(a) a chemical toilet, an incinerating toilet, a earth pit privy, a pail privy, a privy vault and a recirculating toilet, a self-contained portable toilet and all forms of privy including a portable privy, an composting toilet system,
(b) a greywater system,
(c) a cesspool,
(d) a leaching bed system, or
(e) a system which 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,
where these
(f) have a design capacity of 10,000 Litres per day or less,
(g) have, in total, a design capacity of 10,000 Litres per day or less where more than one of these is located on a lot or parcel of land, and
(h) are located wholly within the boundaries of the lot or parcel of land on which is located the building which they serve.
Septic tank means a watertight vault in which sanitary sewage is collected for the purpose of removing scum, grease and solids from the liquid without the addition of air and where solids settling and anaerobic digestion of the sanitary sewage takes place.
Treatment unit means a device which when designed, installed and operated in accordance with its design specifications provides a specific degree of sanitary sewage treatment reducing the contaminant load from that of sanitary sewage to given effluent quality.