The Ontario Building Code | Construction Requirements
188.8.131.52. Construction Requirements
(1) The bottom of the cesspool shall be at least 900 mm above the high ground water table.
(4) The cesspool shall be provided with a tight strong cover that shall remain over the cesspool except when it is necessary to remove it for the purposes of adding sanitary sewage to or removing sanitary sewage from the cesspool or for purposes of maintenance of the cesspool.
(5) Where the cesspool extends to the ground surface, the cover required in Sentence (4) shall be lockable.
(6) The soil or leaching bed fill around the perimeter of the cesspool shall be raised or mounded to a height of at least 150 mm above ground level.
Section 8.6. Class 4 Sewage Systems
8.6.1. General Requirements