| Violation ID |
Occurred Date |
Violation Type |
(-) Violation Description |
Corrective Action |
Status |
Classification |
Source |
| 1141717 |
02/28/2025 |
CAT2 |
Chromium (VI) Monthly Average (Mean) limit is 5.6 ug/L and reported value was 13 ug/L at EFF-004. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Active Treatment System (ATS) to evaluate the source of the exceedance and the performance of the ATS. Based on the ATS evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize performance. SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
B |
eSMR |
| 1140523 |
01/31/2025 |
CAT2 |
Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 14 ug/L at EFF-004. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Active Treatment System (ATS) to evaluate the source of the exceedance and the performance of the ATS. Based on the ATS evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize performance. SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
B |
eSMR |
| 1139194 |
12/31/2024 |
CAT2 |
Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 40 ug/L at EFF-004. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Active Treatment System (ATS) to evaluate the source of the exceedance and the performance of the ATS. Based on the ATS evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize performance. SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
B |
eSMR |
| 1139195 |
12/16/2024 |
ATOX |
Acute Toxicity-Fathead Minnow-survival Instantaneous Minimum limit is 70 % survival and reported value was 65 % survival at EFF-004. |
Stevens Creek Quarry (SCQ) will investigate the cause of mortalities and conduct internal monitoring of the Active Treatment System (ATS) to evaluate the source of the exceedance and the performance of the ATS. Based on the ATS evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize performance. SCQ will retrain sampling staff on proper sampling techniques. SCQ will report on mortality investigation findings in the January 2025 SMR. |
Violation |
B |
eSMR |
| 1139193 |
12/16/2024 |
CAT2 |
Chromium (VI) Daily Maximum limit is 16 ug/L and reported value was 40 ug/L at EFF-004. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Active Treatment System (ATS) to evaluate the source of the exceedance and the performance of the ATS. Based on the ATS evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize performance. SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
B |
eSMR |
| 1138254 |
11/30/2024 |
CAT2 |
Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 7.6 ug/L at EFF-004. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Active Treatment System (ATS) to evaluate the source of the exceedance and the performance of the ATS. Based on the ATS evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize performance. SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
B |
eSMR |
| 1139645 |
11/25/2024 |
DMON |
On November 25, SCQ collected an acute toxicity sample at EFF-004, which followed the proper sampling technique and occurred under normal ATS operating conditions. On November 26, 2024, discharge ceased from EFF-004. On November 27, SCQ was notified by the laboratory via email, that it did not conduct the acute toxicity test due to using the wrong sample for testing. Therefore, the original sample extended beyond the 36-hour hold time and the acute toxicity test could not be completed. |
SCQ will retrain sampling staff on proper sampling techniques and will continue to work with the laboratory to ensure samples are processed within hold times. |
Violation |
B |
eSMR |
| 1139638 |
10/15/2024 |
DMON |
The discharge observed on October 11, 2024, continued through October 15, 2024. SCQ did not implement Receiving Water Monitoring Requirements, as required by Attachment E, section IV.B, and Table E-4. |
SCQ will retrain sampling staff on proper sampling techniques and will sample and report all unauthorized discharges at the Facility. |
Violation |
U |
eSMR |
| 1139646 |
10/15/2024 |
DMON |
The discharge observed on October 11, 2024, continued through October 15, 2024. SCQ did not implement Receiving Water Monitoring Requirements, as required by Attachment E, section IV.B, and Table E-4. |
SCQ will retrain sampling staff on proper sampling techniques and will sample and report all unauthorized discharges at the Facility. |
Violation |
U |
eSMR |
| 1139647 |
10/15/2024 |
DMON |
The discharge observed on October 11, 2024, continued through October 15, 2024. SCQ did not implement Receiving Water Monitoring Requirements, as required by Attachment E, section IV.B, and Table E-4. |
SCQ will retrain sampling staff on proper sampling techniques and will sample and report all unauthorized discharges at the Facility. |
Violation |
U |
eSMR |
| 1139649 |
10/15/2024 |
DMON |
The discharge observed on October 11, 2024, continued through October 15, 2024. SCQ did not implement Receiving Water Monitoring Requirements, as required by Attachment E, section IV.B, and Table E-4. |
SCQ will retrain sampling staff on proper sampling techniques and will sample and report all unauthorized discharges at the Facility. |
Violation |
U |
eSMR |
| 1139639 |
10/11/2024 |
DMON |
An unauthorized discharge of untreated process water from Sediment Trap 3 at Discharge Point 004 during RWQCB inspection was observed on October 11, 2024. The untreated process water flowed to a receiving water (Swiss Creek) through a space between a black, plastic pipe (discharge pipe from a treatment system) and a concrete culvert that the discharge pipe was installed into. The discharge, which was ongoing during the inspection, violated Permit discharge prohibitions III.A and III.B and monitoring requirements in Permit Attachment E, section III.A. Samples were not collected at the time of the inspection. |
Stevens Creek Quarry (SCQ) sampled the unauthorized discharge on October 15, 2024. On October 15, 2024, approximately 60,000 gallons total were transferred from Sediment Trap 3 to the ATS, enough to prevent further discharges through outfall EFF-004. No water that was transferred to the ATS was processed or discharged through EFF-004. SCQ plans to review drainage area calculations to evaluate ATS process flow rates and volumes. The discharge observed on October 11, 2024, continued through October 15, 2024. On October 15, 2024, samples were collected, excluding Turbidity and Acute Toxicity from EFF-004. |
Violation |
U |
eSMR |
| 1139640 |
10/11/2024 |
Order Conditions |
An unauthorized discharge of untreated process water from Sediment Trap 3 at Discharge Point 004 during RWQCB inspection was observed on October 11, 2024. The untreated process water flowed to a receiving water (Swiss Creek) through a space between a black, plastic pipe (discharge pipe from a treatment system) and a concrete culvert that the discharge pipe was installed into. The discharge, which was ongoing during the inspection, violated Permit discharge prohibitions III.A and III.B and monitoring requirements in Permit Attachment E, section III.A. The RWQCB sent SCQ an Inspection Report on December 27, 2024, notifying them of the observed unauthorized discharge and a request for corrective actions. |
Stevens Creek Quarry (SCQ) sampled the unauthorized discharge on October 15, 2024. On October 15, 2024, approximately 60,000 gallons were transferred from Sediment Trap 3 to the ATS, enough to prevent further discharges through outfall EFF-004. No water that was transferred to the ATS was processed or discharged through EFF-004. SCQ plans to review drainage area calculations to evaluate ATS process flow rates and volumes. To prevent reoccurrence, SCQ installed a water pump activation float in Sediment Trap 3. This system automatically activates the pump to ensure untreated water does not discharge into Swiss Creek. Additionally, the surface of Sediment Trap 3 was thoroughly skimmed and cleaned of vegetation, leaves, and floating debris to maintain optimal functionality and water quality. |
Violation |
U |
eSMR |
| 1139648 |
10/11/2024 |
Order Conditions |
The discharge of untreated process water from Sediment Trap 3 affected water quality in Swiss Creek during RWQCB inspection was observed on October 11, 2024. The RWQCB observed sediment in the tributary from Discharge Point 004 and foam and aquatic growth downstream of the tributary that was not visible upstream. Permit receiving water limitations V.A.1 and V.A.4 prohibit discharges from causing floating materials (foams, scum), bottom deposits, and aquatic growths that affect the beneficial uses of receiving waters. |
The discharge was observed on October 11, 2024, and continued through October 15, 2024. SCQ sampled the unauthorized discharge on October 15, 2024. Additionally, on October 15, 2024, approximately 60,000 gallons were transferred from Sediment Trap 3 to the ATS, enough to prevent further discharges through outfall EFF-004. No water that was transferred to the ATS was processed or discharged through EFF-004. SCQ plans to review drainage area calculations to evaluate ATS process flow rates and volumes. |
Violation |
U |
eSMR |
| 1125370 |
02/29/2024 |
CAT2 |
Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 9.8 ug/L at EFF-004. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Active Treatment System (ATS) to evaluate the source of the exceedance and the performance of the ATS. Based on the ATS evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize performance. SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
B |
eSMR |
| 1139643 |
02/01/2024 |
CAT1 |
Settleable Solids Daily Maximum limit is 1 ml/L/hr and reported value was 3 ml/L/hr at EFF-004. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Active Treatment System (ATS) to evaluate the source of the exceedance and the performance of the ATS. Based on the ATS evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize performance. SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
B |
eSMR |
| 1125371 |
02/01/2024 |
Surface Water |
Exceedance of R2-2021-0010, Section V. Turbidity, Instantaneous Maximum limit is 55 NTU and reported value was 57.18 NTU. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Site to evaluate the source of the exceedance. Based on the Site evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize BMP performance. |
Violation |
B |
eSMR |
| 1139655 |
02/01/2024 |
Surface Water |
Exceedance of R2-2021-0010, Section V. Turbidity, Instantaneous Maximum limit is 55 NTU and reported value was 57.18 NTU. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Site to evaluate the source of the exceedance. Based on the Site evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize BMP performance. |
Violation |
U |
eSMR |
| 1124649 |
01/31/2024 |
CAT2 |
Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 9.8 ug/L at EFF-004. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Active Treatment System (ATS) to evaluate the source of the exceedance and the performance of the ATS. Based on the ATS evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize performance. SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
B |
eSMR |
| 1124651 |
01/22/2024 |
Surface Water |
Exceedance of R2-2021-0010, Section V. Turbidity, Instantaneous Maximum limit is 55 NTU and reported value was 143.37 NTU. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Site to evaluate the source of the exceedance. Based on the Site evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize BMP performance. |
Violation |
U |
eSMR |
| 1139654 |
01/22/2024 |
Surface Water |
Exceedance of R2-2021-0010, Section V. Turbidity, Instantaneous Maximum limit is 55 NTU and reported value was 143.37 NTU. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Site to evaluate the source of the exceedance. Based on the Site evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize BMP performance. |
Violation |
U |
eSMR |
| 1124650 |
01/22/2024 |
Surface Water |
Exceedance of R2-2021-0010, Section V. Turbidity, Instantaneous Maximum limit is 90.9 NTU (10% increase from 82.65 NTU background level) and reported value was 205.12 NTU. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Site to evaluate the source of the exceedance. Based on the Site evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize BMP performance. |
Violation |
B |
eSMR |
| 1123377 |
12/31/2023 |
CAT2 |
Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 7.3 ug/L at EFF-004. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Active Treatment System (ATS) to evaluate the source of the exceedance and the performance of the ATS. Based on the ATS evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize performance. SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
B |
eSMR |
| 1123376 |
12/18/2023 |
DMON |
Exceedance of R2-2021-0010, Section V. SCQ did not sample for Dissolved Oxygen in milligrams per liter (mg/L). |
SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
B |
eSMR |
| 1123379 |
12/18/2023 |
DMON |
Exceedance of R2-2021-0010, Section V. SCQ did not sample for Dissolved Oxygen in milligrams per liter (mg/L). |
SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
B |
eSMR |
| 1123380 |
12/18/2023 |
DMON |
Exceedance of R2-2021-0010, Section V. SCQ did not sample for Dissolved Oxygen in milligrams per liter (mg/L). |
SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
B |
eSMR |
| 1123381 |
12/18/2023 |
DMON |
Exceedance of R2-2021-0010, Section V. SCQ did not sample for Dissolved Oxygen in milligrams per liter (mg/L). |
SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
B |
eSMR |
| 1123568 |
12/18/2023 |
DMON |
Exceedance of R2-2021-0010, Section V. SCQ did not sample for Dissolved Oxygen in milligrams per liter (mg/L). |
SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
U |
eSMR |
| 1123569 |
12/18/2023 |
DMON |
Exceedance of R2-2021-0010, Section V. SCQ did not sample for Dissolved Oxygen in milligrams per liter (mg/L). |
SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
U |
eSMR |
| 1123571 |
12/18/2023 |
DMON |
Exceedance of R2-2021-0010, Section V. SCQ did not sample for Dissolved Oxygen in milligrams per liter (mg/L). |
SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
U |
eSMR |
| 1123574 |
12/18/2023 |
DMON |
Exceedance of R2-2021-0010, Section V. SCQ did not sample for Dissolved Oxygen in milligrams per liter (mg/L). |
SCQ will retrain sampling staff on proper sampling techniques. |
Violation |
U |
eSMR |
| 1123378 |
12/18/2023 |
Surface Water |
Exceedance of R2-2021-0010, Section V. Turbidity, Instantaneous Maximum limit is 50 NTU and reported value was 127.47 NTU. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Site to evaluate the source of the exceedance. Based on the Site evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize BMP performance. |
Violation |
B |
eSMR |
| 1123570 |
12/18/2023 |
Surface Water |
Exceedance of R2-2021-0010, Section V. Turbidity, Instantaneous Maximum limit is 50 NTU and reported value was 127.47 NTU. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Site to evaluate the source of the exceedance. Based on the Site evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize BMP performance. |
Violation |
U |
eSMR |
| 1115052 |
02/28/2023 |
CAT2 |
Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 5.9 ug/L at EFF-004. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Active Treatment System (ATS) to evaluate the source of the exceedance and the performance of the ATS. Based on the ATS evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize performance. |
Violation |
B |
eSMR |
| 1114157 |
01/31/2023 |
CAT2 |
Copper, Total Monthly Average limit is 14 ug/L and reported value was 65 ug/L at EFF-004. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Active Treatment System (ATS) to evaluate the source of the exceedance and the performance of the ATS. Based on the ATS evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize performance. |
Violation |
B |
eSMR |
| 1114159 |
01/31/2023 |
CAT2 |
Lead, Total Monthly Average limit is 8.1 ug/L and reported value was 16 ug/L at EFF-004. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Active Treatment System (ATS) to evaluate the source of the exceedance and the performance of the ATS. Based on the ATS evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize performance. |
Violation |
B |
eSMR |
| 1114156 |
01/31/2023 |
CAT2 |
Nickel, Total Monthly Average limit is 93 ug/L and reported value was 130 ug/L at EFF-004. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Active Treatment System (ATS) to evaluate the source of the exceedance and the performance of the ATS. Based on the ATS evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize performance. |
Violation |
B |
eSMR |
| 1114160 |
01/09/2023 |
OEV |
pH Instantaneous Maximum limit is 8.5 SU and reported value was 8.93 SU at EFF-006. |
Stevens Creek Quarry (SCQ) will assess the pH meter's accuracy by making sure the field meter is properly calibrated and rinsed with distilled water. SCQ will determine if the pH is faulty and assess if a new meter is needed for the project. |
Violation |
B |
eSMR |
| 1114158 |
01/05/2023 |
OEV |
pH Instantaneous Maximum limit is 8.5 SU and reported value was 8.75 SU at EFF-004. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Active Treatment System (ATS) to evaluate the source of the exceedance and the performance of the ATS. Based on the ATS evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize performance. |
Violation |
B |
eSMR |
| 1114161 |
01/05/2023 |
CAT2 |
Copper, Total Daily Maximum limit is 34 ug/L and reported value was 65 ug/L at EFF-004. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Active Treatment System (ATS) to evaluate the source of the exceedance and the performance of the ATS. Based on the ATS evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize performance. |
Violation |
B |
eSMR |
| 1123572 |
01/05/2023 |
Surface Water |
Exceedance of R2-2021-0010, Section V. Turbidity, Instantaneous Maximum limit is 50 NTU and reported value was 797 NTU. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Site to evaluate the source of the exceedance. Based on the Site evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize BMP performance. |
Violation |
U |
eSMR |
| 1123573 |
01/05/2023 |
Surface Water |
Exceedance of R2-2021-0010, Section V. pH, Instantaneous Maximum limit is <6.5; or >8.5 SU and reported value was 8.68 SU. |
Stevens Creek Quarry (SCQ) will conduct internal monitoring of the Site to evaluate the source of the exceedance. Based on the Site evaluation, SCQ will implement needed repairs as they arise and continue to conduct routine sediment removal of the settling tanks to optimize BMP performance. |
Violation |
U |
eSMR |
| 1103739 |
03/31/2022 |
CAT2 |
Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 26 ug/L at EFF-003. |
The Quarry drew down the water level in Sediment Trap 2 that discharges at 003 and refreshed the erosion control BMPs prior to the next storm event. |
Violation |
B |
eSMR |
| 1103736 |
03/31/2022 |
CAT2 |
Copper, Total Monthly Average limit is 14 ug/L and reported value was 23 ug/L at EFF-002. |
The Quarry drew down the water level in Sediment Trap 1 that discharges at 002 and refreshed the erosion control BMPs prior to the next storm event. |
Violation |
B |
eSMR |
| 1103737 |
03/31/2022 |
CAT2 |
Copper, Total Monthly Average limit is 14 ug/L and reported value was 43 ug/L at EFF-003. |
The Quarry drew down the water level in Sediment Trap 2 that discharges at 003 and refreshed the erosion control BMPs prior to the next storm event. |
Violation |
B |
eSMR |
| 1103738 |
03/28/2022 |
CAT2 |
Chromium (VI) Daily Maximum limit is 16 ug/L and reported value was 26 ug/L at EFF-003. |
The Quarry drew down the water level in Sediment Trap 2 that discharges at 003 and refreshed the erosion control BMPs prior to the next storm event. |
Violation |
B |
eSMR |
| 1103740 |
03/28/2022 |
CAT2 |
Copper, Total Daily Maximum limit is 34 ug/L and reported value was 43 ug/L at EFF-003. |
The Quarry drew down the water level in Sediment Trap 2 that discharges at 003 and refreshed the erosion control BMPs prior to the next storm event. |
Violation |
B |
eSMR |
| 1099663 |
12/31/2021 |
CAT2 |
Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 12 ug/L at EFF-004. |
An advanced treatment system (ATS) was installed and has been in operation as of January 1, 2022. Runoff will be routed through the ATS prior to discharge at 004. |
Violation |
B |
eSMR |
| 1099656 |
12/31/2021 |
CAT2 |
Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 26 ug/L at EFF-003. |
The Quarry will draw down the water level in Sediment Trap 2 that discharges at 003 and refresh the erosion control BMPs prior to the next storm event. |
Violation |
B |
eSMR |
| 1099659 |
12/31/2021 |
CAT2 |
Copper, Total Monthly Average limit is 14 ug/L and reported value was 46 ug/L at EFF-004. |
An advanced treatment system (ATS) was installed and has been in operation as of January 1, 2022. Runoff will be routed through the ATS prior to discharge at 004. |
Violation |
B |
eSMR |
| 1099657 |
12/31/2021 |
CAT2 |
Copper, Total Monthly Average limit is 14 ug/L and reported value was 76 ug/L at EFF-003. |
The Quarry will draw down the water level in Sediment Trap 2 that discharges at 003 and refresh the erosion control BMPs prior to the next storm event. |
Violation |
B |
eSMR |
| 1099662 |
12/31/2021 |
CAT2 |
Lead, Total Monthly Average limit is 8.1 ug/L and reported value was 13 ug/L at EFF-003. |
The Quarry will draw down the water level in Sediment Trap 2 that discharges at 003 and refresh the erosion control BMPs prior to the next storm event. |
Violation |
B |
eSMR |
| 1099664 |
12/31/2021 |
CAT2 |
Lead, Total Monthly Average limit is 8.1 ug/L and reported value was 9.6 ug/L at EFF-004. |
An advanced treatment system (ATS) was installed and has been in operation as of January 1, 2022. Runoff will be routed through the ATS prior to discharge at 004. |
Violation |
B |
eSMR |
| 1099665 |
12/31/2021 |
CAT2 |
Nickel, Total Monthly Average limit is 93 ug/L and reported value was 120 ug/L at EFF-003. |
The Quarry will draw down the water level in Sediment Trap 2 that discharges at 003 and refresh the erosion control BMPs prior to the next storm event. |
Violation |
B |
eSMR |
| 1099661 |
12/13/2021 |
CAT2 |
Chromium (VI) Daily Maximum limit is 16 ug/L and reported value was 26 ug/L at EFF-003. |
The Quarry will draw down the water level in Sediment Trap 2 that discharges at 003 and refresh the erosion control BMPs prior to the next storm event. |
Violation |
B |
eSMR |
| 1099660 |
12/13/2021 |
CAT2 |
Copper, Total Daily Maximum limit is 34 ug/L and reported value was 46 ug/L at EFF-004. |
An advanced treatment system (ATS) was installed and has been in operation as of January 1, 2022. Runoff will be routed through the ATS prior to discharge at 004. |
Violation |
B |
eSMR |
| 1099658 |
12/13/2021 |
CAT2 |
Copper, Total Daily Maximum limit is 34 ug/L and reported value was 76 ug/L at EFF-003. |
The Quarry will draw down the water level in Sediment Trap 2 that discharges at 003 and refresh the erosion control BMPs prior to the next storm event. |
Violation |
B |
eSMR |
| 1099649 |
10/31/2021 |
CAT2 |
Copper, Total Monthly Average limit is 14 ug/L and reported value was 25 ug/L at EFF-002. |
The Quarry drew down the water level in Sediment Trap 1 that discharges at 002 and refreshed the erosion control BMPs prior to the next storm event. |
Violation |
B |
eSMR |
|
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
|
