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California Integrated Water Quality System Project (CIWQS)
   Facility At-A-Glance Report

  
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Place ID 252950 		  
  
  
  
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General Information
Region Place ID Place Name Place Type Place Address Place County
2 252950 DeSilva Gates Aggregates Sand and Gravel Mining 6527 Calaveras Sunol, CA, 94586 Alameda
Expand/Contract Related Parties
Related Parties
Party Party Type Party Name Role Classification Relationship Start Date Relationship End Date
629893 Person Alessandra Moyer Case Worker 12/16/2021
138473 Person Farhad Azimzadeh Case Worker 11/16/2016 04/12/2017
560543 Person Alan French Is Onsite Manager For 11/14/2016
32568 Organization Oliver De Silva, Inc Owner and Operator Privately-Owned Business 08/22/2014
139389 Person Lourdes Gonzales Case Worker 02/18/2009 12/13/2022
137758 Organization San Francisco Bay Regional Water Quality Control Board Regulating Waterboard 06/28/2007
115901 Person Louis Schipper Contact 06/17/2005 11/14/2016
Total Related Parties: 7
Expand/Contract Regulatory Measures
Regulatory Measures
Reg Measure ID Reg Measure Type Region Program Order No. WDID Effective Date Expiration Date Status Amended?
410097 Enrollee - NPDES 2 NPDMINING R2-2020-0028 2 019135003 11/14/2016 12/31/2025 Active N
382333 Enrollee 2 NPDNONMUNIPRCS R2-2008-0011 2 019135003 12/01/2011 Historical N
179977 Enrollee 2 NPDNONMUNIPRCS R2-2008-0011 2 019135002 06/26/2008 04/30/2013 Historical N
132630 NPDES Permit 2 NPDMINING R2-2003-0045 2 019135002 05/21/2003 05/21/2003 Historical N
143340 NPDES Permit 2 NPDMINING 94-095 2 019135002 08/17/1994 08/17/1999 Historical N
Total Reg Measures: 5
Expand/Contract Violations
Violations
Violation ID Occurred Date Violation Type (-) Violation Description Corrective Action Status Classification Source
1124327 12/31/2023 DMON Monthly monitoring of receiving water (Alameda Creek, upstream and downstream) missed for November and December 2023. Violation B Report
1119823 01/31/2023 DMON From January 1, 2023, to January 31, 2023, DGA did not monitor for turbidity, hardness, or salinity in either upstream or downstream receiving water (Alameda Creek). The permit requires monitoring once a month for each of those constituents at upstream and downstream locations. According to its Q1 SMR, DGA has improved sample tracking system and is now conducting its own sampling for some constituents to prevent future missed sampling events. DGA has purchased field instruments and provided staff with instrument training. Violation B Report
1111211 09/30/2022 DMON During the period of January 1, 2022, through September 30, 2022, the Discharger failed to report 42 required data points. The missed/unreported monitoring was not acknowledged via 24-hr reports, 5-day reports, or in the transmittal letters of relevant SMRs. Violation B Report
1111203 09/02/2022 Other Water Code Sections Violation of 13383 Order sent July 8, 2022, requiring Discharger to investigate the source of previously reported chlorine in its discharge and report the results of the investigation, including a substantiated determination of source, by September 2, 2022. Discharger was also required to correct previous reporting errors and to provide comprehensive table of total residual chlorine data with required metadata. Discharger failed to report steps taken to investigate source of chlorine, did not correct previous reporting errors, and did not provide all required metadata with chlorine data. Violation B Report
1111245 08/18/2022 DMON The Discharger failed to perform accelerated monitoring after an August 17, 2022, exceedance of the effluent limitation for settleable solids. Violation B Report
1111216 08/17/2022 CAT1 Settleable Solids Daily Maximum limit is 0.2 ml/L/hr and reported value was 0.3 ml/L/hr. Violation B Report
1111246 02/15/2022 Deficient Reporting The Discharger’s 2021 Annual Report lacked the items required by the Order in Attachment E §§ VII.B.2.b.ii-vi. Violation B Report
1073865 10/31/2019 LREP The 2019 3rd quarter report was submitted late. Violation B Report
1061878 05/17/2019 OEV Turbidity Daily Maximum limit is 40 NTU and reported value was 53.4 NTU. Violation B Report
Report displays most recent five years of violations. Refer to the Interactive Violation Report for more data.
Total Violations: 9 Priority Violations: 0
*Click the "(+/-) Violation Description" link to expand and contract the violation description.
*As of 5/20/2010, the Water Board's Enforcement Policy requires that all violations be classified as 1, 2 or 3, with class 1 being the highest. Prior to this, violations were simply classified as Yes or No. If a 123 classification has been assigned to a violation that occurred before this date, that classification data will be displayed instead of the Yes/No data.
Violation Types
CAT1 = Category 1 Pollutant (Effluent Violation for Group 1 Pollutant) DMON = Deficient Monitoring
Deficient Reporting = Deficient Reporting LREP = Late Report
OEV = Other Effluent Violation Other Water Code Sections = Other Water Code Sections
Expand/Contract Enforcement Actions
Enforcement Actions
Enf Id Enf Type Enf Order No. Effective Date Status
372550 Oral Communication Historical
455321 Admin Civil Liability R2-2024-1027 03/05/2024 Historical
450495 Notice of Violation 12/09/2022 Historical
398073 Admin Civil Liability R2-2015-1001 01/15/2015 Historical
Total Enf Actions: 4
Expand/Contract Inspections
Inspections
Inspection ID Inspection Type Lead Inspector Actual End Date Planned Violations Attachment
32059640 Miscellaneous inspection Jack Gregg 02/14/2018 N 0 N/A
18602627 B Type compliance inspection Farhad Azimzadeh 08/19/2014 N 0 N/A
291331 B Type compliance inspection Jenny Chen 12/18/2001 Y 0 N/A
291330 B Type compliance inspection James Nusrala 04/18/2000 Y 0 N/A
291328 B Type compliance inspection Vijay Patel 08/21/1998 Y 0 N/A
291329 B Type compliance inspection Vijay Patel 08/15/1996 Y 0 N/A
Total Inspections: 6 Last Inspection: 02/14/2018
  
The current report was generated with data as of: 05/17/2024
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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