Attachment A Soil reports

Page 2

ON-SITE EFFLUENT DISPOSAL REPORT: 146 Solar Road, Mt Cooroy.

Introduction:

Allgo Wastewater Management 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 1547-2000-"On-Site Domestic Wastewater
Management and the Queensland Plumbing and Wastewater Code. Field work for this assessment was
undertaken, on the 12/6/2014.

This assessment has been based upon the proposed house plans, provided by the client.
Site description:

The allotment is located within the Sunshine Coast Council.

and is contained within a | semi-rural area.

The slope within the aliotment is generally linear. The slope within the area best suited for effluent
disposal is in the order of 15%.

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

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

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

Y permeability, soil type and soil depth.

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

v general climate.

¥ 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
- 2000. A further 100mm diameter hole was excavated to determine the soil profile. The site was then

classified in accordance with AS 1547 — 2000 On-Site Wastewater Management for the purposes of
effluent disposal.

AUSTRALIAN SOIL INVESTIGATIONS ASI Ref: 140120(A)

Page 3

Results:

Site Observations

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

Is the potential of runoff from the proposed area OK

Is there a potential for groundwater seepage

Soil Borehole Results

Ves

a a a a a

Depth Soié Description

0-400 Silty Clay CL

Light to med clay, Dark brown

Moist, Mod (Cat 4)

400-2000 Silty Clay CH

Heavy clay , orange brown

Moist, mod. (Cat 5)

Traces of gravel

2000 Borehole Terminated

Dense gravel

Constant Head Method permeability results

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

3
Faéé (mm) 25
Time (mins) 124
(secs) 9
Iudicative Permeabieity (Ksat) 0.0322
Soié Category 6
3

AUSTRALIAN SOIL INVESTIGATIONS

Test Site:
4
25)
39
47
0.1005
5

No

25:
41

0.0973

ASI Ref: 140120(A)

Page 4

Indicative Permeability

 

 

 

 

 

 

 

 

 

 

 

Test Site: 3 4 | 5
Soil Category 6 D 5
| Structure Moderate Moderate Moderate
Indicative Permeability - <0.06 0.12-0.5 0.12-0.5
DIR 15 20 20
Recommendations:

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

For the treatment of the Effluent we recommend;
Advanced Secondary WasteWater Treatment System (AWTS)
(NOTE: The system chosen must satisfy both the Queensland Plumbing and Wastewater Code and

AS1547-2000 On-Site Domestic Waste Water Code and be approved for use by the Local Shire/Council
governing the allotment.)

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

A Pregguriged Su6-Sutface Reticulated Jrrigation System

(NOTE: Where Surface irrigation is used in conjunction with an Aerobic Sand Filtration System the treated
effluent shall be disinfected with chlorine prior to dosing of the Land Application Area.)

The size of the Land Application Area is calculated as follows;

Minimum requirement q 115 litres per person per day AS 1547-2000 Appendix 4.2D
Water Supply Tank water
Number of persons = 6 AS 1547 Table 4.343
Total Volume Q= 4830 min/week
Soil Category 5 AS 1547 Table 4.2A4
Indicative permeability 0.06-0.12 AS 1547 Table 4.244
DIR 20 mm/day AS 1547 Table 4.2A4
Disposal Area A= 242 m

AUSTRALIAN SOIL INVESTIGATIONS ASI Ref: 140120(A)

Page 5

WE RECOMMEND THAT A MINIMUM LAND APPLICATION AREA OF 242m? BE PROVIDED.

A check of Water Balance requirements in accordance with the Code has been undertaken
and have been found to comply

The Irrigation System should be designed in accordance with AS 1547 - 2000 and comply with all
relevant statutory requirements

Construction Guidelines for Land Application Areas:
Surface Irrigation

Consists of a reticulated pressurised irrigation system that uses a series of surface sprinklers to equally
distribute the treated effluent across the Land Application Area. This system allows vegetation within the
area to directly benefit from such watering which also assists in disposal of the effluent via evapo-
transpiration. Points to consider in the construction of the area include the following:

» To avoid runoff from the area it should be as level as possible. Any sloping areas should be
terraced or retained and filled

> rainwater shall be diverted around the perimeter of the area by use of open catch drains or
bunding. Similarly a retention bund should be constructed around the low side of the area to
retain any effluent overflow.

» Sprinklers with a throw of not more than one meter shall be used and produce coarse
droplets (instead of a fine mist) to minimise the risk of aerosol dispersion and wind drift of
effluent. The plume height shall not be more than 300 mm above the finished surface of the
irrigation area.

> The treated effluent must not be used for the irrigation of fruit or vegetables

> Siting of surface irrigation shall be in a location away from regular pedestrian traffic and
recreational areas, so there is no risk of direct spray or wind driven spray onto such areas.

> The area should not be within vehicle paths or be near children’s play areas
>» Treated effluent quality must conform to AS 1547-2000 and the Queensland Plumbing and
Wastewater Code,

We have attached a site plan showing the proposed position of the Land Application Area and also some
details highlighting the construction techniques required for surface irrigation.

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.

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

AUSTRALIAN SOIL INVESTIGATIONS 5 ASI Ref: 140120(A)

 

Page 6

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 Allgo Waste
Management

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;

Sub-Surface or Covered Surface Land Application Areas(ADVANCED SECONDARY)

Property Boundaries Upslope from the Area - 2.0m
Property Boundaries Downslope from the Area - 4.0m
Dwellings Swimming Pools 5 6.0m
In-ground Potable Water Tanks = 15.0m
Dams, Watercourses or Bores = 10.0m
Vertical distance to water table - 0.6m

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 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.

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.

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 ASI Ref: 140120(A)

 

Page 7

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 titre 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.

| la

W. Holmes SCRC 041
For and on behalf of:

AUSTRALIAN SOIL INVESTIGATIONS

AUSTRALIAN SOIL INVESTIGATIONS 7 ASI Ref: 140120(A)

Page 8

 

 

Approved 10 Person
Aerated Waste Water
Treatment System.

Supply from pump

set, sized for

24L/min (min.) to

disposal area. = \.

Inline strainer
150-200um .

aoe seperation between platforms.

Revision |Description Date

 

15/10/08 Sub-Surface

 

 

 

 

 

 

 

Where the ground slope exceeds 15%
the area must be terraced into 3.0m
wide platforms containing a minimum
of 2/25mm laterals each. Provide

Surface runoff diversion
drain or bund.

 

 

 

 

Non-Return valve
where AWTS below
aplication area.

K-Rain valve | = ——"
No. of ports

to suit No. of

laterals.

 

Lateral header pipe sized
to ensure equal flow to
laterals. |

 

 

Extent of land
application area
(hatched), size as

 

 

Legend

3 Flushing valvels in control
boxes with Lilac lids,

© _ Vacuum breaker positioned
at highest point of area.

1000 Typ.

 

 

indicated on plan.

25mm poly laterals with 49 holes

 

drilled at 2000 ctrs.
We advise laying laterals within
Surface runoff t f ! slotted ag pipe or similiar

retention bund.

DISPOSAL AREA PLAN (Typ.)

Distribution System
Diversion

ZN

25mm laterals within 150(W)
x 200(D) sookage trenches
aligned parallel with surface
contours, 20-25mm gravel,

 

General Notes :

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

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

3. The installation is to be in strict accordance with AS 1547-2000, Local
Authority requirements and Allgowostemanegment Absorption Report.

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

laterals, depth 100
: 1000
Drain. approx \ | Te
Ground Level
as

 
  

 

Number of laterals shown indicative only, number to
suit irrigation area and offsets shown.Min 6x20m per
200m.

 

 

 

150mm min
Topsoil.

Retension

(on Bund.
i

S
=)
wm

min.

 

Rrovde geotextile Groundwater Level
wrapping. Dann

 

 

Upon completion the disposal area shall be planted
with approved vegetation, refer attached listing.

 

 

Drg No. ABS—002

 

AUSTRALIAN
sor w SOIL INVESTIGATIONS

1/11 PROJECT AVE NOOSAVILLE QLD.4569
Ph 04280 310 453 Fax (07) 54472 634

 

STD DETAIL Drg No. ABS-002

 

 

 

 

Page 9

Plumbing Services

= a PO Box 141 TEWANTIN QLD 4565
fe] NOOSA COUNCIL Porson °
[email protected]

 

SITE EVALUATOR(S )

 

NAME: (Principal Evaluatop.7. rs as Renee
COMPANY/AGENCY.....> SA Beas es
Pelciens NI PEE, SORT

 

 

SITE INFORMATION

 

Location Details:

LSOGEUIEY is etemret IN oo) a oo canzone co phegehglnenenuneaxennsdaceusslesusa onsen pusiauptisartonseonaniensecauaavemespernstays
Owner: .... A5@ex$ 4S =
Address:

    

Climate:

Annual rainfall: io aes mm

Data‘souree Used: ... SSNs sc. eR | OM tect Beste Me ee. CR anaes ee Recess
Intended Water Supply Source: in

Public Supply o Rainwater (roof collection) oO

Photographs(s) or Video attached: (Please tick box) YES L] NO a Specity details) :...... ce eens

 

ON-SITE EVALUATION

 

 

Work Undertaken:
Details:

   

      
   
  

   
 
 
 

Date: “N2\Se\ rene Weather: . (on day and proceeding week)
Photocopy of desktop study attached (Please tick box) YES C] NO Epecify details)...000 0...
Topography: >< .
Slope: ........ Sh a ee ae Ground Cover: CALARS E'S. 2. Stent TLS,
Geology confirm: (Please tick box) YES 1] NO a esos ccaa ta eacoam peat scuincstr ed sear ero eae nae tanpra rea eno neaeaaNt
Soil landscape confirmed: (Please tick box) YES TL) NO Ci ooo... cccccceecc ces ececesseueeuseveseeecsvssseesesecs
Drainage Patterns: ............. . Site Plan details attached: YES / NO: oo... eee
Clearance :.........:.. ....Site Plan details attached: YES / NO...

Boundaries: . ESSE SAce Allowable Minimum: ................ecceceeeeee Available: .. z
Waterways: DER aAetn.........Stands of trees/shrubs: .. WENSIDONES: unccamssnvenversncats
Embankments: ............... ... Buildings: ...H.Oss

Other GOSCIHY)P xasenseenereimew comatose

Site History (land use):
Environmental concerns (e.g. native plants intolerant of phosphorous load, high watertable, swamp,
WISI CIEE eins sana ccrercaxereeenacisanciianniinasseaedinnecarnnenneecenaaesanmrensesseenranenneess

 

 

 

Page 10

 

Drainage Controls neater ila ciccc. cece cect ens e cen osebebnaiaaaaisaaie ca agen gel ame eee esa coe ceases aire as

 
 

 

 

 

 

Depth of seasonal watertable:.......c cc ccecsesesceesseeneessesteseeceeseresee Is groundwater quality an issue? YesC] Nol]
Needtforcutotixdneins/GiVensiOMS+DANKS? sor sscc.sccrriesaveec fs cv cov esWovs covene units sive soe tSWeeWeeaasobbaaaniateveWs Sv tunes Ceusau
Need for surface water collector/cut off drains: .......... oe
Treatment plant lid shall be above Q100 flood prone area...... 0. eee tee nr enti ennnteene tee eeeeeeenes
Availability of reserve/setback areas (show details on sketch plan) =
Reserve area available for extensions: ......... TAMER. % of design area:.... SSS. ee
Photographs attached: YES [1 NO LW specify etal): ccc cece cee ceneeeceete eee teeeeeteeeusteeeenentinesetatee
SOIL INVESTIGATION
Soil Profile Determination: Mark on site plan scaled or dimensioned: .........0......00. 00. ccc cceceee cee cee ees eens
Test Pit! (1 Borehole: Other: FE] Please specify: S090... eae TR

Reporting (Attach IBOPEIMGGS) =... 5 acne coef ot teen nnn dqinnns saree Reman gana emrresreten yap deeereaesatcods a beakerenek
Estimated Gon Category: 22... |. sci ccsccs ir acensiiisiens scserasakesiavess sisessite OPS ee pepe eee ee
Sen ee ae Permeability:..............0.... miday DLR/ DIR

Site Test 1 2 3 4 5 6 7

Soil

Category een. Gs S S ae caine

 

 

 

 

 

 

 

 

 

 

 

GENERAL COMMENTS

 

  

 

 

   

Remaining matters Of CONCEMN APE: .isiccccacsicsecesgeegge eeeeeesde ene sdsnsesseciscecstscessassnsesesioneecssttereseeseeeeventsbuabnees
REAM... ABT. CEE RT. LE SICACR).. 0 eee
Type of land application system considered best suited to site and why?............. ccc cette
A. VTE. BD Sais.. BRSEaSOMT ed STS. ©. PAP-Dra@eans.. ag CAT. 5
Overall evaluation of minimum land application area for the site (comprising, absorption area, space between
and surrounding the absorption area elements, setbacks and the reserve area): ...... 6.06... cccceteeeeeeee eee eeereeeetees
Other Comments eg special precautions which may be needed: ............... cece eeee

 

SUMMARY (all sections must be complete)

 

 

MY PEON SY StO MN eos... 0 Pecks ss. vos +. cava anna menaannens Nese dkratetediwazangl seater tenet ae eeeene ene em PE PRs
Type of Disposal Area .
Detail of pipe WOrkK...... 2... ee tetas
Emiiters spacings... .Spray spacings.
Manifolds............... Flush Out VaIVES... 0.2... cece eee eee eee ee eee eees Air relief valves. . He 20h

Slope at Disposal Area... 00... ees % Surface Irrigation fixed sprinklers only (max 20 % ‘slope)
Movable sprinklers spray area must cover minimum 50% of LAA, Surface Irrigation area to be mulched and
planted to ensure effluent is contained within designated area

Detail of surface pollution control: sssesscssssssarsciegeattig vars sdotiiad wevieaeespepnmgeeaxoereggennrenamazrenseseny
Size of diversion mound /Cut of drains... 0.0... eee Size of retention MOUNA!.............: cc eects ee eee eee eeee

  
    

  

Soil modifications ripped / import soil /mulched / planted (Please circle best description)

Bedrooms:............0.05 Equivalent persons:............ DIG RAD Rss: nosecrene- a Litres/person/day.........0......::0ceeees
Total Load of all system on the property over 20 EP (Please tick box) YES NO C1

Holding Tank position and size on site plan including pump out line position (Please tick box) yesO) NOOO

 

 

Page 11

 

 

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