Appendix C - site and soild evaluation for on site effluent.pdf

System Maintenance:

The owner of the property shall ensure that all manufacturers maintenance procedures are undertaken in
accordance with the local authority and the manufacturers recommendations for what ever system is installed.
The system must be inspected/tested on a regular basis in accordance with the manufacturers requirements and
all Statutory requirements from relevant local and state government agencies.
NOTE: No Antibacterial products or disinfectant to be used in the system. Refer to manufacturers
guidelines on safe products to be used in the system.



System Installation:

Installation of the system must be undertaken by a qualified plumber in accordance with local authority
requirements and in accordance with the relevant Australian Standards and Australian Building Code.
NOTE: The system is not to be installed or utilized without Plumbing approval from Council.
 The building is not to be occupied without Building and Plumbing approval. Permit Numbers are to
be provided to the installer and designer.


Definitions:

Design Loading Rate (DLR)
The long term acceptance rate (LTAR), reduced by a factor of safety, expressed in L/m 2/day or mm/day as applied
to the horizontal design area of a land application system.
Design Irrigation Rate (DIR)
The loading rate that applies to the irrigation of a land application area with effluent of a secondary quality. It is
expressed in L/m2/day or mm/week. If a spray irrigation system is used, the secondary effluent is subject to
continuous disinfection.
Durable Aggregate
An aggregate with the grading requirements specified in AS 2758.1 for single-size course aggregate for nominal
sizes from 20mm - 40mm.
Dry Vault
Commonly known as “composting toilets”, a chamber that receives and treats human and domestic organic waste
using a biological degradation or dehydrating process. The only water used is for cleaning or assisting the
biological degradation process.
Geotextile
Any permeable durable synthetic textile material used with foundations, soil, rock, earth or other geotechnical
engineering related material.

Land Application Area
The designated area of land and reticulation system used for the disposal of the treated effluent.
LTAR
The long term average rate an effluent can be adsorbed into the soil of a disposal system, expressed in litres per
square meter per day. LTAR is dependent on effluent quality, permeability and organic loading.
Permeability
The rate clean water is transmitted through a soil, expressed in meters per day.
Terrace
Where the trenches are in an area where the slope exceeds 15% (approximately 1 in 7) they must be terraced.
Water Reduction Fixtures
Fixtures include dual flush water closets, shower flow restrictors, aerator taps and water conserving washing
machines.




   AUSTRALIAN SOIL INVESTIGATIONS                              6                               ASI Ref: 240038 (A)