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Wastewater 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]
PROPOSED 3 BEDROOM DWELLING
SITE & SOIL EVALUATION
Lot 1 SP 297286
Area: 111066.68m2
Address: 411 Black Pinch Road, Cootharaba
Date: 28th March 2022
Reference No: NC/2022/AES/411BlackP
INDEX:
1.0 Introduction:
2.0 Site Description: p2 IMPORTANT DIRECTION
Do not install from this design until it is
3.0 Soil Investigation: Stamped and Approved by the Local Authority.
3.3 Soil Classification Council may make changes to this design as part
of the approval process. Only install from Stamped
4.0 Recommendations: p3 Approved Plans and refer to the Approval Permit for
5.0 Design Calculation possible changes.
5.1 AES Infiltration Bed Design: p4
AES Calculator p5
7.0 Design Drawings p6 reuse
7.1 Design Drawings p7
recycle
Borelogs p8 & 9
retrieve
Site Classification p10
Appendix A - Inspection Port p11 C Copyright Lance Picton 2022 design & content. 1/11
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Page 2
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 411 Black Pinch Road, Cootharaba.
The results form the basis of our recommendations for on site wastewater disposal.
Original site investigation and field work was performed on Wednesday 23rd March 2022 after a period of wet 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 3 bedroom dwelling to be moved to the site.
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 approximately 111.066.68m2.
The proposed Land Application Area is moderately sloping (4-6%) to the North-West.
The proposed Land Application Area has very good exposure to sun and wind.
Erosion, mass movement or land slip was not observed on this site. Rock outcrops are not evident on this site.
Vegetation in the proposed Land Application Area currently consists of 100% grass cover.
There are no bores, dams, creeks or waterways on this site or adjoining properties within the required setbacks of the
proposed Advanced Enviro-Septic Bed.
Ground water was not encountered on this site during our investigation to a depth of 2000mm.
Flooding will not occur in the vicinity of the new dwelling and Land Application Area.
There is no evidence of fill in the proposed Land Application Area.
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 moist and there is no evidence of soil surface cracking in the LAA. 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 conducted by Global Testing on 8th March 2019 to a depth of 2000mm.
The soils were visual one textually classified in accordance with Table E1 AS/NZS 1547:2012. The soils were
predominately pale brown in colour. Moderately - Strongly structured Sandy Clays. See bore logs enclosed.
Smooth plastic ball that can be rolled into a rod; slight resistance to shearing between
thumb and forefinger; forms a ribbon 50-75 mm long. Category 5 adopted.
The Site Classification was also conducted by Global Testing and is classed as a “M” site. See page 10. Articulation joints
are therefore not required.
C Copyright Lance Picton 2022 design & content. 2/11
Page 3
3.3 Soil Classification
Soil Classification - Adopted
Borehole Nos 1&2
Soil Category Adopted 5
Indicative Drainage Poorly Drained
Structure Moderately
Texture Sandy Clay
Indicative Permeability P (m/d) as Ksat* 0.06 - 0.12
Recommended DLR (AS/NZS 1547 / 2012) 10
Note: See soil improvements required in LAA Design and Drawings.
4.0 Recommendations:
4.1 Treatment Facility:
The on-site treatment facility to service the new dwelling is to be an Advanced Enviro-Septic System (AES). This
system has a Chief Executive Approval # 15/2019 for Advanced Secondary Effluent. The Person Equivalent (PE) for
this system is to be no less than 5.
A new min 4450lt all purpose septic tank is to be installed and must comply with AS/NZS:1546. The position of the
septic tank on the site plan is indicative.
All wastewater from the new dwelling is to be directed to the new septic tank then to the AES bed.
The Land Application Area is to be an Advanced Enviro-Septic Infiltration Bed of 60m2.
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
DLR (mm/d) (secondary quality effluent) 10
Hydraulic load (lt/day/person) Tank Water / 3 bedrooms 120
Design Flow Q (lt/day) PE: 5 600
Design sizing calculation L = Q /(DLRxW)
= (600 / 10)
Disposal area A+B (square metres) AS/NZS1547:2012 60m2
Nominated Configuration (metres) AES System Design Calculations = 12.6 x 4.76m (L xW) 60m2
A new min 4450L Septic Tank is required. AES System EP 5
C Copyright Lance Picton 2022 design & content. 3/11
Page 4
5.1 AES Infiltration Bed Design. Advanced Enviro-Septic System
The AES Bed Design is to be a gravity fed, below ground system. See system design drawings page 6.
The total bed base required is 60m2 (12.6m x 4.76m). Bed is to be installed as shown on the site plan. See drawings page 6 for
bed profile. A minimum 4m setback is required to any tree.
The layer of Category 6 High Plasticity Sandy Clay soil from 200mm to 1500mm as shown on borelog 3 (page 8) is to be removed
from the bed area and replaced with a Category 5 or better Sandy Soil.
The entire base of the bed is to be ripped 250mm parallel to the pipes and gypsum applied at a rate of 1kg per m2.
Coarse washed sand will be referred to as “system sand” and must meet the specifications of the system manufacturer.
System sand will need to be placed around AES pipework and for the infiltration area as shown on the attached drawings.
System pipe bed dimensions (Area A) are 12.6m x 1.35m and a total minimum sand depth of 750mm. 300mm of course washed
sand is to be spread to form a base and 2 rows of 4 lengths of AES pipes installed as per the attached drawings.
A further infiltration area of 43m2 (12.6m x 3.41m) (Area B) is to be constructed below the pipe bed as per the site drawings and a
minimum of 150mm system sand to be spread over the entire infiltration area.
Pipes are to be covered by a minimum of 150mm of system sand. A further 150mm of site soil is to be mounded over the sand to
prevent surface water entering the bed. After all settlement the AES Bed is to have a minimum 150mm cover of site soil.
Beds are to be constructed in accordance with the AES Design and Installation Manual and all plumbing works in accordance with
the QPW code. All site work is to be carried out by a licenced plumber and all AES horizontal pipes layed with the aid of a laser
or dumpy level to ensure absolute compliance with the manufacturers installation guidelines. This is critical for correct operation.
Oxygen Demand Vents are to be installed as per the AES Design & Installation Manual. The high vent (100mm - on the house)
must be a minimum of 3m higher than the AES low vent and provide unrestricted air flow through the entire system. (See attached
drawing for illustrations.)
Two Inspection Ports are to be installed, one in the centre of the pipe bed and another at the furthest point from the influent to AES
Pipes. See Installation Instructions Appendix A - page 11.
Care must be exercised to prevent machinery access on the AES bed during and after construction.
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
C Copyright Lance Picton 2022 design & content. 4/11
Page 5
ADVANCED ENVIRO-SEPTIC Advanced Enviro-septic Design Calculato “Always The First Option® AES The World Leader in Passive Solutions © Site Address 411 Black Pinch Rd, Cootharaba State QLD Post Code 4565 Client Name Justine Oxley and Matt Pavelich Date of Site Visit Designers , Designers Ph Designer Lie Nene Biowater Design Pty Ltd Noten 07 5494 7620 2OBCO) 1049265 : Plumber Ph Plumb / Drainer Lic Plumber TBA Napber TBA LeNumte TBA Council Area Noosa Designers AES 1 Date 29.03.2022 Cert Number This Calculator is a guide only, receiving soil clas ication, surface water, water tables and all other constraints addressed by the qualified designer. ‘Enter AES L/m loading rate, "30" for ADV Secondary or "38" Secondary 30 >> 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 Bedrooms 3 >> This is not used in ANY Calculation. If not known use N/A or 0. Number of persons 5 >> A septic tank outlet filter is NOT RECOMMENDED Daily Design Flow Allowance Litre/Person/Day 120 Number of rows required to suit site constraints 2 >> The maximum length of a single AES pipe run is 30m or 10 PIPES Infiltration Soil Category from site/soil evaluation. CATEGORY 5 >> Catagory may require design considerations. Ref AS1547 Design Loading Rate based on site & soil evaluation DLR (mm/day) 10 >> Soil conditioning may be necessary. Ref AS1547 & Comments. Bore log depth below system Basal area 1.5m >> Min depth 1.5m. Check water table/restrictive layer Is this design a GRAVITY system with no outlet filter? Y or N Y >> GRAVITY. A House Vent & LOW VENT required on this PLEASE CHECK YOU HAVE FALL FROM TANK TO AES SYSTEM PIPES COMMENTS :- " The outcome must be important to everyone. - Ripping of receiving surface required in clay soil structures in Cat 4,5,6. In addition refer to AS 1547. Always excavate & rip parallel to the site slope/AES pipe. - Specialist soils advice & special design techniques will be required for day dominated soil having dispersive or shrink/swell behaviour. Refer AS1547 - Designers need to be familar with special requirements of Local Authorities. ie - Minimum falls from Septic tank outlets to Land application areas ete - Plumbers are reminded good construction techniques as per AS1547 are especilly important in these soil types. Refer AS1547 & AES installation Instructions r dimensions Total System load - litres / day (Q). 600d AES System | System Extension Min Length of AES pipe rows to treat loading 10.25 Im Length:(L) 12.60m 12.60m Number of FULL AES Pipe lengths per row 4 Iths Width:(W) 1.35m 3.41m Sand 75) 151 Total Capacity of AES System pipe in Litres 1696 Ite. Denth: 0.75m 0.15m ‘Aream2 | 17.0 m2 43.0 m2 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/ (DLR x W) Length Width Minimum AES foot print required for this Basic Serial design is 12.600m x 4.76m, = 60.0 m2 total AES pipes are best centered in the trench parallel to the site slope AES System Bill of Materials. etre Ne ORO AES-PIPE AES 3 metre Lengths required 8 Iths: AESC AES Couplings required 6 ea AESO. AES Offset adaptors 4 ea BON Cc AESODV AES Oxygen demand vent 1 ea “Nature's Wastewater Solutions” AES-IPB AES 100mm Inspection point base 2 ea TD Kit 4 4 Hole Distribution Box Kit ca TD Kit 7 7 Hole Distribution Box Kit ea Digitally signed by Steve Dennis VS43-4 Sweet Air Filter VS43-4 ca DN: cn=Steve Dennis, o=Chankar! AES DESO Double Offset Adaptors a Enviromental, ou=Design | Review, email=steve@enviro- TOTAL SYSTEM SAND REQUIRED (Estimate Only) 23 m3 septic.com.au, c=US Please email your AES Calculator (EXCEL FORMAT), Site Layout & AES Design to Date: 2022.03.28 11:05:53 +10'00' designreview@enviro-septic com a designreview@enviro-septic. coma > The AES Calculator is a design aid to allow checking of the AES components, configuration and is a guide only. Site and soil conditions referencing ASIS47 are calculated and designed by a Qualified Wastewater Designer > Chankar Environmental accepts 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 lengths only > AES ONLY supply AES components as detailed in the Bill of Materials. > SEPTIC Tank & other components including SAND will need to be sourced from other suppliers. Refer to our WEBSITE www .enviro-septic.com.au OR 07 5474 4055 AES -Design-V9.0-Calculator © Copy Right - Chankar Environmental Pty Ltd 20/1/2022 5/11
Page 6
7.0 Design Drawings level
Inspection Port to be installed
This plan is Site Specific for 411 Black Pinch Rd, Cootharaba. between AES Pipes - see
AES pipe pack sand
Appendix Page 11
under
for installation instructions
12.6m
12m
Inlet
1350mm
Inspection Port
Low Vent
4760mm
300mm
Area A
Ground level
Area B Infiltration Extension Area
12.6m x 3410m x 150mm system sand.
Entire bed base is to be ripped
250mm parallel to AES Pipes
Inspection Port to be installed
Gypsum applied at 1kg / m2.
at furthest point from Influent
Note: See Site Plan for position and orientation. to AES Pipes - see Appendix Page 11
for installation instructions
NOT to Scale
Inspection Port
AES pipe Imported sand (course washed)
150mm
Inspection Port 300mm Backfill with site soil min 150mm cover over sand
IMPORTANT DIRECTION and mound soil over bed to prevent water access.
Do not install from this design until it is
300mm Stamped and Approved by the Local Authority. Natural Ground Level
300mm
Council may make changes to this design as part 150mm approx 6% Inspection Port
8/9 of the approval process. Only install from Stamped
9/9300mm 150mm
Sand Approved Plans and refer to the Approval Permit for 150mm
possible changes. Note: See Site Plan for position and orientation.
AES Sand Coverage Minimums
300mm
300mm
IMPORTANT NOTES PLEASE READ.
1500
RIP PARALLEL TO PIPES 250mm AND GYPSUM 1KG / M2
The installer MUST refer to the Advanced Enviro-Septic Design & Installation
Manual provided. If you do not have a copy of this manual please contact Chankar
Environmental and a copy will be emailed FREE. 1350mm 3410mm Scale 1:25 @ A3
Sections C, D, & E of the Design and Installation Manual are of particular relevance Remove Category 6 soils and replace with Category 5 or better.
when installing an Advanced Enviro-Septic System.
THIS IS NOT A SEPTIC TRENCH AND MUST BE INSTALLED AS PER THE
AES DESIGN AND INSTALLATION MANUAL GUIDELINES. Category 5 soils
Ensure you have the correct sand and all fittings to complete the installation if you
are unsure of anything please contact Chankar Environmental (07) 54 744 055 or
Biowater Designs 54 947 620. Note: Category 5 soils can be obtained from a “Loan Pit” on site and filled with the Category 6 soil excavated from the AES bed..
C Lance Picton 2022 all rights reserved 6/11
Page 7
SITE PLAN; This design is site specific for 411 Black Pinch Rd, Cootharaba.
Site Area 111066.68m2
AES system 60m2 see Design Drawings
for site specific detail.
4.
76
m
m
.6
Location Insert
12
4.5m
BH#3
4450L septic
tank (indicative position)
Take drains to
Blac far end.
k Pinc
h BH#4 Low vent /
Rd
inlet this end.
Driveway
Access
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.
In the event that the site conditions change or
the proposed development is altered in any way,
this office is to be notified to determine what if any
affect they may have on this design. Should a
re-design be required, further fees may apply.
C Lance Picton 2022 all rights reserved 7/11
IMPORTANT DIRECTION Plan of: Client: This plan to be read in conjunction with the All works must comply with AS/NZS1547:2012
Biowater Designs Pty Ltd
Do not install from this design until it is Lot 1 SP 297286 Justine Oxley and attached report. and the Qld Plumbing and Wastewater code.
PO Box 6218
Stamped and Approved by the Local Authority. Matt Pavelich. Clients live The proposed Land Application Area must be
Mooloolah Valley Q 4553
installed and positioned as per this plan.
Council may make changes to this design as part N Ph: 07 54 947 620 411 Black Pinch Rd. in Canada only contact is via
[email protected] Construction of any permanent structures
of the approval process. Only install from Stamped Mob: 0407 887 321 Cootharaba
Approved Plans and refer to the Approval Permit for within the designated area is prohibited.
Site Classifier: Date: SCALE: Site Area: 111066.68m2
possible changes. Local Authority: Care must be taken to ensure no traffic or fill
Lance Picton jp Approx 1:300 @ A3 Land Application Area: 60m2
Noosa 28.03.2022 in the designated area during construction.
QBCC Lic 1049265
Page 8
GLOBAL TESTING THE ONLY NAME IN SOILS SOIL PROFILE REPORT CLIENT: Justine Oxley AUTHORIZED Justine Oxley BY: PROJECT: 411 Black Pinch Rd. DATE TESTED: 05/03/19 Cootharaba. JOB NO: 19/0161 Drilling Method: Jacro 105 100mm Borehole No: 3 Depth Description bic Comments = i 0 SANDY CLAY (CL)- Low plasticity. pale brown, fine to coarse sand, moist, 100 stiff. 200 SANDY CLAY (CH)- High plasticity. 300 pale brown. fine to coarse sand, moist. stiff. 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 SANDY CLAY (CL)- Low plasticity. pale brown, fine to coarse sand_ moist. stiff. 1600 1700 1800 1900 2000 Hole Terminated. 2100 2200 2300 2400 2500 Borelogeme m accordance with AS1 726-1993 Site Invesnganon Code 19/0161-adr Page 4 8/11
Page 9
GLOBAL TESTING THE ONLY NAME IN SOILS SOIL PROFILE REPORT CLIENT: PROJECT: Justine Oxley AUTHORIZED BY: 411 Black Pinch Rd, DATE TESTED: Cootharaba. JOB NO: Justine Oxley 03/03/19 19/0161 Drilling Method: Jacro 105 100mm Borehole No: 4 Depth (mm) Description PENET. (blows per 100mm) Comments 0 100 200 300 400 500 600 - / 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 SANDY CLAY (CL)- Low plasticity. pale brown, fine to coarse sand. moist. stiff. SANDY CLAY (CH)- High plasticity. pale brown, fine to coarse sand_ moist. stiff. Hole Terminated. Borelogaing im accordance with AS1726-1993 Site Investigation Code ~ 19/0161-adr Page 5 9/11
Page 10
GLOBAL TESTING THE ONLY NAME IN SOILS QBCC Licence No. 1018403 PH: 07 54 740 900 3/53 Gateway Drive, Noosaville 4566 Email: [email protected] | 19/0161 SITE CLASSIFICATION REPORT | JUSTINE OXLEY. PROPOSED RESIDENCE. _| 411 BLACK PINCH ROAD, COOTHARABA. | 07/03/19 1. INTRODUCTION The purpose of this report is to classify the subject allotment in accordance with Australian Standard 2870 - 2011 Residential Slabs and Footings’. From this classification, a footing system can be recommended for the structure so as to allow adequate performance of the footings under the soil conditions determined at the site. Trees: There are scattered medium sized trees adjacent to the proposed site. Global Testing recommends an experienced arborist be commissioned to quantify the existing size, location, predicted maximum height and type of these trees to aid in the design process. It is the responsibility of the designing engineer to apply the principals of AS2870-2011 Appendix H "Guide to Design of Footings for Trees". The classification herein excludes the effect of trees on the site. 2. SITE DESCRIPTION Type of Allotment Acreage Vegetation (Building Envelope) Grassed Vegetation (Allotment) Grassed/ Scattered undergrowth’ Scattered large sized mature trees Road Status Unsealed Slope 11-14% slope Surface Water will Drain Towards North Will Surface Water from adjoining No allotments traverse this site? Does the site have any watercourses Yes — Intermittent watercourses downhill Surrounding Allotments Left Acreage Right Acreage Rear Acreage Depth to Weathered Rock Nia Depth to Water Table Nia 3. SITE CLASSIFICATION AND TARGET STRATA Based on the findings of the site investigation, the classification of the site is considered to conform to: CLASS “ M" im accordance with Australian Standard 2870 - 2011. ‘Residential Slabs and Footings. Construction’. Page | 1 Borelogging in accordance with AS1726-2017 Geotechnical Site Investigations Code 19/0161 10/11
Page 11
11/11
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Appendix A - Inspection Port Installation
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