California Integrated Water Quality System (CIWQS 100.0) - Build Number: mainTrunk.mm.dd.yyyy.1


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	California Integrated Water Quality System Project (CIWQS)

Party At-A-Glance Report

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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

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

Related Parties

Party ID	Party Name	Party Type	Role/Relationship	Relationship Start Date	Relationship End Date	Classification
656142	Emily Meyers	Person	Data Submitter	07/16/2026	None	None
656139	Kendi Only	Person	Data Submitter	07/16/2026	None	None
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: 8

Regulatory Measures (non-enforcement)

Reg. Measure ID

Regulatory Measure Type

Relationship Start Date

Relationship End Date

Amended?

443276

NPDES Permit

2 43I006687

Active

NPDMINING

R2-2021-0010

07/01/2021

None

Discharger

05/12/2021

None

Total Regulatory Measures: 1

Violations within the past year

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.
1156543	06/30/2026	Deficient Monitoring	SCQ generally met the monitoring requirements under R2-2021-0010 during the second quarter; however, one requirement for Cyanide was not completed between April 1 and June 30, although samples were collected on April 7. Samples collected on April 7, 2026, show that SCQ met all other monitoring requirements.	Violation	N	eSMR	Stevens Creek Quarry	443276	R2-2021-0010	N
1156542	02/17/2026	CAT1	Settleable Solids Maximum Daily (MDEL) limit is 1 ml/L/hr and reported value was 3.5 ml/L/hr at EFF-004.	Violation	N	eSMR	Stevens Creek Quarry	443276	R2-2021-0010	N
1151720	01/02/2026	Surface Water	Exceedance of R2-2021-0010, Section V.B.3. pH, Instantaneous Maximum limit is 8.5 S.U., and the reported value was 8.51 S.U.	Violation	N	eSMR	Stevens Creek Quarry	443276	R2-2021-0010	N
1151719	01/02/2026	CAT2	Chromium (VI) Monthly Average (Mean) limit is 5.6 ug/L and reported value was 13 ug/L at EFF-004.	Violation	N	eSMR	Stevens Creek Quarry	443276	R2-2021-0010	N
Report defaults to display violations within the last year. Click here to see last five years of violations. Refer to the Interactive Violation Report for more data.

Total Violations: 4

*Click the "(+/-) Violation Description" link to expand and contract the violation description.

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

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: 07/23/2026
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.

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