Original source · versioned page text
Effluent disposal report
iDesign
wastewater solutions
Sunshine Coast Office
PO Box 6218
Mooloolah Valley Q4553
P. 0407 887 321
Biowater Designs Pty Ltd QBCC Lic 1049265 E. [email protected]
NEW DWELLING
&
SHED WITH AMENITIES
SITE & SOIL EVALUATION
Lot 3 SP 266744
Area: 2.244ha
Address: 5 Figbird Ct, Lake McDonald
Date: 26th September 2019
Reference No: Figbird/5/2019
INDEX:
1.0 Introduction:
2.0 Site Description: p2
3.0 Soil Investigation:
3.3 Soil Classification
4.0 Recommendations: p3
5.0 Design Calculation IMPORTANT DIRECTION
5.1 LAA Design: p4 Do not install from this design until it is
Stamped and Approved by the Local Authority.
p5 Council may make changes to this design as part reuse
6.0 Site Plan
of the approval process. Only install from Stamped
Contour Plan p6 Approved Plans and refer to the Approval Permit for recycle
Site Classification p7 possible changes.
retrieve
Articulation Joints Illustration p8
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1.0 Introduction:
Biowater Designs Pty Ltd, in accordance with AS/NZS1547-2012 ( Domestic Wastewater Management ) and the
Queensland Plumbing & Wastewater code (QPW) 2019 Version 1, was commissioned to undertake a Site & Soil
Evaluation in the Noosa Council at 5 Figbird Ct, Lake McDonald.
The results form the basis of our recommendations for on site wastewater disposal.
Our Site investigation and field work was performed on Wednesday 25th September 2019 after a period of dry weather.
The investigation was undertaken to determine the soil profile and Long Term Acceptance Rate (LTAR) of the site in
order to accommodate a proposed new 5 bedroom dwelling and shed with possible amenities.
NOTE: This evaluation was undertaken at the owner’s request after considerable discussion regarding environmental
issues of this site and preferred design of the Land Application Area.
.
2.0 Site Description:
2.1 Existing Buildings: None
2.2 Site Factors:
The site is an acreage allotment the area is 2.244ha.
The site borders Lake McDonald at the rear. The proposed Land Application Area is at the front of the site and slopes
away from the lake.
The proposed Land Application Area is moderately sloping (5%) to the South-West.
The proposed Land Application Area has fair exposure to sun and wind due to large trees in the owners preferred
location. Area oversized to compensate for fair exposure. Very good nutrient uptake.
Erosion, mass movement or land slip was not observed on this site. Rock outcrops are not evident on this site.
There are no creeks, or bores on this site or adjoining properties within the required setbacks of the proposed Land
Application Area for Advanced Secondary class effluent.
There is a dam and grassed depression towards the rear of the property. Setback requirements under QPW Code for
Advanced Secondary Effluent can be easily obtained.
Ground water was not encountered on this site during our investigation to a depth of 900mm.
There is no fill in the proposed Land Application Area.
Flooding will not occur on this site.
Rain water will transverse this site from adjoining properties during heavy rains.
Concentrated run-off from this property will transverse adjoining properties during heavy rains.
Soils were dry and there is no evidence of soil surface cracking. No evidence of compaction or seepage areas. Salinity
is not evident.
3.0 Soil Investigation:
3.1 Drainage Pattern: Linear Planar
3.2 Method:
Soil Testing for the site was with a hand auger on 25/09/2019 to a depth of 900mm in the proposed Land Application Area.
The existing soils were visual one textually classified in accordance with AS/NZS 1547:2012 Table E1. The soils
were predominately grey/brown in colour. Weakly structured Loamy Sand - Category 2.
Slight coherence; forms a fragile cast that just bears handling; gives a very short
5mm ribbon that breaks easily; discolours the fingers.
Site Classification was conducted by DEQ (Design Engineers Queensland) and give a Slab Type “M” and classification “P”,
due to trees of potential influence. Articulated joints may be required and must be designed by a qualified person.
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Page 3
3.3 Soil Classification
BORE HOLE #1 BORE HOLE #2
Depth Texture Structure Colour CAT Depth Texture Structure Colour CAT
0- 0- Loamy Sand Weakly Grey
Loamy Sand Weakly Grey 2 2
500 500
500- 500-
Loamy Sand Weakly Grey 2 Loamy Sand Weakly Grey 2
900 900
Moist N Water No Rock No Moist Y Water No Rock No
Soil Classification Adopted - Conservative Rate due to fair exposure
Borehole Nos 1&2
Soil Category Adopted 3
Indicative Drainage Well Drained
Structure Weakly
Texture Loamy Sand
Indicative Permeability P (m/d) as Ksat* 0.5 - 1.5
Recommended DIR (AS/NZS 1547 / 2012 - Table M1) 4
4.0 Recommendations:
4.1 Treatment Facility:
The on-site treatment facility is to be a Wastewater Treatment System consistently producing Advanced Secondary
Quality Effluent with a capacity of no less than 10 Equivalent Persons (10EP).
The owner has indicated their preferred system is the Earth Safe D10 Advanced Secondary (Concrete) system - TPA #
03/2019. A tall tank and possible riser ring may be required. The chosen systems approvals meet the Effluent Quality
and Equivalent Person recommendations for this site. Failure to comply may require the system to be removed from
site.
All wastewater from the new dwelling and any future amenities in the shed are to be directed to the Wastewater
Treatment Plant.
Position of the proposed Land Application Area is shown on the Site Plan. All works must comply with the Qld
Plumbing and Wastewater Code and be performed by a licenced plumber.
5.0 Design Calculation
The serviceable life of the Land Application Area will be compromised if the design flow is exceeded. Any
proposed changes to the position of the Land Application Area, System Type or House Design will require a
reassessment of this site. For our calculations we have assessed the design flow as follows:
Design Calculation
DIR (mm/d) (secondary quality effluent) 4
Hydraulic load (lt/day/person) Tank Water / 5 bedrooms 120
Design Flow Q (lt/day) PE: 8 960
Design sizing calculation Ai = (Q)/DIR
= (960)/4
Disposal area A+B (square metres) AS/NZS1547:2012 Min 240m2
Nominated Configuration (metres) 24m x 10.2m
A new Advanced Secondary HSTP is required: 10 EP
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Page 4
5.1 Land Application Area Design:
The minimum Land Application Area required is 240m2. 244.8m2 is allocated. 100% reserve area available on this site.
The Land Application Area is situated in a heavily vegetated area at the front of the site.
The preferred method of dispersal is Surface Irrigation via FIXED sprinklers (Wobblers). See typical drawing for detail
page 5.
An area 24m x 10.2m to be set out as shown on the drawing and three (3) rows of seven - (21) fixed sprinklers be
installed. Laterals to be laid on top of the ground and pinned into position. Wobblers to be installed on 400mm risers
and an inline valve installed on each riser to control plumage. Risers must be kept vertically plumb and supported by a
galvanised rod. See drawing for detail.
A three (3) stage indexing valve (K-Rain) to be installed to service each bank of sprinklers alternatively.
Installer is to ensure that a suitable sized irrigation pump is installed in the system to ensure correct operation of the
irrigation area. Min 25m head.
Laterals to be 25mm PN12.5 to provide sufficient flow to operate each bank sprinklers.
In accordance with the Noosa Council stipulated guidelines, the treated effluent must not at any time extend beyond the
approved designated area.
A 120 micron filter is to be installed in the delivery line at the tank. A non-return valve to be installed in the delivery line
after the filter to prevent back flow when servicing the filter. This filter is to be cleaned at every service interval.
The Land Application Area is to be maintained to ensure survival of plants and adequate mulch cover is sustained.
Delivery line (32mm PN12.5) is to be buried a minimum of 200mm and pipework to comply with AS/NZS 1547/2012
and QPW Code.
Two warning signs are to be installed at the land application area.
6.0 Setback Regulations:
Secondary Advanced Secondary
Recommended Separations Distances - Surface Irrigation
Effluent Effluent
Dwellings & recreation areas 10m 10m
Water edge of swimming pools 6m 6m
Property boundaries, paths & walkways 2m uphill 2m uphill
4m down hill 4m down hill
Top of bank of permanent water course, creek, lake, waterway etc. 30m 10m
Bore or Dam for domestic or stock use 30m 10m
Vertical depth of seasonal water table 0.6m 0.3m
In ground potable water tank. Note some authorities require 15m 6m 6m
Sub-Surface Irrigation same as above except for;
Dwelling & recreation areas 4m 4m
NOTE: The local government authority may upon considering the public health and environmental risks
reduce or increase the distances in the above table.
Regards,
Lance Picton jp.
Site Classifier
QBCC Lic: 1049265
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Page 5
7.0 SITE PLAN. This plan is site specific for; 5 Figbird Court, Lake McDonald
Notes: This report is based on information and
plans provided by the owner in addition to the
site information at the time of investigation.
It does not take into account any event, whether
by human intervention and/or by nature that occurs
after the date of the site investigation which affects
the results and findings contained within this report.
Proposed driveway In the event that the site conditions change or
(indicative position) the proposed development is altered in any way,
Earth Safe SC HH this office is to be notified to determine what if any
D10 (concrete)
TPA#03/2019
affect they may have on this design. Should a
re-design be required, further fees may apply.
In-ground concrete
ea
water tanks.
t
ar
ur
ed
Co
tat
18
ge
ird
m
ve
gb
of
Fi
ge
m
10
Ed
Filter
10 Bury 32mm
.2 delivery line min
BH#2 m
200mm
m
Proposed shed
24
68
5m with amenities
00
7.5x10m
0
BH#1
m
11
Land Application Area
240m2 Fixed Sprinklers
See detail below.
Slope 5%
Proposed 5
bedroom dwelling
5
32
11
17
80
00
Fixed Sprinkler Design
Wobbler
Sprinkler
In-line valves Heads
400mm
to control plumage
& isolate banks
Min 100mm mulch
Galvanized
Ground level
stake
1.7 3.4
3.4
BH#2 3 stage Lake McDonald
Indexing Valve
Valve box
10.2m
BH#1 32mm lilac stripe
delivery line
24m IMPORTANT DIRECTION
Do not install from this design until it is
Stamped and Approved by the Local Authority.
Council may make changes to this design as part
of the approval process. Only install from Stamped
N
Approved Plans and refer to the Approval Permit for
possible changes.
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C Copyright Lance Picton 2019 design & content.
Biowater Designs Pty Ltd Plan of: Client: This plan to be read in conjunction with the
All plumbing works to be performed by a licenced plumber
PO Box 6218 Lot 3 SP 266744 Brendan Bedford attached report.
and must comply with the Queensland Plumbing &
Mooloolah Valley Q 4553 5 Figbird Ct, Ph: 0439 717 700 The proposed Land Application Area must be
Wastewater code. LAA setbacks must comply with
Ph: 07 54 947 620 Lake McDonald installed and positioned as per this plan.
QPW Code as setout on page 4 of this report.
M: 0407 887 321 Construction of any permanent structures
within the designated area is prohibited.
Site Classifier: SCALE: Site Area: 2.244ha
Local Authority: Date: Care must be taken to ensure no traffic or fill
Lance Picton jp Site Plan: 1:1000 @ A3 LA A: 244m2
Noosa Council 26/09/19 in the designated area during construction.
QBCC Lic 1049265
Page 6
Contour Plan
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Page 7
7/8 [OCR of page images] DESIGN ENGINEERS QUEENSLAND SITE CLASSIFICATION REPORT Client: Ausmar Homes Job No: 19.2841 Revision: - Date of Report: 12th August 2019 Address: LOT 3 (#5) FIGBIRD COURT, LAKE MACDONALD SITE CLASSIFICATION Classification: P Due to trees of potential influence Slab type: M ys (mm): 20-40 In accordance with AS2870-2011 WIND CLASSIFICATION N3 In accordance with AS4055-2012 This is a preliminary site investigation for Ausmar Homes use only. This report is for internal costing purposes and not suitable for design purposes or council submission as specific details of the intended build have not been received at the time of this report. #5 Parkview Street, Milton 4064 PH: 33670211 Email: [email protected] DEQ Consulting Pty Ltdt/a ABN 53 065 711 248 718
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Illustration Only: Articulated Plumbing Joints
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Illustration Only: Articulated Plumbing Joints
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