PART 8 — SEWAGE SYSTEMSUpdated for the 2024 Ontario Building Code
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8.8.1.2.Acceptable Installation
(1) A Class 5 sewage system may be installed in the following circumstances:
(a) where the proposed use of the sewage system is for a temporary operation, excluding seasonal recreational use, not
exceeding 12 months in duration,
(b) to remedy an unsafe sewage system where the remediation of the unsafe condition by the installation of a Class 4
sewage system is impracticable,
(c) to upgrade a sewage system serving an existing building, where upgrading through the use of a Class 4 sewage
system is not possible due to lot size, site slope or clearance limitations, or
(d) as an interim measure for a lot or parcel of land until municipal sewers are available, provided that the municipality
undertakes to ensure the continued operation of an approved hauled sewage system until the municipal sewers are
available.
(2) Where a Class 5 sewage system is installed, a written agreement for the disposal of sanitary sewage from the sewage
system shall be entered into with a hauled sewage system operator.
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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.