General Information Party ID Party Name Party Classification Mailing Address Work Phone Email/Website S604743 William Lyon Homes Privately-Owned Business 4000 Executive Parkway Suite 250 Suite 150 San Ramon, CA 94583 925-543-5531 scott.jones@lyonhomes.com Related Places Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date S819589 Vineyard II Contra Costa 2 Facility Discharger 10/04/2012 null S813373 Mayfield Santa Clara 2 Facility Discharger 11/01/2011 null S802045 Rancho Hills Deer Park Santa Clara 3 Facility Discharger 02/17/2010 null S802038 Hidden Glen Contra Costa 5S Facility Discharger 02/17/2010 null S802031 Paradise Valley Area K Solano 2 Facility Discharger 02/17/2010 null S801434 Magnolia Lane Sacramento 5S Facility Discharger 12/30/2009 null S800442 Ranch at Mossdale Landing San Joaquin 5S Facility Discharger 10/22/2009 null S608686 Whitney Ranch Villages 27 & 28 Placer 5S Facility Discharger 05/19/2005 null Related Parties Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification N/A Samuel Spier Contact Owner Contact null null null N/A Kurt Nunnenkamp Contact Owner Contact null null null N/A Scott Jones Contact Owner Contact null null null Regulatory Measures(non-enforcement) Reg. Measure ID Regulatory Measure Type Region WDID Title Status Program Order No. RM Effective Date RM Termination Date Relationship Relationship Start Date Relationship End Date Violations within the past calendar 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. Enforcement Actions Enforcement ID Enforcement Type Enf. Order No. Title Program Effective Date Status S405825 Notice of Violation null 2 48C357438 CONSTW 06/17/2011 Active Regulatory Measures linked to Related Parties Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status