• Aerodynamic Plating Co., Inc.
• Aerojet, Chino Hills
• Alcoa Fastening Systems
• American Metal Processing, Inc.
• Anthony International (formerly Anthony Manufacturing Inc.)
• Associated Plating Company
• Baxter Court Properties
• Bio-Rad Laboratories, Inc.
• Bowers Manufacturing, Corporation
• Bronze-Way Plating Corporation
• Bumperline
• CalEnergy Operating Corporation
• Carpenter Special Products Corporation
• Chevron USA Inc. Richmond Refinery
• Circuit Link, Inc.
• Coastal Multichrome, Inc.
• Cognis Corporation
• Composite Optics, Inc.
• Connector Service Corporation
• Crown City Plating Company
• Delphi Automotive Systems Corporation
• Delru/Rigid-Flex, Incorporated
• EEMUS Manufacturing Corporation
• Electro-Forming Company, Inc.
• Foss Plating Company
• General Inspection Laboratories, Inc.
• Graybill Metal Polishing, Inc., aka American Electro-Plating Co.
• Hallmark Circuits, Inc.
• Hartwell Corporation
• Henkel Corporation
• Hitachi Chemical Diagnostics, Inc.
• Hixson Metal Finishing
• Imperial Irrigation District (All American Canal Facility)
• Imperial Irrigation District (South Alamo Facility)
• Islander Extremes
• J&H Deburring, Inc.
• JMP Plating, Inc.
• Johnson Controls Battery Group, Inc.
• Joslyn Sunbank Company, LLC
• Kotoff and Company, Inc.
• Leach International
• Lebata, Inc. (former James Lee Record Processing)
• Linfinity Microelectronics, Inc.
• Long Beach Generation, LLC Power Generating Station
• M.V.S., Inc.
• Metal Coaters of California
• Microsemi Corporation
• Modern Plating Company
• Pacific Steel Inc.
• Palace Plating
• PCA Industries, LLC, dba PCA Metal Finishing, Incorporated
• Perfection Plating
• PG&E Diablo Canyon Power Plant
• Prime Wheel Corporation (Harbor City)
• Printronix, Incorporated
• SDC Circuits, Inc.
• Specification Chrome
• Steelscape, Inc.
• Stevens Metal Finishing
• STMicroelectronics, Inc.
• Toppan Electronics, Inc.
• Tri City Plating, Inc.
• Trident Plating, Inc. (Commerce)
• Trojan Battery Company
• Tyco Electronics – Field Avenue, Stockton (former)
• Tyco Electronics Corporation – Fremont Street, Stockton
• West Contra Costa Sanitary Landfill, Inc
• Western Plating
• Wilson Street Corporation