OBC Sewage System Design: Compliance and Site Evaluation in London, Ontario
Sarah's Expert Insight
OBC Compliance Specialist
"Navigating Section 8 of the OBC is critical for rural developments in London or cottage country like Muskoka where municipal services are unavailable. As your lead consultant at empcontracting.ca Inc. your construction contractor in London, Ontario, I ensure that site evaluations and percolation tests strictly adhere to these standards to prevent system failures and protect local water tables from contamination."
Understanding the Ontario Building Code (OBC) requirements for sewage systems is essential for any property development or commercial renovation. Whether you are managing a restaurant in London or a luxury cottage in Muskoka, compliance ensures environmental safety and system longevity. At empcontracting.ca Inc. your construction contractor in London, Ontario, we specialize in interpreting and implementing these complex Part 8 regulations.
Permitted Discharges to Private Sewage Systems
The OBC outlines specific limits on what can be discharged into a leaching bed or sewage system. Laundry waste is permitted if it remains under 20% of the total daily design sanitary sewage flow. However, industrial and commercial waste requires significantly higher scrutiny and specialized treatment before discharge.
Commercial Kitchens and Grease Interceptors
According to Section 8.1.3.1., kitchen wastewater from restaurants must pass through an operating grease interceptor that conforms to CSA B481.1 or B481.2 standards. Furthermore, it is critical to note that storm sewage is strictly prohibited from being discharged into any sanitary sewage system, as this can cause system overload and failure.
Mandatory Site Evaluation and Design Standards
A site evaluation is a legal requirement for every new or replacement sewage system installation. This process determines the feasibility of the proposed design based on the physical characteristics of the land and the surrounding environment.
Percolation Time and Soil Classification
The percolation time, which determines how quickly the ground can absorb liquid waste, must be identified through direct testing or classification via the Unified Soil Classification System. When conducting percolation tests, the OBC mandates a minimum of three suitably spaced locations. To ensure safety and prevent saturation, the highest percolation time recorded among the tests must be used for the system's design.
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.