VIC Part C4 Low risk on-site liquid trade waste systems

The Objective of this part is to—

1. safeguard people from illness, injury or loss (including loss of amenity) due to the failure of a low risk on-site liquid trade waste installation; and
2. ensure that a low risk on-site liquid trade waste installation (including an installation provided for use by people with a disability) is suitable; and
3. conserve water and energy; and
4. safeguard the environment; and
5. safeguard public and private infrastructure; and
6. ensure that a low risk on-site liquid trade waste installation is designed and is capable of being maintained so that throughout its serviceable life it will continue to satisfy Objectives (a) to (e).

(1) Where liquid trade waste is generated, adequate space and facilities must be provided for the safe and hygienic collection, holding, treatment and/or disposal of the waste.

(2) Low risk on-site liquid trade waste systems must process liquid trade waste generated from an industry, business, trade or manufacturing process so that public health and environmental standards required by the authority having jurisdiction and/or particular requirements of the receiving Network Utility Operator, where applicable, are achieved.

(1) A low risk liquid trade waste appliance must—

1. be located as close as practicable to the fixtures that it serves and if of the portable type must be installed above ground; and

1. be fitted with a cover which is able to withstand vehicular or pedestrian traffic or other loads likely to be imposed on it and is readily removable by one person; and

1. be constructed of materials suitable for the nature of the wastes likely to be discharged through the appliance.

(2) A low risk liquid trade waste appliance must—

1. if fitted with an airtight cover, be provided with a DN 32, DN 50 or DN 80 sized vent as nominated by the relevant Network Utility Operator; and
2. be provided with the following outlet ventilation—
   1. if installed outside a building, a DN 100 sized riser off a disconnector gully in accordance with clause 4.6.2 of AS/NZS 3500.2;
   2. if not of the portable type and installed inside a building, a DN 50 sized vent off a disconnector gully in accordance with clause 4.6.5 of AS/NZS 3500.2; and
   3. if of the portable type installed inside a building, a DN 50 sized vent off a DN 80 sized trap riser in accordance with clause 4.6.5 of AS/NZS 3500.2.

(3) If a low risk liquid trade waste appliance and outlet vent are interconnected, the interconnection must be in accordance with clause 6.9.3 of AS/NZS 3500.2.

(4) The outlet from a low risk liquid trade waste appliance must—

1. if of the portable type receiving a hydraulic loading of up to 5 fixture units, be a minimum size of DN 50; or
2. if of the portable type receiving a hydraulic loading of more than 5 fixture units, be a minimum size of DN 80; or
3. in cases other than that in (a) or (b), be a minimum size of DN 100; and
4. have a separate trap, of the same size as the outlet pipe, installed at its outlet.

(5) In this clause hydraulic loading means the rate of discharge imposed on a sanitary plumbing installation and is measured in fixture units; low risk liquid trade waste means water-borne discharges other than sewage that are classified by an Authority within the meaning of the Water Act 1989 as being of low risk from causing harm to the environment and the assets of that Authority; low risk liquid trade waste appliance means an appliance that traps and partially treats low risk liquid trade waste and prevents it from entering the sewerage system.