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LEHDER Environmental Services is an environmental consulting  company focused on providing Excellence in Industrial Air Quality  Services. Formed in 1995, LEHDER is now one of the largest Air  Quality Management companies in Canada. All Air Quality aspects – source testing, emission inventories, air  dispersion modeling, data interpretation and approval applications –  are managed internally without outsourcing and partnering.   We are  here to serve your needs. Contact LEHDER now to discover how we can support your company.                   
Welcome to LEHDER Excellence in Industrial Air Quality Services
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