The Ontario Building Code | Discharge
(3) Where industrial process waste water is treated to the contaminant levels found in domestic sanitary sewage, it may discharge to a leaching bed provided the treatment unit and sewage systemare designed in accordance with good engineering practice.
(4) Where kitchen waste water from a restaurant has passed through an operating grease interceptor, it may discharge to aleaching bed provided the sewage system has been designed in accordance with good engineering practice.
(7) Storm sewage shall not be discharged into a sewage system.
(8) The interceptor required in Sentence (4) shall,
(a) have a minimum flow rate as required by Sentence 22.214.171.124.(8) using a 60 second drain down time, and
(b) conform to,
(i) CSA B481.1, "Testing and Rating of Grease Interceptors Using Lard", or
(ii) CSA B481.2, "Testing and Rating of Grease Interceptors Using Oil".
Section 8.2. design Standards
8.2.1. General Requirements