| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1115297 |
03/31/2023 |
CAT1 |
Total Organic Carbon (TOC), Percent Removal Monthly Average limit is 85 % and reported value was 76 % at M-001. |
A thorough review of the analyses, sample handling; plant processes including abundance and structure of the microflora in the secondary processes indicate that the marginal loss of efficiency by approximately 11% was solely attributable to the very dilute influent TOC.
The plant continues to monitor the same processes and is expecting to maintain compliance continuously. If there is a repeat, then management will be informed to review our I/I efforts more rigorously. |
Violation |
U |
eSMR |
| 1110429 |
10/31/2022 |
DMON |
After detailed reviews of laboratory workflow performed on November 1, 2022 revealed a lack of sampling for Silica and Urea during the month of October 2022; and a follow up inspection of our laboratory¿s archived samples also confirmed that no extra sample was archived for that month, we concluded that there was no resource available to perform the mandated analyses. |
Laboratory management in consultation with the QA/QC Chemist implemented the following controls:
a. A monthly sample of preserved and unpreserved samples will be archived beginning November 15, 2022;
b. The QA/QC Chemist modified her schedule ¿cheat sheet¿ for compliance sampling control to include sampling reminders for the missed samples |
Violation |
B |
eSMR |
| 1102126 |
03/02/2022 |
LREP |
Annual SMR ( TECHRPT ) (Infiltration/Inflow/Spill prevention) report for 2021 (2022569) was due on 01-MAR-22 |
|
Violation |
B |
Report |
| 1097279 |
10/31/2021 |
CAT1 |
Total Organic Carbon (TOC) Monthly Average (Mean) limit is 20 mg/L and reported value was 20.17 mg/L at M-001. |
The cause of the performance excursion is still being reviewed and errors and the results will be communicated to the Regional Board before or within the next monthly report. |
Violation |
B |
eSMR |
| 1097280 |
10/08/2021 |
CAT1 |
Total Organic Carbon (TOC) Weekly Average (Mean) limit is 23 mg/L and reported value was 25.6 mg/L at M-001. |
The cause of the performance excursion is still being reviewed and errors and the results will be communicated to the Regional Board before or within the next monthly report. |
Violation |
B |
eSMR |
| 1095860 |
09/30/2021 |
CAT1 |
Total Organic Carbon (TOC) Monthly Average (Mean) limit is 20 mg/L and reported value was 21.63 mg/L at M-001. |
A formal review of the exceedance is to be convened with Plant Management, meanwhile this exceedance is considered a consequence of the ongoing operational changes to respond to increasingly shrinking flow volumes and attempts to optimize the efficiency of the Trickling Filter/Solids Contact Tanks at the facility. |
Violation |
B |
eSMR |
| 1080295 |
09/30/2020 |
CAT1 |
Total Organic Carbon (TOC) Monthly Average (Mean) limit is 20 mg/L and reported value was 20.5 mg/L at M-001. |
The following steps have been taken:
Plant management requested a review of year-long analyses, and recommendations for improvement from the designated contracting firm. We are currently awaiting the results and recommendations for review:
Operations implemented additional treatment steps since the last compliance report and this has resulted in the reduced severity of the current violation, as well as produced the ongoing concentrations of <16.0 mg/L in the month of October.
Those repairs seem to have registered modest improvements in the biological floc at the secondary stage, and therefore no additional changes are contemplated at this time. |
Violation |
B |
eSMR |
| 1079745 |
08/31/2020 |
CAT1 |
Total Organic Carbon (TOC) Monthly Average (Mean) limit is 20 mg/L and reported value was 24.1 mg/L at M-001. |
The calculations which derive the monthly average values were rechecked for arithmetic and /or transcription errors and were found to be consistent with the standard protocols. The resulting violations were discussed with the System Manager in view of the ongoing effort and engagement with an Engineering firm in an effort to develop appropriate responses to the challenges. Any
communications with the consultants will be reviewed promptly for feasibility of application.
Further developments will be communicated to the Regional Board before or within the next monthly
report. |
Violation |
B |
eSMR |
| 1079746 |
08/22/2020 |
CAT1 |
Total Organic Carbon (TOC) Weekly Average (Mean) limit is 25 mg/L and reported value was 33.9 mg/L at M-001. |
The calculations which derive the weely average values were rechecked for arithmetic and /or transcription errors and were found to be consistent with the standard protocols.
The resulting violations were discussed with the System Manager in view of the ongoing effort and engagement with an Engineering firm in an effort to develop appropriate responses to the challenges. Any communications with the consultants will be reviewed promptly for feasibility of application. Further developments will be communicated to the Regional Board before or within the next monthly report |
Violation |
B |
eSMR |
| 1070149 |
12/31/2019 |
CAT1 |
Total Organic Carbon (TOC), Percent Removal Monthly Average (Mean) limit is 85 % and reported value was 82.5 % at M-001. |
TOC concentration in the preceding three months was approximately 150mg/L, whereas December¿s
influent concentration was 88.3mg/L amounting to <60% of the usual concentration. Under these
circumstances the 82% removal efficiency is not unusual with a very efficient secondary removal
process. Therefore there are no other immediate remedial actions contemplated at an operational level. |
Violation |
B |
eSMR |
| 1070152 |
12/16/2019 |
CAT2 |
Chlorine, Total Residual Daily Maximum limit is 1.1 mg/L and reported value was 1.24 mg/L at M-001. |
The reviews included an audit of the work log of Operations which indicate that the
Instrumentation group was alerted on December 14 after a regular check indicated that the automated readings were at a significant variance with the readings from the meter that Operators use to monitor the online sensors. As a result of that initial discovery Operations Manager instructed Instrumentation
to review or replace the technology currently in use.
Secondly, the the Laboratory has instituted routine monitoring of the online meter with a compliant method using staff trained and tested according to ELAP¿s PT (Proficiency Testing) requirements. This process will start on February 1, 2020. now that the Plant is in continuous Chlorine disinfection process for the foreseeable future. |
Violation |
B |
eSMR |
| 1070151 |
12/14/2019 |
CAT2 |
Chlorine, Total Residual Daily Maximum limit is 1.1 mg/L and reported value was 1.42 mg/L at M-001. |
The reviews included an audit of the work log of Operations which indicate that the
Instrumentation group was alerted on December 14 after a regular check indicated that the automated
readings were at a significant variance with the readings from the meter that Operators use to monitor
the online sensors. As a result of that initial discovery Operations Manager instructed Instrumentation
to review or replace the technology currently in use.
Secondly, the review of the SCADA tags indicated that a revision is in order to capture the daily minimum; daily maximum Total Chlorine Residual concentrations daily now that the Plant is in continuous Chlorine disinfection process for the foreseeable future. |
Violation |
B |
eSMR |
| 1070150 |
12/10/2019 |
CAT2 |
Chlorine, Total Residual Daily Maximum limit is 1.1 mg/L and reported value was 1.85 mg/L at M-001. |
Detailed reviews of data collection and reduction processes were undertaken by Operations; Plant
Electronics and Instrumentation; IT support and the laboratory together with the Wastewater System
Manager. The reviews included an audit of the work log of Operations which indicate that the
Instrumentation group was alerted on December 14 after a regular check indicated that the automated
readings were at a significant variance with the readings from the meter that Operators use to monitor
the online sensors. As a result of that initial discovery Operations Manager instructed Instrumentation
to review or replace the technology currently in use.
Secondly, the review of the SCADA tags indicated that a revision is in order to capture the daily
minimum; daily maximum Total Chlorine Residual concentrations daily now that the Plant is in continuous Chlorine disinfection process. |
Violation |
B |
eSMR |
| 1070147 |
12/03/2019 |
Surface Water |
Enterococci Single Sample Maximum limit is 104 CFU/100 mL and reported value was >4879 CFU/100 mL at R-A. |
Detailed reviews of sample integrity; sample handling; analytical processes and data quality were performed in the laboratory following the unusually high values specific to Enterococci samples of December 3, 2019 at three receiving water sites along the 30 foot contour. There were no discernible system or sample errors associated with these samples, however, this sampling date was associated with heavy winter storms in the Santa Cruz area. And although other indicator bacteria parameters were within compliance limits, each indicator was associated with unusual and often confluent bacteria growth. This is indicative of the contributions of other bacteria that may have been taken with the grab samples at these three stations. Because of the high concentrations of the background and non-indicator species, the lab has introduced a different sample dilution ratio for these samples for similar weather conditions in the future. |
Violation |
B |
eSMR |
| 1070153 |
12/03/2019 |
Surface Water |
Enterococci Single Sample Maximum limit is 104 CFU/100 mL and reported value was >4879 CFU/100 mL at R-G. |
Detailed reviews of sample integrity; sample handling; analytical processes and data quality were performed in the laboratory following the unusually high values specific to Enterococci samples of December 3, 2019 at three receiving water sites along the 30 foot contour. There were no discernible system or sample errors associated with these samples, however, this sampling date was associated with heavy winter storms in the Santa Cruz area. And although other indicator bacteria parameters were within compliance limits, each indicator was associated with unusual and often confluent bacteria growth. This is indicative of the contributions of other bacteria that may have been taken with the grab samples at these three stations. Because of the high concentrations of the background and non-indicator species, the lab has introduced a different sample dilution ratio for these samples for similar weather conditions in the future. |
Violation |
B |
eSMR |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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