EPA v. CalMat-Shamrock UAO-Industrial SW
Case summary
One of two unilateral orders to Vulcan Materials Company, Inc. and CalMat Co. for violations of the California Industrial General Permit at six facilities in California. The orders require Vulcan Materials Company, Inc. and CalMat Co. to develop corrective action plans for each facility to better manage industrial stormwater, prevent unauthorized discharges of wastewater, and comply with monitoring and sampling requirements. This order addresses violations at the CalMat/Shamrock Materials facility in San Rafael.
Defendants (1)
- CalMat Co.Named in complaintNamed in settlement
Facilities (1)
SHAMROCK MATERIALS INC
548 DU BOIS ST, SAN RAFAEL, CA, 94901
Registry ID: 110033012460
Statutes cited
- CWA 301/402 — NPDES Permit Violations
Enforcement conclusions (1)
CalMat-Shamrock UAO-Industrial SWentered 2026-05-18
Primary law: CWA
Timeline (3 milestones)
- 2026-05-18Complaint Filed/Proposed Order
- 2026-05-18Final Order Issued
- 2026-05-29Enforcement Action Data Entered
Case metadata
- EPA activity ID
- 3604956404
- Case number
- 09-2026-1505
- Lead agency
- EPA
- EPA region
- 09
- Voluntary self-disclosure
- No
- Primary statute
- NPDES Permit Violations
Sourced verbatim from EPA ECHO Enforcement Case Report for case 09-2026-1505 . Bulk data: ICIS-FEC download summary.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.