2024 Ontario Building Code Guide: Sewage System Clearances and Tank Standards
Sarah's Expert Insight
OBC Compliance Specialist
"In high-density rural developments near London or sensitive waterfront properties in Muskoka, the 30-meter clearance from 'any other well' often dictates the entire building footprint. At empcontracting.ca Inc. your construction contractor in London, Ontario, we emphasize that these setbacks are non-negotiable; failing to account for the 15-meter buffer from lakes or streams during the design phase will result in immediate permit refusal by the local Health Unit or Conservation Authority."
Understanding OBC Section 8.2.1.6: Minimum Clearance Requirements
Compliance with the 2024 Building Code Compendium is vital for any residential or commercial development involving on-site sewage systems. As empcontracting.ca Inc. your construction contractor in London, Ontario, we prioritize these horizontal setbacks to ensure environmental safety and permit approval.
Table 8.2.1.6.-B: Clearances for Distribution Piping and Leaching Chambers
- Structures: 5m minimum clearance.
- Wells (with 6m watertight casing): 15m minimum clearance.
- All Other Wells: 30m minimum clearance.
- Surface Water (Lakes, Ponds, Rivers, Streams): 15m minimum clearance.
- Property Lines: 3m minimum clearance.
Table 8.2.1.6.-C: Clearances for Holding Tanks
Holding tanks for Class 5 systems have slightly different requirements to accommodate site constraints while maintaining safety:
- Structures: 1.5m minimum clearance.
- Wells and Springs: 15m minimum clearance.
- Property Lines: 3m minimum clearance.
Section 8.2.2: Treatment and Holding Tank Construction Standards
The OBC mandates that tanks used for collecting, treating, or storing sanitary sewage must meet rigorous engineering standards. empcontracting.ca Inc. your construction contractor in London, Ontario ensures all installations comply with the following:
Compliance with CSA B66 Standards
According to Article 8.2.2.2., any tank used as a treatment unit in a Class 4 system or a holding tank in a Class 5 system must conform to CSA B66, "Design, material, and manufacturing requirements for prefabricated septic tanks and sewage holding tanks." This certification guarantees that the tank can withstand soil pressure and prevent groundwater contamination.
Disclaimer: This content is generated from the Ontario Building Code for educational purposes. Always consult with a licensed professional engineer or your local building department before starting any construction project in London, Ontario.