Thammasorn Group is a leading provider of environmental services in Thailand and ASEAN countries. Under the concept of "Total Environmental Management", our products and services include water and wastewater tanks, septic tanks, waste management, energy, and transportation services for both government and private sectors. Our group of companies include: 1. DOS Life: a leading producer of septic and water storage tanks. We have been producing and selling more than 400,000 tanks a year with over 1,000 channels of distributions nationally. 2. DOS Greenovation: Clean energy provider and provider of solid waste treatment products and services such as incinerators and waste sorting processes. 3. DOS Corporation: An engineering company with decades of experience in design, equipment, construction of large and small scale biogas systems 4. Lynn: Provider of sliding door and window systems for use in both residential and commercial buildings