General Information Party ID Party Name Party Classification Mailing Address Work Phone Email/Website 400476 SUMCO Phoenix Corporation Privately-Owned Business 19801 North Tatum Boulevard Phoenix, AZ 85050 480-473-6503(+) jeff.bradshaw@sumcousa.com Related Places Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date 658012 Former 401 National Avenue, Middlefield-Ellis-Whisman (MEW) Study Area Santa Clara 2 Service/Commercial Site, NEC Owner 10/19/2016 null Related Parties Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification 643536 Rafael Velazquez Person Legally Responsible Official 02/02/2024 null null 464856 Geomatrix Consultants (Oakland) Organization Contracted With 04/09/2008 null Privately-Owned Business 464864 Greg Hedger Person Employee 04/01/2008 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 397967 Enrollee - NPDES 2 2 438632002 Enrollee 401 National Ave for Sumco Phoenix Corporation Active NPDNONMUNIPRCS R2-2017-0048 08/25/2014 null Discharger 09/05/2014 null 372729 Enrollee 2 2 438632001 Enrollee-NPDES CAG912003, 401 National Ave, SUMCO MEW Study 2 438632001 Historical NPDNONMUNIPRCS R2-2009-0059 11/17/2009 08/24/2014 Discharger 09/25/2007 null 332662 Enrollee 2 2 438632001 Enrollee-NPDES CAG912003, for SUMCO 401 National Ave, Mt. View (2 438632001) Historical NPDNONMUNIPRCS R2-2004-0055 11/29/2004 11/16/2009 Discharger 09/25/2007 null 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 455219 Admin Civil Liability R2-2024-1013 ACL R2-2024-1013 for SUMCO Phoenix Corporation NPDNONMUNIPRCS 03/05/2024 Historical 442195 Admin Civil Liability R2-2021-1017 ACL R2-2021-1017 for SUMCO Phoenix Corporation NPDNONMUNIPRCS 06/03/2021 Historical Regulatory Measures linked to Related Parties Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status