- 1223 Batavia Street LLC
- Acme
- Aerojet, Rancho Cordova
- Ambitech, Inc.
- American Recovery
- Blue Hills Disposal Facility
- BP Carson Refinery
- Bronze-Way Plating Corporation
- Chemical Waste Management, Inc. - Kettleman Hills Facility
- Chevron USA Inc. Richmond Refinery
- Chrome Tech, Inc.
- Clean Harbors of San Jose, LLC
- ConocoPhillips Wilmington Refinery
- Contraves, Inc. (Formerly Unaxis Materials, Inc.)
- Delphi Automotive Systems Corporation
- DeMenno-Kerdoon
- Deutsch Engineered Connecting Devices
- Dow Chemical Company Torrance
- Eurodesign Cabinets, Inc.
- Fineline Circuits and Technology
- Forward Landfill
- Gardena Specialized Processing, Inc.
- General Atomics
- General Environmental Management of Rancho Cordova LLC
- Gibson Environmental, Bakersfield Facility
- Golden Natural Company
- Graybill Metal Polishing, Inc., aka American Electro-Plating Co.
- Hallmark Circuits, Inc.
- Hitachi Chemical Diagnostics, Inc.
- Home Depot, U.S.A., Inc., a Delaware Corporation
- International Light Metals (ILM) Facility, Lockheed Martin Corporation
- IT Corporation Vine Hill Complex
- IT Panoche
- John Smith Road Landfill
- L-3 Communications Corporation
- Lawrence Berkeley National Laboratory
- Lawrence Livermore National Laboratory
- Leach International
- Lodi Chrome, dba Reggie Mason
- McCormick Selph Inc. (formerly Allegheny Teledyne, Inc.)
- Mercury Recovery Services
- Monitor Polishing and Plating, Inc.
- Naval Air Station North Island (NASNI)
- Naval Air Weapons Station
- Pacific Aerospace Inc.
- Pacific Plating
- Palace Plating
- PCA Industries, LLC, dba PCA Metal Finishing, Incorporated
- PG&E Diablo Canyon Power Plant
- Phibro-Tech Inc.
- Rhodia, Inc.
- Romic Environmental Technologies Corporation
- Safety-Kleen Rancho Cordova
- San Diego Gas and Electric - Miramar
- San Onofre Nuclear Generating Station (SONGS)
- Sandia National Laboratories
- Santa Ana Plating
- Santa Susana Field Laboratory
- Statewide Environmental Services (SES)
- Superior Processing, A California Corporation
- T N & Associates, Inc.
- Trident Plating, Inc.
- United Technologies Corporation, Pratt and Whitney Space Propulsion
- USS-POSCO Industries
- West Contra Costa Sanitary Landfill, Inc
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