| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1140643 |
01/15/2025 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 0 mJ/cm2 at INT-002. *** MMP Exempt Reason:Discharge was directed to the recycled water system, not surface waters. |
Once the failed communications board and UV ballast were replaced the UV dose was restored. Plant effluent was under disinfected for one hour. The total amount of affected water was 1.08 million gallons.
Reclamation and Geysers operations staff were immediately informed of the event. Water discharged during the incident was either captured in City-owned ponds or conveyed into the Geysers recharge system pipeline. Additional notifications were provided to the Division of Drinking Water, the local health officer, and Calpine, on January 15, 2025.
|
Violation |
B |
eSMR |
| 1139507 |
12/30/2024 |
Order Conditions |
On December 30, 2024, while performing routing maintenance on UV channel 2, bank 2B, it was discovered that the bulb wiper system was not operating due to a misaligned hydraulic valve. The bank of bulbs was removed from the channel and the bulbs and wipers were manually cleaned and inspected. The wiper system was put in service and checked for proper operation. After further investigation it was determined that the wiper hydraulic system had been ineffective since November 12, 2024. |
Plant Operator responsibilities have been modified to include checking for proper hydraulic valve position once per shift. |
Violation |
B |
eSMR |
| 1139508 |
12/14/2024 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 0 mJ/cm2 at INT-002. *** MMP Exempt Reason:No discharge to surface waters |
Influent flow to the plant peaked at 88 million gallons per day. The total duration of the off-spec event was 9.9 hours. The average effluent flow was 58 million gallons per day. The estimated amount of affected water was 23.9 million gallons. The Treatment Plant Operations staff notified the Regional Water Quality Control Board, Reclamation and Geysers operations staff, and Calpine as soon as we became aware of the exceedance. Recycled water discharged during the incident was either captured in City owned ponds for retreatment or conveyed into the Geysers recharge system pipeline. |
Violation |
B |
eSMR |
| 1137891 |
11/24/2024 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 69.9 mJ/cm2 at INT-002. *** MMP Exempt Reason:No discharge to surface waters |
Reclamation and Geysers operations staff, along with Calpine, were immediately informed of the event. Recycled water discharged during the incident was either captured in City owned ponds for retreatment or conveyed into the Geysers recharge system pipeline. |
Violation |
B |
eSMR |
| 1137894 |
11/23/2024 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 61.2 mJ/cm2 at INT-002. *** MMP Exempt Reason:No discharge to surface waters |
Reclamation and Geysers operations staff, along with Calpine, were immediately informed of the event. Recycled water discharged during the incident was either captured in City owned ponds for retreatment or conveyed into the Geysers recharge system pipeline. |
Violation |
B |
eSMR |
| 1137893 |
11/22/2024 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 60.6 mJ/cm2 at INT-002. *** MMP Exempt Reason:No discharge to surface waters |
Reclamation and Geysers operations staff, along with Calpine, were immediately informed of the event. Recycled water discharged during the incident was either captured in City owned ponds for retreatment or conveyed into the Geysers recharge system pipeline. |
Violation |
B |
eSMR |
| 1137892 |
11/21/2024 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 82.2 mJ/cm2 at INT-002. *** MMP Exempt Reason:No discharge to surface waters |
Reclamation and Geysers operations staff, along with Calpine, were immediately informed of the event. Recycled water discharged during the incident was either captured in City owned ponds for retreatment or conveyed into the Geysers recharge system pipeline. |
Violation |
B |
eSMR |
| 1137890 |
11/16/2024 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 95.1 mJ/cm2 at INT-002. *** MMP Exempt Reason:No discharge to surface waters |
Reclamation and Geysers operations staff, along with Calpine, were immediately informed of the event. Recycled water discharged during the incident was either captured in City owned ponds for retreatment or conveyed into the Geysers recharge system pipeline. |
Violation |
B |
eSMR |
| 1137889 |
11/14/2024 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 0 mJ/cm2 at INT-002. *** MMP Exempt Reason:No discharge to surface waters |
Reclamation and Geysers operations staff, along with Calpine, were immediately informed of the event. Recycled water discharged during the incident was either captured in City owned ponds for retreatment or conveyed into the Geysers recharge system pipeline. |
Violation |
B |
eSMR |
| 1136782 |
10/23/2024 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 82.6 mJ/cm2 at INT-002. *** MMP Exempt Reason:No discharge to surface waters |
Staff is still investigating the programming error.
All flow was captured in off-site ponds for re-treatment or conveyed to the Geysers Project Distribution System. |
Violation |
B |
eSMR |
| 1136781 |
10/09/2024 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 68.1 mJ/cm2 at INT-002. *** MMP Exempt Reason:No discharge to surface waters |
The error in the programming logic has been identified and corrected.
All flow was captured in off-site ponds for re-treatment or conveyed to the Geysers Project Distribution System. |
Violation |
B |
eSMR |
| 1130094 |
06/17/2024 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 80 mJ/cm2 at INT-002. *** MMP Exempt Reason:Not a discharge to surface waters. |
The UV system alarm program has 0.0 second delay for the Low Low Dose Delivered alarm. However no alarm was annunciated during the 3 second low dose event and this particular event went unnoticed until compiling data for the monthly report. Staff have confirmed the correct programming and are further troubleshooting the alarm. |
Violation |
B |
eSMR |
| 1124610 |
01/22/2024 |
CAT1 |
UV Dose Daily Minimum limit is 100 mJ/cm2 and reported value was 83.1 mJ/cm2 at INT-002. *** MMP Exempt Reason:No discharge to surface waters. |
The downstream reclamation system diversion mode was activated in order to divert flow to Brown Pond in response to the event. The actual dose during this diversion was maintained above 100 mJ/cm2 if the treatment supplied by redundant banks was allowed to be included.
On January 22, 2024 at 01:14 the calculated UV dose surpassed the 100 mJ/cm2 minimum dose threshold. Plant effluent then began meeting all permit limits and the diversion was stopped. The average plant flow during the diversion was 38.5 mgd. The duration of the diversion was 88 minutes. The amount of affected flow was approximately 2.35 million gallons. There were no recycled water deliveries to irrigation customers during the event and Calpine was immediately notified of the offspec water by Reclamation Staff.
|
Violation |
B |
eSMR |
| 1124611 |
01/21/2024 |
CAT1 |
UV Dose Daily Minimum limit is 100 mJ/cm2 and reported value was 84.1 mJ/cm2 at INT-002. *** MMP Exempt Reason:No discharge to surface waters. |
For the first event - at 20:58 a UV Channel 1 low dose alarm activated, and the LTP SCADA system immediately diverted the effluent flow to an offline pond. The electrician corrected the electrical problem with the UV system. The plant remained in diversion mode until January 21, 2024, at 23:25 hours. The duration of the diversion was 177 minutes. The average plant flow during the diversion was 47.66 million gallons per day (mgd), and the total effluent flow affected was 5.86 million gallons. The lowest calculated UV dose during the diversion was 99 mJ/cm2. There were no recycled water deliveries to irrigation customers during the event and Calpine was immediately notified of the off-spec water by Reclamation Staff.
For the second event - the downstream reclamation system diversion mode was activated in order to divert flow to Brown Pond in response to the event. The actual dose during this diversion was maintained above 100 mJ/cm2 if the treatment supplied by redundant banks was allowed to be included.
On January 22, 2024 at 01:14 the calculated UV dose surpassed the 100 mJ/cm2 minimum dose threshold. Plant effluent then began meeting all permit limits and the diversion was stopped. The average plant flow during the diversion was 38.5 mgd. The duration of the diversion was 88 minutes. The amount of affected flow was approximately 2.35 million gallons. There were no recycled water deliveries to irrigation customers during the event and Calpine was immediately notified of the offspec water by Reclamation Staff.
|
Violation |
B |
eSMR |
| 1124609 |
01/15/2024 |
DMON |
The UV channel 3 Total Coliform sample for January 15, 2024 was invalidated due to an analytical error in the laboratory. |
Staff was counseled and the issue has been resolved. |
Violation |
B |
eSMR |
| 1124608 |
01/13/2024 |
CAT1 |
UV Transmittance Daily Minimum limit is 50 % and reported value was 49.4 % at INT-002. *** MMP Exempt Reason:No discharge to surface waters. |
The cause of the low UVT was excessive landfill leachate loading in the plant influent. Analysis of leachate input to LTP indicated that leachate deliveries from the landfill exceeded the expected number of trucks per hour. The landfill was trying to empty their leachate holding ponds in advance of the coming storms and brought too much at one time driving down the UVT. Santa Rosa Water Environmental Compliance staff are currently working with the Central Landfill staff to limit the rate of leachate delivery so that even if their leachate ponds are in alarm and at risk of overtopping, the treatment plant cannot take more than the agreed upon amount rate. |
Violation |
B |
eSMR |
| 1122925 |
11/11/2023 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 96.9 mJ/cm2 at INT-002. *** MMP Exempt Reason:No discharge to surface water. |
The cause of the event is unknown. In the past, leachate from the Mecham Road Central Landfill has been identified as a source of wastewater exhibiting low UVT. Santa Rosa Water staff inquired with Central Landfill staff after the event and determined that the leachate pipeline normally used to convey leachate to LTP was offline for repair. Review of the trucked waste logs for the period leading up to the event and during the period of low UVT showed that the amount of leachate delivered through the trucked waste program was not excessive compared to similar weeks before and after the UVT event. Santa Rosa Water Environmental Compliance staff checked with Industrial Users and could not identify any abnormal conditions around the time of the event. There were no recycled water deliveries to irrigation customers during the event and Calpine was immediately notified of the off-spec water by Reclamation Staff. |
Violation |
B |
eSMR |
| 1122927 |
11/11/2023 |
CAT1 |
UV Transmittance Instantaneous Minimum limit is 50 % and reported value was 48.3 % at INT-002. *** MMP Exempt Reason:No discharge to surface water. |
The cause of the low UVT is unknown. In the past, leachate from the Mecham Road Central Landfill has been identified as a source of wastewater exhibiting low UVT. Santa Rosa Water staff inquired with Central Landfill staff after the event and determined that the leachate pipeline normally used to convey leachate to LTP was offline for repair. Review of the trucked waste logs for the period leading up to the event and during the period of low UVT showed that the amount of leachate delivered through the trucked waste program was not excessive compared to similar weeks before and after the UVT event. Santa Rosa Water Environmental Compliance staff checked with Industrial Users and could not identify any abnormal conditions around the time of the event. There were no recycled water deliveries to irrigation customers during the event and Calpine was immediately notified of the off-spec water by Reclamation Staff. |
Violation |
B |
eSMR |
| 1122926 |
11/10/2023 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 49.2 mJ/cm2 at INT-002. *** MMP Exempt Reason:No discharge to surface water. |
The cause of the event is unknown. In the past, leachate from the Mecham Road Central Landfill has been identified as a source of wastewater exhibiting low UVT. Santa Rosa Water staff inquired with Central Landfill staff after the event and determined that the leachate pipeline normally used to convey leachate to LTP was offline for repair. Review of the trucked waste logs for the period leading up to the event and during the period of low UVT showed that the amount of leachate delivered through the trucked waste program was not excessive compared to similar weeks before and after the UVT event. Santa Rosa Water Environmental Compliance staff checked with Industrial Users and could not identify any abnormal conditions around the time of the event. There were no recycled water deliveries to irrigation customers during the event and Calpine was immediately notified of the off-spec water by Reclamation Staff. |
Violation |
B |
eSMR |
| 1122929 |
11/10/2023 |
CAT1 |
UV Transmittance Instantaneous Minimum limit is 50 % and reported value was 30.6 % at INT-002. *** MMP Exempt Reason:No discharge to surface water. |
The cause of the low UVT is unknown. In the past, leachate from the Mecham Road Central Landfill has been identified as a source of wastewater exhibiting low UVT. Santa Rosa Water staff inquired with Central Landfill staff after the event and determined that the leachate pipeline normally used to convey leachate to LTP was offline for repair. Review of the trucked waste logs for the period leading up to the event and during the period of low UVT showed that the amount of leachate delivered through the trucked waste program was not excessive compared to similar weeks before and after the UVT event. Santa Rosa Water Environmental Compliance staff checked with Industrial Users and could not identify any abnormal conditions around the time of the event. There were no recycled water deliveries to irrigation customers during the event and Calpine was immediately notified of the off-spec water by Reclamation Staff. |
Violation |
B |
eSMR |
| 1122930 |
11/09/2023 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 47.7 mJ/cm2 at INT-002. *** MMP Exempt Reason:No discharge to surface water. |
The cause of the event is unknown. In the past, leachate from the Mecham Road Central Landfill has been identified as a source of wastewater exhibiting low UVT. Santa Rosa Water staff inquired with Central Landfill staff after the event and determined that the leachate pipeline normally used to convey leachate to LTP was offline for repair. Review of the trucked waste logs for the period leading up to the event and during the period of low UVT showed that the amount of leachate delivered through the trucked waste program was not excessive compared to similar weeks before and after the UVT event. Santa Rosa Water Environmental Compliance staff checked with Industrial Users and could not identify any abnormal conditions around the time of the event. There were no recycled water deliveries to irrigation customers during the event and Calpine was immediately notified of the off-spec water by Reclamation Staff.
|
Violation |
B |
eSMR |
| 1122928 |
11/09/2023 |
CAT1 |
UV Transmittance Instantaneous Minimum limit is 50 % and reported value was 30.6 % at INT-002. *** MMP Exempt Reason:No discharge to surface water. |
The cause of the low UVT is unknown. In the past, leachate from the Mecham Road Central Landfill has been identified as a source of wastewater exhibiting low UVT. Santa Rosa Water staff inquired with Central Landfill staff after the event and determined that the leachate pipeline normally used to convey leachate to LTP was offline for repair. Review of the trucked waste logs for the period leading up to the event and during the period of low UVT showed that the amount of leachate delivered through the trucked waste program was not excessive compared to similar weeks before and after the UVT event. Santa Rosa Water Environmental Compliance staff checked with Industrial Users and could not identify any abnormal conditions around the time of the event. There were no recycled water deliveries to irrigation customers during the event and Calpine was immediately notified of the off-spec water by Reclamation Staff. |
Violation |
B |
eSMR |
| 1118822 |
06/15/2023 |
DMON |
The Total Coliform samples for June 15, 2023 were invalidated due to an equipment failure in the laboratory where the disposable vials were reused and subsequently cracked during the analysis. As a result, no coliform values were reported for that day. |
As a corrective action the City is no longer reusing disposable vials. |
Violation |
B |
eSMR |
| 1117508 |
04/05/2023 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 93.8 mJ/cm2 at INT-002. |
A review of the UV program found a hard programmed alarm delay of 5 seconds for the Low Low Dose Delivered alarm which points to the reason why LTP operations staff were unaware of the event. The programming has been altered and the delay has been changed to 0 seconds so staff will be made aware of any Low Low Dose events regardless of the duration. Furthermore, a metric to display the lowest dose of the day will be added to the daily report so management can be made aware of potential low dose situations sooner. |
Violation |
B |
eSMR |
| 1108825 |
08/04/2022 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 23 mJ/cm2 at INT-002. |
The City will install an additional UPS and power supply for the UV PLC so that in the event one fails, the other will continue providing power. Additionally, procedures will be put in place so that when the UV PLC is worked on, the controls to the UV channel influent gates will be turned off to prevent unanticipated operation of the system. Senior Operations staff will also receive refresher training on investigating off-spec events so that support staff are notified in a timely manner of any off-spec condition. |
Violation |
B |
eSMR |
| 1107578 |
07/13/2022 |
Order Conditions |
UV Dose Daily Minimum limit is 100 mJ/cm2 and reported value was 0 mJ/cm2 at INT-002. |
The Operators involved were counselled on their error and the Standard Operating Procedure (SOP) for shutting down the UV system was updated. This procedure was reviewed by the Wastewater Treatment Superintendent and has been added to the City's SOP Library and distributed to Operations staff for training. |
Violation |
B |
eSMR |
| 1107579 |
07/07/2022 |
DMON |
The Total Coliform sample for UV Channel 2 was invalidated due to the analyst failing to properly set-up the test when performing the analysis. |
As a result, staff received counseling regarding the error. |
Violation |
B |
eSMR |
| 1104442 |
04/01/2022 |
DMON |
Total Coliform sample for UV Channel 1 was invalidated due to the analyst failing to properly set-up the test when performing the analysis. |
Staff was counseled regarding the error. |
Violation |
B |
eSMR |
| 1098183 |
11/08/2021 |
DMON |
The Total Coliform sample for UV Channel 1, sampled on November 8, 2021, was invalidated due to the analyst using expired media when performing the analysis. |
Staff received counseling regarding the error and the City modified the bench sheet to include spaces for lot number and expiration date of media used for the analysis. |
Violation |
B |
eSMR |
| 1097308 |
10/28/2021 |
CAT1 |
UV Transmittance Instantaneous Minimum limit is 50 % and reported value was 48 % at INT-002. *** MMP Exempt Reason:No discharge to surface water at this time. |
The root cause of the incident was due to the high amount of rainfall brought by the October 24th category 5 atmospheric river that culminated in approximately 10 inches of rain. Throughout and due to the storm event, trucked waste haulers were bringing increased amounts of leachate from landfills and composting facilities to the plant. To proactively prevent the trucked leachate from negatively impacting UVT values, the leachate was stored in the emergency holding basin (EHB) for later treatment. Plant staff accommodated waste haulers throughout the storm event but ultimately had to temporarily cease deliveries as the system continued exceeding capacity. The combined efforts of storing trucked leachate and ceasing hauling allowed the plant to return to on-spec operations following the off-spec event that occurred October 24th through 26th, 2021. Once the plant returned to stable, on-spec operations following the storm event, operators began feeding the stored leachate into the headworks and again began accommodating trucked leachate haulers. The amount of leachate needing to be returned from the EHB following the storm event in combination with the trucked deliveries ultimately caused a dramatic reduction in UVT and the subsequent off-spec event. |
Violation |
B |
eSMR |
| 1097313 |
10/26/2021 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 75.1 mJ/cm2 at INT-002. *** MMP Exempt Reason:No discharge to surface water at this time. |
Staff responded by manually diverting primary effluent to the flow equalization basins. Mechanical Services on-call staff responded to the failure. However, by the time the primary effluent channel control valve was manually opened, much of the flow equalization basin storage had already been used. At approximately 1500 hours, the usable storage space in the flow equalization basins had been utilized and the plant began taking all influent flow.
The off-spec water was either captured in City-owned recycled water storage ponds or conveyed into the Geysers recharge system pipeline. Verbal and email notification were provided to the Geysers informing their operation of the off-spec water delivery and estimated time when it would reach terminal reservoir. |
Violation |
B |
eSMR |
| 1097314 |
10/25/2021 |
OEV |
Flow Daily Maximum limit is 66.9 MGD and reported value was 68.7 MGD at EFF-001. *** MMP Exempt Reason:No discharge to surface water at this time. |
Staff responded by manually diverting primary effluent to the flow equalization basins. However, by the time the primary effluent channel control valve was manually opened, much of the flow equalization basin storage had already been used. At approximately 1500 hours, the usable storage space in the flow equalization basins had been utilized and the plant began taking all influent flow. |
Violation |
B |
eSMR |
| 1097312 |
10/25/2021 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 41.6 mJ/cm2 at INT-002. *** MMP Exempt Reason:No discharge to surface water at this time. |
Staff responded by manually diverting primary effluent to the flow equalization basins. Mechanical Services on-call staff responded to the failure. However, by the time the primary effluent channel control valve was manually opened, much of the flow equalization basin storage had already been used. At approximately 1500 hours, the usable storage space in the flow equalization basins had been utilized and the plant began taking all influent flow.
The off-spec water was either captured in City-owned recycled water storage ponds or conveyed into the Geysers recharge system pipeline. Verbal and email notification were provided to the Geysers informing their operation of the off-spec water delivery and estimated time when it would reach terminal reservoir. |
Violation |
B |
eSMR |
| 1097309 |
10/25/2021 |
CAT1 |
UV Transmittance Instantaneous Minimum limit is 50 % and reported value was 48.4 % at INT-002. *** MMP Exempt Reason:No discharge to surface water at this time. |
Staff responded by manually diverting primary effluent to the flow equalization basins. Mechanical Services on-call staff responded to the failure. However, by the time the primary effluent channel control valve was manually opened, much of the flow equalization basin storage had already been used. At approximately 1500 hours, the usable storage space in the flow equalization basins had been utilized and the plant began taking all influent flow.
The off-spec water was either captured in City-owned recycled water storage ponds or conveyed into the Geysers recharge system pipeline. Verbal and email notification were provided to the Geysers informing their operation of the off-spec water delivery and estimated time when it would reach terminal reservoir. |
Violation |
B |
eSMR |
| 1097310 |
10/24/2021 |
OEV |
Flow Daily Maximum limit is 66.9 MGD and reported value was 71.2 MGD at EFF-001. |
Staff responded by manually diverting primary effluent to the flow equalization basins. Mechanical Services on-call staff responded to the failure. However, by the time the primary effluent channel control valve was manually opened, much of the flow equalization basin storage had already been used. At approximately 1500 hours, the usable storage space in the flow equalization basins had been utilized and the plant began taking all influent flow. |
Violation |
B |
eSMR |
| 1097311 |
10/24/2021 |
CAT1 |
UV Dose Instantaneous Minimum limit is 100 mJ/cm2 and reported value was 37.3 mJ/cm2 at INT-002. |
Staff responded by manually diverting primary effluent to the flow equalization basins. Mechanical Services on-call staff responded to the failure. However, by the time the primary effluent channel control valve was manually opened, much of the flow equalization basin storage had already been used. At approximately 1500 hours, the usable storage space in the flow equalization basins had been utilized and the plant began taking all influent flow.
The off-spec water was either captured in City-owned recycled water storage ponds or conveyed into the Geysers recharge system pipeline. Verbal and email notification were provided to the Geysers informing their operation of the off-spec water delivery and estimated time when it would reach terminal reservoir. |
Violation |
B |
eSMR |
| 1097315 |
10/24/2021 |
CAT1 |
UV Transmittance Instantaneous Minimum limit is 50 % and reported value was 48 % at INT-002. |
Staff responded by manually diverting primary effluent to the flow equalization basins. Mechanical Services on-call staff responded to the failure. However, by the time the primary effluent channel control valve was manually opened, much of the flow equalization basin storage had already been used. At approximately 1500 hours, the usable storage space in the flow equalization basins had been utilized and the plant began taking all influent flow.
Throughout and due to the storm event, trucked waste haulers were bringing increased amounts of leachate from landfills and composting facilities to the plant. To proactively prevent the trucked leachate from negatively impacting UVT values, the leachate was stored in the emergency holding basin (EHB) for later treatment. Plant staff accommodated waste haulers throughout the storm event but ultimately had to temporarily cease deliveries as the system continued exceeding capacity. |
Violation |
B |
eSMR |
| 1093631 |
07/29/2021 |
DMON |
The pH meter used for the final effluent (EFF-001) grab on July 29, 2021 was calibrated using a second source pH 7 buffer from the same lot number as the original source pH 7 buffer. As this is not in line with requirements found in Standard Methods, the sample for that day has been invalidated |
The lab the lab will use pH 8 buffer as a second source check standard instead of a pH 7 buffer. |
Violation |
B |
eSMR |
| 1092485 |
06/29/2021 |
DMON |
On June 29, 2021 at 1349 hrs. the filter effluent turbidity meter went offline. Staff became aware that the meter was offline at 2000 hrs. and immediately began hourly reads using a bench top turbidity meter. |
Upon further investigation of the incident, staff discovered that a light bulb failure in the meter caused the instrument to go down. The light bulb was replaced, and the turbidity meter was placed back into service at 0728 hrs. on June 30, 2021. The turbidity before and after the off-line period was 0.7 NTU and there is no indication that there was a turbidity violation during the event. The Treatment Plant Operator on shift was counseled on checking trends twice per shift, as required in the Operators¿ work plans. |
Violation |
B |
eSMR |
| 1091446 |
05/18/2021 |
DMON |
There was only one reportable Biochemical Oxygen Demand results for treatment plant final effluent for the week of May 16-22 because of analytical quality control failure. |
As a result of the QC failure the City of Santa Rosa began subcontracting BOD samples to an outside laboratory allowing staff to investigate the cause of the failed QC without risking further analytical results. While the investigation is still ongoing, QC issues have been resolved and it is likely they were a result of poor-quality BOD dilution water. City staff is working with the deionized water system vendor to provide a maintenance frequency that will help eliminate future BOD QC issues. |
Violation |
B |
eSMR |
| 1091445 |
05/18/2021 |
DMON |
There was only one reportable Biochemical Oxygen Demand results for treatment plant influent for the week of May 16-22 because of analytical quality control failure. |
As a result of the QC failure the City of Santa Rosa began subcontracting BOD samples to an outside laboratory allowing staff to investigate the cause of the failed QC without risking further analytical results. While the investigation is still ongoing, QC issues have been resolved and it is likely they were a result of poor-quality BOD dilution water. City staff is working with the deionized water system vendor to provide a maintenance frequency that will help eliminate future BOD QC issues. |
Violation |
B |
eSMR |
| 1082170 |
10/15/2020 |
DMON |
The filter effluent turbidity meter was placed in the hold position for calibration purposes. Difficulties with the calibration process caused the on-line monitoring of the filter effluent to be paused for 1 hour and 47 minutes, from 1456 hours to 1643 hours. This exceeded the permitted monitoring requirement to record the filter effluent turbidity levels at intervals of no less than once every 1 hour and 12 minutes over a 24-hour period |
Prior to the meter being placed on hold the effluent turbidity was averaging 0.64 NTU and after the meter was placed back on-line the effluent turbidity averaged 0.72 NTU. The operator involved received counseling on this matter.
|
Violation |
B |
eSMR |
| 1076256 |
05/31/2020 |
DMON |
There is no reportable Chloride result for May 2020 due to a laboratory analyst error in missing the regulatory hold time during a period of reduced staffing levels related to Covid-19. |
The laboratory staff has received refresher training on the necessity of performing a daily review of all samples submitted to the laboratory in an effort to prevent this error from recurring. |
Violation |
U |
eSMR |
| 1076257 |
05/17/2020 |
DMON |
There is only one reportable Biochemical Oxygen Demand (BOD5) result for the week of May 17, 2020 due to a potentially inactive glucose-glutamic acid standard (GGA) for the BOD5 test. Per Table E-4 of the NPDES permit, two BOD5 results per calendar week are required. |
Upon discovery of two consecutive GGA failures, the laboratory immediately ordered a new lot of standard and was back in compliance with the NPDES permit the following calendar week. |
Violation |
U |
eSMR |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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