Div. B › Part 8 › 8.4 › 8.4.2 — Design and Construction Requirements

8.4.2.3 — Sizing

Copied! ▲ ▼

(1) A Class 2 sewage system shall be designed and constructed so that the loading rate to the side walls shall be not more than the value calculated using the formula,

LR = 400 / T

where,

LR =loading rate of the sidewalls in litres per day/m2, and

T =percolation time.

OBC Definitions

Defined terms on this page

loading rate

means the volume in litres of effluent per square metre applied in a single day to soil, as defined in Part 8 of Division B, or leaching bed fill.

percolation time

means the average time in minutes that is required for water to drop one centimetre during a percolation test or as determined by a soil evaluation or analysis.

sewage

means sanitary sewage or storm sewage.

sewage system

means , (a)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)a greywater system, (c)a cesspool, (d)a leaching bed system, or (e)a system that requires or uses a holding tank for the retention of hauled sewage at the site where it is produced before 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 are 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 or buildings they serve.

construct

to do anything in the erection, installation, extension or material alteration or repair of a building and includes the installation of a building unit fabricated or moved from elsewhere; Act

On this page