures to isolate the chemical discharge line during maintenance. Additionally, chemical pumps will be uncoupled from their motors for rotation testing to prevent unintentional release of chemicals. |
Violation |
B |
eSMR |
1089858 |
02/21/2021 |
DMON |
The Los Angeles Harbor testing of HW-20 and HW-62 for chronic toxicity, and the concurrent effluent chronic toxicity testing, occurred late in February, with samples collected on the 22nd for the Harbor sites and the 21st for effluent. The reference toxicant test for this batch of samples failed, rendering the toxicity results invalid, and a re-sampling could not occur before the end of the month. This is a deficient monitoring violation as effluent chronic toxicity testing is required monthly. |
The March chronic toxicity testing was able to be scheduled earlier, on March 9th. |
Violation |
B |
eSMR |
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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