8.1.

(1) The scope of this Part shall be as described in Subsection 1.1.2. of Division A and applies to the design, construction, operation, and maintenance of sewage systems.

(1) In this Part,

Soil means in-situ, naturally occurring, unconsolidated mineral or organic material, at the earth's surface that is at least 100 mm thick and capable of supporting plant growth, and includes material compacted or cemented by soil forming processes, but does not include displaced materials such as gravel dumps, mine spoils, or like deposits.

(1) All sewage systems shall be classed as one of the following:

(a) Class 1 — a chemical toilet, an incinerating toilet, a recirculating toilet, a self-contained portable toilet and all forms of privy including a portable privy, an earth pit privy, a pail privy, a privy vault and a composting toilet system,

(b) Class 2 — a greywater system,

(c) Class 3 — a cesspool,

(d) Class 4 — a leaching bed system, or

(e) Class 5 — a system that requires or uses a holding tank for the retention of hauled sewage at the site where it is produced prior to its collection by a hauled sewage system.

(1) Operation and maintenance of sewage systems shall comply with Section 8.9.

(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.

(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.

(4) Where all kitchen waste water from a restaurant has passed through an operating grease interceptor, it may discharge to a leaching bed system 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 have a minimum flow rate as required by Sentence 7.4.4.3.(8) using a 60 second drain down time.