- Alcan Aluminum
- Alcoa (Stolle-Wiebe Div.)
- Allied Signal
- Ambar Chemical
- Aqua Design
- Aquatech Systems
- Bain
- Calgon Carbon Corp.
- Caribbean Utility Co.
- Cascade Separations/Bend Research
- Church & Dwight
- Citicorp
- Conversion Technologies
- Degussa Chemical
- Eltech/Eltech Research
- Freudenberg
- General Chemical
- Givaudan-Roure
- Great Lakes Chemical
- Graver Chemical
- Guarantee Electric/GISMO
- Hi-Tech Environmental
- Hoechst-Celanese
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- Infilco Degremont
- Kaneka Pharma
- Komline-Sanderson
- KPMG
- Magruder Radiant
- Membrane Systems
- Membrex
- Octagon Inc.
- Oremet-Wah Chang
- PQ Corporation
- Princess Hotels
- Purity Systems, Inc.
- Royal Oasis Golf Resort and Casino
- Rhone-Poulenc
- Ruska Instruments
- Silicone Derivatives
- Smith & Loveless
- Solar Dynamics, Ltd.
- Technologica Aplicada en Fluidos, SA de CV
- VanCamp Tuna
- West Indies Home Contractors
- Zumtobel-Staff Lighting
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