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Site and Soil Evaluation · MCU18/0084
Attached to the e-mail Visitor Accommodation Type 3 Rural (6 cabins) - MCU18/0084.
. . . . Site and Soil Evaluation . . . . .
Client: S. Keating
Location
340 Pomona Kin Kin Road
Pinbarren , QLD
(M37911)
Report No.: 180061(A)
Date: 07/05/2018
Phone: 07 5447 1304
Email: [email protected]
Address: PO Box 1661, Noosa Heads, Qld. 4567
Australian Soil Investigations Pty Ltd
ABN: 11147854439
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Page 2
ON-SITE EFFLUENT DISPOSAL REPORT: 340 Pomona Kin Kin Road, Pinbarren.
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 1547-2000-“On-Site Domestic Wastewater Management and the Queensland
Plumbing and Wastewater Code. Field work for this assessment was undertaken, on the 10/04/2018. This
assessment has been based upon the proposed plans, provided by the client. Design parameters will be based on
these hydraulic requirements.
It is proposed to construct six cabins for holiday occupation. Three four bedroom cabins and two one
bedroom cabins. Total population equivalent to 20 persons.
Site description:
The allotment is located within the Noosa Council and is contained within a rural area.
The slope within the allotment is generally linear. The slope within the area best suited for effluent disposal is in
the order of 6%.
On-Site Assessment:
During our site evaluation consideration was given to the following:
the available area for the primary siting of absorption areas (Land Application Area) and alternative
sightings.
the risk of prejudicing adjoining property and underground water supplies, by seepage or run off from the
site.
permeability, soil type and soil depth.
drainage, and envisaged seasonal changes in ground water level.
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.
Results:
Site Observations
Yes No
Suitable Area for siting a Land Application Area √
Adequate area for a Reserve area √
Setback requirements to waterways
Is there Adequate Soil Depth above rock or the water table √
Is the Soil Type Satisfactory √
Is the potential of runoff from the proposed area OK √
AUSTRALIAN SOIL INVESTIGATIONS 2 ASI Ref: 180061(A)
Page 3
Is there a potential for groundwater seepage √
Soil Borehole Results BH1
Depth Soil Description
0-400 Silty Clay CL
med clay, brown
Moist, moderate (Cat 4-5)
400-1000 Silty Clay CH
Med to heavy clay, pale brown
Moist, mod (Cat 5)
1000-2000 Silty Clay CH
heavy clay, pale orange brown & pale grey
Moist, moderate (Cat 5)
2000 Borehole Terminated
Soil Borehole Results BH2
Depth Soil Description
0-400 Silty Clay CL
med clay, brown
Moist, moderate (Cat 4-5)
400-1300 Silty Clay CH
Med to heavy clay, pale brown
Moist, mod (Cat 5)
1300-2000 Gravelly Clay CH
heavy clay, pale orange brown & pale grey
Moist, moderate (Cat 5)
2000 Borehole Terminated
Constant Head M ethod perm eability results
The following design criteria is applicable for the following disposal methods:
Test Site:
1 2 3
Fall (mm) 25 25 25
Time (mins) 38 46 51
(secs) 14 38 43
Indicative Permeability (Ksat) 0.1046 0.0858 0.0773
Soil Category 5 5 5
I ndicative P erm eability
AUSTRALIAN SOIL INVESTIGATIONS 3 ASI Ref: 180061(A)
Page 4
Test Site: 1 2 3
Soil Category 5 5 5
Structure Moderate Moderate Moderate
Indicative Permeability 0.06-0.12 0.06-0.12 0.06-0.12
DIR 20 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 Pressurised Surface Reticulated Irrigation 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 = 20 AS 1547 Table 4.3A3
Total Volume Q= 16100 mm/week
Soil Category 5 AS 1547 Table 4.2A4
Indicative permeability 0.06-0.12 AS 1547 Table 4.2A4
DIR 20 mm/day AS 1547 Table 4.2A4
Disposal Area A= 805 m2
WE RECOMMEND THAT A MINIMUM LAND APPLICATION AREA OF 805m2 BE PROVIDED.
It is recommended to divide the disposal area into two separate areas of 403m2 .
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 I rrigation
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
AUSTRALIAN SOIL INVESTIGATIONS 4 ASI Ref: 180061(A)
Page 5
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 steep 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.
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.
Sighting 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;
Surface Land Application Areas (ADVANCED SECONDARY)
Property Boundaries Upslope from the Area - 2.0m
Property Boundaries Downslope from the Area - 4.0m
Dwellings or buildings - 15.0m
In ground swimming Pools - 6.0m
In-ground potable Water Tanks - 15.0m
Dams, Watercourses or Bores - 10.0m
AUSTRALIAN SOIL INVESTIGATIONS 5 ASI Ref: 180061(A)
Page 6
Vertical distance to water table - 0.6m I n 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 w ithin 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/m2/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 11/5.5 litre water closets, shower flow restrictors, aerator taps and water conserving washing machines. AUSTRALIAN SOIL INVESTIGATIONS 6 ASI Ref: 180061(A)
Page 7
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. WADE HOLMES – QBCC 1120066 for and on behalf of: AUSTRALIAN SOIL INVESTIGATIONS – QBCC 15072110 AUSTRALIAN SOIL INVESTIGATIONS 7 ASI Ref: 180061(A)
Page 8
Revision | Description Date A 15/10/08 Surface Approved Waste Water Treatment System. Supply from pump set, sized for 24L/min (min.) to disposal area. \ Legend Non-Return valve where AWTS below apllication area. —5 32mm High Density Poly Pipe (Purple) Surface runoff diversion Distribution pipe pipe sized rt he drain or bund. to ensure equal flow to sprinklers, (254 min.). Extent of land application area (hatched), size 403sq m 2 x 22.8m dia as indicated on plan. Length of Pipe 10.4m(Max.) to sui Area Size. DISPOSAL AREA PLAN (Typ.)-MOVEABLE SPRINKLERS Large drop sprinklers, refer above for spec'n. Diversion Drain. Ground Level Groundwater Level Dw TYPICAL SECTION ~ SURFACE IRRIGATION DISPOSAL AREA S. Keating 2340 Pomona Kin Kin Rd Large drop sprinklers, 300 high maximum plume height, 2(No.) sprinklers min per 100m2 of irrigation area. Flexable lilac hose.(Length not to exceed perimeter or area.) 1000 Min. ——“- Diameter 22.8m 500 min. ° Pinbarren Cane Notes AUSTRALIAN 1. The Plumber is responsible for locating all existing services within and adjacent the allotment prior to commencing the work. hens 147 SOIL INVESTIGATIONS 2. This drawing is to be read in conjunction with the attached details and the specifications and requirements of ASI Absorption Report. 1/11 PROJECT AVE NOOSAVILLE QLD.4569 3. The installation is to be in strict accordance with AS 1547-2000, Local Ph 0428 310 453 Email: [email protected] Authority requirements and ASI Absorption Report. 4. The work is to be undertaken and completed by a registered plumber. STD DETAIL Drg No. 180061-Detail
Page 9
XS
WY
WATER REDUCTION FIXTURES ARE TO BE
INSTALLED IN THE PROPOSED BUILDINGS.
Land application Area.
403 sq.m. Surface Irrigation,
final size and location to be
determined on site.(Diameter
2.0m Min. offset from
Upslope or side
Property Boundary to
Revision | Description Date
22.8m) 10.0m Min. offset from disposal area. 103 cation ; are,
Lot number 26 Provide a surface mound or bund 32mm High house site to disposal final se ‘ond location to be
RP No. M37911 for diversion of stormwater runoff density poly area. &§ determined ite (Diamet
. around the perimeter of the area. (Purple) “ letermined on site,(Diameter
Area — 26.991 ha Property boundary 22.8my
Local Govt.: Noosa } BHT lors init oF absorption area} ]
/ / Limit of absorption area. la" Proposed
/ a
jf Hose length not Tr
/ to exceed 10.4m. 0 |_| P|
/ a)
“Proposed
\ Pp
2.0m Min. offset from \ \ PS ASWIP
Driveways to disposal 3S Expected cn) Area ~~
area. \ s __ Limit_of absorption area. __ _ Existing Dam ( we
—\ a —~“Fpproximate ostion — (Approx. pos.) ) | NN ee
Expected Available Area easonal bully. es
(EAA) oN oS >
‘\ Lo NN \ Provide a minimum 10.0m ge
ea Existing setback from water course 3
\e Shed | \ to surface irragation and
{reserve area. -
10m MIN. Setback from all seasonal / \ So
and existing watercouses and dams \ a £
to Lond Application Areas. / 2 VV A fo, \ &
f \/ \
\
Je so N Existing Dam \ Expected Available Area
Approx. pos.) (EAA)
xistit
Hou: —
\ 10.0m Min. offset from NT
{ \ eo house site to disposal
/ area.
Property boundary
EFFLUENT SUMMARY
Area Size Calculation
General Notes :
1. Do not scale from this drawing.
2. The final position of the disposal area is to be determined on-site in
accordance with the noted minimum offsets, minimum pipe grades and
site constraints.
3. The Plumber is responsible for locating all existing services within and
adjacent the allotment prior to commencing the work.
4. This drawing is to be read in conjunction with the attached details
and the specifications and requirements of Australian Soil Investigations
Absorption Report. No.180061(A). Do not commence construction without
first referring to this report.
5. The installation is to be in strict accordance with AS 1547-2000,
PLAN Application system Advanced Secondary Treatment System 20 Persons @ 115litres per person/
SITE PLAN PLA Disposal system Surface Irrigation per day = 2300 litres x 7 days
Area Required 805 Sq.m 20 ( DIR)
F _ 2
Soil Category Cat 5 = 805m
Water Reduction Fixtures Yes
Surface
Drainage Good. Water Supply On-site Storage Tanks Drawn By : WRHolmes
i i QBCC License. No.112066
Vegetation senes Ss Maximum Population 20 People Australian Soil Investigations
This summary details the parameters for which this system has been designed for. Any variation to the QBCC License No.15072110
parameters may require a redesign of the system to reduce the risk of failure.
Local Authority requirements and Australian Soil Investigations Absorption
Report. No.180061(A).
6. The work is to be undertaken and completed by a registered plumber.
7. Water reduction fixtures are to be used where nominated in the
Effluent Summary below, refer report No. 180061(A) for details.
BH2 .
e Borehole location.
<q 7, Slope
measured as a percentage gradient from
high ground to low ground.
DO NOT DIMENSION OFF THIS DIAGRAM.
Drg No. ABS-001
ABN11 147 854 439
AUSTRALIAN
SOIL INVESTIGATIONS
Title: SITE PLAN - On-Site Effluent Disposal
1/11 PROJECT AVE NOOSAVILLE
Ph 07 54471 304 Email [email protected]
Project S. Keating, 340 Pomona Kin Kin Road,
Pinbarren
Rev.
Date: May 2018 Drg No.180061-ABS
Page 10
Plumbing Services
PO Box 141 TEWANTIN QLD 4565
P(07)5329 6500
[email protected]
SITE EVALUATOR(S )
Wade Holmes SCRC 041
NAME: (Principal Evaluator)……………………………………………………Designation………………….…….....…
Australian Soil Investigations
COMPANY/AGENCY…………………………………………………………………………………..……………….......
1/11 Project Avenue, Noosaville Q 4566
Address…………………………………………………………………………………………………………………..…....
0428 310 453 [email protected]
Phone: (……)……………………..Fax: (……)……………………..Email: ……………………………………….……..
Additional staff involved Name(s):
.………………………………………………………………./………………………………………….…..……………….
Designation(s):…………………………………………… ../……………………………………………..........................
Involvement: ………………………………………………../……………………………………….…………………….…
08/05/2018
SIGNATURE OF EVALUATOR: ……………………………………………. DATE: ……………………………………
SITE INFORMATION
Location Details:
Kin Kin
Locality: ….:………………………………………………………………………………………………………..…..………
Sarah Keating
Owner: ………………………………………………………………………………………………….….………………….
340 Pomona Kin Kin Road, Kin Kin
Address: ………………………………………………………………………………………………………………….……
RP M37911
Phone:(……)………………Fax:(…….)…………………Real Property Description: ….………………………………..
Noosa
Local Authority: .………………………………………………………………………….………………….………….….…
180061-ABS
Site Plan Details Attached (Ref. No. or description):….…………………………………………………………………..
Soil type and major soil consideration from soil maps etc:
………….…………………………………………………………………………………………………………………….…
Climate:
3429
Annual rainfall: ………………..mm
Bureau of Met
Data source used: ………...……………………...…………………………………………………………………………
Intended Water Supply Source:
Public Supply □ Rainwater (roof collection) □x
Photographs(s) or Video attached: (Please tick box) YES □ NO □x . (Specify details):…………………..........
ON-SITE EVALUATION
Work Undertaken:
Site & Soil Assessment
Details: ………………………………………………………………………………………………………………………..
10/04/2018 Showers
Date: …………………. Weather: ……………………………………………………….(on day and proceeding week)
Photocopy of desktop study attached (Please tick box) YES □ □
NO x (Specify details)………………………
Topography:
6%
Slope: ………………………………………………………… Grasses
Ground Cover: ………………………………..………...…
Geology confirm: (Please tick box) YES □ NO □x ……………………………………………………………….....
Soil landscape confirmed: (Please tick box) YES □ NO □
x ………………..………………………………………
Drainage Patterns: ………………………………..……….Site Plan details attached: YES / NO: …….……………….
Clearance :………………………………………………….Site Plan details attached: YES / NO:……………………...
4000mm
Boundaries: ……………………………Allowable Minimum: ………………………. Available: …………………..……
30000mm
Waterways: ……………………………Stands of trees/shrubs: …………………… Wells/bores: ………………….....
15000mm
Embankments: ………….……………. Buildings: ………………………...………………….……………………………
Other (specify): ……………………………………………………………………………………………………………….
Site History (land use): ………………………………………………………………………………...……………………
Environmental concerns (e.g. native plants intolerant of phosphorous load, high watertable, swamp,
waterway, etc): ……………..………………………………………………………………………………………………..
…………………………………………………………………………………………………………………………………
Page 11
Drainage Controls:……………………………………………………………………………….………………………….
□
Depth of seasonal watertable:.......................................................Is groundwater quality an issue? Yes □
No x
Need for cut off drains/diversions banks: …………………………………………………………………….……………
Need for surface water collector/cut off drains: ………………………………………………………………..…………
Treatment plant lid shall be above Q100 flood prone area:……………………………………………………….….…
Availability of reserve/setback areas (show details on sketch plan)
Reserve area available for extensions: ……………………………. % of design area:………………………………. 100%
Photographs attached: YES □ NO □x (specify details):……………………………………………………………….
SOIL INVESTIGATION
Soil Profile Determination: Mark on site plan scaled or dimensioned: …………….……………………………..
Test Pit: □ Borehole: x □
Other: □
Please specify: ………………………..………………………….…
Reporting: (Attach Bore Logs):………………………………………………………………………….…………………
Estimated Soil Category: …………………………………………………………………………………………………
Summary:…………………………………………………………. Permeability:………………. m/day DLR/ DIR
Site Test 1 2 3 4 5 6 7
Soil
Category 5 5 5
GENERAL COMMENTS
Remaining matters of concern are: ………………………………………………………………………………………..
Refer ASI Report 180061(A)
………………………………………………………………………………………………………………..……………….
Type of land application system considered best suited to site and why?…………………………………………….
Advanced Secondary Treatment System & Surface Irrigation - Site & Soil Evaluation
………………………………………………………………………………………………………………………………….
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): ………………………….………..
……………………………………………………………………………………………….……………………………….
Other Comments eg special precautions which may be needed: …………………………..…………………………..
……………………………………………………………………………………………………………..………………….
SUMMARY (all sections must be complete)
Type of System:…………………………………………………………………………………………………………….
Type of Disposal Area ……………………………………………………………………………………………………..
Detail of pipe work……………………………………………………………………………………………………………
Emiiters spacings…………………...Spray spacings……………………….
Manifolds…………………………….Flush out valves………………………………. Air relief valves……………......
Slope at Disposal Area…………………………… % 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:…………………………………………………………………………………………..
Size of diversion mound /Cut of drain:………………………..Size of retention mound:……………………………….
Soil modifications ripped / import soil / mulched / planted (Please circle best description)
ons Bedrooms:………………Equivalent persons:…………DLR, DIR……………Litres/person/day…………………….
Total Load of all system on the property over 20 EP (Please tick box) YES □ NO □
Holding Tank position and size on site plan including pump out line position (Please tick box) YES □ NO □
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