http://www.london.ca/business/Resources/Consultant-Resources/Pages/Design-Specifications-and-Requirements-Manual.aspx
[Accessed: 30.05.2019]
Among other things, there is much information about the sewer collection system in the City of London, ON. There will be site specific situations where the design will depart from these practices as it is not possible nor is it the intention of the City to anticipate every situation.