8.1.3.1.Discharge

(1) Except as provided in Sentences (2) to (6), the sewage system shall be designed and constructed to receive only sanitary sewage of domestic origin. (See Note A-8.1.3.1.(1)) (2) Where laundry waste is not more than 20% of the total daily design sanitary sewage flow, it may discharge to a sewage system. (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 system are designed in accordance with good engineering practice. (See Note A-8.1.3.1.(3)) (4) Where kitchen waste water from a restaurant has passed through an operating grease interceptor, it may discharge to a leaching bed provided the sewage system has been designed in accordance with good engineering practice. (5) Waste water from a kitchen equipped with a garbage grinder may be directed to the sewage system provided the system has been designed to accept such waste water. (6) Water softener and iron filter discharge may be directed to the sewage system provided the system has been designed to accept such discharges. (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 7.4.4.3.(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.”