| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1122157 |
10/01/2023 |
DMON |
Due to a computer failure there was no EFF NTU data from 10/1-10/3/2023. |
A new computer was installed and the weekly download/recording of data restored. |
Violation |
B |
eSMR |
| 1122156 |
10/01/2023 |
DMON |
Due to a computer failure there was no UV DOSE or UV TRANS recorded from 10/1-10/3/2023 |
A new computer was installed and the weekly download/recording of data restored. |
Violation |
B |
eSMR |
| 1121306 |
09/11/2023 |
DMON |
Beginning on September 10, 2023 and continuing through September 30, 2023 the was no EFF NTU DATA because of a computer failure. |
A new computer was installed to receive/store downloaded data from the SCADA computer. |
Violation |
B |
eSMR |
| 1121305 |
09/10/2023 |
DMON |
Beginning September 10, 2023 through September 30, 2023 there was no UVS-001 UVT or DOSE DATA recorded because of a computer failure. |
A new computer has been installed to receive/store downloaded DATA from the SCADA computer. |
Violation |
B |
eSMR |
| 1117405 |
04/27/2023 |
Order Conditions |
Turbidity Instantaneous Maximum limit is 0.5 NTU and reported value was 1.7 NTU at EFF-001. |
We plan on changing the delay for call out for high turbidity from its current 5 minute delay to 60 seconds. |
Violation |
B |
eSMR |
| 1117406 |
04/24/2023 |
DMON |
pH and Dissolved oxygen sampler were not collected on the week of April 24th due to a lack water. |
Collected pH and Dissolved Oxygen samples earlier in the month when water is present. |
Violation |
B |
eSMR |
| 1118330 |
02/16/2023 |
DMON |
Section IX.B.1.b of the Municipal General Order MRP requires discharger to monitor PND-001 when wastewater is stored in the pond for more than 7 consecutive days. Wastewater was stored in PND-001 for more than 7 days in April 2023. However, there was no water in the pond when sampling was attempted on 24 April 2023. |
The Discharger will conduct monitoring earlier in the month when wastewater is present in PND-001 for more than 7 consecutive days. |
Violation |
B |
Report |
| 1109542 |
09/20/2022 |
DMON |
Turbidity Other limit is 0 JTU and reported value was 0 JTU at EFF-001. |
The desktop computer is now downloading trends weekly as scheduled. The EFF Turbidity has an alarm setpoint for turbidity of 0.5 NTU, and there were no High Turbidity alarms for the month of September.
|
Violation |
B |
eSMR |
| 1108763 |
08/06/2022 |
Deficient Reporting |
The UVS-001 sample was taken on 8/3/2022 by the operator and received by the lab (Cranmer Engineering Inc.) on the same day at 14:35, they reported that they processed the sample incorrectly and therefore found it necessary to cancel the sample. |
A letter of explanation from from Cranmer Engineering Inc. is included in Attachments folder. |
Violation |
B |
eSMR |
| 1095932 |
09/08/2021 |
Order Conditions |
FIL-002 NTUs exceeded 0.5 on 9/8/2021 and 9/15/2021. |
Operator conducted maintenance on UV disinfection system without putting turbidimeter on hold. |
Violation |
B |
eSMR |
| 1100227 |
08/18/2021 |
Order Conditions |
The Discharger violated the operation and maintenance limitation for turbidity, instantaneous maximum limit of 0.5 NTU, measured at 0.9 NTU |
|
Violation |
B |
Report |
| 1089594 |
01/13/2021 |
CAT2 |
Copper, Total Recoverable Monthly Average (Mean) limit is 1.6 ug/L and reported value was 2.2 ug/L at EFF-001. |
Maintain hardness above 65mg/L |
Violation |
B |
eSMR |
| 1089595 |
01/13/2021 |
CAT2 |
Zinc, Total Recoverable Daily Maximum limit is 23 ug/L and reported value was 48 ug/L at EFF-001. |
Maintain Hardness above 65 mg/L |
Violation |
B |
eSMR |
| 1084541 |
10/14/2020 |
CAT2 |
Copper, Total Monthly Average limit is 1.6 ug/L and reported value was 3.1 ug/L at EFF-001. |
Maintain Hardness above 65mg/L. |
Violation |
B |
eSMR |
| 1084542 |
10/14/2020 |
CAT2 |
Zinc, Total Monthly Average limit is 23 ug/L and reported value was 43 ug/L at EFF-001. |
Maintain Hardness above 65mg/L. |
Violation |
B |
eSMR |
| 1080893 |
09/09/2020 |
OEV |
Turbidity Instantaneous Maximum limit is 0.5 NTU and reported value was 00.841 NTU at EFF-001. |
Supply tubing to the NTU meter has been replaced, continuing with the twice per week cleaning of the turbidimeter. |
Violation |
B |
eSMR |
| 1073484 |
01/16/2020 |
CAT2 |
Zinc, Total Recoverable Monthly Average limit is 23 ug/L and reported value was 40 ug/L at EFF-001. |
Nevada County Sanitation District is working with board staff to find ways to reduce zinc in our effluent. Cascade Shores continues to be under the TSO Zinc limit of 150 ug/L. |
Violation |
B |
eSMR |
| 1071236 |
01/14/2020 |
Order Conditions |
On 1/14/2020 @ 14:18:22 there was a spike in effluent turbidity of 0.762 NTU, which exceeds the permitted maximum of 0.5 NTU at any time. |
The flow to the NTU meter was found to be greater than the manufacturers recoomended flow rate, the flow rate has been adjusted to be within the recommended flow rate. |
Violation |
B |
eSMR |
| 1070090 |
12/24/2019 |
OEV |
Turbidity Instantaneous Maximum limit is 0.5 NTU and reported value was 1.63 NTU at EFF-001. |
Troubleshoot motor controlled isolation valves downstream of filters. |
Violation |
B |
eSMR |
| 1068241 |
10/18/2019 |
CAT2 |
Copper, Total Recoverable Monthly Average limit is 1.6 ug/L and reported value was 3.0 ug/L at EFF-001. |
Cascade Shores continues to be under the TSO copper limit of 25.5 ug/L. Cascade Shore is Piloting a new product called MetalZorb. |
Violation |
B |
eSMR |
| 1068242 |
10/18/2019 |
CAT2 |
Zinc, Total Recoverable Monthly Average limit is 23 ug/L and reported value was 36 ug/L at EFF-001. |
Cascade Shores continues to be under the TSO copper limit of 150 ug/L. Cascade Shore is Piloting a new product called MetalZorb. |
Violation |
B |
eSMR |
| 1066013 |
07/16/2019 |
CAT2 |
Copper, Total Recoverable Monthly Average limit is 1.6 ug/L and reported value was 1.9 ug/L at EFF-001. |
Nevada County Sanitation District has received SRF funding and County Board approval to proceed with the design phase of the new Leachfield Plant. Construction is scheduled to begin in the fall of 2019. This will eliminate the effluent copper limit. Cascade Shores continues to be under the TSO copper limit of 25.5 ug/L. |
Violation |
B |
eSMR |
| 1066012 |
07/16/2019 |
CAT2 |
Zinc, Total Recoverable Monthly Average limit is 23 ug/L and reported value was 31 ug/L at EFF-001. |
Nevada County Sanitation District has received SRF funding and County Board approval to proceed with the design phase of the new Leachfield Plant. Construction is scheduled to begin in the Fall of 2019. This will eliminate the effluent Zinc limit. Cascade Shores continues to be under the TSO Zinc limit of 150 ug/L. |
Violation |
B |
eSMR |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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