| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1145908 |
07/30/2025 |
Deficient Reporting |
Failed to report the percentage of total volume of landfill used. Violation of Board Order 6-93-102, MRP section I.3. |
No corrective actions were proposed by the Discharger. To gain compliance with the MRP, the Discharger will need to begin reporting the total volume of landfill used for each monitoring period. |
Violation |
B |
Report |
| 1145964 |
07/30/2025 |
Deficient Reporting |
Failed to report the type of groundwater pump used for purging, the location of pump placement inside the well, and the method of disposing of the purge water. Violation of Board Order 6-93-102, MRP section V.B.e. |
The Discharger did not propose corrective actions. To gain compliance with the MRP, the Discharger needs to report the specific information in each monitoring report. |
Violation |
B |
Report |
| 1145965 |
07/30/2025 |
Deficient Reporting |
Failed to report the types of waste deposited into the waste management unit. Violation of Board Order 6-93-102, MRP section V.B.l. |
The Discharger did not propose corrective action. To gain compliance with the MRP, the Discharger will need to begin reporting the types of wastes that are being deposited at the landfill. The information will need to be reported semi-annually. |
Violation |
B |
Report |
| 1145961 |
07/30/2025 |
Deficient Reporting |
Failed to report the velocity of groundwater flow. Violation of Board Order 6-93-102, MRP section V.B.d. |
The Discharger has not proposed corrective actions. To gain compliance with the MRP, the Discharger needs to calculate the gradient, determine the hydraulic conductivity, and effective porosity of the soil. |
Violation |
B |
Report |
| 1145911 |
04/01/2025 |
DMON |
Failed to sample eight wells for volatile organic compounds during the first semi-annual monitoring event. Violation of Board Order 6-93-102, MRP section III. |
The Discharger did not propose or identify corrective actions. |
Violation |
B |
Report |
| 1145912 |
04/01/2025 |
GWAT |
Exceeded background concentrations and the California Division of Drinking Water maximum contaminant level for various volatile organic compounds, total dissolved solids, nitrate (as nitrogen), and chloride. Violation of Board Order 6-93-102, WDR section II.A.2.b, and II.B.14. |
The Discharger has submitted an Engineering Feasibility Study and Corrective Action Plan. Remedial alternatives are under review by Water Board staff. |
Violation |
B |
Report |
| 1146360 |
11/05/2024 |
GWAT |
Uranium detected above the MCL in 13 wells, perchlorate detected above the MCL in 3 wells, and perchlorate detected above background in 11 wells at the Facility. Violation of Board Order 6-93-102, WDR section II.B.14. |
Uranium (MCL 0.03 mg/L): LF-A (0.0898 mg/L - 0.0952 mg/L), LF-B (0.0481 mg/L - 0.0581 mg/L), LF-E (0.03 mg/L - 0.124 mg/L), LF-F (0.271 mg/L - 0.278 mg/L), LF-G (0.0736 mg/L - 0.103 mg/L), LF-H (0.0385 mg/L - 0.0522 mg/L), LF-I (0.119 mg/L - 0.127 mg/L), LF-J (0.0311 mg/L), LF-M (0.0318 mg/L), LF-N (0.0768 mg/L - 0.0862 mg/L), LF-P (0.0308 mg/L), LF-Q (0.0543 mg/L - 0.0729 mg/L), LF-R (0.157 mg/L - 0.192 mg/L).
Perchlorate (MCL 0.006 mg/L): LF-2 (0.000453 mg/L), LF-A (0.00627 mg/L - 0.00712 mg/L), LF-B (0.00141 mg/L - 0.00224 mg/L), LF-E (0.00278 mg/L - 0.00342 mg/L), LF-F (0.00403 mg/L - 0.0043 mg/L), LF-I (0.0082 mg/L - 0.00908 mg/L), LF-J (0.00201 mg/L - 0.00225 mg/L), LF-K (0.00105 mg/L - 0.00121 mg/L), LF-L (0.000253 mg/L - 0.000299 mg/L), LF-N (0.00252 mg/L - 0.00273 mg/L), LF-P (0.00192 mg/L - 0.00208 mg/L), LF-Q (0.00203 mg/L - 0.00237 mg/L), LF-R (0.00797 mg/L - 0.00838 mg/L). |
Violation |
B |
Report |
| 1145948 |
09/11/2024 |
DMON |
Failed to sample several groundwater wells for volatile organic compounds during the second semi-annual 2024 monitoring event. Violation of Board Order 6-93-102, MRP section III. |
The Discharger did not propose or identify corrective actions. |
Violation |
B |
Report |
| 1145947 |
03/27/2024 |
DMON |
Failed to sample several groundwater wells for volatile organic compounds during the first semi-annual 2024 monitoring event. Violation of Board Order 6-93-102, MRP section III. |
The Discharger did not propose or identify corrective actions. |
Violation |
B |
Report |
| 1128025 |
09/21/2023 |
DMON |
Failed to sample several groundwater wells for volatile organic compounds and failed to obtain field parameters for one well during the 2023 second semi-annual groundwater monitoring event. Violation of Board Order 6-93-102, WDR section III.B.1 |
Lahontan Water Board staff are working with the Discharger to return to compliance. |
Violation |
B |
Report |
| 1128024 |
09/21/2023 |
GWAT |
Exceeded concentration limits (background) for VOCs, nitrate (as N) and total dissolved solids in several wells during the 2023 second semi-annual groundwater monitoring event. Violation of Board Order 6-93-102 II.A.2.b. |
The exceedances are from a known release from the landfill. Lahontan staff are working with the Discharger to implement source control and other corrective actions to reduce concentrations in groundwater. |
Violation |
B |
Report |
| 1119312 |
08/10/2023 |
Order Conditions |
Unsuccessful design and construction of the landfill to maintain a stormwater runon control system that prevents flow onto the active portion of the landfill during peak discharge from a 25-year storm. Violation of Board Order 6-93-102, WDR section I.C.g |
Lahontan Water Board staff are working with the discharger on corrective action measures which includes an evaluation of the landfill design and interim cover. The discharger is currently in evaluation monitoring and is in the process of preparing a corrective action plan. |
Violation |
B |
Inspection |
| 1124880 |
07/15/2023 |
LREP |
Failed to submit the 2023 first semi-annual monitoring report by July 15, 2023. Violation of Board Order 6-93-102, MRP section V.B. |
The report was submitted on February 23, 2024. |
Violation |
B |
Report |
| 1127737 |
04/15/2023 |
LREP |
Failed to submit the 2023 Annual Groundwater Monitoring Report by April 15, 2023. Violation of Board Order 6-93-102, MRP section V.B.2., and MRP section III.B. |
The discharger has not proposed or identified corrective actions. Lahontan Water Board staff are working to have the discharger return to compliance. |
Violation |
B |
Report |
| 1125999 |
03/17/2023 |
GWAT |
Exceeded concentration limits (background) for VOCs and total dissolved solids in several wells during the 2023 first semi-annual groundwater monitoring event. Violation of Board Order 6-93-102 II.A.2.b. |
The exceedances are from a known release from the landfill. Lahontan staff are working with the Discharger to implement source control and other corrective actions to reduce concentrations in groundwater. |
Violation |
B |
Report |
| 1145942 |
03/15/2023 |
DMON |
Failed to sample several groundwater wells for volatile organic compounds during the first semi-annual 2023 monitoring event. Violation of Board Order 6-93-102, MRP section III. |
The Discharger did not propose or identify corrective actions. |
Violation |
B |
Report |
| 1127734 |
01/15/2023 |
LREP |
Failed to submit the 2022 2nd semi-annual groundwater monitoring report by January 15, 2023. Violation of Board Order 6-93-102, MRP section V.B.1, and MRP section III.B. |
The discharger has not proposed or identified corrective actions. Lahontan Water Board staff are working to return the discharger to compliance. |
Violation |
B |
Report |
| 1145941 |
09/21/2022 |
DMON |
Failed to sample several groundwater wells for volatile organic compounds during the second semi-annual 2022 monitoring event. Violation of Board Order 6-93-102, MRP section III. |
The Discharger did not propose or identify corrective actions. |
Violation |
B |
Report |
| 1127738 |
07/15/2022 |
LREP |
Failed to submit the 2022 1st semi-annual groundwater monitoring report by July 15, 2022. Violation of Board Order 6-93-102, MRP section IV.B.1., and MRP section III.B. |
The discharger has not proposed corrective actions. Lahontan Water Board staff are working to have the discharger return to compliance. |
Violation |
B |
Report |
| 1145939 |
03/17/2022 |
DMON |
Failed to sample several groundwater wells for volatile organic compounds during the first semi-annual 2022 monitoring event. Violation of Board Order 6-93-102, MRP section III. |
The Discharger did not propose or identify corrective actions. |
Violation |
B |
Report |
| 1146046 |
03/31/2021 |
GWAT |
Exceeded the MCL for several metals, inorganics, and volatile organic compounds and exceeded background for several other VOCs in groundwater during the first semi-annual 2021 groundwater monitoring event. Violation of Board Order 6-93-102, WDR section WDR section II.A.2.b, and II.B.14. |
A staff enforcement letter was sent to SIAD personnel on September 22, 2020. Water Board staff are transitioning the SIAD landfill to an EMP and the SIAD personnel are in the process of securing a contract to delineate the release and to prepare an EFS for a corrective action plan (CAP). The CAP will be submitted by March 2022.
|
Violation |
A |
Report |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
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