Derenzo Environmental Services (DES) is an environmental consulting and testing company that offers comprehensive air quality services including air permitting, source testing, ambient air monitoring, and engineering and regulatory analyses. Environmental consulting services are provided to a wide variety of manufacturing, waste management and energy production companies. The company has offices in Livonia and Lansing, Michigan, which allow for easy access to many clients in the Great Lakes / Midwest region. While many of our clients are located within the Midwest, environmental analysis, permitting and testing services have been provided companies located throughout the United States and internationally. DES was founded in 1989 and has grown to become a recognized provider of quality environmental consulting services. We are committed to servicing the client and providing expertise and knowledge to meet the requirements of promulgated and proposed regulations, enforcement actions, and complex air pollutant specifications. Our management philosophy is to work closely with clients in order to develop proactive strategies that effectively address these regulatory and air pollutant measurement requirements.