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   Party At-A-Glance Report

  
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General Information
Party ID Party Name Party Classification Mailing Address Work Phone Email/Website
37564 Cemex Construction Materials Pacific LLC Privately-Owned Business 1544 Stanley Boulevard Pleasanton, CA 94566 925-426-2261 None
  
  
  
  
Expand/Contract Related Places
Related Places
Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date
252950 DeSilva Gates Aggregates Alameda 2 Sand and Gravel Mining None None None
237327 CEMEX Construction Materials Pacific, LLC ELIOT Site Alameda 2 Sand and Gravel Mining Owner 01/16/1985 None
Total Related Places: 2
  
  
  
  
Expand/Contract Related Parties
Related Parties
Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification
Total Related Parties: 0
  
  
  
  
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?
402857 Enrollee - NPDES 2 2 019135005 Active NPDNONMUNIPRCS R2-2020-0028 09/15/2015 None Discharger 09/15/2015 None N
179977 Enrollee 2 2 019135002 Historical NPDNONMUNIPRCS R2-2008-0011 06/26/2008 12/01/2011 Discharger 09/01/2005 None N
179976 Enrollee 2 2 019135001 Historical NPDNONMUNIPRCS R2-2008-0011 06/26/2008 09/14/2015 Discharger 09/01/2005 None N
146601 NPDES Permit 2 2 019135001 Historical NPDMINING 85-003 01/16/1985 None Discharger 01/16/1985 None N
143340 NPDES Permit 2 2 019135002 Historical NPDMINING 94-095 08/17/1994 05/21/2003 Discharger 08/17/1994 None N
142417 NPDES Permit 2 2 019135001 Historical NPDMINING 96-045 04/17/1996 05/20/2003 Discharger 04/17/1996 None N
141901 NPDES Permit 2 2 019135001 Historical NPDMINING 91-036 03/20/1991 None Discharger 03/20/1991 None N
132631 NPDES Permit 2 2 019135001 Historical NPDMINING R2-2003-0046 05/21/2003 05/21/2003 Discharger 05/21/2003 None N
132630 NPDES Permit 2 2 019135002 Historical NPDMINING R2-2003-0045 05/21/2003 05/21/2003 Discharger 05/21/2003 None N
Total Regulatory Measures: 9
  
  
  
  
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.
1144020 04/30/2025 Late Report The 2025 first quarter SMR was due on April 30 and was submitted on May 5, 2025, following a reminder email from Alessandra Moyer to Erin Cervantes. It was a report of no discharge. Violation None Report CEMEX Construction Materials Pacific, LLC ELIOT Site 402857 R2-2020-0028 N
1127802 05/01/2024 Late Report First quarter report was due April 30, 2024. Submitted May 14, 2024. Violation None Report CEMEX Construction Materials Pacific, LLC ELIOT Site 402857 R2-2020-0028 N
1124788 02/15/2024 Deficient Reporting 2023 Annual Report did not contain information about violations that occurred in 2023, including unauthorized discharge in January, or late Q2, Q3, Q4, and Annual reports. Report did not include a comprehensive discussion of performance and compliance, summaries of monitoring data, wastewater facilities review and evaluation status report, annual O&MM review status report, or annual BMP Plan evaluation. Violation None Report CEMEX Construction Materials Pacific, LLC ELIOT Site 402857 R2-2020-0028 Y
1124787 02/16/2024 Late Report 2023 Annual Report was due on February 15, 2024, but was not submitted until February 29, 2024, after multiple email reminders. Violation None Report CEMEX Construction Materials Pacific, LLC ELIOT Site 402857 R2-2020-0028 Y
1124786 01/31/2024 Late Report Q4 2023 report was due January 30, 2024, but was not submitted until February 29, 2024, after multiple reminder emails. Violation None Report CEMEX Construction Materials Pacific, LLC ELIOT Site 402857 R2-2020-0028 N
1122363 10/30/2023 Late Report Quarter 3 (2023) report was due on October 30,2023, and was submitted on November 7, 2023. This is not an MMP-able violation because it is a no-discharge report. Violation N Report CEMEX Construction Materials Pacific, LLC ELIOT Site 402857 R2-2020-0028 N
1119824 07/31/2023 Late Report 2023 Q2 SMR was due on July 31, 2023, but was received on September 5, 2023. It was a report of no discharge. Violation None Report CEMEX Construction Materials Pacific, LLC ELIOT Site 402857 R2-2020-0028 Y
1119769 01/12/2023 Unauthorized Discharge According to a report from CEMEX, due to an atmospheric river and related releases from the Del Valle Dam, the Arroyo Del Valle breached Lake A at the southeast corner on 1/12/2023. CEMEX staff conducted a site visit on 1/20/23, at which time they discovered that Lake A had breached the southwest corner of the lake, creating a "pass-through (outlet)" for flows. Both breaches were approximately 50 feet wide. There were also erosional escarpments to the east of the primary breach. According to CEMEX, mining has not occurred at Lake A for the past 10 years. Violation None Report CEMEX Construction Materials Pacific, LLC ELIOT Site 402857 R2-2020-0028 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: 8
*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
456092 Oral Communication None Oral Com 03/05/2024 for Cemex Construction Materials Pacific LLC NPDNONMUNIPRCS 03/05/2024 Historical
454195 Oral Communication None Oral Com 01/24/2023 for Cemex Construction Materials Pacific LLC NPDNONMUNIPRCS 01/24/2023 Historical
454194 Oral Communication None Oral Com 08/31/2023 for Cemex Construction Materials Pacific LLC NPDNONMUNIPRCS 08/31/2023 Historical
398756 Admin Civil Liability R2-2015-1006 ACL R2-2015-1006 for Cemex Construction Materials Pacific LLC NPDNONMUNIPRCS 05/12/2015 Historical
398073 Admin Civil Liability R2-2015-1001 ACL R2-2015-1001 for Cemex Construction Materials Pacific LLC NPDNONMUNIPRCS 01/15/2015 Historical
372550 Oral Communication None Oral Com for Cemex Construction Materials Pacific LLC NPDNONMUNIPRCS None Historical
Total Enforcement Actions: 6
  
  
  
  
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: 05/21/2026
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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