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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
S50914 William Lyon Homes San Ramon Privately-Owned Business 2603 Camino Ramon Ste 150 San Ramon, CA 94583 N/A N/A
  
  
  
  
Expand/Contract Related Places
Related Places
Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date
S621234 North Baseline & Almeria San Bernardino 8 Facility Discharger 03/06/1998 None
S614088 Baton Rouge Townhomes Santa Clara 2 Facility Discharger 12/19/2005 None
S613539 Subdivision 8448 Vista Del Mar Contra Costa 2 Facility Discharger 05/16/2005 None
S603880 Walnut Blvd Contra Costa 5S Facility Discharger 07/14/1998 None
S271141 Victoria By Bay P2 P3 Contra Costa 2 Facility Discharger 09/01/2005 None
S263497 THE RANCH ON SILVER CREEK Santa Clara 2 Facility Discharger 08/10/2011 None
S261855 Springfield Rnch El Dorado 5S Facility Discharger 09/01/2005 None
S238870 Lyon Seasons At Silverado Stanislaus 5S Facility Discharger 09/01/2005 None
S238197 Legends Contra Costa 5S Facility Discharger 09/01/2005 None
S211165 Bay Side & Sycamore Ave Ext Contra Costa 2 Facility Discharger 09/01/2005 None
S201207 Thomas Rnch Contra Costa 2 Facility Discharger 09/01/2005 None
S201206 5277 Crow Canyon Rd Alameda 2 Facility Discharger 09/01/2005 None
S201205 Columbus Pkwy Solano 2 Facility Discharger 09/01/2005 None
Total Related Places: 13
  
  
  
  
Expand/Contract Related Parties
Related Parties
Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification
N/A Ron Foust Contact Owner Contact N/A N/A N/A
N/A Alan Uman Contact Owner Contact N/A N/A N/A
N/A Scott Jones Contact Owner Contact N/A N/A N/A
N/A Dan Benavidez Contact Owner Contact N/A N/A N/A
N/A Sparky Greco Contact Owner Contact N/A N/A N/A
N/A Mark Berch Contact Owner Contact N/A N/A N/A
N/A Mike Squier Contact Owner Contact N/A N/A N/A
Total Related Parties: 7
  
  
  
  
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?
Total Regulatory Measures: 0
  
  
  
  
Expand/Contract Violations
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.
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: 0
*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
S246493 Notice to Comply UNKNOWN 2 07C318044 CONSTW 12/23/2002 Active
S243031 Notice of Violation None 5S09C315773 CONSTW 05/01/2003 Historical
S241142 Notice to Comply None 2 07C318044 CONSTW 03/13/2002 Active
S240715 Notice to Comply None 2 07C318044 CONSTW 01/26/2002 Active
S239616 Notice to Comply None 2 07C318044 CONSTW 01/28/2002 Active
S227564 13267 Letter/Order UNKNOWN 2 48C309644 CONSTW 07/26/1999 Historical
S226353 13267 Letter/Order UNKNOWN 2 07C311474 CONSTW 08/15/2000 Historical
S226352 Staff Enforcement Letter UNKNOWN 2 07C311474 CONSTW 11/22/2000 Historical
S226321 Notice of Violation UNKNOWN 2 01C309690 CONSTW 08/16/1999 Historical
S226320 13267 Letter/Order UNKNOWN 2 01C309690 CONSTW 07/26/1999 Historical
S225207 Notice of Violation UNKNOWN 2 48C309644 CONSTW 11/16/1999 Historical
Total Enforcement Actions: 11
  
  
  
  
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: 04/23/2026
Regional Boards are in the process of entering backlogged data.
As a result, data may be incomplete.
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