Chemistry & Industrial Hygiene Inc - Provides expertise in exposure assessment and risk characterization for environmental and occupational health and safety hazards.
http://www.c-ih.com/
Hygiene Technologies International Inc - Hygiene Technologies International is a comprehensive occupational hygiene and safety consulting firm.
http://www.hygienetech.com/
Occupational Hygiene Solutions Ltd - Offers occupational hygiene solutions to a wide range of industry sectors throughout the UK and Europe.
http://www.occupationalhygienesolutions.co.uk/
