Attachment F - Effluent disposal report

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 dependant 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 11/5.5 litre water closets, shower flow restrictors, aerator taps and water conserving
washing machines.

Nutrient Buffer Zone
An area planted with suitable plants required to take up any excess nutrients produced within the area.
Plant selection should include native and indigenous species. This would include grasses shrubs and trees.

Report Limitations:

The log sections in this report should be representative of the soil conditions over this site, however, soil
conditions can change dramatically over short distances. The person responsible for installing the system
must observe the soil profile and ensure it matches the soil profiles recorded in this report. If soil
conditions differ from those recorded by us, we must be immediately notified so that further investigation
can be carried out and the system design modified if necessary. This work may involve additional fees
and costs. This company will not accept any responsibility for additional costs to any party as a result of
soil variations.

In writing this report, we have also considered all the information supplied to us by our client. Should the
client or his agent have omitted to supply us with relevant information, our report may be irrelevant
and/or inappropriate. We do not take responsibility for the consequences in such cases and we will make
an additional charge if as a result, more testing or rewriting of this report is necessary.

AUSTRALIAN SOIL INVESTIGATIONS ASI Ref: 150105(A)