Protection Agency and industrial clients since 1984. The focal point of our expertise is ambient air monitoring with emphasis on air monitoring operations, quality assurance auditing..., and equivalency testing of ambient air monitors. Zedek personnel have operated and audited air and meteorological monitoring stations all over the U.S. Our combined experience... of over 100 years in all areas of air monitoring means that we can provide your company with the services you need. Zedek Corporation has provided quality assurance audit services...