Party At-A-Glance Report

  
  
  
  
  
General Information
Party ID Party Name Party Classification Mailing Address Work Phone Email/Website
624262 Stevens Creek Quarry, Inc. Privately-Owned Business 12100 Stevens Canyon Road Cupertino, CA 95014 408-253-2512 None
  
  
  
  
Expand/Contract Related Places
Related Places
Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date
863643 Stevens Creek Quarry Santa Clara 2 Sand and Gravel Mining Owner and Operator 05/12/2021 None
Total Related Places: 1
  
  
  
  
Expand/Contract Related Parties
Related Parties
Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification
629636 Ryan Charney Person Data Submitter 12/08/2021 None None
629196 Lisa Welsh Person Data Submitter 11/19/2021 None None
627845 Neftali Romero Person Data Submitter 09/27/2021 None None
627172 Julio Cazares Person Data Submitter 08/26/2021 None None
624263 Jason Voss Person Legally Responsible Official 05/12/2021 None None
364108 Adrienne Miller Person Data Submitter 08/26/2021 None None
Total Related Parties: 6
  
  
  
  
Expand/Contract Regulatory Measures
Regulatory Measures (non-enforcement)
Reg. Measure ID Regulatory Measure Type Region WDID Status Program Order No. RM Effective Date RM Termination Date Relationship Relationship Start Date Relationship End Date Amended?
443276 NPDES Permit 2 2 43I006687 Active NPDMINING R2-2021-0010 07/01/2021 None Discharger 05/12/2021 None N
Total Regulatory Measures: 1
  
  
  
  
Expand/Contract Violations
Violations within the past five years
Violation ID Occurrence Date Violation Type Violation Description(+) Violation Status Priority Source Facility Name Violated Reg. Meas. ID Violated Reg. Meas. Order No. Linked to Enf.
1141717 02/28/2025 CAT2 Chromium (VI) Monthly Average (Mean) limit is 5.6 ug/L and reported value was 13 Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1140523 01/31/2025 CAT2 Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 14 ug/L a Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1139655 02/01/2024 Surface Water Exceedance of R2-2021-0010, Section V. Turbidity, Instantaneous Maximum limit is Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1139654 01/22/2024 Surface Water Exceedance of R2-2021-0010, Section V. Turbidity, Instantaneous Maximum limit is Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1139649 10/15/2024 Deficient Monitoring The discharge observed on October 11, 2024, continued through October 15, 2024. Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1139648 10/11/2024 Order Conditions The discharge of untreated process water from Sediment Trap 3 affected water qua Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1139647 10/15/2024 Deficient Monitoring The discharge observed on October 11, 2024, continued through October 15, 2024. Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1139646 10/15/2024 Deficient Monitoring The discharge observed on October 11, 2024, continued through October 15, 2024. Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1139645 11/25/2024 Deficient Monitoring On November 25, SCQ collected an acute toxicity sample at EFF-004, which followe Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1139643 02/01/2024 CAT1 Settleable Solids Daily Maximum limit is 1 ml/L/hr and reported value was 3 ml/L Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1139640 10/11/2024 Order Conditions An unauthorized discharge of untreated process water from Sediment Trap 3 at Dis Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1139639 10/11/2024 Deficient Monitoring An unauthorized discharge of untreated process water from Sediment Trap 3 at Dis Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1139638 10/15/2024 Deficient Monitoring The discharge observed on October 11, 2024, continued through October 15, 2024. Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1139195 12/16/2024 ATOX Acute Toxicity-Fathead Minnow-survival Instantaneous Minimum limit is 70 % survi Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1139194 12/31/2024 CAT2 Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 40 ug/L a Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1139193 12/16/2024 CAT2 Chromium (VI) Daily Maximum limit is 16 ug/L and reported value was 40 ug/L at E Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1138254 11/30/2024 CAT2 Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 7.6 ug/L Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1125371 02/01/2024 Surface Water Exceedance of R2-2021-0010, Section V. Turbidity, Instantaneous Maximum limit is Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1125370 02/29/2024 CAT2 Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 9.8 ug/L Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1124651 01/22/2024 Surface Water Exceedance of R2-2021-0010, Section V. Turbidity, Instantaneous Maximum limit is Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1124650 01/22/2024 Surface Water Exceedance of R2-2021-0010, Section V. Turbidity, Instantaneous Maximum limit is Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1124649 01/31/2024 CAT2 Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 9.8 ug/L Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1123574 12/18/2023 Deficient Monitoring Exceedance of R2-2021-0010, Section V. SCQ did not sample for Dissolved Oxygen i Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1123573 01/05/2023 Surface Water Exceedance of R2-2021-0010, Section V. pH, Instantaneous Maximum limit is <6.5; Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1123572 01/05/2023 Surface Water Exceedance of R2-2021-0010, Section V. Turbidity, Instantaneous Maximum limit is Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1123571 12/18/2023 Deficient Monitoring Exceedance of R2-2021-0010, Section V. SCQ did not sample for Dissolved Oxygen i Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1123570 12/18/2023 Surface Water Exceedance of R2-2021-0010, Section V. Turbidity, Instantaneous Maximum limit is Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1123569 12/18/2023 Deficient Monitoring Exceedance of R2-2021-0010, Section V. SCQ did not sample for Dissolved Oxygen i Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1123568 12/18/2023 Deficient Monitoring Exceedance of R2-2021-0010, Section V. SCQ did not sample for Dissolved Oxygen i Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1123381 12/18/2023 Deficient Monitoring Exceedance of R2-2021-0010, Section V. SCQ did not sample for Dissolved Oxygen i Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1123380 12/18/2023 Deficient Monitoring Exceedance of R2-2021-0010, Section V. SCQ did not sample for Dissolved Oxygen i Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1123379 12/18/2023 Deficient Monitoring Exceedance of R2-2021-0010, Section V. SCQ did not sample for Dissolved Oxygen i Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1123378 12/18/2023 Surface Water Exceedance of R2-2021-0010, Section V. Turbidity, Instantaneous Maximum limit is Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1123377 12/31/2023 CAT2 Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 7.3 ug/L Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1123376 12/18/2023 Deficient Monitoring Exceedance of R2-2021-0010, Section V. SCQ did not sample for Dissolved Oxygen i Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1115052 02/28/2023 CAT2 Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 5.9 ug/L Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1114162 01/09/2023 OEV pH Instantaneous Maximum limit is 8.5 SU and reported value was 8.93 SU at EFF-0 Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 N
1114161 01/05/2023 CAT2 Copper, Total Daily Maximum limit is 34 ug/L and reported value was 65 ug/L at E Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1114160 01/09/2023 OEV pH Instantaneous Maximum limit is 8.5 SU and reported value was 8.93 SU at EFF-0 Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1114159 01/31/2023 CAT2 Lead, Total Monthly Average limit is 8.1 ug/L and reported value was 16 ug/L at Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1114158 01/05/2023 OEV pH Instantaneous Maximum limit is 8.5 SU and reported value was 8.75 SU at EFF-0 Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1114157 01/31/2023 CAT2 Copper, Total Monthly Average limit is 14 ug/L and reported value was 65 ug/L at Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1114156 01/31/2023 CAT2 Nickel, Total Monthly Average limit is 93 ug/L and reported value was 130 ug/L a Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1103740 03/28/2022 CAT2 Copper, Total Daily Maximum limit is 34 ug/L and reported value was 43 ug/L at E Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1103739 03/31/2022 CAT2 Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 26 ug/L a Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1103738 03/28/2022 CAT2 Chromium (VI) Daily Maximum limit is 16 ug/L and reported value was 26 ug/L at E Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1103737 03/31/2022 CAT2 Copper, Total Monthly Average limit is 14 ug/L and reported value was 43 ug/L at Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1103736 03/31/2022 CAT2 Copper, Total Monthly Average limit is 14 ug/L and reported value was 23 ug/L at Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1099665 12/31/2021 CAT2 Nickel, Total Monthly Average limit is 93 ug/L and reported value was 120 ug/L a Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1099664 12/31/2021 CAT2 Lead, Total Monthly Average limit is 8.1 ug/L and reported value was 9.6 ug/L at Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1099663 12/31/2021 CAT2 Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 12 ug/L a Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1099662 12/31/2021 CAT2 Lead, Total Monthly Average limit is 8.1 ug/L and reported value was 13 ug/L at Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1099661 12/13/2021 CAT2 Chromium (VI) Daily Maximum limit is 16 ug/L and reported value was 26 ug/L at E Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1099660 12/13/2021 CAT2 Copper, Total Daily Maximum limit is 34 ug/L and reported value was 46 ug/L at E Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1099659 12/31/2021 CAT2 Copper, Total Monthly Average limit is 14 ug/L and reported value was 46 ug/L at Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1099658 12/13/2021 CAT2 Copper, Total Daily Maximum limit is 34 ug/L and reported value was 76 ug/L at E Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1099657 12/31/2021 CAT2 Copper, Total Monthly Average limit is 14 ug/L and reported value was 76 ug/L at Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1099656 12/31/2021 CAT2 Chromium (VI) Monthly Average limit is 5.6 ug/L and reported value was 26 ug/L a Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
1099649 10/31/2021 CAT2 Copper, Total Monthly Average limit is 14 ug/L and reported value was 25 ug/L at Violation N eSMR Stevens Creek Quarry 443276 R2-2021-0010 Y
Report currently showing last five years of violations. Click here to return to viewing one year of violations. Refer to the Interactive Violation Report for more data.
Total Violations: 59
*Click the "(+/-) Violation Description" link to expand and contract the violation description.
  
  
  
  
Expand/Contract Enforcement Actions
Enforcement Actions
Enforcement ID Enforcement Type Enf. Order No. Title Program Effective Date Status
444599 Cease and Desist Order R2-2021-0011 Cease and Desist Order R2-2021-0011 for Cupertino Quarry (Stevens Creek Quarry, Inc.) NPDMINING 07/01/2021 Active
Total Enforcement Actions: 1
  
  
  
  
Expand/Contract Enforcement Actions
Regulatory Measures linked to Related Parties
Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status
Total Regulatory Measures linked to Related Parties: 0
  
  

The current report was generated with data as of: 10/31/2025