- Accu-Balance Associates
 - San Jose - HVAC and air quality testing and balancing. - All Chemical Disposal
- San Jose - Hazardous waste management and transportation; site decontamination and remediation services.
- Hal Murphree & Associates, Inc.
- San Mateo - Manufacturers representative for chemical storage tanks and air pollution control systems.
- Hydrocomp, Inc.
- Redwood City - Develops and distributes continuous hydrologic simulation software and provides consulting, specializing in hydrologic modelling and analysis.
- Mechanical Environmental Systems Analysis and Adjustment Agency (MESA3)
- San Jose - Providing HVAC testing, adjusting and balancing, and cleanroom performance testing.
- Meriter Company
- San Jose - Stainless sampling canisters, portable air sampling systems, heating blankets, high purity components, assemblies and systems.
- Mil-Ram Technology, Inc.
- San Jose - Offering sensors and controllers for monitoring and detecting toxic and combustible gases.
- Turner Designs, Inc.
- Sunnyvale - Manufacturer of field, laboratory, and online fluorometers, luminometers and monitors for chlorophyll measurement, fluorescent dye studies, biotechnology, and oil in water monitoring.
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