Onsite Sewerage Systems: Advanced Soils-Based Design

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Available as an on-demand self-paced version

  • Five recorded sessions. Approximately 15 hours to complete. 
  • With extensive learning resources including several quantified models, spreadsheets for mounding effect calculations, case studies, etc.
  • Instruction by: Michael Payne, P.Geo., P.Eng.; Ian Ralston, P.L.Eng. and Jim Andersen, AScT., ROWP.
  • Fees are $750 plus GST.

Course Purpose

Continuing professional development for Professional Engineers and Geologists practicing in the onsite sewerage field and for experienced Registered Onsite Wastewater Practitioners with the Planner certification.

This course provides a fast-paced refresher for soils characterization, treatment processes in soil, water mounding effects under dispersal systems and delivers advanced competencies for custom design of soil-based treatment and dispersal systems including departures from minimum system length/linear loading standards, horizontal separation and other potential departures from the BC Sewerage System Standard Practice Manual.

This course is best suited for Practitioners and Professionals with previous training and experience for soils characterization and design of onsite sewerage systems.

Course Content

  • Advanced site and soil assessment in accordance with the USDA Soil Classification system and the BC Sewerage System Standard Practice Manual (SPM).
  • Soils based treatment principles and application of the SPM dispersal standards. Including an overview of the SPM Volume IV - Rationale for soil dispersal design.
  • Estimating seasonal saturation levels for vertical separation determination.
  • Challenges to compliance with the SPM Minimum System Contour Length and Linear Loading Rate standards. Strategies and rationale for departures, including in-situ mounding tests and other quantifiable approaches to custom linear loading rates.
  • Sewerage system design for non-residential high strength waste, including organic loading approaches.
  • An introduction to nutrients attenuation and de-nitrification.
  • An introduction to standard practice for departures from horizontal separation standards including well setbacks. The required scope of analysis, mathematical modelling and reporting for setback departures will be presented.


  • Instructor-led lecture with case studies and mathematical modelling exercises.
  • Learning resources are provided including digital files for:
    • BC Sewerage System Regulation.
    • BC Sewerage System Standard Practice Manual.
    • BC Manual of Composting Toilet and Greywater Practice.
    • BC Municipal Wastewater Regulation.
    • ASTTBC Policies and Guidelines for onsite sewerage.
    • EGBC Policies and Guidelines for onsite sewerage.
    • SSR Interpretive bulletins from the Ministry of Health.
    • USDA Field Book for Describing and Sampling Soils.
    • Several mathematical models to determine custom hydraulic and linear loading rates.
    • Supporting research for estimating pathogen attenuation, oxygen transfer, water table mounding, etc.
    • Spreadsheet to support in-situ mounding studies and custom linear loading rates.
    • Spreadsheet for estimating treatment in soil.
    • Case studies and learning exercises for quantified approaches to custom design (with answer keys).
    • Slide printouts and study notes.


To register for this course please select the ADD TO CART button. Or simply call us or email, or use the form below.

If you require additional information, please don't hesitate to contact us.


Get in touch!

We value one-to-contact. Please don't hesitate to call or email us for discussion about your pathway to ROWP certification or your professional development needs.

We are happy to help.

Phone: 250-468-9772

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