Here is a list of publications on topics related to onsite sewage systems:
Authorized Persons under the Sewerage System Regulation (PDF)
Health Hazard Communication Guideline (PDF)
How to Find a Septic Tank (PDF, 3.5 MB)
Sewerage System Policy for Setback from Wells Based on Repairs or Alterations (PDF)
Sewerage System Regulation Amendments (PDF)
Sewerage System Standard Practice Manual, Version 3 (PDF, 7.6 MB)
Manual of Composting Toilet and Greywater Practice (PDF, 1.8 MB)