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18164 - SBSMP - Rev 0
Attached to the e-mail Operation Works Application - OPW19/0266 - 215 David Low Way, Peregian Beach - (EMAIL 2/3) - Site Based Stormwater Management Plan, Acid Sulphate Soil & Groundwater Management Plan.
SITE BASED STORMWATER
MANAGEMENT PLAN
PROPOSED RECONFIGURATION OF A LOT AND
MIXED USE DEVELOPMENT AT
215 DAVID LOW WAY
PEREGIAN BEACH
Prepared for
Thomco (No. 2087) Pty Ltd
Attention: Tony Scanlon
Document Reference
18164 - SBSMP/0
Record of Issue:
Issue Status Author Date Checked Date Authorised Date
25 Nov Christopher 26 Nov Henry Morgan 26 Nov
0 For Approval Darren Yuen
2019 Godwin 2019 RPEQ 11950 2019
This investigation and report has been authorised by Mr Henry Morgan, a Director of Morgan
Consulting Engineers Pty Ltd.
Henry J Morgan RPEQ 11950 Tuesday, 26 November 2019
D:\JOBS\18-Jobs\18164 - 215 David Low Way, Peregian Beach\Civil\Reports\SBSMP\Current\18164 - SBSMP - Rev 0.docx
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Table of Contents
1 INTRODUCTION ........................................................................................... 3
2 EXISTING SITE............................................................................................. 4
2.1 The Site ............................................................................................... 4
2.2 Surrounding Area ..................................................................................... 4
3 PROPOSED DEVELOPMENT .............................................................................. 5
4 EXISTING DRAINAGE PATTERNS ........................................................................ 6
4.1 Existing Infrastructure .............................................................................. 6
4.2 Existing Drainage Patterns .......................................................................... 7
4.3 Lawful Point of Discharge........................................................................... 7
5 STORMWATER QUANTITY................................................................................ 8
5.1 Detention Assessment ............................................................................... 8
5.2 Proposed Drainage Patterns ........................................................................ 8
6 STORMWATER QUALITY ................................................................................. 9
6.1 State Planning Policy Assessment ................................................................. 9
6.2 Construction Phase .................................................................................. 9
6.3 Operational Phase .................................................................................. 11
6.3.1 Sources of Contaminants ..................................................................... 11
6.3.2 Proposed Treatment Train ................................................................... 11
6.3.3 Pollutant Export Modelling ................................................................... 12
6.3.4 MUSIC Modelling Parameters ................................................................. 12
6.3.5 MUSIC Modelling Results ...................................................................... 13
7 CONCLUSION ............................................................................................. 15
Appendix A DETAILED SITE SURVEY PLAN ................................................................. 16
Appendix B PROPOSED SUBDIVISION AND DEVELOPMENT PLANS ...................................... 17
Appendix C DBYD PLANS .................................................................................... 18
Appendix D SITEWORKS AND DRAINAGE PLANS........................................................... 19
Appendix E BIO-RETENTION OPERATIONAL MANAGEMENT AND MAINTENANCE GUIDELINES ....... 20
Appendix F BIO-RETENTION BASIN DESIGN CHECKLIST AND CALCULATIONS ......................... 21
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
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1 INTRODUCTION
This Site Based Stormwater Management Plan (SBSMP) has been prepared for the proposed
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach, to
investigate impacts the development will have on stormwater quantity and quality as supporting
documentation for the operational works application.
The objective of this SBSMP is to confirm the development will not impact environmental value
of the receiving waters throughout construction and operational phases of the development. This
SBSMP will also confirm the mitigation measures to ensure post development peak outflow
conditions are less than pre development peak outflow conditions.
In order to achieve this objective, this SBSMP:
1. Describes the environmental setting of the development site and precinct;
2. Describes the nature of the proposed development as it relates to stormwater quality;
3. Confirms the detention volume designed to achieve the pre development outflow in the
post development state; and
4. Identifies potential sources of contaminants and describes site management techniques
designed to achieve the site specific water quality objectives.
The proposed development has been assessed against the following guidelines and planning
documents:
1. State Planning Policy 2017 (SPP 2017);
2. Urban Stormwater Quality Planning Guidelines 2010;
3. The Queensland Urban Drainage Manual (QUDM); and
4. The Noosa Plan Planning Scheme Policies, Standards and Codes.
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
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2 EXISTING SITE
2.1 The Site
The subject site, comprising of Lot 77 SP231615, is approximately 23,119m2 (2.312ha) in area. The
south eastern portion of the site is currently occupied by an existing shopping centre complex
consisting of approximately 5,798m2 (0.58ha) in area. The remainder of the site, which will be the
subject of the proposed development, is comprised of short grass and scattered trees, with dense
vegetation concentrated along the western boundary.
The proposed development area generally slopes from the east (with an approximate elevation of
9.79m AHD) to the west (with an approximate elevation of 2.12m AHD). Vehicular access to the
proposed development area is provided by an existing driveway crossover from Sandpiper Court,
south of the site, via the existing shopping centre complex.
Refer to Figure 2.1 for a Locality Plan and Appendix A for the Detailed Site Survey.
Council Reserve
N
Proposed
Development
Area
Existing
Shopping
Centre
Sandpiper Court
Figure 2.1 – Locality Plan of Site and Surrounding Area
2.2 Surrounding Area
The site is located within the limits of the Noosa Council region under the Eastern Beaches Locality
Plan, and is classified as Open Space Recreation. The site is surrounded by commercial properties
in its immediate vicinity and nature reserve to the west. Semi attached and detached housing
zoned properties are located further to the north and south of the subject site. The Coral Sea is
located to the east of the subject site.
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
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3 PROPOSED DEVELOPMENT
The proposed Reconfiguration of a Lot and Mixed Use Development primarily involves:
1. A 1 into 3 lot subdivision;
2. A three storey hotel consisting of 32 units, undercover ground floor parking and vehicular
manoeuvring areas;
3. 20 detached residential dwellings;
4. New internal roads providing access into the development via the existing shopping centre
complex;
5. Dedicated landscaping areas located throughout the proposed development area; and
6. 5,275m2 of land dedicated to Council as reserve along the western portion of the site.
Refer to Appendix B for the Proposed Subdivision and Development Plans.
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
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4 EXISTING DRAINAGE PATTERNS
4.1 Existing Infrastructure
Data obtained from the detailed site survey and Dial Before You Dig (DBYD) plans indicate the
following existing drainage infrastructure:
1. A 375mm diameter stormwater main traversing the carriageways of David Low Way and
Sandpiper Court, with a headwall outlet into the nature reserve, south of the subject site;
2. An easement abutting the northern and western boundary of the existing shopping centre
complex within the site, containing a stormwater main ranging from 300mm to 450mm in
diameter, with a headwall outlet into the nature reserve, south of the subject site;
3. A series of stormwater pipes and gully pits directing runoff from the shopping centre
complex to a detention tank and a bio-retention basin prior to discharge to the nature
reserve, south of the subject site;
Refer to Figure 4.1 for the existing stormwater infrastructure and drainage patterns.
N
Proposed
Development
Area
Legend
Sheet Flow Path
Stormwater Pipe
Stormwater Manhole
Stormwater Gully Pit
Headwall Outlet
Figure 4.1 – Existing Drainage Paths & Infrastructure
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
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4.2 Existing Drainage Patterns
Data obtained from the detailed site survey and Dial Before You Dig (DBYD) plans indicate the
proposed development area has the following drainage patterns:
Surface Runoff
Surface runoff from the proposed development area sheet flows west to the nature reserve.
External Catchment
The upstream site on 223 David Low Way is serviced by the existing 300mm to 450mm diameter
stormwater main located within the easement traversing the site. Therefore no further
consideration of the upstream catchment is required.
Refer to Appendix A for the detailed site survey and Appendix C for the DBYD plans.
4.3 Lawful Point of Discharge
If the proposed development maintains pre development flow conditions, the lawful point of
discharge (LPD) is the nature reserve, west of the site.
In consideration of the site characteristics, surrounding topology and stormwater drainage
infrastructure, the aforementioned proposed lawful point of discharge is considered to be
compliant with the criteria for lawful point of discharge outlined in Section 3.9.1. of QUDM 2017
as per below:
i) The location of the proposed discharge point is under the lawful control of the local
government or other statutory authority from whom permission to discharge has been
received.
ii) The post development discharge will not cause an actionable nuisance, nor environmental
or property damage, as it is intended to implement mitigation measures to account for
any change to the existing flow characteristics.
iii) Authority to discharge over affected properties will not be required as the proposed
drainage patterns will maintain existing drainage patterns, which will not impact
surrounding properties.
Refer to Section 5 outlining the Stormwater Quantity aspects of this site.
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
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5 STORMWATER QUANTITY
A roof and allotment drainage system has been designed to comply with:
1. AS/NZS 3500.3:2015 - Plumbing and Drainage Part 3: Stormwater Drainage;
2. The Queensland Urban Drainage Manual (QUDM), and;
3. The Noosa Plan Planning Scheme Policy PSP05.
5.1 Detention Assessment
The Stormwater Management Plan (SMP) prepared by SLR Consulting dated March 2018 (Ref No.
620.12292-R01) details a proposed detention tank arrangement required to ensure that the
proposed development will not worsen peak outflows from the proposed development area. The
detention requirements of the aforementioned SMP have been incorporated into the Siteworks and
Drainage Plans prepared by Morgan Consulting Engineers.
Refer to Appendix D for the Siteworks and Drainage Plans and Section 6 for the Stormwater
Quality Management assessment.
5.2 Proposed Drainage Patterns
The proposed drainage patterns are as follows (refer to Appendix D for the Siteworks and Drainage
Plans):
Roof Catchment:
1. Roofwater runoff from each proposed residential dwelling will flow via downpipes to a 3kL
water reuse tank with overflow to the internal drainage network, where it will be directed
to an underground detention tank prior to being discharged to the Lawful Point of
Discharge.
2. First flush roofwater runoff from the proposed hotel building will flow via downpipes to
the internal drainage network, where it will be directed to an underground detention tank
prior to being discharged to the Lawful Point of Discharge.
3. Roofwater runoff from the proposed hotel building, exceeding first flush, will flow via
downpipes to an underground 200kL water reuse tank, with overflow directed to an
underground detention tank prior to being discharged to the Lawful Point of Discharge.
Ground Catchment:
1. Surface runoff from the proposed residential properties and road surface will be collected
by the internal drainage network, where it will be directed to an underground detention
tank prior to being discharged to the Lawful Point of Discharge.
2. Surface runoff from the proposed hotel development will be collected by various
stormwater pits and flow to an underground 200kL water reuse tank, with overflow
directed to an underground detention tank prior to being discharged to the Lawful Point
of Discharge.
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
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6 STORMWATER QUALITY
The following section of the report will outline the potential contaminants and proposed solutions
to be incorporated during the construction and operational phases of the proposed development.
6.1 State Planning Policy Assessment
The purpose of this sub section is to determine if State Planning Policy (SPP 2017) stormwater
quality requirements, as set out by the Department of Environment and Resource Management,
will be triggered for this development. Refer to Table 6-1 for the State Planning Policy Checklist
for stormwater quality.
Table 6-1 – State Planning Policy Checklist
Material Change of Use (MCU) Y/N?
MCU for an urban purpose that involves premises ≥ 2500m2 Y
AND
Will result in 6 or more dwellings
N
OR
Will result in impervious area greater than 25% of the net developable area.
Y
The development has been assessed against the latest State Planning Policy 2017 (SPP 2017). The
proposed development will entail the material change of use for urban purposes, which will
involve a land area greater than 2,500m2. Consequently, State Planning Policy 2017 (SPP 2017) is
triggered.
6.2 Construction Phase
Sediment generated during the construction phase shall be dealt with in accordance with an
Erosion and Sediment Control Plan and kept on site during the construction phase.
Erosion and Sediment Control (ESC) Measures such as silt fences, diversion drains, drainage
structure protection and dust control (clearing) will be implemented. Silt fences are to be erected
along the boundary of the site and around the construction area. These fences are to be cleaned
by the contractor when the capacity is reduced by 25%. Where possible, disturbance to the existing
surface is to be limited to the immediate work area. The existing ground cover is not to be stripped
until the contractor is ready for earthworks to begin.
Stockpiles and construction materials are not permitted to be stored within the road reserve and
should be contained using silt fences. Diversion drains are to be provided at upstream catchments
to reduce flows to earthworks areas. In any areas where flows could enter adjacent properties
temporary stabilisation is to be provided.
All ESC measures are to be provided as soon as earthworks have commenced and staged to suit
construction. The contractor is responsible for this action. A temporary construction exit is to be
located at each entry point to the site and will be determined based on the stage of works being
completed. The contractor is to ensure all dust tracked onto surrounding roads is immediately
swept to remove silt/dust.
All new stormwater pits are to be protected from sediment infiltration by wrapping new pits and
grates in geofabric or covering appropriately with timber board. Silt fences are to remain in place
during the maintenance period until the site is established (80% ground cover) and accepted "On
Maintenance" by Noosa Council.
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
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Potential sources of contaminants identified for the construction phase of the development are
outlined in Table 6.2 together with proposed stormwater quality improvement devices,
management and maintenance procedures.
Table 6.2 - Potential Contaminants and Proposed Treatments
Management / Proposed Treatment Device
Pollutant Potential Source
Maintenance Procedures and Maintenance Procedure
Sediment & Excavated Provision of sediment and Sand filled filter socks.
Eroded material, fill silt barriers to the site Removal of excess sand/silt
material material, exposed drainage entry and exit build-up at regular
ground, stockpiles points. intervals and after every
of material. storm.
Dust Stockpiles of Covering the material or Coverage of material with
material, exposed wetting it down at regular plastic, geotextile, surface
ground. intervals. binding agents or regular
watering.
Litter Refuse generated Construction waste is to Industrial bin is to be
by staff. be cleaned off the site provided within the
area and disposed of into construction area - to be
an industrial bin then emptied on at least a
removed by a refuse weekly basis.
collection contractor.
Concrete Washing of Provision of a closed area Liquids to be removed by a
concrete onsite for washing off of waste collection
trucks/tools to concrete slurries. contractor. Solids to be
remove placed into a refuse bin.
wet/unused
concrete.
Surfactants Washing down No cleaning of vehicles Monitoring & prevention
(detergents) operations on will be permitted on site.
hardstand area
using detergents.
Chemical Typically this may Where spills occur, the A temporary containment
(Paints, occur due to containment area is to area. This is to be
thinners spillage of product. stop escape. The material impermeable and of a size
etc.) is to be treated (as to permit mixing/transfer,
required) and removed and with a storage volume
and cleaned by a licensed of twice the largest
contractor. container used.
Minor spillage outside this Treatment of spills is to
area shall be cleaned up occur on site. No discharge
with cloths and disposed of treated water to the
of to waste via the stormwater system is to
industrial bin. occur without council
approval. Incidents are to
be reported to the EPA.
Wastewater Spillage from the A licensed contractor shall No leakage is to be
relocation of the remove any residue permitted to enter the
existing sewerage sewage from unused pipes groundwater or discharge
reticulation. and contaminated soils are to the stormwater system.
to be disposed of via the
industrial bin.
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
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6.3 Operational Phase
Water quality objectives (WQO’s) for South East Queensland as set out in State Planning Policy
2017 (SPP 2017) should be achieved by identifying and adopting best practise techniques in
accordance with the abovementioned guidelines. Refer to Table 6.3 for the target WQO’s.
Table 6.3 – Minimum Mean Annual Load Reductions
Minimum Mean Annual
Contaminant
Load Reductions
Total Suspended Solids (TSS) ≥ 80%
Total Phosphorus (TP) ≥ 60%
Total Nitrogen (TN) ≥ 45%
Gross Pollutants (GP) ≥ 90%
Additionally, in order to satisfy Council’s condition no. 22(c) under application no. MCU16/0153
REC16/0041, the annual loads for the abovementioned contaminants from the post developed site
must be less than the annual loads from the pre developed site.
6.3.1 Sources of Contaminants
Potential sources of contaminants and stormwater quality improvement devices identified for the
operational phase of the development are outlined in Table 6.4.
Table 6.4 - Sources of Contaminants
Pollutant
Target Pollutant Type Acceptable Treatment Examples
Size
Primary Screening of gross Litter baskets, swales, buffer strips,
>5000um
Pollutants pollutants GPT’s, Bio-retention basins
Sedimentation of
Secondary 125um -
coarse to medium Swales, sedimentation basins, ponds
Pollutants 5000um
sediment
Bio-retention basins, constructed
Enhanced
10um – wetland macrophyte zones, other bio
sedimentation of fine
125um technologies, proprietary tertiary
particulates
stormwater treatment dvices
Tertiary Adhesion and filtration Constructed wetland macrophyte zones,
0.45um –
Pollutants of very fine / colloidal other bio technologies, proprietary
10um
sediment tertiary stormwater treatment dvices
Biological uptake of Constructed wetland macrophyte zones,
<0.45um
dissolved particles other bio technologies
6.3.2 Proposed Treatment Train
The proposed treatment train has been modelled using the following methodology:
1. Roofwater runoff from each proposed residential dwelling will be collected a 3kL water
reuse tank with overflow to the internal drainage network and directed to the proposed
bio-retention basin for treatment.
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
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2. First flush roofwater runoff from the proposed hotel building will be collected by the
internal drainage network and directed to the proposed bio-retention basin for treatment.
Roofwater runoff exceeding first flush will bypass treatment.
3. Surface runoff from the proposed residential properties and road surface will be collected
by the internal drainage network and directed to the proposed bio-retention basin for
treatment.
4. Surface runoff from the proposed hotel development will bypass treatment.
All runoff described above will then discharge to the lawful point of discharge. Siteworks and
Drainage Plans of the proposed internal drainage network detailing the treatment train assets are
included in Appendix D. Refer to Table 6.5 for details of the proposed treatment train assets.
Table 6.5 - Proposed Treatment Assets
Treatment Treatment
Description
Level Asset
Primary/ 1. 130m2 Total Filter Media Area
Secondary/ Bio-retention Basin 2. 0.4m Filter Media Depth
Tertiary 3. 0.2m Extended Detention Depth
Primary/ 1. 20 x 3kL tanks installed within the residential
Rainwater Reuse
Secondary/ detached dwelling allotments.
Tanks
Tertiary 2. 200kL tank installed within hotel allotment.
Refer to Appendix E for the Bio-retention Operational Management and Maintenance Guidelines
and for Appendix F the Bio-retention Basin Design Checklist and Calculations.
6.3.3 Pollutant Export Modelling
Following the definition of water quality objectives for the site and an assessment of the treatment
options suitable for the development, the most appropriate treatment scheme for the site was
identified. The impact of the stormwater management strategy on the quality of stormwater runoff
discharged from the site has been assessed using the pollutant export model, Model for Urban
Stormwater Improvement Conceptualisation (MUSIC).
6.3.4 MUSIC Modelling Parameters
The MUSIC model was set up in accordance with the Water-By-Design MUSIC Modelling Guidelines
for South East Queensland to the parameters listed in Table 6.6. Refer to Figure 6.1 for source
node areas.
Table 6.6 – MUSIC Parameters
Parameter Data Used
Cooroy Composite 40496 (north),
Rainfall Data
SUNSHINE COAST REGIONAL 1973 to 1983
Modelling Timestep 6 minutes
Routing No routing drain links were adopted
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
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Table 6.6 – Catchment Runoff Generation Parameters
Parameter Residential Catchment
Rainfall Threshold 1
Soil Storage Capacity (mm) 500
Initial Storage Capacity (% capacity) 10
Field Capacity (mm) 200
Infiltration Capacity Coefficient a 211
Infiltration Capacity Coefficient b 5
Initial Depth (mm) 50
Daily Recharge Rate (%) 28
Daily Baseflow Rate (%) 27
Daily Deep Seepage Rate (%) 0
6.3.5 MUSIC Modelling Results
Refer to Figure 6.1 for a print screen schematic of the pre development MUSIC model and the
annual pollutant loads that will be discharged from the proposed development site. Refer to Figure
6.2 for a print screen schematic of the post development MUSIC model and the annual pollutant
loads that will be discharged from the proposed development site.
Figure 6.1 - MUSIC Model Print Screen Schematic and Results for Pre Development.
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
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Figure 6.2 - MUSIC Model Print Screen Schematic and Results for Post Development.
The modelling results show that the pollutant reduction objectives are met for all contaminants
given in Section 6, including a reduction less than pre development loads. Therefore, it is confirmed
that post development annual loads will be less than pre development annual loads.
Should operational requirements change, this plan is required to be amended to suit. Substantial
changes may require resubmission to the local authority. Following completion of construction,
this plan is to be incorporated into the total-site management practices.
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
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7 CONCLUSION
The proposed Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way,
Peregian Beach has been assessed for its impact on the quantity and quality of stormwater
drainage.
If the proposed development maintains pre development drainage patterns, the lawful point of
discharge is the nature reserve located west of the subject site.
On-site detention (OSD) is warranted for the proposed development, as outlined in the
Stormwater Management Plan report prepared by SLR Consulting dated March 2018 (Ref No.
620.12292-R01). Therefore, the development has incorporated the recommendations of this
report into the design to ensure pre development flow conditions are maintained post
construction.
Sediment generated during the construction phase shall be dealt with in accordance with an
Erosion and Sediment Control Plan to be kept on site during the construction phase.
The proposed development triggers the State Planning Policy 2017 (SPP 2017). Rainwater reuse
tanks and a bio-retention basin will be incorporated into the proposed development to meet the
prescribed water quality objectives prior to discharging to the lawful point of discharge.
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
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APPENDIX A
DETAILED SITE SURVEY PLAN
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
Page 17
Skyline Surveyors Suite 11C Brightwater Corporate Centre PHONE 69 Attenuata Drive 07 5493 4877 MOUNTAIN CREEK QLD 4557 E: [email protected] W: www.skysurv.com.au
Page 18
Skyline Surveyors Suite 11C Brightwater Corporate Centre PHONE 69 Attenuata Drive 07 5493 4877 MOUNTAIN CREEK QLD 4557 E: [email protected] W: www.skysurv.com.au
Page 19
Skyline Surveyors Suite 11C Brightwater Corporate Centre PHONE 69 Attenuata Drive 07 5493 4877 MOUNTAIN CREEK QLD 4557 E: [email protected] W: www.skysurv.com.au
Page 20
Skyline Surveyors Suite 11C Brightwater Corporate Centre PHONE 69 Attenuata Drive 07 5493 4877 MOUNTAIN CREEK QLD 4557 E: [email protected] W: www.skysurv.com.au
Page 21
Skyline Surveyors Suite 11C Brightwater Corporate Centre PHONE 69 Attenuata Drive 07 5493 4877 MOUNTAIN CREEK QLD 4557 E: [email protected] W: www.skysurv.com.au
Page 22
Skyline Surveyors Suite 11C Brightwater Corporate Centre PHONE 69 Attenuata Drive 07 5493 4877 MOUNTAIN CREEK QLD 4557 E: [email protected] W: www.skysurv.com.au
Page 23
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APPENDIX B
PROPOSED SUBDIVISION AND DEVELOPMENT PLANS
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
Page 24
Skyline Surveyors
Suite 11C
Brightwater Corporate Centre PHONE
07 5493 4877
69 Attenuata Drive
MOUNTAIN CREEK QLD 4557
E: [email protected]
W: www.skysurv.com.au
Page 25
RETAINING WALLS REFER TO
BOUNDARY FENCE
CIVIL ENG. DETAILS. GENERAL NOTES
REFER TO WD-A-510 FOR NOTES: DIMENSIONS TO BE VERIFIED ON SITE PRIOR TO COMMENCEMENT, PREPARATION
OF SHOP DRAWINGS OR MANUFACTURING. FIGURED DIMENSIONS TAKE
PRECEDENCE OVER SCALING.
POOL AREA DETAILS
REFER TO CIVIL ENGINEERS DRAWINGS FOR RETAINING VERIFY LOCATION OF EXISTING SERVICES BEFORE COMMENCEMENT.
KAMALA 4000 WALLS, ROAD SURFACE LEVELS AND PAD LEVELS ALL CONSTRUCTION TO BE IN ACCORDANCE WITH THE BUILDING CODE OF
10 RL 4.990 RL 6.000 RL 6.250 RL 6.800
AUSTRALIA, BUILDING ACT 1975 AS AMENDED, STANDARD BUILDING BY-LAWS
AND RELEVANT AUSTRALIAN STANDARDS.
RL 4.850 REFER TO LANDSCAPE ARCHITECTS DRAWINGS FOR
Pool BBQ RL 5.620 6700 RL 6.500 FENCE TYPES, PLANTING AND PAVEMENT TREATMENTS ISSUE DATE REVISION
LILY 1 25.03.19 REVIEW ISSUE
DISTRIBUTION BOARD TO
ELECTRICAL ENG. DETAILS 9 1889 750 750 4000 REFER TO HYDRAULIC ENGINEERS DRAWINGS FOR FIRE 2 27.05.19 REVIEW ISSUE
MP HYDRANT LOCATIONS 3 31.05.19 REVIEW ISSUE
RL 4.750 700 900
4 25.06.19 COORDINATION ISSUE
BIO-RETENSION BASIN TO WALLUM MARRAM WALLUM 2280 2000 2352 WALLUM MARRAM WALLUM 5 27.06.19 COORDINATION ISSUE
CIVIL ENG. DETAILS
RL 4.200 11 12 13 14 15 16 6 28.06.19 TENDER ISSUE
BATTER TO CIVIL ENG.
DETAILS
FH
RETAINING WALLS TO
CIVIL ENG. DETAILS 2m WIDE CONC. PATH
INTERNAL 1.2m WIDE CONCRETE
PRIVATE FOOTPATH FH TIERED LANDSCAPING REFER TO
CHAMBER & MAN HOLE. ROAD LANDSCAPE ARCH. DRAWINGS.
REFER TO CIVIL ENG. 4000
2500mm HIGH
DRAWINGS. FH ACOUSTIC FENCE
PRIVATE ROADWAY INTERNAL REFER TO FENCE
LIGHTING POLE, TO PRIVATE PLAN
ROAD
ELECTRICAL ENG. DETAILS. RETAINING WALLS TO
1000 CIVIL ENG. DETAILS
900 3000
SALTBUSH 1 RL 6.650
LILY 17
DETENTION TANK TO
8
RL 4.900 MARRAM
CIVIL ENG. DETAILS
V1
KAMALA 6 RL 5.150
KAMALA
7
V2
RL 4.920 5
RL 5.780
SALTBUSH 2 RL 7.020
COUNCIL
18
V3
RESERVE Bar
V4 KAMALA KAMALA
FH 1 4 RL 5.730
RL 4.900 MARRAM MARRAM
RL 5.100 2 3 RL 5.200
REFER TO WD-A-500 FOR RL 4.900
POOL AREA DETAILS
1000 SALTBUSH 1 RL 6.850
Pool
3000
500 19
INTERNAL
PRIVATE
ROAD SALTBUSH 2 RL 6.750
DRAINAGE PITS TO CIVIL
ENG. DETAILS 20
VIS. Cars VIS. Cars
V5 V6 V7 V8 FH
FH
MP
BIN WASHDOWN &
Lanai GARDEN EQUIPMENT
COUNCIL
RESERVE STORE
PROVIDE ACCESS GATE TO
EASEMENT EXISTING SHOPPING CENTRE DISTRIBUTION BOARD TO
Conference TO MATCH EXISTING ELECTRICAL ENG. DETAILS
room
ROADWAY LIGHTING
RL 4.400 EXISTING SEWER LINE
BOLLARDS REFER TO Kit.
LANDSCAPE DRAWINGS FOR EASEMENT - RED DASH
DETAILS EXISTING SEWER LINE 2m WIDE CONCRETE FOOTPATH
Reception TO BE REDIRECTED REFER TO CIVIL ENG. DETAILS
2500 2500 2800 2500 2500 EXISTING MAN HOLE
CONCRETE PAVEMENT 4m WIDE
DRIVEWAY TO CIVIL ENG. EMERGENCY
DETAILS EGRESS ROAD
EXISTING
Car parking for SPECIALTY SHOPS
Units over
EXISTING
IGA
2800 2500 2500 2500
Security
gate Lobby
Bin
Ser.
CARPARK
Store
SRV
1.5m HIGH MASONRY SCREEN TO BIN
2500 2500 2500 2500
STORE RENDERED AND PAINT FINISH 1C/24 MACQUARIE ST, TENERIFFE, QLD, 4005 P: 07 3339 7962
WWW.RDARCH.COM.AU ACN: 151 857 019 ABN: 14 151 857 019
CLIENT
RETAINING WALLS TO
MAIN SWITCH BOARD TO
MP CIVIL ENG. DETAILS
ELECTRICAL ENG. DETAILS
Car parking for
SCANLON GROUP
Units over BELOW GROUND
200 KL TANK TO
ENERGEX PMT SITE 4.8m x 5.7m
COLLECT AND REUSE PROJECT
LANDLOCKED SUBSTATION. REFER
ROOFWATER. REFER PEREGIAN VILLAGE MARKETS
TO ELECTRICAL ENG. DETAILS
TO CIVIL ENG. DETAILS. ESSENCE OF
2500 2500 2500 2500
COUNCIL PEREGIAN BEACH
LOCATION
RESERVE
215 DAVID LOW WAY,
PEREGIAN BEACH
BUSH FIRE SETBACK ZONE
DRAWING
FH
RETAINING WALLS TO
CIVIL ENG. DETAILS SITE PLAN - GROUND FLOOR
Bins
DETAIL
SCALE DATE DRAWN BY
Access and service easement
As APRIL '19 LM
indicated
JOB No. DRAWING No. REVISION
ENERGEX HV/LV CABLE AND
CONDUIT PIT. REFER TO ELECTRICAL 180082 WD-A-100 6
ENG. FOR DETAILS.
1 1.0_SITE PLAN OF LAYOUT COPYRIGHT RED DOOR ARCHITECTURE ALL RIGHTS RESERVED. THIS
- 1 : 250@A1 DRAWING MAY NOT BE REPRODUCED OR TRANSMITTED IN ANY FORM OR BY
ANY MEANS IN PART OR IN WHOLE WITHOUT WRITTEN PERMISSION OF RED
DOOR ARCHITECTURE.
Page 26
GENERAL NOTES
DIMENSIONS TO BE VERIFIED ON SITE PRIOR TO COMMENCEMENT, PREPARATION
OF SHOP DRAWINGS OR MANUFACTURING. FIGURED DIMENSIONS TAKE
PRECEDENCE OVER SCALING.
VERIFY LOCATION OF EXISTING SERVICES BEFORE COMMENCEMENT.
KAMALA 4000 2737 3° 2636 2634 3° 2739 ALL CONSTRUCTION TO BE IN ACCORDANCE WITH THE BUILDING CODE OF
1849 MARRAM MARRAM AUSTRALIA, BUILDING ACT 1975 AS AMENDED, STANDARD BUILDING BY-LAWS
10 WALLUM 3°
12 WALLUM WALLUM 3° WALLUM AND RELEVANT AUSTRALIAN STANDARDS.
3° RL 7.850 3° 11 13 6700 14 15 16 ISSUE DATE REVISION
REFER TO WD-A-510 FOR RL 7.990 RL 8.620 RL 9.500
POOL AREA DETAILS RL 9.000 RL 9.250 RL 9.800 4000 1 25.03.19 REVIEW ISSUE
LILY 3° 3° 3° 3° 2 27.05.19 REVIEW ISSUE
9 767
3
4
27.06.19
28.06.19
TENDER REVIEW ISSUE
TENDER ISSUE
RL 7.750
3° 3°
POOL B 3° 750 3° 900
900
550
3°
750 3° 3° 865 SALTBUSH 1
3° 3°
17 RL 9.650
LILY
8
RL 7.900
3°
MARRAM
3° 3°
KAMALA
3° 6
KAMALA
2049 7 RL 8.150
2697
RL 7.920 5
RL 8.780 SALTBUSH 2
3000
18 RL 10.020
3°
KAMALA
2192 4531 2692
KAMALA 3° 3°
4
1 3°
MARRAM MARRAM 3° RL 8.730
3°
3°
RL 7.900
2 3
RL 8.100 RL 8.200
REFER TO WD-A-500 FOR SALTBUSH 1
POOL AREA DETAILS
POOL A
3° 3° 19 RL 9.850
3° 3° 3° 3°
290 865
SALTBUSH 2
20 RL 9.750
EASEMENT
UNIT 2 UNIT 1
RL 7.700
UNIT 3
UNIT 4
GYM
RL 7.700
UNIT 5
UNIT 16
UNIT 6 UNIT 15
1C/24 MACQUARIE ST, TENERIFFE, QLD, 4005 P: 07 3339 7962
WWW.RDARCH.COM.AU ACN: 151 857 019 ABN: 14 151 857 019
UNIT 7
UNIT 14 CLIENT
SCANLON GROUP
PROJECT
EXISTING
PEREGIAN VILLAGE MARKETS
ESSENCE OF
UNIT 8 UNIT 9 UNIT 10UNIT 11UNIT 12UNIT 13
PEREGIAN BEACH
LOCATION
215 DAVID LOW WAY,
PEREGIAN BEACH
BUSH FIRE SETBACK ZONE
DRAWING
SITE PLAN - FIRST FLOOR
DETAIL
SCALE DATE DRAWN BY
1 : 250 APRIL '19 LM
JOB No. DRAWING No. REVISION
1 2.0_SITE PLAN OF FIRST FLOOR 180082 WD-A-101 4
SK-001 1 : 250@A1
COPYRIGHT RED DOOR ARCHITECTURE ALL RIGHTS RESERVED. THIS
DRAWING MAY NOT BE REPRODUCED OR TRANSMITTED IN ANY FORM OR BY
ANY MEANS IN PART OR IN WHOLE WITHOUT WRITTEN PERMISSION OF RED
DOOR ARCHITECTURE.
Page 27
GENERAL NOTES
DIMENSIONS TO BE VERIFIED ON SITE PRIOR TO COMMENCEMENT, PREPARATION
OF SHOP DRAWINGS OR MANUFACTURING. FIGURED DIMENSIONS TAKE
PRECEDENCE OVER SCALING.
VERIFY LOCATION OF EXISTING SERVICES BEFORE COMMENCEMENT.
ALL CONSTRUCTION TO BE IN ACCORDANCE WITH THE BUILDING CODE OF
AUSTRALIA, BUILDING ACT 1975 AS AMENDED, STANDARD BUILDING BY-LAWS
7° AND RELEVANT AUSTRALIAN STANDARDS.
ISSUE DATE REVISION
1 27.05.19 REVIEW ISSUE
LILY 5°
5°
5° 5°
5°
5° 2 27.06.19 TENDER REVIEW ISSUE
9 3 28.06.19 TENDER ISSUE
KAMALA
WALLUM MARRAM WALLUM WALLUM MARRAM WALLUM
10
11 12 13 14 15 16
KAMALA SALTBUSH 1
KAMALA
LILY
7 5° 17
8 5
7° MARRAM
6 7°
3°
SALTBUSH 2
18
7°
7°
5° 5°
KAMALA
KAMALA
1 MARRAM MARRAM 4 SALTBUSH 1
2 3 19
3°
SALTBUSH 2
20
EASEMENT
UNIT 18 UNIT 17
RL 10.400
UNIT 19
UNIT 20
CONFERENCE ROOM
RL 10.400
UNIT 21
UNIT 32
UNIT 22
UNIT 31
1C/24 MACQUARIE ST, TENERIFFE, QLD, 4005 P: 07 3339 7962
WWW.RDARCH.COM.AU ACN: 151 857 019 ABN: 14 151 857 019
UNIT 23
UNIT 30 CLIENT
SCANLON GROUP
PROJECT
EXISTING
PEREGIAN VILLAGE MARKETS
ESSENCE OF
UNIT 24UNIT 25 UNIT 26UNIT 27 UNIT 28UNIT 29
PEREGIAN BEACH
LOCATION
215 DAVID LOW WAY,
PEREGIAN BEACH
BUSH FIRE SETBACK ZONE
DRAWING
SITE PLAN - SECOND FLOOR
DETAIL
SCALE DATE DRAWN BY
1 : 250 APRIL '19 LM
JOB No. DRAWING No. REVISION
180082 WD-A-102 3
1 3.0_SITE PLAN OF SECOND FLOOR COPYRIGHT RED DOOR ARCHITECTURE ALL RIGHTS RESERVED. THIS
SK-001 1 : 250@A1
DRAWING MAY NOT BE REPRODUCED OR TRANSMITTED IN ANY FORM OR BY
ANY MEANS IN PART OR IN WHOLE WITHOUT WRITTEN PERMISSION OF RED
DOOR ARCHITECTURE.
Page 28
GENERAL NOTES
DIMENSIONS TO BE VERIFIED ON SITE PRIOR TO COMMENCEMENT, PREPARATION
OF SHOP DRAWINGS OR MANUFACTURING. FIGURED DIMENSIONS TAKE
PRECEDENCE OVER SCALING.
VERIFY LOCATION OF EXISTING SERVICES BEFORE COMMENCEMENT.
KAMALA ALL CONSTRUCTION TO BE IN ACCORDANCE WITH THE BUILDING CODE OF
AUSTRALIA, BUILDING ACT 1975 AS AMENDED, STANDARD BUILDING BY-LAWS
10
AND RELEVANT AUSTRALIAN STANDARDS.
ISSUE DATE REVISION
1 27.05.19 REVIEW ISSUE
LILY 2 27.06.19 TENDER REVIEW ISSUE
9 3 28.06.19 TENDER ISSUE
WALLUM MARRAM WALLUM WALLUM MARRAM WALLUM
11 12 13 14 15 16
SALTBUSH 1
LILY 17
8
KAMALA MARRAM
KAMALA
7 6
5
SALTBUSH 2
18
KAMALA
KAMALA
4
1 MARRAM MARRAM
2 3
SALTBUSH 1
19
SALTBUSH 2
20
EASEMENT
OUTLINE OF BUILDING
BELOW SHOWN DAHED.
2° 2°
LIFT OVERRUN
1C/24 MACQUARIE ST, TENERIFFE, QLD, 4005 P: 07 3339 7962
WWW.RDARCH.COM.AU ACN: 151 857 019 ABN: 14 151 857 019
CLIENT
SCANLON GROUP
PROJECT
ESSENCE OF
PEREGIAN BEACH
LOCATION
215 DAVID LOW WAY,
PEREGIAN BEACH
BUSH FIRE SETBACK ZONE
DRAWING
SITE PLAN - ROOF DETAIL
SCALE DATE DRAWN BY
1 : 250 APRIL '19 LM
JOB No. DRAWING No. REVISION
180082 WD-A-103 3
1 4.0_SITE PLAN OF UNIT BUILDING ROOF COPYRIGHT RED DOOR ARCHITECTURE ALL RIGHTS RESERVED. THIS
SK-001 1 : 250@A1
DRAWING MAY NOT BE REPRODUCED OR TRANSMITTED IN ANY FORM OR BY
ANY MEANS IN PART OR IN WHOLE WITHOUT WRITTEN PERMISSION OF RED
DOOR ARCHITECTURE.
Page 29
18164 - SBSMP/0
Page 18
APPENDIX C
DBYD PLANS
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
Page 30
Sequence No: 79986712
Job No: 15716075 Overview
Location: 215 David Low Way, Peregian Beach, QLD 4573
1
2
Legend | Scale: 1:2050 DISCLAIMER: While reasonable measures have been taken to ensure the accuracy of the information
contained in this plan response, neither Noosa Shire Council or PelicanCorp shall have any liability whatsoever
in relation to any loss, damage, cost or expense arising from the use of this plan response or the information
contained in it or the completeness or accuracy of such information. Use of such information is subject to and
constitutes acceptance of these terms.
Plans generated 07/02/2019 by Pelicancorp TicketAccess Software | www.pelicancorp.com AU.Noosa SC - Overview Plan.docx (29 Jun 2018)
Page 31
Sequence No: 79986712
Job No: 15716075 Tile No: 1
Location: 215 David Low Way, Peregian Beach, QLD 4573
Legend | Scale: 1:1000 DISCLAIMER: While reasonable measures have been taken to ensure the accuracy of the information
contained in this plan response, neither Noosa Shire Council or PelicanCorp shall have any liability whatsoever
in relation to any loss, damage, cost or expense arising from the use of this plan response or the information
contained in it or the completeness or accuracy of such information. Use of such information is subject to and
constitutes acceptance of these terms.
Plans generated 07/02/2019 by Pelicancorp TicketAccess Software | www.pelicancorp.com AU.Noosa SC - Response Plan.docx (29 Jun 2018)
Page 32
Sequence No: 79986712
Job No: 15716075 Tile No: 2
Location: 215 David Low Way, Peregian Beach, QLD 4573
Legend | Scale: 1:1000 DISCLAIMER: While reasonable measures have been taken to ensure the accuracy of the information
contained in this plan response, neither Noosa Shire Council or PelicanCorp shall have any liability whatsoever
in relation to any loss, damage, cost or expense arising from the use of this plan response or the information
contained in it or the completeness or accuracy of such information. Use of such information is subject to and
constitutes acceptance of these terms.
Plans generated 07/02/2019 by Pelicancorp TicketAccess Software | www.pelicancorp.com AU.Noosa SC - Response Plan.docx (29 Jun 2018)
Page 33
18164 - SBSMP/0
Page 19
APPENDIX D
SITEWORKS AND DRAINAGE PLANS
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
Page 34
P: (07) 3369 8411
F: (07) 3369 1893
E : [email protected]
© Morgan Consulting Engineers
This drawing is not to be copie d,
retained or used without the
permission of the copyright holder.
1 GREAT GEORGE STREET
PADDINGTON Q LD 4 0 6 4
Page 35
P: (07) 3369 8411
F: (07) 3369 1893
E : [email protected]
© Morgan Consulting Engineers
This drawing is not to be copie d,
retained or used without the
permission of the copyright holder.
1 GREAT GEORGE STREET
PADDINGTON Q LD 4 0 6 4
Page 36
P: (07) 3369 8411
F: (07) 3369 1893
E : [email protected]
© Morgan Consulting Engineers
This drawing is not to be copie d,
retained or used without the
permission of the copyright holder.
1 GREAT GEORGE STREET
PADDINGTON Q LD 4 0 6 4
Page 37
P: (07) 3369 8411
F: (07) 3369 1893
E : [email protected]
© Morgan Consulting Engineers
This drawing is not to be copie d,
retained or used without the
permission of the copyright holder.
1 GREAT GEORGE STREET
PADDINGTON Q LD 4 0 6 4
Page 38
P: (07) 3369 8411
F: (07) 3369 1893
E : [email protected]
© Morgan Consulting Engineers
This drawing is not to be copie d,
retained or used without the
permission of the copyright holder.
1 GREAT GEORGE STREET
PADDINGTON Q LD 4 0 6 4
Page 39
≤
P: (07) 3369 8411
F: (07) 3369 1893
E : [email protected]
© Morgan Consulting Engineers
This drawing is not to be copie d,
retained or used without the
permission of the copyright holder.
1 GREAT GEORGE STREET
PADDINGTON Q LD 4 0 6 4
Page 40
P: (07) 3369 8411
F: (07) 3369 1893
E : [email protected]
© Morgan Consulting Engineers
This drawing is not to be copie d,
retained or used without the
permission of the copyright holder.
1 GREAT GEORGE STREET
PADDINGTON Q LD 4 0 6 4
Page 41
18164 - SBSMP/0
Page 20
APPENDIX E
BIO-RETENTION OPERATIONAL MANAGEMENT AND MAINTENANCE
GUIDELINES
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
Page 42
BIO-RETENTION
OPERATIONAL MANAGEMENT AND
MAINTENANCE GUIDELINE
PROPOSED MIXED USE DEVELOPMENT
215 DAVID LOW WAY
PEREGIAN BEACH
18164 - O&MG
D:\JOBS\18-Jobs\18164 - 215 David Low Way, Peregian Beach\Civil\Reports\SBSMP\Working\Appendices\18164 - MCE Bio Retention
Operational Management & Maintenance Guideline - Rev 0.doc
Page 43
Page 2
Table of Contents
1 INTRODUCTION .......................................................................................... 3
2 GENERAL .................................................................................................. 3
3 RESPONSIBILITY FOR INSPECTION ..................................................................... 3
4 DATA COLLECTION / STORAGE REQUIREMENTS ..................................................... 3
5 MAINTENANCE PROCEDURE............................................................................. 3
5.1 General .............................................................................................. 3
5.2 Inspections .......................................................................................... 4
5.3 Watering ............................................................................................ 5
5.4 Vegetation Management and Weed Control .................................................... 6
5.5 Validation Water Quality Testing ................................................................ 6
5.6 Equipment Needs .................................................................................. 6
5.7 Occupational Health and Safety ................................................................. 6
5.8 Public Safety ........................................................................................ 7
5.9 Disposal Requirements ............................................................................ 7
5.10 Access Issues ........................................................................................ 7
5.11 Bio-Retention Basin Resetting .................................................................... 7
Appendix A BIO-RETENTION BASIN MAINTENANCE CHECKLIST ..................................... 8
Bio-Retention Basin Operational Management and Maintenance Guideline
Page 44
Page 3 1 INTRODUCTION The water quality treatment for the proposed development includes a proposed bio-retention basin. This document provides an overview of the maintenance requirements for the bio- retention water quality device(s) on site to ensure that they are properly maintained. 2 GENERAL Bio-retention basins are vegetated areas where runoff is filtered through a filter media layer (e.g. sandy loam) as it percolates downwards. It is then collected via perforated underground drains and flows to downstream waterways or to storages for reuse. Bio-retention basins operate by filtering stormwater runoff through densely planted surface vegetation and then percolating runoff through a prescribed filter media. During percolation, pollutants are retained through fine filtration, adsorption and some biological uptake. The vegetation in a bio- retention system is a vital functional element of the system providing a substrate for biofilm growth within the upper layer of the filter media. The proposed bio-retention basin within the site will do much of the same. It has been designed to reduce the impact of the development on the downstream waterway environment. 3 RESPONSIBILITY FOR INSPECTION The principal involved consultancy will be required to appoint an appropriately qualified consultant maintenance contractor to carry out the inspections of the bio-retention basin during the construction and on-maintenance period. At the completion of the maintenance period the responsibility to undertake the inspections and generally maintain the basin will be shifted to Body Corporate. 4 DATA COLLECTION / STORAGE REQUIREMENTS Inspection records will be required for comparison of the performance of the system. In order to assist this process it is proposed that the Bio-retention Basin Maintenance Checklist prepared by Healthy Waterways (2006) be adopted for the site. Refer Appendix A for a copy of the checklist. Copies of the completed checklist are to be forwarded to the Morgan Consulting Engineers (or other consultant nominated by the Principal) and to be provided to Council at the expiry of the maintenance period and on request thereafter. 5 MAINTENANCE PROCEDURE 5.1 General Vegetation plays a key role in maintaining the porosity of the filter media of a bio-retention basin and a strong healthy growth of vegetation is critical to its performance. Therefore the most intensive period of maintenance is during the plant establishment period (i.e. first two years) when weed removal and replanting may be required. Bio-Retention Basin Operational Management and Maintenance Guideline
Page 45
Page 4
It is also the time when high sediment loads may impact on plant growth and infiltration rates.
For this reason, the bio-retention systems are to be initially turfed. Vegetation can be
introduced when construction has been completed on an appropriate percentage of the lots
draining to each bio-retention system.
Inflow systems and overflow systems require careful monitoring, as these can be prone to scour
and litter build up. Debris can block inlets or outlets and can be unsightly, particularly in high
visibility areas. Inspection and removal of debris should be done regularly, and debris should be
removed whenever it is observed on a site.
5.2 Inspections
5.2.1 General
The bio-retention basins treat stormwater runoff through the principles of sedimentation,
filtration and percolation. These devices do not incorporate the use of screens and require
minimal maintenance during their operation. However, the systems are subject to deposition of
sediment that is filtered through the media.
Routine inspections shall be undertaken on the bio-retention basins after every significant
rainfall event (30mm of rainfall in a 24 hour period) or on a three (3) monthly basis within the
first twelve (12) months and on a six (6) monthly basis thereafter. The requirements of the
inspection for the bio-retention basin shall include the following:
1. Check for build up of sediment at pipe inlet structures;
2. Check for sediment within sub-soil drainage lines;
3. Check all concrete structures for damage and deterioration;
4. Check for the build up of vegetation matter on the bed surface and removal of
vegetation matter to ensure minimal blockage to media;
5. Check achieved flow rate through the media is maintained in accordance with the design
requirements and anticipated compaction;
6. Check inflow systems, outlets and the under drainage pipe elements to identify and
remove any blockages such as litter build up.
5.2.2 Filter Media
The filter media will be inspected for sediment deposition of the bed of the bio-retention
basins and removed as required.
Bio-Retention Basin Operational Management and Maintenance Guideline
Page 46
Page 5
Inspect for the accumulation of an impermeable layer (such as oily or clayey sediment) that
may have formed on the surface of the filter media. A symptom may be that water remains
ponded in the bio-retention basin for more than a few hours after a rain event. Repair minor
accumulations by raking away any mulch on the surface and scarifying the surface of the filter
media between plants. Any leaf litter should be removed to help maintain the surface porosity
of the filter media.
Ensure the perforated pipes are not blocked to prevent filter media and plants from becoming
waterlogged. A small steady clear flow of water may be observed discharging from the
perforated pipe at its connection into the downstream pit some hours after rainfall.
Note that smaller rainfall events after dry weather may be completely absorbed by the filter
media and not result in flow. Sub-soil drainage lines are to be flushed with clean water as
required to remove and blockage.
Sediment should be removed where it has smothered vegetation or caused blockages to the
inlets our outlet systems.
Any holes and or scouring apparent on the filter media will be repaired. Ensure no damage has
occurred to the inlet and outlet systems, if this has occurred repair as required.
5.2.3 Repair of Damage
Any accumulation of an impermeable layer, (such as oily or clayey sediment) that may have
formed on the surface of the filter media will be repaired. A symptom may be that water
remains ponded in the bio-retention basin for more than a few hours after a rain event. Repair
these minor accumulations by raking away any mulch on the surface and scarifying the surface
of the filter media between plants. Any leaf litter should be removed to help maintain the
surface porosity of the filter media.
5.3 Watering
Regular watering of the bio-retention basin vegetation is essential for successful establishment
and healthy growth. The frequency of watering to achieve successful establishment will depend
upon rainfall, maturity of planting stock and the water holding capacity of the soil.
The following watering program should be adequate following the installation of vegetation:
1. Week 1-2, 3 visits/week
2. Week 3-6, 2 visits/week
3. Week 7-12, 1 visit/week
After the first three month period, watering may still be required, particularly during the first
winter (dry period). Irrigation shall be undertaken in consultation with the Landscape Architect.
Bio-Retention Basin Operational Management and Maintenance Guideline
Page 47
Page 6 5.4 Vegetation Management and Weed Control Conventional surface mulching of the bio-retention basins with organic material like tanbark, should not be undertaken. Most organic mulch floats and runoff typically causes this material to be washed away with a risk of blocking drains. If weeds are observed within the bio-retention basin they shall be removed. Weeding will generally involve manual removal of the species. Vegetation planting densities are to be in accordance with the Landscape Architect’s design. Where necessary a biodegradable erosion mat can be applied the basin batters to help combat weed invasion and reduce the labour intensive maintenance requirements for weed removal. Herbicides are not recommended as a means of weed control. If required, however, their application is to be managed to avoid unintentional destruction of other vegetation or the introduction of chemicals that may contaminate the stormwater runoff. Where necessary, in areas that have been extensively weeded, the bio-retention basin shall be replanted with similar planting densities using suitable native species in accordance with the Landscape Architects design. Inspection of the existing vegetation is to take place and any dead or diseased vegetation shall be removed and replaced with suitable native species in accordance with the Landscape Architects design. The removal of plants, dead or diseased vegetation or weeds shall be disposed offsite at an appropriate waste management facility. All litter and debris present on the surface or batters of the bio-retention basins shall be removed and disposed offsite at an appropriate waste management facility. 5.5 Validation Water Quality Testing Validation water quality testing is not proposed for the site. 5.6 Equipment Needs The equipment required to undertake regular maintenance to the bio-retention basins will be standard hand held landscaping tools. No specific mechanical equipment is expected to be required for the maintenance of the basins unless resetting is required (refer Section 5.11). 5.7 Occupational Health and Safety The maintenance activities are to be undertaken in accordance with all current occupational and workplace health and safety legislation, regulations, codes of practice or manufacturers guidelines. Bio-Retention Basin Operational Management and Maintenance Guideline
Page 48
Page 7 For maintenance access the shallow nature of the bio-retention systems enables pedestrian ingress. As noted above no mechanical equipment is required unless resetting is required. The batter grades are considered to be acceptable and do not pose an occupational health and safety issue given proper training to maintenance personnel. The application of pesticides or herbicides in response to any weed outbreak, which cannot be controlled via manual removal, is to be undertaken by maintenance personnel in accordance with manufacturer’s guidelines in consultation with the Landscape Architect. Protective measures are to be implemented so as to minimise exposure to personnel, with personal protective measures to be the final hierarchical option. 5.8 Public Safety While maintenance is being undertaken consideration of pedestrians and cyclists is to be made due to the close proximity of the footpaths. To avoid any safety concerns it is recommended that temporary warning signs be placed at a sufficient distance to allow pedestrians and cyclists to become aware of possible maintenance vehicles/personnel when maintenance is being undertaken. 5.9 Disposal Requirements The removal of litter and debris, plants, dead or diseased vegetation or weeds are to be disposed offsite at an appropriate waste management facility. 5.10 Access Issues Suitable access to the bio-retention basins can be achieved directly from the internal road network within the site. 5.11 Bio-Retention Basin Resetting Resetting (i.e. complete reconstruction) of the bio-retention basins will be required if the system fails to drain adequately after tilling of the surface. Replacement of the filter media is required when it becomes 50% blocked, which is estimated to occur approximately every 8 to 10 years. This can be assessed via a review of sediment build up and the time necessary for the system to drain or by in-situ falling head permeability tests of the filter media. Bio-Retention Basin Operational Management and Maintenance Guideline
Page 49
Page 8
Appendix A
BIO-RETENTION BASIN MAINTENANCE CHECKLIST
Bio-Retention Basin Operational Management and Maintenance Guideline
Page 50
18164 - SBSMP/0
Page 21
APPENDIX F
BIO-RETENTION BASIN DESIGN CHECKLIST AND CALCULATIONS
Site Based Stormwater Management Plan
Reconfiguration of a Lot and Mixed Use Development at 215 David Low Way, Peregian Beach
Page 51
Water By Design Bio-Retention Basin Design Checklist
Job No.: 18164
Address: 215 David Low Way, Peregian Beach
Development: Proposed Reconfiguration of a Lot and Mixed Used Development
Date: 26/11/2019
Author: DY
Checked: CG
Item Description Detail Comment
1. Treatment
a. Catchment area (ha) 1.2046
b. Filter media area (excluding batters) (m2) 130
c. Confirm water quality performance meets the
Yes
design objectives
d. Confirm hydrologic performance meets relevant
Yes
frequent flow objectives
2. Design Inflows
a. Minor design storm entering system Q3month
b. Minor storm peak flow rate (m3/s) 0.140
c. High flow pipes from the internal drainage network
Major design storm entering system N/A
directed to detention tank.
d. Major storm peak flow rate (m3/s) N/A
3. Depth Profile
a. Refer to Drawing No.'s 18164/C10 - 18164/C24
Bioretention drainage profile type Type 2
prepared by Morgan Consulting Engineers.
b. Minimum drainage layer depth (mm) 200 Refer comment 3a.
c. Maximum drainage layer depth (mm) 248 Refer comment 3a.
d. Transition layer depth (mm) 100 Refer comment 3a.
e. Saturated zone depth for Type 1 bioretention
N/A
systems
f. Filter media layer depth (mm) 400 Refer comment 3a.
g. Extended detention depth (mm) 200 Refer comment 3a.
h.
Maximum water level depth above extended
600
detention for major storm event (mm)
i. Freeboard to top of embankment (mm) 200
j. Total system profile depth (3c+3d+3f+3g+3h+3i)
1748
(mm)
k. Liner type - (i) Permeable, (ii) Impermeable, (ii)
Impermeable Refer comment 3a.
None to base
l.
AASS/PASS assessed and appropriately managed N/A
m. Presence of dispersive soils assessed and
N/A
appropriately managed
4. Design Levels
a. Outlet invert level (m AHD) 2.420 Refer comment 3a.
b. Overflow pit invert level (m AHD) 2.452 Refer comment 3a.
c. Minimum drainage layer level (m AHD) 2.452 Refer comment 3a.
d. Filter media surface level (m AHD) 3.200 Refer comment 3a.
e. Overflow pit crest level (m AHD) 3.400 Refer comment 3a.
f. Overflow weir level (m AHD) N/A Refer comment 2c.
g. Maximum design water level (m AHD) 4.000 Refer comment 3a.
h. Top of embankment/batter level (m AHD) 4.200 Refer comment 3a.
i. Inlet/inflow invert level (m AHD) 3.300 Minimum IL of inlets. Refer comment 3a.
j. Total level difference (m) 1.748
k. Highest astronomical tide level (m AHD) N/A
l. Groundwater level (m AHD) N/A
5. Layout
a. Maximum filter media length (m) 20.45
b. Maximum filter media width (m) 6.9
c. Maximum batter slope (V:H) 1:3 Refer comment 3a.
d. Maximum wall height (m) 0.800 Height above filter media surface
e. Provision for services N/A
f. Private bioretention basin. Shallow depth. Access
Maintenance access provided N/A
provided via internal driveway.
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Item Description Detail Comment
g. Flood storage volume above extended detention
N/A
(m3)
6. Inlet Design
a. Inlet/inflow type Pipe
b. Diversion/surcharge type N/A
c. Coarse sediment removal N/A
d. Coarse sediment removal area (m2) N/A
e. Coarse sediment removal depth (m) N/A
f. Coarse sediment clean-out frequency N/A
g. Flow distribution type N/A
h. Confirm scour protection at inflow locations Yes Refer comment 3a.
i. Minor storm flow velocity over filter (m/s) 0.076 Scour protection provided
j. Major storm flow velocity over filter (m/s) N/A Refer comment 2c.
7. Underdrainage (Outlet Design)
a. Filter media saturated hydraulic conductivity
180
(mm/hr)
b. Maximum filter infiltration capacity (m3/s) 0.010125 Based on 135m2 filter media area
c. Underdrain capacity inclusive of blockage factors
>0.010125 [email protected]% grade
(m3/s)
8. Outflow Design (Outlet Design)
a. Overflow pit type Field inlet Refer comment 3a.
b. Overflow pit dimensions (mm) 900x600 Refer comment 3a.
c. Overflow weir length (m) 3.00
d. Overflow pit capacity inclusive of blockage Assuming 50% blockage and 600mm ponding over
1.16
factors (m3/s) the surface of the pit.
e. Overflow pit plus overflow weir capacity inclusive
N/A Refer comment 2c.
of blockage factors (m3/s)
f. Outlet pipe size (mm) Ø375 Refer comment 3a.
g.
Appropriate outlet scour protection provided N/A Outlet to Detention Tank.
9. Vegetation Design
a. - Refer Landscape Architect Plans prepared by AGLA
Planting style
(Job No. 19.021).
b. Trees and shrubs to be included - Refer 9.a
c. Species diversity - Refer 9.a
d. Species selection - Refer 9.a
e. Planting density - Refer 9.a
f. Mulch type and depth - Refer 9.a
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