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| OTHER SUPPLIERS |
| | PLC | | Manufacturers of Environmental Equipment and Control Systems for Soil and Ground Water Remediation | | |
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| | Porex Filtration | | Manufacturers of Radial Cartridge Filters Designed to Fit Standard Cartridge Filter Housings | | |
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| | Porous Media Corporation | | Designers and Manufacturers of Advanced Technologies for the Separation of Liquids, Solids and Gases | | |
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| | PPC Biofilter | | Air Pollution Control Equipment for Boiler Emission, Odor, Particulate and Opacity Control | | |
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| | Purafil, Inc. | | Manufacturers of Air Filtration Chemicals and Equipment to Remove Gaseous Contaminants | | |
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| | RPA Process Technologies | | Manufacturers of Industrial Water Filtration, Separation, Mixing, and Extrusion Processing Equipment | | |
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| | Sefar America Inc. | | Manufacturers of Screen Printing and Filtration Solutions | | |
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| | Southern Metal Processing Co., Inc | | Filter and Metal Cleaning Services and Solutions for the Polymer, Chemical and other Industries | | |
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| | U.S. Air Filtration, Inc. | | Dust Collector and Baghouse Manufacturers of Engineered Dust Collection Systems | | |
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| | W. L. Gore & Associates, Inc. | | Manufacturers of Fluorocarbon Polymers, such as Polytetrafluoroethylene (PTFE) | | |
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| | Westech Engineering, Inc. | | Suppliers of Products and Services for Water and Wastewater Treatment and Liquid-Solid Separation | | |
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