| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1135052 |
09/04/2024 |
DMON |
NPDES Permit R5-2021-0003, Section VII.B.1, Table E-9, the quarterly chloride (mg/L) grab samples for receiving water monitoring wells MW-3, MW-4, MW-5, MW-9W, MW-11, and MW-AW were not collected for analysis 3rd quarter 2024. |
The staff is initiating more rigorous checks and balances, including a comprehensive sampling bottle check list and detailed quarterly checklist to ensure this oversight will be prevented in the future. |
Violation |
U |
eSMR |
| 1135053 |
09/04/2024 |
DMON |
NPDES Permit R5-2021-0003, Section VII.B.1, Table E-9, the quarterly chloride (mg/L) grab samples for receiving water monitoring wells MW-3, MW-4, MW-5, MW-9W, MW-11, and MW-AW were not collected for analysis. |
The staff is initiating more rigorous checks and balances, including a comprehensive sampling bottle check list and detailed quarterly checklist to ensure this oversight will be prevented in the future. |
Violation |
U |
eSMR |
| 1135054 |
09/04/2024 |
DMON |
NPDES Permit R5-2021-0003, Section VII.B.1, Table E-9, the quarterly chloride (mg/L) grab samples for receiving water monitoring wells MW-3, MW-4, MW-5, MW-9W, MW-11, and MW-AW were not collected for analysis. |
The staff is initiating more rigorous checks and balances, including a comprehensive sampling bottle check list and detailed quarterly checklist to ensure this oversight will be prevented in the future. |
Violation |
U |
eSMR |
| 1135055 |
09/04/2024 |
DMON |
NPDES Permit R5-2021-0003, Section VII.B.1, Table E-9, the quarterly chloride (mg/L) grab samples for receiving water monitoring wells MW-3, MW-4, MW-5, MW-9W, MW-11, and MW-AW were not collected for analysis. |
The staff is initiating more rigorous checks and balances, including a comprehensive sampling bottle check list and detailed quarterly checklist to ensure this oversight will be prevented in the future. |
Violation |
U |
eSMR |
| 1135056 |
09/04/2024 |
DMON |
NPDES Permit R5-2021-0003, Section VII.B.1, Table E-9, the quarterly chloride (mg/L) grab samples for receiving water monitoring wells MW-3, MW-4, MW-5, MW-9W, MW-11, and MW-AW were not collected for analysis. |
The staff is initiating more rigorous checks and balances, including a comprehensive sampling bottle check list and detailed quarterly checklist to ensure this oversight will be prevented in the future. |
Violation |
U |
eSMR |
| 1135057 |
09/04/2024 |
DMON |
NPDES Permit R5-2021-0003, Section VII.B.1, Table E-9, the quarterly chloride (mg/L) grab samples for receiving water monitoring wells MW-3, MW-4, MW-5, MW-9W, MW-11, and MW-AW were not collected for analysis. |
The staff is initiating more rigorous checks and balances, including a comprehensive sampling bottle check list and detailed quarterly checklist to ensure this oversight will be prevented in the future. |
Violation |
U |
eSMR |
| 1128086 |
04/30/2024 |
OEV |
Ammonium as Nitrogen Monthly Average (Mean) limit is 2.5 mg/L and reported value was 2.6 mg/L at EFF-001. |
It was found that the addition of glycerin was the problem. The tank had a build up of a chemical that inhibited the nitrification process thus allowing ammonia to pass through untreated. We have since cleaned the tank and implemented quarterly cleaning of both glycerin tanks. We also reseeded the south plant from the north plant to allow the biology to recover more quickly. As of 4/20/2024, the ammonia discharge from south aeration basins was less than 0.2 mg/L |
Violation |
U |
eSMR |
| 1128085 |
04/16/2024 |
OEV |
Ammonium as Nitrogen Weekly Average (Mean) limit is 4.2 mg/L and reported value was 5.5 mg/L at EFF-001. |
It was found that the addition of glycerin was the problem. The tank had a build up of a chemical that inhibited the nitrification process thus allowing ammonia to pass through untreated. We have since cleaned the tank and implemented quarterly cleaning of both glycerin tanks. We also reseeded the south plant from the north plant to allow the biology to recover more quickly. As of 4/20/2024, the ammonia discharge from south aeration basins was less than 0.2 mg/L |
Violation |
U |
eSMR |
| 1126506 |
03/28/2024 |
OEV |
Total Coliform Not to exceed a specific limit more than once within any 30-day period. limit is 23 MPN/100 mL and reported value was 46 MPN/100 mL at EFF-001. |
We had the manufacture Xylem out for service and the channel was inspected and no issues were found. We will be reaching out to them again for them to come onsite for another inspection. |
Violation |
U |
eSMR |
| 1126507 |
03/23/2024 |
OEV |
Total Coliform Not to exceed a specific limit more than once within any 30-day period. limit is 23 MPN/100 mL and reported value was 70 MPN/100 mL at EFF-001. |
After investigating the only explanation that we can find it had been raining and potentially could have washed the some bacteria into the channel either from the overhead crane or the UV deck. Verified with the laboratory that the samples were collected correctly and over the past year the operations group has increased cleaning in frequency and with the addition of pressure washing. Unfortunately this did not prevent this exceedance from occurring. |
Violation |
U |
eSMR |
| 1126505 |
03/03/2024 |
OEV |
Total Coliform Not to exceed a specific limit more than once within any 30-day period. limit is 23 MPN/100 mL and reported value was 170 MPN/100 mL at EFF-001. |
The possible factor that we found that could have contributed to the exceedance is that it was raining at the time of the sampling. The rain could have possibly washed contamination from birds contributing to the results. |
Violation |
U |
eSMR |
| 1126508 |
03/01/2024 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 540 MPN/100 mL at EFF-001. |
The possible factor that we found that could have contributed to the exceedance is that it was raining at the time of the sampling. The rain could have possibly washed contamination from birds contributing to the results. |
Violation |
U |
eSMR |
| 1123335 |
12/15/2023 |
DMON |
The turbidimeter was halted on December 14th at 0750 hours on and it was discovered and sampling was resumed on December 15th at 1519 hours. Halting the turbidimeter is part of the sampling process. The turbidimeter is halted to prevent a spike in turbidity during the process of flushing the sample line prior to a sampling even so that a representative sample can be taken. |
It was accidentally left halted until it was discovered the next day. Although this accident occurred we can show compliance by providing all of the filter turbidity data if requested. We are looking into creating an alarm within our SCADA to prevent this oversight from happening again. We are also creating an SOP for sampling and all of the Operation Staff will be attending a training. Please let me know how you would like us to proceed. |
Violation |
U |
eSMR |
| 1123334 |
12/14/2023 |
DMON |
The turbidimeter was halted on December 14th at 0750 hours on and it was discovered and sampling was resumed on December 15th at 1519 hours. Halting the turbidimeter is part of the sampling process. The turbidimeter is halted to prevent a spike in turbidity during the process of flushing the sample line prior to a sampling even so that a representative sample can be taken |
It was accidentally left halted until it was discovered the next day. Although this accident occurred we can show compliance by providing all of the filter turbidity data if requested. We are looking into creating an alarm within our SCADA to prevent this oversight from happening again. We are also creating an SOP for sampling and all of the Operation Staff will be attending a training. Please let me know how you would like us to proceed. |
Violation |
U |
eSMR |
| 1122932 |
11/29/2023 |
OEV |
Temperature Difference Between Sample and Upstream Daily Average (Mean) limit is 20.0 Degrees F and reported value was 21.0 Degrees F at EFF-001. |
According to NPDES permit order R5-2021-003 section IV.A.1.e EFF-001 discharge shall not exceed the natural receiving water temperature by more than 20 F. This exceedance will be addressed in the November eSMR |
Violation |
B |
eSMR |
| 1122207 |
10/24/2023 |
Order Conditions |
pH Single Sample Maximum limit is 9.0 SU and reported value was 9.4 SU at PND-001. |
The cause of the exceedance is believed to be caused by algae. The pond is in good health as demonstrated by high concentrations of dissolved oxygen. As requested we will be emptying the pond as soon as irrigation allows. |
Violation |
B |
eSMR |
| 1122206 |
10/17/2023 |
Order Conditions |
pH Single Sample Maximum limit is 9.0 SU and reported value was 9.2 SU at PND-001. |
The cause of the exceedance is believed to be caused by algae. The pond is in good health as demonstrated by high concentrations of dissolved oxygen. As requested we will be emptying the pond as soon as irrigation allows. |
Violation |
B |
eSMR |
| 1122205 |
10/10/2023 |
Order Conditions |
pH Single Sample Maximum limit is 9.0 SU and reported value was 9.9 SU at PND-001. |
The cause of the exceedance is believed to be caused by algae. The pond is in good health as demonstrated by high concentrations of dissolved oxygen. As requested we will be emptying the pond as soon as irrigation allows. |
Violation |
B |
eSMR |
| 1122204 |
10/03/2023 |
Order Conditions |
pH Single Sample Maximum limit is 9.0 SU and reported value was 9.8 SU at PND-001. |
The cause of the exceedance is believed to be caused by algae. The pond is in good health as demonstrated by high concentrations of dissolved oxygen. As requested we will be emptying the pond as soon as irrigation allows. |
Violation |
B |
eSMR |
| 1121397 |
09/26/2023 |
Order Conditions |
pH Single Sample Maximum limit is 9.0 SU and reported value was 9.9 SU at PND-001. |
The cause of the exceedance is believed to be caused by algae. The pond is in good health as demonstrated by high concentrations of dissolved oxygen. As requested we will be emptying the pond as soon as irrigation allows. |
Violation |
B |
eSMR |
| 1121396 |
09/19/2023 |
Order Conditions |
pH Single Sample Maximum limit is 9.0 SU and reported value was 10.2 SU at PND-001. |
The cause of the exceedance is believed to be caused by algae. The pond is in good health as demonstrated by high concentrations of dissolved oxygen. As requested we will be emptying the pond as soon as irrigation allows. |
Violation |
B |
eSMR |
| 1121395 |
09/05/2023 |
Order Conditions |
pH Single Sample Maximum limit is 9.0 SU and reported value was 10.1 SU at PND-001. |
The cause of the exceedance is believed to be caused by algae. The pond is in good health as demonstrated by high concentrations of dissolved oxygen. As requested we will be emptying the pond as soon as irrigation allows. |
Violation |
B |
eSMR |
| 1116989 |
04/28/2023 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 920 MPN/100 mL at EFF-001. |
After investigating the only explanation that we can find it was windy and the farmer was working the AG fields next to the UV structure. Over the past year the operations supervisor has increased cleaning in frequency and with the addition of pressure washing. Unfortunately this did not prevent this exceedance from occurring. |
Violation |
U |
eSMR |
| 1116988 |
04/14/2023 |
OEV |
Total Coliform Not to exceed a specific limit more than once within any 30-day period. limit is 23 MPN/100 mL and reported value was 33 MPN/100 mL at EFF-001. |
Section IV.A.1.iii with two coliform results within thirty days greater than 23mpn/100ml, addressed in coverletter |
Violation |
U |
eSMR |
| 1113890 |
01/31/2023 |
CAT1 |
Ammonia, Total (as N) Monthly Average limit is 2.5 mg/L and reported value was 3.7 mg/L at EFF-001. |
The exceedance was caused by cold weather, and increased wastewater flow due to rain events. The increase in cold water decreased the plants detention time and temperature which resulted in decreased capacity to fully nitrify ammonia. Prior to the storms we adjusted/optimized plant process to treat to the fullest extent possible |
Violation |
B |
eSMR |
| 1113889 |
01/31/2023 |
CAT1 |
Ammonia, Total (as N) Monthly Average limit is 200 lb/day and reported value was 281.1 lb/day at EFF-001. |
The exceedance was caused by cold weather, and increased wastewater flow due to rain events. The increase in cold water decreased the plants detention time and temperature which resulted in decreased capacity to fully nitrify ammonia. Prior to the storms we adjusted/optimized plant process to treat to the fullest extent possible |
Violation |
B |
eSMR |
| 1111471 |
11/16/2022 |
OEV |
Temperature Difference Between Sample and Upstream Daily Average (Mean) limit is 20 Degrees F and reported value was 21 Degrees F at EFF-001. |
According to NPDES permit order R5-2021-003 section IV.A.1.e EFF-001 discharge shall not exceed the natural receiving water temperature by more than 20 F. This exceedance will be addressed in the November eSMR |
Violation |
B |
eSMR |
| 1111472 |
11/02/2022 |
OEV |
Temperature Difference Between Sample and Upstream Daily Average (Mean) limit is 20 Degrees F and reported value was 21 Degrees F at EFF-001. |
According to NPDES permit order R5-2021-003 section IV.A.1.e EFF-001 discharge shall not exceed the natural receiving water temperature by more than 20 F. This exceedance will be addressed in the November eSMR |
Violation |
B |
eSMR |
| 1106652 |
06/16/2022 |
OEV |
Total Coliform Daily Maximum limit is 240.0 MPN/100 mL and reported value was 350.0 MPN/100 mL at EFF-001. |
The cause of the exceedance has not been determined at this time. We have investigated Turbidity, Dose, Transmittance and all are within normal ranges. We are currently inspecting the Tertiary filters for a tear. |
Violation |
B |
eSMR |
| 1086799 |
01/26/2021 |
OEV |
Temperature Daily Average (Mean) limit is 20 Degrees F and reported value was 21 Degrees F at EFF-001. |
The river monitoring was performed on a day where freezing temperatures occurred. WQCF is circulating tertiary filter effluent through unused floc tanks to chill the effluent prior to discharge but the extreme low temperatures on 1/26/21 exceeded our ability to sufficiently cool the effluent prior to discharge |
Violation |
B |
eSMR |
| 1092818 |
12/02/2020 |
OEV |
Temperature Daily Average (Mean) limit is 20 Degrees F and reported value was 21 Degrees F at EFF-001. |
|
Violation |
B |
Report |
| 1084107 |
11/08/2020 |
Order Conditions |
On November 8, 2020 the REC-001 total coliform was 46 MPN/100ml which was the second total coliform within 30 days to exceed 23 MPN/100ml as required in IV.C.4.i.ii. The first total coliform over 23 MPN/100ml was on October 20, 2020 which was 33 MPN/100ml. |
As a corrective action UV bulbs and the UV channel was cleaned and one whole bank of UV bulbs were replaced. |
Violation |
U |
eSMR |
| 1083256 |
11/08/2020 |
OEV |
Total Coliform Not to exceed a specific limit more than once within any 30-day period. limit is 23.0 MPN/100 mL and reported value was 46.0 MPN/100 mL at EFF-001. |
The first exceedence was caused by a tear in the tertiary filter media and was repaired. The cause of the second Total Coliform exceedence has yet to be determined. As a preventative measure the remaining 2 banks of UV bulbs are on schedule for bulb cleaning. |
Violation |
B |
eSMR |
| 1080874 |
09/03/2020 |
DMON |
Lnd-001 sample collected on 9-3-2020 @ 9:28am was not preserved and stored in the lab for total kjeldahl nitrogen. Due to this missed sample preservation and storage, total nitrogen cannot be calculated and report for Lnd-001 on 9-3-2020 |
The use of the sample checklist for sample collection and analysis has been re-emphasized in the laboratory so that future sample collection and analysis will not be missed |
Violation |
U |
eSMR |
| 1071492 |
02/12/2020 |
Order Conditions |
Board staff noted that temperature measurements since 1 January 2020 have not been maintained within the required temperature range, as recorded in the logbook inside the composite sampler. WDRs Standard Provision I.D requires the Discharger to properly operate and maintain all facilities and systems of treatment and control. Proper operation and maintenance also includes adequate laboratory controls and appropriate quality assurance procedures. Board staff assert that the Facility staff have not been properly trained and do not have adequate knowledge of sample preservation; therefore, the Discharger is in violation of Standard Provision I.D. |
|
Violation |
B |
Inspection |
| 1071491 |
02/12/2020 |
Order Conditions |
During the inspection, Board staff noted that the internal temperature of the influent composite sampler read 14.5°C. WDRs Standard Provision III.B requires the Discharger to conduct sampling in accordance with 40 CFR Part 136 which specifies sample preservation temperature of 4˚C + 2˚ for proper preservation. Since the influent composite sampler is not maintained within the required temperature range, it does not meet sample preservation requirements, in violation of Standard Provision III.B. |
|
Violation |
B |
Inspection |
| 1070243 |
12/05/2019 |
OEV |
pH Instantaneous Minimum limit is 6.5 SU and reported value was 6.4 SU at EFF-001. |
The pH adjusting system is ready to go and the chemical ordered. The chemical company has agreed to squeezed us into their Friday (12/6/2019) delivery route so hopefully WQCF will have chemical tomorrow. Once the system is active it may take part of a day to see a change as the dose is going through the plant to help the aeration basins as well as adjust the pH. |
Violation |
B |
eSMR |
| 1070244 |
12/04/2019 |
OEV |
pH Instantaneous Minimum limit is 6.5 SU and reported value was 6.4 SU at EFF-001. |
We are ordered chemical today (12/4/2019) and the system part should be installed by this afternoon. The Water division are going to continue to decrease surface water usage as they can. The decreases they made in surface water usage on November were unfortunately not as effective as hoped since there was a corresponding decrease in well water usage as the rainy season set in. |
Violation |
B |
eSMR |
| 1070245 |
12/03/2019 |
OEV |
pH Instantaneous Maximum limit is 6.5 SU and reported value was 6.3 SU at EFF-001. |
We received the parts necessary to initiate the pH adjusting caustic system and they should be installed and ready by tomorrow afternoon (12/4/2019). We are pushing through a purchase order to get the chemical here as soon as possible. |
Violation |
B |
eSMR |
| 1068529 |
11/28/2019 |
OEV |
pH Instantaneous Minimum limit is 6.5 SU and reported value was 6.4 SU at EFF-001. |
We have requested the Water Division lower the percentage of surface water used for drinking water which will hopefully bring up the alkalinity to assist in buffering the pH. Manteca is also looking into caustic addition to maintain pH compliance |
Violation |
B |
eSMR |
| 1068528 |
11/27/2019 |
OEV |
pH Instantaneous Minimum limit is 6.5 SU and reported value was 6.3 SU at EFF-001. |
We have requested the Water Division lower the percentage of surface water used for drinking water which will hopefully bring up the alkalinity to assist in buffering the pH. Manteca is also looking into caustic addition to maintain pH compliance. |
Violation |
B |
eSMR |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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