Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
1134337 |
09/30/2024 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 39 mg/L at M-003. |
Staff continue to struggle with exceedances of nitrate in the effluent. The plant is well designed and operated at nitrifying, but has no means to denitrify. This often results in excessive nitrate levels in the effluent, as shown during each month of this quarter.
Fortunately, the City continues working with consultant engineers on a treatment plant upgrade, which will add denitrification. Until then, nitrate exceedances will remain a constant threat.
|
Violation |
U |
eSMR |
1134340 |
09/30/2024 |
CAT1 |
Settleable Solids Monthly Average limit is 0.1 ml/L and reported value was 0.125 ml/L at M-003. |
After the 0.2 result staff cleaned contact basins and secondary weirs |
Violation |
U |
eSMR |
1134335 |
09/30/2024 |
CAT2 |
Dichlorobromomethane Monthly Average limit is 0.56 ug/L and reported value was 0.84 ug/L at M-003. |
upon investigation staff discovered the ratio of cl2 to nh3 was out of range for Chloramination staff adjusted chemicals to bring the plant back into Chloramination. |
Violation |
U |
eSMR |
1134338 |
08/31/2024 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 37 mg/L at M-003. |
Staff continue to struggle with exceedances of nitrate in the effluent. The plant is well designed and operated at nitrifying, but has no means to denitrify. This often results in excessive nitrate levels in the effluent, as shown during each month of this quarter.
Fortunately, the City continues working with consultant engineers on a treatment plant upgrade, which will add denitrification. Until then, nitrate exceedances will remain a constant threat.
|
Violation |
U |
eSMR |
1134336 |
08/13/2024 |
CAT2 |
Dichlorobromomethane Monthly Average limit is 00.56 ug/L and reported value was 00.87 ug/L at M-003. |
staff adjusted nh3 to cl2 ratio |
Violation |
U |
eSMR |
1134339 |
07/31/2024 |
CAT1 |
Settleable Solids Monthly Average (Mean) limit is 0.1 ml/L and reported value was 00.13 ml/L at M-003. |
after the 0.2 staff cleaned contact basins and secondary cliarifer wier |
Violation |
U |
eSMR |
1129538 |
06/30/2024 |
CAT1 |
Settleable Solids Monthly Average (Mean) limit is 0.1 mg/L and reported value was 0.15 mg/L at M-003. |
as stated for the 06/24/24 violation staff adjusted operations to bring plant into compliance |
Violation |
B |
eSMR |
1129539 |
06/24/2024 |
CAT1 |
Settleable Solids Maximum Daily (MDEL) limit is 0.2 mg/L and reported value was 0.3 mg/L at M-003. |
staff adjusted mixed liquor to improve settling and cleaned contact basins and clairifier |
Violation |
B |
eSMR |
1125041 |
03/02/2024 |
LREP |
Annual SMR ( MONNPDES ) report for 2023 (2673454) was due on 01-MAR-24 |
|
Violation |
B |
Report |
1123391 |
11/14/2023 |
OEV |
Total Coliform Maximum Daily (MDEL) limit is 230 MPN/100 mL and reported value was 350 MPN/100 mL at M-003. |
staff adjusted disinfection |
Violation |
B |
eSMR |
1123390 |
10/10/2023 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 032 mg/L and reported value was 033 mg/L at M-003. |
the city continues working with consultant engineers on a treatment plant upgrade, which will include denitrification. |
Violation |
B |
eSMR |
1120974 |
09/12/2023 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 38 mg/L at M-003. |
The City of Fortuna is working on upgrading its WWTP to better remove nitrate in the effluent. |
Violation |
B |
eSMR |
1120975 |
08/31/2023 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 44 mg/L at M-003. |
The City of Fortuna is working on upgrading its WWTP to better remove nitrate in the effluent. |
Violation |
B |
eSMR |
1120977 |
07/31/2023 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 43 mg/L at M-003. |
The City of Fortuna is working on upgrading its WWTP to better remove nitrate in the effluent. |
Violation |
B |
eSMR |
1120973 |
07/31/2023 |
CAT1 |
Settleable Solids Monthly Average limit is 0.1 ml/L and reported value was 0.2 ml/L at M-003. |
Adjusted aeration rates in the MLSS to fine-tune biological nitrification-denitrification. |
Violation |
B |
eSMR |
1120976 |
07/10/2023 |
CAT1 |
Settleable Solids Daily Maximum limit is 0.2 ml/L and reported value was 0.4 ml/L at M-003. |
Adjusted aeration rates in the MLSS to fine-tune biological nitrification-denitrification. |
Violation |
B |
eSMR |
1118688 |
06/30/2023 |
CAT1 |
Settleable Solids Monthly Average limit is 0.1 ml/L and reported value was 0.225 ml/L at M-003. |
Staff altered solids-wasting schedules and fine-tuned the plant solids-balance to enhance proper settling in the secondary clarifiers. Staff also manipulated the number of secondary clarifiers in operation. |
Violation |
B |
eSMR |
1118687 |
06/06/2023 |
CAT1 |
Settleable Solids Maximum Daily (MDEL) limit is 0.2 ml/L and reported value was 0.5 ml/L at M-003. |
Staff continued operations to correct the plant solids balance and enhance treatment conditions to enable better settling in the secondary clarifiers. |
Violation |
B |
eSMR |
1118686 |
05/30/2023 |
CAT1 |
Settleable Solids Daily Maximum limit is 0.2 ml/L and reported value was 0.5 ml/L at M-003. |
Plant staff added a second secondary clarifier online and decreased sludge-wasting. This allowed for increased settling prior to the chlorine contact chambers. The reduction of sludge-wasting allowed for solids build-up and recuperation in the MLSS. |
Violation |
B |
eSMR |
1112480 |
11/29/2022 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 37 mg/L at M-003. |
Excessive nitrate levels will remain a constant threat in the effluent until the City upgrades the treatment plant to add denitrification infrastructure. |
Violation |
B |
eSMR |
1109356 |
07/11/2022 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 33 mg/L at M-003. |
Excessive nitrate levels will remain a constant threat until the City upgrades the treatment plant to add denitrification. |
Violation |
B |
eSMR |
1106085 |
06/16/2022 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 35 mg/L at M-003. |
The plant is in the design phase of upgrading its treatment process for denitrification. This will result in the future removal of nitrate in the effluent. |
Violation |
B |
eSMR |
1106086 |
05/31/2022 |
OEV |
Total Coliform 30-Day Median limit is 23 MPN/100 mL and reported value was 49 MPN/100 mL at M-003. |
Staff increased the chlorine dosage feed-rate to improve disinfection. |
Violation |
B |
eSMR |
1106084 |
05/19/2022 |
CAT2 |
Dichlorobromomethane Monthly Average limit is 0.56 ug/L and reported value was 0.92 ug/L at M-003. |
Staff will continue to closely monitor chemical feed-rates and treatment efficiency to inhibit the formation of disinfection byproducts in the effluent. |
Violation |
B |
eSMR |
1102927 |
03/03/2022 |
DMON |
Due to an over-depletion of DO in the lab dilution water, City lab staff invalidated the effluent BOD result for the first week of March. |
City lab staff corrected the issue with the lab dilution water. |
Violation |
B |
eSMR |
1102926 |
03/03/2022 |
DMON |
Due to an over-depletion of DO in the lab dilution water, City lab staff invalidated the influent BOD result for the first week of March. |
City lab staff corrected the issue with the lab dilution water. |
Violation |
B |
eSMR |
1095607 |
07/13/2021 |
CAT1 |
Ammonia, Total (as N) Monthly Average limit is 9.4 mg/L and reported value was 9.7 mg/L at M-003. |
The City of Fortuna is upgrading its WWTP to better control treatment for nutrient removal, such as ammonia. This will occur in the next few years. |
Violation |
B |
eSMR |
1092053 |
04/30/2021 |
OEV |
Total Coliform Monthly Median limit is 23 MPN/100 mL and reported value was 214.5 MPN/100 mL at M-001. |
Staff will adjust chemical feed to meet any possible effects of future plant process changes. |
Violation |
B |
eSMR |
1092052 |
04/26/2021 |
OEV |
Total Coliform Single Sample Maximum limit is 240 MPN/100 mL and reported value was 350 MPN/100 mL at M-001. |
Staff will adjust chemical feed to meet any possible effects of future plant process changes. |
Violation |
B |
eSMR |
1092051 |
04/20/2021 |
OEV |
Total Coliform Single Sample Maximum limit is 240 MPN/100 mL and reported value was 350 MPN/100 mL at M-001. |
Staff will adjust chemical feed to meet any possible effects of future plant process changes. |
Violation |
B |
eSMR |
1092054 |
04/13/2021 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 37 mg/L at M-001. |
The plant is under a Time Schedule Order to upgrade its ability to remove ammonia and nitrate. This will occur before the end of 2024. |
Violation |
B |
eSMR |
1088517 |
02/19/2021 |
CAT2 |
Chlorine, Total Residual Maximum Daily (MDEL) limit is 0.02 mg/L and reported value was 0.03 mg/L at M-001. |
Staff changed out the SO2 ton tank as soon as their shift began. In the future, a preemptive SO2 ton tank changeout will occur before it can empty after hours and switch over to the 150# cylinders under such high flow conditions. |
Violation |
B |
eSMR |
1083797 |
12/08/2020 |
OEV |
Total Coliform Maximum Daily (MDEL) limit is 240 MPN/100 mL and reported value was 350 MPN/100 mL at M-003. |
Staff increased chlorine feed until they resolved the turbid effluent situation that caused the high coliform count. |
Violation |
B |
eSMR |
1083796 |
10/13/2020 |
CAT1 |
Ammonia, Total (as N) Monthly Average limit is 9.4 mg/L and reported value was 19 mg/L at M-003. |
Staff took better control of the biological nitrification process to prevent any further ammonia violations this quarter. |
Violation |
B |
eSMR |
1080183 |
09/09/2020 |
CAT1 |
Ammonia, Total (as N) Monthly Average limit is 9.4 mg/L and reported value was 15 mg/L at M-003. |
Probable causes include lack of adequate nitrification in the treatment process or excessive chloramination. More attention to the nitrification process and ammonia feed will occur in the future. |
Violation |
U |
eSMR |
1080184 |
08/20/2020 |
DMON |
The required weekly influent BOD test was disqualified due to a potential lab error. There was no depletion of oxygen in the BOD bottles. |
Staff will pay closer attention to lab activities to ensure no possible errors in the future. |
Violation |
U |
eSMR |
1076855 |
06/09/2020 |
CAT1 |
Nitrate, Total (as N) Monthly Average limit is 32 mg/L and reported value was 36 mg/L at M-003. |
The plant will be upgraded in the near future to include de-nitrification infrastructure to remove nitrate. |
Violation |
U |
eSMR |
1076854 |
05/15/2020 |
CAT2 |
Chlorine, Total Residual Maximum Daily (MDEL) limit is 0.02 mg/L and reported value was 0.04 mg/L at M-003. |
Staff responded and resolved the excessive chlorination and improper de-chlorination. |
Violation |
U |
eSMR |
1076856 |
05/14/2020 |
CAT2 |
Chlorine, Total Residual Maximum Daily (MDEL) limit is 0.02 mg/L and reported value was 0.04 mg/L at M-003. |
Staff responded and resolved the excessive chlorination and improper de-chlorination. |
Violation |
U |
eSMR |
1072378 |
01/31/2020 |
OEV |
Total Coliform 30-Day Median limit is 23 MPN/100 mL and reported value was 90.5 MPN/100 mL at M-001. |
Staff will increase the chlorine dose during wet weather events in the future. |
Violation |
U |
eSMR |
1072379 |
01/21/2020 |
OEV |
Total Coliform Daily Maximum limit is 240 MPN/100 mL and reported value was 1600 MPN/100 mL at M-001. |
Staff will raise the chlorine dose in the future when flows increase. |
Violation |
U |
eSMR |
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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