- American Cyanamid- American Cyanamid

- Americhem- Americhem

- Ameron- Ameron

- Amoco Petroleum Products- Amoco Petroleum Products

- Anderson Laboratories

- APV Crepasco, Inc.- APV Crepasco, Inc.

- Archadian Corporation- Archadian Corporation

- Atlantic Richfield Company- Atlantic Richfield Company

- Arizona Instrument Corp.- Arizona Instrument Corp.

- Bemis Corporation- Bemis Corporation

- Bennett Pump Company- Bennett Pump Company

- Brenntag Interchem- Brenntag Interchem

- British Petroleum- British Petroleum

- Calgon Carbon- Calgon Carbon

- CECO Filters- CECO Filters

- Cenex- Cenex

- Chemet Corporation- Chemet Corporation

- Chevron Corp.- Chevron Corp.

- Circle K

- Clark Refining & Marketing- Clark Refining & Marketing

- Comdata Corporation- Comdata Corporation

- Danaher Corporation- Danaher Corporation

- Dayco Products Inc.- Dayco Products Inc.

- Dionex Corporation- Dionex Corporation

- Dover Corporation- Dover Corporation

- EBW Inc.- EBW Inc.

- Equilon Enterprises, LLC.

- EMCO Electronics- EMCO Electronics

- EMCO Wheaton Inc.- EMCO Wheaton Inc.

- Exxon Co. USA- Exxon Co. USA

- Ford Motor Company- Ford Motor Company

- Fuelman/Gascard- Fuelman/Gascard

- HCH Marketing- HCH Marketing

- Honda- Honda

- Husky- Husky

- IAES- IAES

- ISCO, Environmental Division- ISCO, Environmental Division

- J. J. Keller & Associates, Inc.- J. J. Keller & Associates, Inc.

- Kohler Company- Kohler Company

- Kohler de Mexico- Kohler de Mexico

- Label Resources- Label Resources

- LaRoche Industries- LaRoche Industries

- Lima Register- Lima Register

- Liquid Container LP- Liquid Container LP

- MacArthur Petroleum- MacArthur Petroleum

- MACtac Canada LTD/LTEE- MACtac Canada LTD/LTEE

- Mallory Controls- Mallory Controls

- Mapco, Inc.- Mapco, Inc.

- Marley Pump- Marley Pump

- McGean-Rohco, Inc.- McGean-Rohco, Inc.

- Midwest HealthCare Network- Midwest HealthCare Network

- Milcor Incorporated- Milcor Incorporated

- Mobil Oil Corp- Mobil Oil Corp

- Mobile Water Technology- Mobile Water Technology

- Morgan Adhesives Company- Morgan Adhesives Company

- Nederman Inc.- Nederman Inc.

- Nitron Chemical Corp.- Nitron Chemical Corp.

- Omega Environmental, Inc.- Omega Environmental, Inc.

- Omnicare, Inc.- Omnicare, Inc.

- OPW, Inc.- OPW, Inc.

- Owens-Corning Fiberglas- Owens-Corning Fiberglas

- Pacific Pride- Pacific Pride

- Phillips Petroleum Co.- Phillips Petroleum Co.

- QuikTrip Corp.- QuikTrip Corp.

- Riverside Hospital- Riverside Hospital

- Rosemont Analytical, Inc.- Rosemont Analytical, Inc.

- Saber Equipment Corp.- Saber Equipment Corp.

- Schlumberger Technologies

- Sheetz, Inc.- Sheetz, Inc.

- Shell Chemical Company- Shell Chemical Company

- Shell Oil Products Company- Shell Oil Products Company

- Shrieve Chemical- Shrieve Chemical

- Skyhawk Chemicals, Inc.- Skyhawk Chemicals, Inc.

- Smith Fiberglass Products Inc.- Smith Fiberglass Products Inc.

- Sun Refining & Marketing- Sun Refining & Marketing

- Teleflex Incorporated- Teleflex Incorporated

- Texaco Refining & Marketing- Texaco Refining & Marketing

- The Chemical Company- The Chemical Company

- The Fiberglass Tank & Pipe Institute- The Fiberglass Tank & Pipe Institute

- The Ryland Group- The Ryland Group

- The Sterling Faucet Group- The Sterling Faucet Group

- The Toledo Hospital- The Toledo Hospital

- Tokheim Corporation- Tokheim Corporation

- Total Petroleum, Inc.- Total Petroleum, Inc.

- United States EPA- United States EPA

- Unocal Chemicals- Unocal Chemicals

- Vara International- Vara International

- Veeder-Root Company- Veeder-Root Company

- Wayne-Dresser- Wayne-Dresser

- Walto Truck Equipment Co.- Walto Truck Equipment Co.

- Welland Chemicals- Welland Chemicals

- Williams Energy

- Wright Express- Wright Express

- Xerxes Corporation- Xerxes Corporation

- Chemicals- Chemicals

- Commercial Architecture- Commercial Architecture

- Commercial Fueling Facilities- Commercial Fueling Facilities

- Contractor Equipment- Contractor Equipment

- Decorating Products- Decorating Products

- Energy- Energy

- Environmental Testing- Environmental Testing

- Grills, Diffusers, and Registers- Grills, Diffusers, and Registers

- Hand Tools- Hand Tools

- Health Care- Health Care

- Insulation- Insulation

- Light Industrial Manufacturing- Light Industrial Manufacturing

- Modular Homes- Modular Homes

- New Single Family Homes- New Single Family Homes

- Overhead Doors- Overhead Doors

- Petroleum Market- Petroleum Market

- Pollution Control Equipment- Pollution Control Equipment

- Pharmaceuticals- Pharmaceuticals

- Plumbing Products- Plumbing Products

- Pressure Sensitive Labels- Pressure Sensitive Labels

- Pumps- Pumps

- Resins and Coatings- Resins and Coatings

- Retail Service Stations- Retail Service Stations