Appendix C - Site & Soil Evaluation and Effluent Disposal Report

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$GHTXDWHDUHDIRUD5HVHUYHDUHD                                                         √

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,VWKH6RLO7\SH6DWLVIDFWRU\                                                            √

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ON-SITE EFFLUENT DISPOSAL REPORT: Lot 1 RP 112348, 20 Woongar St, Boreen Point.
Introduction:

Australian Soil Investigations have conducted a Site and Soil Assessment at the above allotment for the purpose
of determining the most suitable means of on-site effluent disposal. On-site testing for this assessment was
performed in accordance with AS 1547-2012-“On-Site Domestic Wastewater Management and the Queensland
Plumbing and Wastewater Code.

Field work for this assessment was undertaken, on the 30/11/2021.

This assessment has been based upon the proposed plans, provided by the client.

Site description:

The allotment is located within the Noosa Council and is contained within a residential area.

The slope within the allotment is generally linear planar. The slope within the area best suited for effluent
disposal is in the order of 4%.

On-Site Assessment:
During our site evaluation consideration was given to the following:

v the available area for the primary siting of absorption areas (Land Application Area) and alternative
sightings.

v the risk of prejudicing adjoining property and underground water supplies, by seepage or run off
from the site.

v permeability, soil type and soil depth.

v drainage, and envisaged seasonal changes in ground water level.

v general climate.

v slope and the effects of seepage and water run-off from surrounding higher ground.
On-Site Testing:
Three test holes were excavated in the positions shown in the attached site sketch. These holes were 100mm
diameter x 600 mm deep for the purpose of site soil assessment in accordance with the AS 1547-2012. A
further 100mm diameter hole was excavated to determine the soil profile. The site was then classified in
accordance with AS 1547-2012 On-Site Wastewater Management for the purposes of effluent disposal.

Results:

Site Observations
Yes No

Suitable Area for siting a Land Application Area
Adequate area for a Reserve area
Is there Adequate Soil Depth; depth above rock or the water table

Is the Soil Type Satisfactory

<a- 06 hUcHeCU AOS

Is the potential of runoff from the proposed area OK

Is there a potential for groundwater seepage V

AUSTRALIAN SOIL INVESTIGATIONS Page 2 of 6 ASI Ref: 210480(A)

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Soil Borehole Results

Depth

0-300

500-800

800-1600

1600-2300

2300-3000

3000

Soil Description

Silty Sand SM
Fine to coarse grained, dark brown
roots, weakly.(Cat 2)

Sandy Clay CH
med to heavy clay, orange
roots, moderate.(Cat 4)

Gravelly Sand SM
Fine to coarse grained, brown
Moist, weakly (Cat 3)

Sandy Clay CH
med to heavy clay, orange
roots, moderate.(Cat 5)

Sandy Clay CH
Med to heavy clay, pale grey mottled red
Moist, moderate structure.(Cat 5-6)

Borehole Terminated

Constant Head Method permeability results

The following design criteria is applicable for the following disposal methods:

 

 

 

 

 

 

 

 

 

 

 

Test Site:
1 2 3
Fall (mm) 25 25 25
Time (mins) 2 1 3
(secs) 25 56 17
Indicative Permeability (Ksat) 1.6552 2.0690 1.2183
Soil Category 2 2 3
Indicative Permeability
Test Site: 1 2 3
Soil Category 2 2 3
Structure Weakly Weakly Weakly
Indicative Permeability 1.4-3.0 1.4-3.0 0.5-1.5
DLR 30 30 30
Recommendations:

Based upon our Site and Soil Assessments we recommend the following method of On-Site Effluent Disposal

should be used.

Disposal System Recommendations:

Based on our site assessment and testing we recommend that the most appropriate disposal method to be:

Advanced Secondary Treatment
With an AES Transpiration Bed

AUSTRALIAN SOIL INVESTIGATIONS

Page 3 of 6 ASI Ref: 210480(A)

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For the disposal of the treated effluent within the Land Application Area we recommend;

An Advanced Enviro Septic System (AES)

REFER TO AES CALCULATOR FOR AES BED SIZING.
Recommendations and construction guidelines for AES beds:

Ensure all manufacturers installation guidelines and requirements are strictly adhered to.(Copy of installation
requirements included in appendix).

Installers must use specified filter material.

e Avoid excavation when the soil is damp;

e Where smearing has occurred, rake the smeared soil to reinstate a more natural soil surface,
taking care to use fine tines and effect surface penetration only;

e Plan excavation work only when the weather is fine, if rain is forecast then cover trenches, if open,
protect them from rain damage;

e In permanently wet areas or when construction cannot be delayed until fine weather conditions are

achieved, smearing of soil surfaces may be alleviated via the use of gypsum (an application of
1kg/m? may be utilised);

e Avoid compaction by not having people stand on the finished trench or bed floor, and when
excavating by machine, having the bucket fitted with ‘raker teeth’ and excavate in small ‘bites’ to
minimise compaction;

e When sited on sloping ground, beds should be excavated perpendicular to the line of fall or surface
contours;
e Trench and bed inverts should be level;
e Diversion drain to be excavated above slope of land application area.
Septic Tanks:

The septic tank size shall be in accordance with the local authorities requirements. The tank must be de-
sludged at regular intervals to ensure its performance is maintained.

Backfilling:

The filter media should be placed in the trench by excavator or bucket or a shoot, and not dumped in.
Dumping is likely to cause soil damage to both the trench base and the side walls. Such damage is also likely
when backfilling is placed over in-situ filter media during or after period of heavy rainfall. The filter media for
AES system should be clean washed material suitable to manufacturers specifications. Note: ASTM Standard C-
33(Concrete sand) meets requirements. Trenches and beds will be covered with soil which should not be more
permeable than the surrounding natural soil. A protective barrier should be laid over the filter media to prevent
ingress by cover material.

Where the trench is being covered by cast in-situ concrete or other paving, plastic film or a suitable synthetic
fabric should cover the trenches to prevent concrete infiltration or ingress or bedding fines.

Preparation of irrigation area:

When a proposed irrigation area has a low permeability, it is particularly important to ensure that the
permeability of the soil in the irrigation area is improved and maintained and that there is an adequate cover of
porous and fertile topsoil to act as immediate storage of effluent applied to it, and to support rapid growth of

vegetation on the area to maximise evapo-transpiration.

It is recommended that topsoil be imported to improve rapid growth of vegetation and improve the evapo-
transpiration process.

AUSTRALIAN SOIL INVESTIGATIONS Page 4 of 6 ASI Ref: 210480(A)

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Requirements of irrigation system:

All irrigation pipe work and fittings shall comply with all parts of AS 1477 or AS 2698.2. The distribution
irrigation lines should be buried to a minimum depth of 100mm. There shall be no cross connection between
any irrigation pipe work and the potable water supply. Any pipe work used for the transport of effluent included
treated effluent must be lilac in colour

Along the boundary of the surface irrigation area there shall be at least two warning signs clearly visible to
inform the occupants of the premises that recycled water is used for irrigation. Each sign shall comply with AS
1319 and have:

(a) _ lettering visible at 3m and

(b) wording: Recycled Water
Avoid Contact
DO NOT DRINK

Prior to the use of the system, the warning signs and the landscaping and surface preparation must be
completed. The Land Application Area must also be inspected and approved for use by Australian Soil
Investigations.

Siting of the Land Application Area:

The current Code of Practice for On-site Sewerage Facilities provides minimum horizontal/vertical separation
distances for Land Application Areas. They are as follows;

Property Boundaries Upslope from the Area - 2.0m
Property Boundaries Downslope from the Area - 4.0m
Dwellings or buildings - 4.0m
In ground swimming Pools - 6.0m
In-ground potable Water Tanks - 15.0m
Dams, Watercourses or Bores - 10.0m
Vertical distance to water table - 1.2m

In no instance shall Effluent be used for irrigation of fruit or vegetables.

No Vehicle loading or children’s recreational areas to be applied or constructed within the Land
Application Area.

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 owners guide for AES systems should be downloaded from www.actiontanks.com.au. All guidelines and
recommendations are to be adhered to.

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. If
installing an AES system installer must have completed AES accreditation. Installation to be in accordance with
AES installation instructions.

Definitions:

Design Loading Rate (DLR)

The long term acceptance rate (LTAR), reduced by a factor of safety, expressed in L/m?/day or mm/day as
applied to the horizontal design area of a land application system.

AUSTRALIAN SOIL INVESTIGATIONS Page 5 of 6 ASI Ref: 210480(A)

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[OCR of page images]
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/m?/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.

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.

The operation of the disposal system is dependant upon the hydraulic load, the type of the material entering
the system and the maintenance of the system. As these factors are beyond the control of this company we do
not take any responsibility for the long term adequacy of any disposal system constructed on this site or the
consequences of its malfunction.

[ber

W. Holmes — QBCC - 1120066
For and on behalf of:
AUSTRALIAN SOIL INVESTIGATIONS — QBCC - 15072110

AUSTRALIAN SOIL INVESTIGATIONS Page 6 of 6 ASI Ref: 210480(A)

Page 7

           AUSTRALIAN
          SOIL INVESTIGATIONS


Title DETAIL PLAN-AES

Project

                                Rev.
Date:             Drg No.


[OCR of page images]
 

 

COPYRIGHT FOR DESIGN & DRAWINGS
REMAIN THE PROPERTY OF THE AUTHOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

iy
x Foe a \
SYSTEM EXTENSION BED
TOTAL 20.0m sq
REFER SITE PLAN FOR
LOCATIONS AND
SETBACK DISTANCES.
y
AES. SYSTEM -—
PIPES — a+ 54 So
|_| | Pre 3
Inspection Points are to
be installed at
the furtherest point
from inlet and also in
the
middle of the first and
second run of AES
pipes.
High Vent
3m From Low LOW VENT DN100.
Vent = \
3 Lt
Ne
Bend After Coupling >" velocity Reducer Min, Im after Coupling
32 mm Poly Max. Pump Flow
‘coupling System Inlet cep
‘SEPTIC TANK.
3000! TO AS 1546
APPLICATION AREA PLAN- Pumped System
saat LOW VENT Ss

S|
DNI00. |
(3m Differential oa

From Low Vent)

 

 

 

 

 

7150

 

 

 

150
30350

 

300

STEM SAND

 

General Notes :

1. The Plumber is responsible for locating all existing services within and
adjacent the allotment prior to commencing the work.

2. This drawing is to be read in conjunction with the attached details and the
specifications and requirements of Australian Soil Investigations Absorption
Report.

3. The installation is to be in strict accordance with AS 1547-2012, Local
Authority requirements and Australian Soil Investigations Absorption Report.

4. The work is to be undertaken and completed by a registered plumber.

5. Refer to Australian Soil Investigations report for all setback distances.

6. Disposal areas must be protected from inflow of surface water by bunds,
drains or mounding of surface as required.

7, Extension bed may be placed either side of AES pipes on level ground. Must
be placed on the downslope side on sloping sites.

8. Ensure system footprint is adequately ripped prior to placement of media
and pipework. Rip paralell to contours and system pipes.

 
 
 
  

REPLACED OVER
EXTENSION BED

TYPICAL APPLICATION AREA
DIMENSIONED SECTION

 

TOPSOIL,

OVERBURDEN

 

ABN11 147 854 439

AUSTRALIAN
SOIL INVESTIGATIONS

 

Unit 1/11 Project Ave, Noosaville
ABN11 147 854 439

 

Title: DETAIL PLAN-AES

 

Project 20 Woongar Street
Boreen Point

Drg No. 210450

 

 
    

Date: Dec 2021

 

 

  

Page 8

 

 

 

 

 

 

Site
‘Address 20 Woongar Street, Boreen Point State Qd Post Code 4565
Client
Henk N. Cusack Date of Site Visit 30/11/2021
lame
De rs Des Ph ~
“8825 W.R.Holmes signers Pn 428310453 Number 1120066
Name Number
Plumber Ph Plumb / Drainer
er TBA
Plumber (TES) Number Lic Number we
Council Designers AES
25
Noosa Cent Number Date 15/12/2021

 

 

 

This Calculator is a guide only, receiving soil classifi ce water, water tables and all other site constraints addressed by the qualified d

 

 
      

 

 

 

 

 

 

 

 

>> This design is for an ADVANCED SECONDARY system

Is this a new installation Y or N Y [>> Minimun single vent size is 80mm or 2 x 50mm house vents

Number of person 5 a septic tank outlet filter is NOT RECOMMENDED
Daily Design Flow Allowance Litre/Person/Day 120
Number of rows required to suit site constrants 4 >>Longer AES runs are better than multiplule short runs.
Infiltration surface Soil Cat as est by site/soil evaluation. CATEGORY 4 >> Catagory may require design considerations. Ref AS1547

Design Loading Rate based on site & soil evaluation DLR (mm/day) 30 >> Soil conditioning may be necessary. Ref AS1547 & Comments.

Bore log depth below system Basel area 2000__|>>Min depth below basel area 600mm check water table/restrictive laye

 

 

Enter System footprint Slope in % for std AES systems to calc extension 4 >>Consideration reqd for Sloping sites. Ref AS1547. refer comment.

 

 

 

Is this design a gravity system with no outlet filter? Y or N N >>HIGH & LOW vent requd on AES System includ velocity diffuser

 

 

 

|COMMENTS :-" The outcome must be important to everyone.

 

- Ripping of receiving surface required in clay soil structures in Cat 4,5,6. In ad.

 

ition refer to AS 1547. Always excavate & rip paralld to the site slope/ AES pipe.

- All Sloping sites require special consideration and management through design of slope percentage, surface water and construction methods as per AS1547.

- Plumbers are reminded to practice good construction techniques as per AS 1547 & as provided on AES installation instructions supplied with components,

 

 

 

 

 

 

 

 

Total System load - litres / day (Q). 600 od AES System __|_ System Extension
Min Length of AES pipe rows to treat loading 50 Im Ith m:(L) 6.6 6.6
Number of FULL AES Pipe lengths per row 2 Iths Width mW) 2.25 0.78
Sand 0.75 0.15
Total Capacity of AES System pipe in Litres 1696 itr. Denth: . .
Area m2 149 52

 

USE CUT LENGTHS OF PIPE IN THIS DESIGN? (ENTER y|

 

 

 

IF YOU WISH TO USE A TRENCH EXTENSION DESIGN OPTION ENTER "Y" Enter Custom Width in metre
AES INFILTRATION FOOT PRINT AREA- L=Q/(DLRxW) | Length Width Minimum AES foot print required .
for this Basic Serial design is 6.6 x 3.03 = 20.0 m2 total

 

 

 

 

 

 

 

   

 

 

AES-PIPE AES 3 mtr Lths required 8 Iths Digitally signed by
AESC AESC Couplings required 4 ca Steve Dennis
AESO AESO Offset adaptors 8 ea DN: cn=Steve
Dennis, o=Chankar|
AESODV AES Oxgen demand vent 2 ea Enviromental,
AES-IPB AES 100mm Inspection point base 2 ea © AbvANCED _ou=Design
‘nares Wastenatersoluions” Review,
AES Equ AES Speed Flow Equaliser ca email=steve@envir
AES DESC Double Offset Adaptors ea o-septic.com.au,
TOTAL SYSTEM SAND REQUIRED (Guide Only) 14 m3 c=US
Date: 2021.12.15
PLEASE email your / ‘ALC and Drawings to 10:43:54 +10'00'
[email protected] [email protected]

 

> The AES Calculator is a design aid to allow checking of the AES components and configuration and is a guide only. Site and soil
conditions referencing the AS 1547 standard are calculated and designed by a Quailified Designer.
> Chankar Environmental has no responsibility for the soil evaluation, loading calculations or DLR entered by the designer for this calculator.

> AES pipes can be cut to length on site. They are supplied in 3 meter Iths only.

 

 

AES-Design-V8.8-Calculator © Copy Right - Chankar Environmental pty Itd 14/3/2016

 

Page 9

                                                                                          Revision     Description                         Date
                                                                                          .            .                                   .
                                                                                          .            .                                   .
                                                                                          .            .                                   .




   Surface
   Drainage          Good.

  Vegetation       Grasses &
                 Scattered Trees

       BH 2
               Borehole location.
                                                                      ABN11 147 854 439
               Slope                                                                          Title:       SITE PLAN - On-Site Effluent Disposal
               measured as a percentage gradient from
                                                         AUSTRALIAN
               high ground to low ground.               SOIL INVESTIGATIONS                   Project N. Cusack, 20 Woongar Street
                                                                                                      Boreen Point
                                                                                                                                           Rev.
DO NOT DIMENSION OFF THIS DIAGRAM.                                                            Date: Dec 2021           Drg No.210450-ABS          .