| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1128543 |
05/14/2024 |
LREP |
March 2024 was due 5/1/2024 and discharger submitted the report on 5/14/2024. |
|
Violation |
B |
Report |
| 1113702 |
01/16/2023 |
UAUTHDISC |
Approximately 1.1 million gallons of stormwater-diluted screened influent mixed with site stormwater overflowed from the flow equalization basin into Hangtown Creek during 01/16/2023 to 01/17/2023. |
As per the NOV from the CVRWQCB dated 9 February 2023, the City will comply with all requests stated in that document. |
Violation |
B |
eSMR |
| 1113161 |
12/31/2022 |
UAUTHDISC |
Approximately 1.5 million gallons of stormwater-diluted screened influent mixed with site stormwater overflowed from the flow equalization basin into Hangtown Creek. |
|
Violation |
B |
Report |
| 1113160 |
12/19/2022 |
DMON |
The19 December 2022 effluent composite sample was analyzed for TSS outside of the required holding time, so that the Discharger was not able to report monitoring results for TSS at the required frequency |
|
Violation |
B |
Report |
| 1113159 |
10/04/2022 |
DMON |
The 4 October 2022 effluent composite sample was analyzed for BOD outside of the required holding time, so that the Discharger was not able to report monitoring results for BOD at the required frequency |
|
Violation |
B |
Report |
| 1109642 |
09/04/2022 |
CAT1 |
Ammonia, Total (as N) Weekly Average limit is 4.2 mg/L and reported value was 8.6 mg/L at EFF-001. |
Staff investiagted the violation and found the responsible party and issued a Cease and Desist Order, thereby stopping the discharge into the City's collection system and the shock load to the plant. Facility staff plans to install new telemetry at the headworks that will alert staff to changes of pH and conductivity in the influent flow. |
Violation |
B |
eSMR |
| 1103334 |
04/02/2022 |
DMON |
Discharger did not report influent TSS for the week ending 4/2/2022. |
HCWRF will work with contract laboratory to ensure that all tests are done within the established hold times. |
Violation |
B |
eSMR |
| 1088093 |
02/17/2021 |
DMON |
Discharger did not monitor turbidity at the required frequency during 17-19 and 26-27 February. |
SCADA Alarm System was re-programmed on 03/16/2021 by ATEEM, Electrical Engineering, Inc. of Sacramento, California. Full description of what was done will be in the next corrective action section. |
Violation |
B |
eSMR |
| 1084924 |
01/02/2021 |
DMON |
Discharger did not monitor and/or report ammonia, nitrate, and nitrate (including nitrate plus nitrite) at the required frequency. |
The Facility is looking into sampling protocols, forms, and proceedures and will revise them in order that this occurrence does not happen again. The Facility will also begin annual Laboratory Sampling Training starting this year in order to standardize our proceedures. |
Violation |
B |
eSMR |
| 1084923 |
12/26/2020 |
CAT1 |
Ammonia, Total (as N) Weekly Average limit is 4.2 mg/L and reported value was 4.8 mg/L at EFF-001. |
Operational staff increased air flow to the Oxidation Basins. Stopped Belt Press operations. They increased solids in the system by decreasing Wasting and the RAS return rate. Staff monitored the situation closely in order make fine adjustments as needed. |
Violation |
B |
eSMR |
| 1079875 |
08/10/2020 |
Surface Water |
The receiving water limitation for dissolved oxygen is 7.0 mg/L, and the discharger reported 6.5 mg/L at RSW-002. |
Once staff was aware of the low DO situation they took the following action:
Increased the DO in the Effluent by turning on blowers in the post UV channel.
Informed City Hall and State Department of Fish and Wildlife that there was problems with a gold miner.
Staff told miner to leave.
Warden attempted to make contactand set survailence and took information.
Sand bagged dam was taken down.
Creek was returned to its natural course.
Low DO problems ceased. |
Violation |
B |
eSMR |
| 1071285 |
01/31/2020 |
CAT2 |
Zinc, Total Recoverable Monthly Average limit is 37 ug/L and reported value was 42 ug/L at EFF-001. |
Staff will continue to look for the increase of the zinc to the facility. Staff will increase influent monitoring. Staff is finalizing a contract with ERS Industrial Services to rebulid modular treatment unit #2. This will take place as soon as contracts have been finalized. Staff will use MTU #1 for the time being. |
Violation |
B |
eSMR |
| 1068618 |
11/30/2019 |
CAT2 |
Zinc, Total Recoverable Monthly Average limit is 37 ug/L and reported value was 41 ug/L at EFF-001. |
Staff checked the Ferric delivery system and deemed it was operating correctly. Staff will monitor testing results and increase the Ferric dose if the new monthly testing results do not improve. |
Violation |
B |
eSMR |
| 1067293 |
10/18/2019 |
DMON |
Discharger failed to monitor flow rate at EFF-001 continuously for 16 hours due to a tripped circuit. |
Staff found that the Effluent flow meter was on the same circuit as the building's lighting system. Plant staff move the flow meters power supply to an dedicated for only the flow meter. Staff will monitor the flow meter closely to ensure that the change will correct the situation. |
Violation |
B |
eSMR |
| 1065857 |
09/03/2019 |
CAT2 |
Zinc, Total Recoverable Monthly Average limit is 37 ug/L and reported value was 38 ug/L at EFF-001. |
Increased precipitating chemical in the Influent, Ferric Chloride, to take out more Zinc in the Effluent. |
Violation |
B |
eSMR |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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