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FREE WEBINAR: The What, How and Why of Combined Treatment and Dispersal (CTD) Systems

This course is approved for 1 credit hour in:
  • Indiana - Professional Engineers
  • Iowa Onsite Wastewater Association - IOWWA - CIOWTS
  • Massachusetts - Soil Evaluator
  • Massachusetts - System Inspectors
  • National Environmental Health Association - NEHA
  • New Hampshire - Designers & Installers
  • New York - Land Surveyors
  • New York - Professional Engineers
  • Maine - Local Plumbing Inspectors
  • Maine - Site Evaluator
  • Maine - Voluntary Certification for On-Site System Contractors

Join us for a FREE live webinar hosted by Infiltrator Water Technologies featuring members of our team. Please note all webinar times are Eastern Standard time.


Combined treatment and dispersal (CTD) systems are an option for both residential and large flow onsite wastewater treatment and dispersal. This presentation focuses on passive, sand-based CTD systems (there are others, such as peat-based CTDs, for example); including what they are, how they function, and why they are increasingly becoming another valid solution for wastewater management professionals, particularly with respect to difficult sites.  The presentation concludes with an overview of the proprietary technologies in use in the United States and Canada today.

Speaker Biography

Dick Bachelder, Senior Regulatory Specialist
Dick has been in the plastic leaching chamber business for over 30 years.  He started in 1990 in his home state of Maine when he joined PSA, Inc., the company which developed the BioDiffuser line of plastic leaching chambers.  He joined Advanced Drainage Systems, Inc. (ADS)  in 2000 and worked for 13 years with that company’s Allied Products division before joining Infiltrator in 2013. Dick’s focus over the years has primarily been on product approval development and management, as well regulation oversight and development.

Dick’s industry involvement includes three years of service on the first Ohio Department of Health’s Technical Advisory Committee. He is a founding member of the National Onsite Wastewater Recycling Association (NOWRA) and is presently a voting member of the Canadian Standards Association’s (CSA) B65 Technical Subcommittee on onsite wastewater system design and installation, a Director of the Yankee Onsite Wastewater Association (YOWA), and a Captains of Industry (COI) member of the State Onsite Regulators Association’s (SORA).

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