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Appendix I - Stormwater Management Plan
Attached to the e-mail MCU14/0083 Appendices.
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Log in to see the plans as drawnGateway Drive, Noosaville Stormwater Management Plan Reference Number: 205-002-002R Mogpropmanagement Pty Ltd 3/10/2014
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Page 2
Prepared by:
Projex Partners Pty Ltd
ACN 153 518 971 ABN 62 153 518 971
Level 2, 9 Capital Place
KAWANA WATERS Qld 4575
Telephone: 07 5493 3649
Facsimile: 07 5493 3638
DOCUMENT ISSUE RECORD
Revision
Date Revised Revision Details Author Checked Approved
Code
A 03/10/2014 Original Issue TH KP
© 2014 Projex Partners Pty Ltd
This document is and shall remain the property of Projex Partners Pty Ltd. This document may only be used for the
purposes for which it was commissioned in accordance with the Terms of Engagement. Unauthorised use of this document
in any form whatsoever is prohibited.
This report has been prepared on behalf of and for the exclusive use of the Client, and is subject to all provisions of the
agreement between Projex Partners and the Client. Projex Partners accepts no liability or responsibility whatsoever for
reliance upon this report by any third party.
Page 3
CONTENTS 1 INTRODUCTION 1 2 SITE CONDITIONS 2 2.1 EXISTING CONDITIONS 2 2.1.1 LOCATION 2 2.1.2 SITE TOPOGRAPHY 2 2.1.3 EXISTING LAND USE 3 2.2 DEVELOPED CONDITIONS 3 2.2.1 DESCRIPTION OF PROPOSED DEVELOPMENT 3 2.2.2 PROPOSED STORMWATER DRAINAGE INFRASTRUCTURE 3 3 WATER QUALITY MANAGEMENT 4 3.1 GENERAL 4 3.2 TEMPORARY WATER QUALITY CONTROL 4 3.3 PERMANENT WATER QUALITY CONTROL 4 3.4 WATER QUALITY OBJECTIVES 4 3.5 IMPLEMENTATION 5 3.5.1 STORMWATER DETENTION WITH FILTRATION 6 3.5.2 GROSS POLLUTANT TRAPS 7 3.5.3 CALCULATIONS 7 4 STORMWATER QUANTITY MANAGEMENT 9 4.1 STORMWATER QUANTITY MANAGEMENT ASSESSMENT 9 4.2 Q100 FLOOD ASSESSMENT 9 4.3 LAWFUL POINT OF DISCHARGE 9 4.4 10 YEAR ARI – CONTRIBUTING CATCHMENT FLOWS 9 4.4.1 EXISTING SCENARIO 10 4.4.2 PROPOSED DEVELOPMENT SCENARIO 10 4.5 100 YEAR ARI – CONTRIBUTING CATCHMENT FLOWS 11 4.5.1 EXISTING SCENARIO 11 4.5.2 PROPOSED DEVELOPMENT SCENARIO 11 5 CONCLUSION 13 APPENDICES Appendix A Preliminary Layout Plans Appendix B Proprietary Product Information Appendix C Noosa Council River and Storm Tide Flood Mapping Appendix D Development Site Catchment Area Plan Appendix E PCdrain Analysis Results Appendix F 10 year ARI – Rational Method Calculations Appendix G 100 year ARI – Rational Method Calculations Mogpropmanagement Pty Ltd Page ii 205-002-002R Stormwater Management Plan Noosaville Site
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1 Introduction
Projex Partners have been engaged by Mogpropmanagement Pty Ltd to prepare a
Stormwater Management Plan (SMP) to support a Material Change of Use
application for the proposed development at Lot 102 on SP241371 located at
Gateway Drive, Noosaville. The site is approximately 0.127 ha in area and is
proposed to be developed for a tyre retailer.
The object of this Stormwater Management Plan is to demonstrate how this
development will comply with Council’s stormwater management requirements. More
specifically the objectives are to demonstrate the following:
How stormwater will discharge to a lawful point of discharge;
How the impacts of stormwater run-off quality and quantity will be reduced.
This SMP has been prepared with consideration of the following documentation:
The Noosa Plan, Planning Scheme Policy 5- Engineering Design Standards-
Roads, Drainage and Earthworks;
Queensland Urban Drainage Manual (2013);
Music Modelling Guidelines Version 1.0 – 2010 (Water By Design, 2010);
Urban Stormwater Quality Planning Guidelines (Department of Environment
and Heritage Protection, 2010);
Institute of Engineers, Australia Soil Erosion and Sediment Control
Engineering Guidelines for Queensland Construction Sites;
Preliminary layout plans at Appendix A.
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2 Site Conditions
2.1 Existing Conditions
2.1.1 Location
The site is located on the corner of Gateway Drive and Eumundi-Noosa Road,
Noosaville. Figure 2.1 provides a site locality map.
Figure 2-1 Proposed development layout
2.1.2 Site Topography
The site is covered by grass, scattered shrubs and young trees. A vegetated buffer
exists along the southern boundary of the site. The site generally falls to the
northwest corner of the site at an approximate grade of 10% and discharges to
Gateway Drive. The maximum level on the site is approximately R.L 22m AHD at the
south boundary, falling to R.L 17.0m AHD in the northwest corner.
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2.1.3 Existing Land Use
The development site presented in Figure 2.1 is identified as Lot 102 on SP241371.
The site is currently vacant. The site is bound by Gateway Drive on the east and
west. The eastern Gateway Drive joins the Eumundi-Noosa Rd/Rene St roundabout.
The western leg of Gateway Drive joins the eastern leg of Gateway Drive and
Eumundi-Noosa Rd. A vacant land parcel shares the southern boundary of the site. A
faction impervious of 50% has been assumed for the site and catchment contributing
to the underground drainage system in Gateway Drive.
2.2 Developed Conditions
2.2.1 Description of Proposed Development
The proposed development will consist of a tyre retailer (578.9m2) and provide 15 car
parks. The site will have a 95% fraction impervious area.
2.2.2 Proposed Stormwater Drainage Infrastructure
The proposed stormwater drainage concept consists of the following:
An internal stormwater drainage network for the proposed development site
designed to convey 10 year ARI flows;
Flows associated with 10 year ARI rain events will be directed to the existing
drainage infrastructure on Gateway Drive;
Provision for 100 year ARI flows to be conveyed to Gateway Drive.
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3 Water Quality Management
3.1 General
Water quality issues are associated with both the construction and operational
phases of the development.
Stormwater run-off will be managed and treated in accordance with the principles of
Water Sensitive Urban Design with the objective of improving stormwater quality by
removing nutrients, suspended solids and gross pollutants prior to discharge from the
development site.
3.2 Temporary Water Quality Control
Temporary water quality control measures are required to control and filter the run-off
from areas disturbed during construction. These are typically erosion and sediment
control measures and should be the first items constructed when works begin. As
part of the construction drawing set, a construction Erosion and Sediment Control
Plan (ESCP) will be required to be generated. During the construction phase of the
development, an ESCP will be required to minimise the impacts upon water quality.
Construction disturbance and management of water release affected by acid sulphate
soils will also require consideration. An appropriate acid sulphate soil management
plan may be required to be developed and approved by the Department and
Environment and Heritage Protection (DEHP) prior to commencement of construction,
should investigation determine it is required.
3.3 Permanent Water Quality Control
Permanent water control works are to be implemented to control run-off water quality
beyond the initial construction and maintenance stages. These control measures will
manage water quality control during the operational phase of the development and
have been designed to meet water quality objectives as described below.
3.4 Water Quality Objectives
In accordance with the Urban Stormwater Quality Planning Guidelines (EHP, 2010),
design of treatment systems will aim to meet the following pollution load reduction
targets at the lawful point of discharge:
Total suspended solids reduction of 80% from an unmitigated development
case.
Total phosphorus reduction of 60% from an unmitigated development case.
Total nitrogen reduction of 45% from an unmitigated development case.
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Gross Pollutant reduction of 90% from an unmitigated development case.
3.5 Implementation
Water quality objective targets have been demonstrated to be met by implementing
treatments through stormwater detention/filtration systems located near the northern
boundary of the site and gross pollutant traps to reduce nutrient loadings, suspended
solids and gross pollutants.
A possible treatment train for the site has been developed based on the preliminary
drawing no. SK-02 Rev P5 by Michael Carr Architects, which outlines the proposed
site layout as shown on Figure 3.1 below. Drawing no. 205-002-C10.01 (refer
Appendix A) depicts the stormwater layout plan.
Figure 3.1 Proposed development layout
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Figure 3.2 MUSIC layout summary
The treatment train includes the following stormwater quality measures (refer Figure
3.2):
All flows from the site will be directed to field inlet pits containing gross
pollutant traps/filter bags (EnviroPod 200 or similar);
Flows from all catchments, will discharge to the end of line underground
stormwater detention/filtration system (ZPG Stormfilter or similar) through a
piped network before discharging to the external stormwater system.
Preliminary assessment has indicated that water quality treatment utilising the
filtration devices can be provided in one location on the site (refer to drawing no. 205-
002-C10.01 in Appendix A) with further consideration given to appropriate final
locations to be undertaken at detailed design stage.
Specific aspects of the treatment train are discussed in further detail in the sections
below.
3.5.1 Stormwater Detention with Filtration
Stormwater from all site catchments (refer to drawing no. 205-002-C13.01 in
Appendix A) is proposed to be treated by a Stormwater360 detention system (or
approved equivalent) with a 4 cartridge ZPG Stormfilter system (Stormfilter
requirements determined in accordance with Stormwater360 product information -
refer product information provided by Stormwater 360 in Appendix B).
Maintenance frequency of the system is determined by the pollutant loading and in
this case, the system is expected to require annual maintenance.
Access will need to be provided for the maintenance and cleaning of the stormwater
filters due to their location within the product. Refer to product brochures in Appendix
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B for further information on cleaning and maintenance of the detention/filtration
system.
3.5.2 Gross Pollutant Traps
All field inlet pits are proposed to contain gross pollutant traps/filter bags (EnviroPod
200 or similar) prior to discharging to the stormwater quality device as discussed in
Section 3.5.1.
Refer to product brochures in Appendix B.
Based on the manufacturer’s advice, it has been estimated that the average cleanout
frequency is approximately once annually.
Clear and unobstructed access to the GPT’s will be required in order to regularly
clean and maintain the devices. GPT’s have been located within the proposed
driveway and as such are accessible by vehicles for servicing. The current proposal
shows nominal locations to demonstrate appropriate access for maintenance. Refer
to product brochures in Appendix B for further information on cleaning and
maintenance of the gross pollutant traps.
3.5.3 Calculations
Reference is made to the attached drawing no. 205-002-C13.01 (Appendix D) which
details the development site catchment area requiring treatment by the system, post
development.
The treatment train which incorporates a stormwater detention/filtration system and a
gross pollutant trap was completed using the Model for Urban Stormwater
Improvements Conceptualisation (MUSIC) software to estimate system performance
against the water quality objectives.
The treatment train effectiveness (refer to Figure 3.4 overleaf) shows the total
suspended solids (TSS), total phosphorus (TP) and total nitrogen (TN) load removal
performance for the treatment train which demonstrates achievement of the water
quality targets detailed in Section 2.4 – Water Quality Objectives.
Figure 3.2 provides the layout of the source and treatment nodes used in the water
quality modelling.
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Figure 3.4 MUSIC Pollutant Load Reductions Mogpropmanagement Pty Ltd Page 8 205-002-002R Stormwater Management Plan Noosaville Site
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4 Stormwater Quantity Management
4.1 Stormwater Quantity Management Assessment
The stormwater quantity management assessment demonstrates that overland flow
within the network is reduced as a result of this development and is therefore not
expected to adversely impact on the stormwater network. Further details are outlined
in the following sections.
4.2 Q100 Flood Assessment
Review of Noosa Shire Council’s storm tide information map for area 10-D34 (which
includes this site) confirms that the site is not subject to storm tide inundation.
Additionally, the river flood information map 10-D34 map confirms that the site is not
subject to river inundation.
Refer to Council maps attached in Appendix C.
4.3 Lawful Point of Discharge
The existing stormwater overland flow from the site currently sheet flows across the
subject property and discharges towards the northeast and northwest sections of the
site onto Gateway Drive.
The proposed development will maintain a lawful point of discharge to Gateway Drive.
4.4 10 Year ARI – Contributing Catchment Flows
The total site area (0.1266 ha) accounts for less than 5% of the total catchment area
associated with the overall stormwater network system (2.66 ha) and as such,
assessment of stormwater quantity has been undertaken on the assumption that the
additional flows resulting from the development will be negligible. Furthermore, it is
assumed that the recently constructed stormwater network along Gateway Drive, east
of the development site has been designed with sufficient capacity to allow for
development of the site. Therefore, this assessment will utilise the Rational Method
for comparative purposes to identify flows associated with the pre and post
development scenarios for the 10 year and 100 year ARI rain events.
Analysis of the minor event recognises the requirements pertaining to pipe capacity
for commercial development in accordance with QUDM is for a 10 year ARI. PCdrain
was utilised to model the internal stormwater network to ensure the requirements of
QUDM are achieved. Results of the analysis confirm that the proposed internal
stormwater network is sufficient to accommodate 10 year ARI flows. Results are
presented in Appendix E.
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Drawing number 205-002-C13.01 in Appendix D indicates the development site
catchment area for which this assessment was undertaken.
Analysis of the two scenarios indicates that there is negligible difference between the
pre and post development scenarios. A summary of the 10 year ARI analysis for each
scenario is provided as outlined below.
4.4.1 Existing Scenario
As outlined in Section 2.1.2, the existing site is predominately grassed with sparse
vegetation. As such, a fraction impervious of 0 is applicable and a subsequent C10
factor of 0.70 was applied based on Table 4.5.4 of QUDM. The site has an
approximate grade of 11% to the north over a distance of approximately 35m. Based
on Table 4.6.4 and Figure 4.6 of QUDM, a time of concentration of approximately 10
minutes was adopted for the undeveloped scenario (Refer Appendix F).
The analysis of the existing scenario utilising the above parameters for the Rational
Method determined that the undeveloped site contributes 43 l/s to Gateway Drive for
a 10 year ARI rain event. This is shown in Appendix F.
4.4.2 Proposed Development Scenario
The proposed development is for a commercial tyre retailer which corresponds to a
fraction impervious of 0.90 in accordance with Table 4.5.1 of QUDM (refer Appendix
F). A time of concentration of 5 minutes has been adopted for the developed scenario
based on the site being a relatively small catchment area which consists of
predominately paved surface. This supports a conservative approach.
The analysis of the developed scenario utilising the above parameters for the
Rational Method determined that the developed site will capture 69 l/s for a 10 year
ARI rain event. Therefore, the internal drainage infrastructure associated with the
development will be designed to accommodate a minimum flow of 69 l/s as required
in QUDM for commercial developments.
The proposed development connection to the existing pipe network is shown on
drawing no. 205-002-C10.01, which shows the indicative connection to the pit located
on Gateway Drive, northwest of the site.
Notwithstanding the above assessment, further detailed design of the internal
stormwater system and connection to the existing pipe network will be required to be
undertaken as part of the future Operational Works application for the development.
Thus, although the analysis indicates an increase of 26 l/s of flow captured onsite as
a result of the development, all flows associated with the 10 year ARI will be
accommodated by the internal stormwater network system. The additional flow is
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minimal and the external stormwater network is assumed to have sufficient capacity
to accommodate these flows. Refer Appendix F for calculations.
4.5 100 Year ARI – Contributing Catchment Flows
For comparative purposes, analysis of the major 100 year ARI event has been
undertaken utilising the Rational Method in accordance with QUDM for the pre and
post development scenarios. The parameters for the pre and post development
scenarios remain consistent with those utilised for the 10 year ARI analysis
respectively.
A summary of the 100 year ARI analysis for each scenario is provided as follows.
Refer Appendix G for the pre and post development flow calculations for the 100 year
ARI rain event.
4.5.1 Existing Scenario
The contributing flow associated with the existing scenario for the 100 year ARI rain
event was determined utilising the Rational Method to be 74 l/s. The overland flow
currently contributes to the two pits located on Gateway Drive, north of the site.
4.5.2 Proposed Development Scenario
The resultant overland flow for the proposed development scenario has been
determined for the 100 year ARI to be 113 l/s utilising the Rational Method. However,
considering that the developed scenario will include an internal stormwater network
which is required to accommodate flows associated with the 10 year ARI rain event,
the overland flow contributing to Gateway Drive will not exceed 44 l/s. Table 4.1
outlines the overland flow associated with the 100 year ARI event for the developed
scenario.
Table 4-1 Overland flow - Post development
Qtotal (l/s) Qpipe (l/s) Qoverland(l/s)
113 69 44
The above comparative assessment demonstrates that the proposed development
scenario results in a reduction in overland flow in the catchment i.e. 44 l/s (developed
scenario) compared to 74 l/s (existing scenario). Refer to Appendix G for calculation
of both scenarios for the major event.
As mentioned previously, this assessment has been undertaken on the basis that the
recently constructed stormwater network on Gateway Drive on the east side of the
site will have sufficient capacity to accommodate flows associated with the
development for the 10 year ARI rain event. In this case, the development will result
in less overland flow contributing to Gateway Drive through provision of an internal
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stormwater network with the capacity of accommodating 10 year ARI flows. Table
Furthermore, the developed scenario results in an overall reduction in flow width in
comparison to the pre development scenario. Table 4.2 outlines the reduction in
overland flow contributing to Gateway Drive as a result of the development.
Table 4-2 Overland flow contributing to Gateway Drive
Scenario 10 year ARI (l/s) 100 year ARI (l/s)
Pre development 43 74
Post development 0 44
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5 Conclusion
Water quality objectives have been demonstrated to be achieved through the
implementation of a treatment train that incorporates gross pollutant traps/filter bags
and a ZPG Stormfilter system to reduce total suspended solids (TSS), total
phosphorus (TP), total nitrogen (TN) and gross pollutants.
Appropriate erosion and sediment control measures will be required to be prepared
and implemented on site during construction activities in order to minimise water
quality impacts during the construction phase.
The stormwater quantity management assessment demonstrates that overland flow
within the network is reduced as a result of this development by the inclusion of the
pipe network on the development site. Gateway Drive will therefore benefit as result
of reduced overland flow contributing to the road.
A PCdrain analysis determined that the proposed internal stormwater network was
sufficient to accommodate 10 year ARI flows.
Notwithstanding the assessment, further detailed design of the internal stormwater
system and connection to the existing pipe network will be required to be undertaken
as part of the future Operational Works application for the development.
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ProjexPartners q APPENDIX A Preliminary Layout Plans
Page 18
LEGEND
17 New Contours (0.1m Intervals)
New Concrete Driveway
New Proposed Buildings
New Landscaping / Streetscaping
New Kerb / Kerb & Channel
BUNNINGS WAREHOUSE New Drainage Pipe
Lot 101
SP241371
Field Inlet / Gully Pit
SHOPPING PRECINCT
Lot 308
SP114181
NEW R
VE O AD
18.0
17
DRI
.5
17
.0
Concrete Industrial Driveway
Y
.5
crossover. Refer to IPWEAQ
EWA
1818.5
18.5 54. Std. Drg. SEQ R-051
9
GAT
50
.0
17.0
19
45.0
Existing footpath to be removed .0
40.0
35.0
to allow for driveway construction.
17
30.0
25.0
.5
19.0
0.0
20.0
5.0
15.0
10.0
18
18
Concrete Industrial Driveway
.0
.5
crossover. Refer to IPWEAQ Lot 102
19.5
Std. Drg. SEQ R-051 SP241371
Proposed Building
20.0
19.5
20.0
W:\205 Mogprop Management\205 002 MCU Gateway Dve Noosaville\Drawings\205-002-WORKING.dwg
19.5
Lot 500
SP114181 Existing Vegetation Area
Lot 500
to remain
SP241371
Park
AD
N DI NO OSA RO
EUMU
OVERALL LAYOUT
SCALE: 1:500 (A3)
PRELIMINARY ISSUE
CLIENT APPROVED SCALE
LOT 102 SP241371 GATEWAY DRIVE, NOOSAVILLE
MOGPROP 1:250 0 5 10 15 A1
PROJECT MANAGEMENT - ENGINEERING - PLANNING
MANAGEMENT PTY LTD 1:500 A3 OVERALL LAYOUT PLAN
SUNSHINE COAST MACKAY CAIRNS RPEQ
(07) 5493 3649 (07) 4957 4988 (07) 4041 5118 1 PRELIMINARY ISSUE 07/08/14 RH KP JB ---- DRAWING NUMBER REVISION
projexpartners.com.au No. Description Date Drawn Design Check RPEQ 205-002-C03.01 1
THIS DRAWING MAY ONLY BE USED FOR THE PURPOSE FOR WHICH IT WAS PREPARED BY PARTIES AGREED TO BY PROJEX PARTNERS & MUST NOT BE USED BY ANYONE ELSE OR FOR ANY OTHER PURPOSE
Page 19
ProjexPartners q APPENDIX B Proprietary Product Information
Page 20
Operations and maintenance
StormFilter EnviroPod Treatment Train
®
Our waterways. Our future.
Page 21
Device details Location of Device GPS Coord N: D P Number: Relevant Council Company Contact Email Ph Engineer Contact Email Ph SFEP Treatment Frequency of Inspection/Maintenance Inspections (time/year) Major Maintenance StormFilter EnviroPod Contents Treatment Train Specifications 2 Introduction 4 Why cleaning and maintenance are so vitally important 4 Health and safety 5 24 Personnel health and safety 6 2.2 Traffic control 7 2.3. Confined spaces 7 34 Maintenance and monitoring of EnviroPod filters 8 Operations 8 3.2 Stormwater pit cover removal 9 3.2.1 Hinged pit grates 9 3.2.2 Non-hinged pit grates 10 3.3. Cleaning methods a 3.3.1. Cleaning using an inductor truck a 3.3.2 Hand maintenance an] 3.4 Unit inspection 14 3.5 — Filter bag inspection and rejuvenation 14 3.5.1 Clogged filters 14 3.5.2 Damaged filters 15 3.6 Disposal of material 15 4A Spill procedures 16 4.2 Blockages 16 Emergency procedures 16 Maintenance Estimated Annual Cost StormFilter EnviroPod TOTAL The Stormwater Management StormFilter 14 1.2 1.24 1.2.2 Description Operation Purpose Sizing StormFilter overview 1.2.3 1.2.4 1.2.5 Basic function Priming system function Maintenance overview StormFilter maintenance and performance expectations 24 2.2 2.24 2.2.2 2.3 24 244 2.4.2 2.4.3 2.4.4 2.5 2.6 Types of maintenance Maintenance activities Maintenance activity timing Maintenance activity frequency Maintenance crew requirements Maintenance methods Minor maintenance/inspection (twice a year) Major maintenance inspection (once a year) Major maintenance: sediment removal and cartridge replacement (and emergency) Related maintenance activities (performed on an as-needed basis) Typical equipment required for maintenance activities Material Disposal Next steps
Page 22
Maintaining the EnviroPod ®
Stormwater Gully Pit Insert
Maintenance is as integral to every stormwater management
system as it is to any other item of machinery or equipment.
The primary purpose of the EnviroPod® Stormwater Gully Pit
insert is to filter out and remove pollutants from entering
our waterways. To ensure that the EnviroPod® continues
to function effectively, it is important that the pollutants
it captures are periodically removed, and the filtration
components properly cleaned.
Maintenance requirements and frequency are dependent
on the pollutant load characteristics of each site, as well
as the occurrence of events such as chemical spills or
excessive sediment loading due to site erosion or extreme
storms. Similarly, the system should be inspected after all
major storm events.
Stormwater360 Operations and maintenance 1
Page 23
Treatment Train
Specifications
Regardless of the system type, the media filtration system
Performance Specification shall consist of the following components;
The stormwater filtration treatment train shall consist • Inlet energy dissipation
of x 200 micron gully pit basket/s and x • Cartridge section
460/690mm passive, siphon-actuated, radial flow, self • Outlet section to bypass storm flows and convey
cleaning media filtration cartridge system/s operating at a treated stormwater
specific flow rate of not more than 1.5L/s/m2.
• Access Lids in roof slab for access to Cartridges
• Siphon actuated cartridges filled with proprietary
The gully pit basket system shall consist of the
ZPG™ filter media
following components;
• Specific flow rate of each individual cartridge limited
• Removable 200 micron Nylon monofilament Precision
not to exceed 1.5L/s/m2
woven Filtration Bag
• Air Lock Cap complete with one way Air Valve Flap
• Fixed Galvanised Mesh Cage (no greater than 80mm x
• Outer Hood complete with Scrubbing Regulators
80mm) around the Filtration Bag
• Automated high-energy turbulence on the screen face
• Recycled modified ABS plastic to seal the unit into the pit
(only) at the end of storm flows to flush pollutants from
• By-pass mechanism above the Filter with no moving parts
the cartridge
• System rigidly fixed to the walls of the pit.
• Centre Drainage Tube complete with Buoyancy Float
The media filtration system shall be located within the • Individual Cartridge Flow Restrictor Disc
following structure.
• ¼ Turn Bayonet Fittings
• Manhole • Under drain manifold to convey treated stormwater to
• DownPipe the receiving environment.
• Linear
• Vault
• Large Box
• Detention.
2 Stormwater360 Operations and maintenance
Page 24
Components of any
proposes treatment
train or technology
The components of any proposed the treatment train Maintenance Overview
or technology, including a gully pit basket upstream
of a radial flow cartridge filtration system, must The primary purpose of the Stormwater Treatment Train is to
be evaluated for a range of pollutants and these filter out and prevent pollutants from entering our waterways.
Like any effective filtration system, periodically these
performance expectations must comply with current
pollutants must be removed to restore the system to its full
best practice guidelines, i.e. Water by Design "MUSIC efficiency and effectiveness.
Modeling Guidelines version 1.0 2010" for South
East Queensland.
aintenance requirements and frequency are
M
In short, the performance evaluation of any system dependent on the pollutant load characteristics
must show: of each site. Maintenance must be performed
in accordance with the Treatment Trains
1 Any reduction efficiencies are justified by rigorous
Operation and Maintenance Guidelines.
scientific testing as determined by an independent
peer reviewer and the results further peer reviewed and
published in a credible scientific journal. Any potential
or perceived conflicts of interest should be disclosed
within the published article.
2 Published article providing insight into the pollutant
composition (e.g. soluble vs particulate for nitrogen)
and the mean concentration of inflow and outflow to
compare to local and or regional conditions.
3 Performance evaluation undertaken in dry weather
conditions or a method to take into account any
potential leaching of nutrients that may occur in
the system(s).
4 Evaluation is conducted using full-scale systems
with details of treatable flow rates sampled and how
they correlate to discrete removal efficiencies and
comparisons to the designed treatable flow rates of
the device. A comparison should also be made to the
climatic conditions especially where un-restricted filters
are used.
Stormwater360 Operations and maintenance 3
Page 25
Introduction
This manual has been designed to assist you with cleaning
and maintaining the EnviroPod Stormwater Gully Pit Insert,
Why cleaning and maintenance are
using the methods recommended by the manufacturer. so vitally important
The cleaning process and methods described cover all
aspects of the system, including: Adhering to the inspection and maintenance schedule of
each stormwater treatment device is essential to ensuring
• Removing the grate
that it works properly throughout its estimated design life.
• Cleaning the filter bag
During each inspection and clean, details of the mass,
• Inspecting the unit
volume and type of material that has been collected
• Rejuvenating the filter bag by the device should be recorded. This data will assist
• Re-installing the filter bags. with the revision of future management plans and help
determine maintenance interval frequency. It’s also
The manual should be used in conjunction with your
essential that qualified and experienced personnel carry
site’s traffic management and safety plans, as well as
out all maintenance (including inspections, recording and
other appropriate Stormwater360 (IES) documents such
reporting) in a systematic manner. To ensure consistency, we
as the IES Employee Health and Safety Manual. We also
recommend that one person be responsible for overseeing
recommend that maintenance and cleaning contractors, or
the management of the maintenance and cleaning process.
device owners, develop their own site-specific health and
safety activity plans to ensure a safe work environment. Maintenance of your stormwater management system is
essential to ensuring ongoing at-source control of stormwater
pollution. Maintenance also helps prevent structural failures
Please note: This manual consists primarily of (e.g. prevents blocked outlets) and aesthetic failures (e.g.
the processes and tasks associated with the debris build up).
hand maintenance and inductor maintenance
procedures. It does not include details of the
site’s traffic management or occupational health
and safety requirements. Contractors or IES
staff should utilise their own Employee Health
and Safety Manual, which details the policies
and procedures for safe work.
4 Stormwater360 Operations and maintenance
Page 26
Health and safety
The EnviroPod has been designed to trap and
retain pollutants in stormwater runoff, helping he procedures indicated in the Operations
T
section of this manual are recommended as the
to maintain the quality of water entering our
safest and most efficient manner of conducting
aquatic ecosystems. Depending on the nature the maintenance of EnviroPod units (Section 2),
of your site, pollutants can range from organic however contractors and cleaning staff may
material such as leaves and sticks through to vary the procedure in response to the site
conditions; varying work practices; or general
debris such as broken glass, syringes or other
preferences in the cleaning techniques. Please
potentially harmful materials. note that procedures outlined in this manual
are not exhaustive, and that any changes
Access to gully pits containing EnviroPods may made should always comply with general safe
require removing heavy protective grates, work practices.
while cleaning such pits may entail working in
confined spaces. For these reasons, all aspects
Cleaning of EnviroPod filters and StormFilters is a specialist
of maintaining and cleaning your EnviroPod
activity. The material collected by the devices can be
require careful adherence to Occupational harmful, and needs to be handled correctly. For example,
Health and Safety (OH&S) guidelines. Doing so sediments may contain heavy metals and carcinogenic
will ensure that all maintenance personnel are substances as well as harmful objects such as broken
glass and syringes. It is essential that Occupational Safety
adequately protected and have been properly
and Health guidelines are followed at all times, and that the
trained before taking part in any specialist following steps are carried out to ensure safe and successful
activities. The same level of care needs to be maintenance operations.
taken to protect non-work personnel in and In addition to the dangers associated with the cleaning and
around the site, while appropriate traffic control handling of material in the filter bags, precaution needs
measures must be put in place where collection to be taken with activities such as removing the grate as
pits are situated in, or adjacent to, roadways or well as with managing the traffic, pedestrians and other non-
worker personnel at the site. The general workplace hazards
car parks. associated with working outdoors also need to be taken
into account..
Stormwater360 Operations and maintenance 5
Page 27
2.1 Personnel health and safety
All contractors and staff must comply with all current While cleaning and maintaining filters, all relevant precautions
workplace health and safety legislation and take all practicable must be taken to prevent contact with sediment and litter.
steps to: This includes wearing the following personal protective and
safety equipment:
• Comply with all applicable laws, regulations and standards
• Ensure that all employees, contractors and visitors are • Puncture resistant gloves
informed of and understand their obligations in respect of • Steel capped safety boots
current workplace health and safety legislation • Fluorescent safety vest
• Ensure that employees understand and accept their • Overalls or similar skin protection
responsibility to practice and promote a safe and healthy
• Safety apron (if necessary)*
work environment.
• Eye protection (if necessary)*.
* Higher personal safety conditions may be required when maintaining units
ake proper care. Pollutants can range from
T that may contain more hazardous material, for example pits where syringes
have been observed or pits located in areas associated with such activities.
organic materials such as leaves and sticks
through to debris such as broken glass,
syringes or other potentially harmful materials.
6 Stormwater360 Operations and maintenance
Page 28
2.2 Traffic control 2.3 Confined spaces
Stormwater collection pits are typically situated either in or on Confined space entry procedures are not included as part
roads and car parks, or adjacent to roads in a footpath or swale. of this manual. For IES employees these procedures are
Traffic control requirements across all such locations differ included as part of the IES Safety Manual. It is recommended
with most of the state and local road authorities requiring the that all contractors evaluate their own needs for confined
same controls to be implemented whether the work is to be space entry and compliance with Occupational Health and
conducted on the road or on the road reserve. Safety regulations.
As traffic requirements differ depending on road usage and When repairs or maintenance activities cannot be conducted
the specific road configuration, separate traffic control plans from the surface, and there is a need to enter and work in a
should be prepared for each site. Given that maintenance is confined space, only staff with current confined space training
typically a quick process, the contractor should liaise with the are permitted to operate in a confined space. Appropriate
relevant road authority to determine the specific road safety measures and controls must be put in place to meet confined
requirements for each location to ensure that on site workers space entry requirements. At all times the necessary
can conduct the cleaning operations safely and efficiently, safety equipment must be worn, and where gas or oxygen
while complying with all laws and regulations. hazards occur, only staff trained in its use will use breathing
apparatus gear. Non-trained staff must not go into
State government publications such as the NSW RMS
confined spaces.
Traffic Control at Work Sites safety manual outline the
signage requirements, placement of barricades or witches hats
and the positioning of traffic control personnel that’s required
when working on public roads. For increased safety, IES onfined spaces pose a serious safety hazard
C
recommends that the maintenance vehicle be used to shield for all personnel; however during the normal
the work area from oncoming traffic. maintenance procedures there should be no
reason to enter a confined space and all
Photo 1 shows the maintenance vehicle with cones placed maintenance procedures are able to be
around and positioned to shield the work area. Photo 2 shows conducted from the surface.
the head-on view, note the vehicle is positioned to allow
access to the drive, whilst still blocking the pit from on-coming
traffic. The vehicle has a flashing light on the roof and the
hazard lights switched on.
Photo 1 Vehicle positioned near pit, preventing traffic from Photo 2 Head-on view, indicating the placement of the
passing close to the pit. vehicle near the pit.
Stormwater360 Operations and maintenance 7
Page 29
Operations
nviroPod units need to be regularly inspected
E This section outlines the procedures for cleaning the
EnviroPod units. It has been written so that someone who
to determine whether they require maintenance
has never previously encountered a stormwater pit or an
or cleaning. This process involves several steps, EnviroPod unit can carry out such maintenance by simply
and may require two or more maintenance following the outlined steps.
personnel working together, as well the use of
specialised equipment such as a hydraulic lifting
arm or an inductor truck with a vacuum hose. 3.1 Maintenance and monitoring of
EnviroPod filters
As gully pit grates are usually quite heavy, it is
important that correct lifting procedures are adopted, To ensure that each EnviroPod unit achieves optimal
performance, the material collected by the filter bag should
and that the area surrounding the opened pit is
be emptied when the level of material is no more than
shielded from access to non-work personnel. approximately half to two thirds of the total bag depth or
when there is evidence of material overflow. While the bag has
If inspection reveals that the filter bag needs to be a greater storage capacity, it is recommended that it is not left
emptied and rejuvenated, the entire unit should also to fill completely prior to emptying, for the following reasons:
be examined to ensure that all connections and joints • the bags are capable of retaining a heavy mass of material
are sound. Any material that has accumulated in the (in excess of 50kg), which will make them more difficult to
lift and empty
overflow diversion channels or outlet pipes also needs
• material near the top of the bag can be re-suspended
to be removed, with those areas then being flushed.
during high to extreme rainfall events
Where required, filter bags may need to be cleaned
• blockage of the overflow sections can occur, when
or repaired, and all waste material must be disposed material is allowed to build up above the filter bag.
of according to local guidelines at either an approved
It is also recommended that additional monitoring is
disposal site or transfer station. conducted following moderate to extreme rainfall events,
especially when preceding months have had little or no
rainfall. This increased frequency of monitoring is necessary
as there is a greater accumulation of surface contamination
during low rainfall periods, which will then enter the unit with
the higher volumes of runoff generated during a major rainfall
event. It is also important to ensure that the units have not
been damaged due to high pipe velocities.
8 Stormwater360 Operations and maintenance
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3.2 Stormwater pit cover removal
3.2.1 Hinged pit grates
These are the steps for opening a hinged pit grate:
Please note: Many cast iron hinges are not hinged
1 Insert the lifting hooks beneath the grate.
securely (to enable the removal of the grate). This
(Position indicated in Photo 3)
may result in the pit grate not being able to sit in an
2 Check hinge point is not damaged and debris is not open position. Additionally the hinge pins may also
caught in the hinge area. be damaged or corroded, which may allow the
grate to fall into the pit. Such pit grates can be
3 Fully open pit grate, ensuring that the grate will stay in
removed using the method indicated below for
the open position without any external forces applied.
non-hinged grates.
Grates that do not remain open without being held
should be removed or secured during cleaning or
maintenance activities. Photo 4 indicates the grate being
opened and grate resting freely in the open position,
respectively.
Photo 3 Lifting the grate Photo 4 Fully open grate
Photo 5 Lowering grate
Stormwater360 Operations and maintenance 9
Page 31
3.2.2 Non-hinged pit grates
To remove a non-hinged pit grate:
1 Place lifting hooks beneath grate, where possible in the
four corners of the grate (see Photo 6). Concrete lids
may have Gatic lifting points, a key arrangement or holes
in the lid, which may require special equipment such as
Gatic lifters
2 Position each person either side of the grate
(see Photo 7)
3 Lift the grate, ensuring that good heavy lifting posture is
used at all times
4 Place the grate on an angle on the gutter, to allow for the
lifting hooks to be removed (see Photo 8)
Photo 6 Insert hook near edge of grate
5 For extremely heavy one-piece grates and concrete Gatic
covers, insert the lifters in place and slide the lids back.
Note some lids may still require two people
Photo 7 Position each lifter either side of the grate Photo 8 Lift grate and move grate to one side
Photo 9 Lift grate above the support frame Photo 10 Reinstated non hinged grate
10 Stormwater360 Operations and Maintenance
Page 32
3.3 Cleaning methods
One of the following maintenance methods should be used for servicing EnviroPod Filters:
3.3.1 Cleaning using an inductor truck 3.3.2 Hand maintenance
Follow these steps to safely and efficiently clean the To clean the EnviroPod manually by hand, follow
EnviroPod using an inductor truck: these steps:
1 Open gully pit (See Section 3.2) 1 Open gully pit (See Section 1)
2 Place the inductor hose over the material collected in the 2 Place the lifting hooks in the lifting loops of the filter bag
filter bag and switch on the inductor (See Photo 12)
3 Using the inductor hose, suck out all of the sediment, 3 For extremely heavy and overfilled bags either use a
organic leaf material, litter etc. collected in the filter bag hydraulic lifting arm to lift the bag, or remove excess
material using a shovel or similar piece of equipment.
4 Allow the filter bag to be sucked up into the inductor
IES prefers the use of a post hole shovel, due to the
hose for a few seconds to allow for the filter mesh
reduced strain on the back when digging and the ability
pores to be cleaned. Care is to be taken that there are
of the shovel to grab material vertically
no sharp edges on the inductor hose that can damage
the filter bag 4 Lift the bag vertically off the supporting frame, ensuring
that no undue pressure is placed on the filter bag.
5 If material has built up around the overflows, use the
(See Photo 13)
inductor hose to clear the accumulated material
5 Lift the bag clear of the stormwater pit (See Photo 14)
6 Remove filter bag from the pit
6 Position the bag over the truck or other collection
7 Sediment retained in the gully pit grate is to be removed
vehicle, taking hold of the loops at the base of the bag
8 Back-opening channels are to be cleared of any debris (See Photo 15 and Photo 16)
to ensure flow is not hindered. This debris can also be
7 Lift and empty the filter bag by holding the bottom
collected using the inductor truck
lifting loops only (See Photo 17)
9 All gully pit waste is to be removed from the pit
8 Completely empty the filter bag (See Photo 18)
10 Check the EnviroPod unit (Section 3.4)
9 Brush the filter bag with a stiff brush to remove bound
11 Check filter bag (Section 3.4) sediment from the filter pores
12 Reinstate filter bag and gully pit lids 10 Check the EnviroPod unit (Section 3.4)
11 Check the filter bag (Section 3.5)
12 Reinstate filter bag, ensuring bag is installed the correct
way (See Photo 19 and Photo 20)
13 Reinstate gully pit lids (See Photo 21 and Photo 22)
Photo 11 Cleaning an EnviroPod using the inductor method
Stormwater360 Operations and Maintenance 11
Page 33
Photo 12 Place the lifting hooks through the bag loops Photo 13 Lift the bag from the cage and support frame Photo 14 Lift the bag from the stormwater pit Photo 15 Lift the bag onto the collection vehicle Photo 16 Grab the bottom lifting loops Photo 17 Lifting the bottom bag loops empty the filter bag 12 Stormwater360 Operations and maintenance
Page 34
Photo 18 Completely empty the contents of the filter bag Photo 19 Reinstall filter bag
Photo 20 Ensure that the unit is positioned correctly, Photo 21 Correctly installed filter bag
with the lifting loops on the inside
Please note: Under no circumstances are
gully pit sediments to be backwashed into
the gully pit.
Photo 22 Installed filter bag and sealed pit
Stormwater360 Operations and maintenance 13
Page 35
Photo 23 Check seals are pushed against the pit walls Photo 24 Check joining rivets (two piece unit shown above)
3.4 Unit inspection 3.5 Filter bag inspection
After the EnviroPod filter bag has been removed, emptied
and rejuvenation
and cleaned, the following should be checked to ensure that
the unit has not been damaged: After the filter bags have been emptied and cleaned, they
should be inspected to evaluate their condition. Given the
• All connections and joints should be checked and broken nature of stormwater, the filter bag may become considerably
rivets replaced (See Photo 23) clogged with fine sediment or damaged by various objects
• The plastic pit seals should be inspected for unit in stormwater as well as fauna. Sharp material such as sticks,
movement or damage (See Photo 24) combined with high velocity water and a large mass in the
• The cage should be inspected for damage or movement. filter bag, can cause small tears in the filter material. Animals
such as rats have also been known to chew through fine mesh
The overflow diversion channels, and the area between the
filter bags located in gully pits near takeaway food outlets.
EnviroPod cage and pit wall should also be inspected for any
accumulated debris. Any observed debris should be removed
and disposed of off-site. Accumulated material within the 3.5.1 Clogged filters
outlet pipe may also need to be flushed.
Clogged filter bags can be cleaned using several different
If spare parts are required, Stormwater360 is able to provide methods. If the techniques described in the general
these at a cost to the owner of the EnviroPod unit, although maintenance sections above do not adequately clean the filter
these parts may also be obtained from other suppliers. bags, the following options should be considered:
• Using a stiff brush and a bucket of soapy water, scrub the
filter bag surface.
Please note: If the units are not cleaned
• Remove filter bags from the pit and wash the bags using a
regularly, the mobilisation of material collected
high pressure water spray, taking care not to transfer the
in the EnviroPod unit may occur. As such,
contamination elsewhere. Wastewater from the process
cleaning of the units in accordance with this
should be collected and disposed of correctly.
management plan is required. As this plan is
based on observations and data collected • Remove the filter bags from the pits and the support rings
during the monitoring period, ongoing and wash the bags in an industrial washing machine.
adjustment of the cleaning frequency is This final option typically results in the bags appearing
generally required to improve the overall like new, with no visible stain or pore clogging within the
efficiency in the removal of collected material filter mesh.
and prevent material overflow.
14 Stormwater360 Operations and maintenance
Page 36
Photo 25 Slightly clogged filter bag, indicated by the brown Photo 26 A clean used filter bag
stain on in the centre of the bag
3.5.2 Damaged filters 3.6 Disposal of material
Damaged filter bags can often be repaired, provided the All gully pit wastes are to be taken off site and disposed
damage is small. Small tears in the fabric may occur due to of at a transfer station or similar approved disposal site.
several reasons, however the overall strength and structure Stormwater sediments can contain lead, copper, zinc,
of the nylon fabric typically prevents small tears becoming mercury, hydrocarbons and PCBs, which are harmful to
much larger. Although the bag is unlikely to tear further, care both humans and the receiving environment. Appropriate
must be used when cleaning torn bags so as not to spill the sampling and laboratory analysis may be required to
collected material into the pit. classify the material as suitable for reuse, or disposal under
Small tears may be repaired by either sewing the tear back appropriate local guidelines.
together with additional fabric to increase the strength of the
stitching, or by sewing a patch of the filter material onto the
filter bag. If large tears are present, the filter bag may need to
be replaced as it is no longer able to function as intended.
Stormwater360 Operations and maintenance 15
Page 37
Emergency procedures
Spills and blockages can have an immediate impact on 4.2 Blockages
the performance of a stormwater management system,
and can potentially result in serious damage to built In the unlikely event of surface flooding around a gully pit
infrastructure as well as the surrounding waterways fitted with an EnviroPod the following steps should be
carried out:
and wetlands.
1 Check EnviroPod overflow bypass. The EnviroPod filter
has been designed with an overflow mechanism built
In these types of emergencies, it is important to act
into the filter box. If surface flooding still exists, check
quickly to remediate the problem by removing affected the overflow slots underneath the rubber seal. If debris
sediment or clearing the cause of the blockage, so is lodged in the overflow slots it can be easily cleared by
that the system can resume normal and effective hand or a steel rod.
functioning as soon as possible. 2 If overflow is clear and surface flooding still exists remove
EnviroPod and check outlet pipe for blockages.
Removal of the EnviroPod may be difficult if the filter is
4.1 Spill procedures 3
clogged and the EnviroPod is holding water. If the filter
is clogged, brush the sidewalls of the filter with a yard
In the event of a spill discharging into any gully pit, all broom or similar. This will dislodge particles trapped
sediment is to be extracted and the filter bags are to at the interface allowing contained water to flow
be removed and replaced with rejuvenated filter bags. through the filter.
Normal operation procedures apply to additional cleaning
as a result of spills. 4 If the outlet pipe is blocked, it is likely that a gully
sucker truck will be required to unblock it. Debris
should be removed from the EnviroPod with the gully
sucker truck before removal of the EnviroPod filter. If
a gully sucker truck is not available and the EnviroPod
needs to be removed by hand, follow the steps below:
a Remove excess debris by hand or brush the side
of the filter.
b Lift and place filter ring through the filter box and
into cage.
c Remove Filter box.
d Lift cage containing filter bag and ring out of the pit.
e Unblock outlet pipe.
16 Stormwater360 Operations and maintenance
Page 38
The Stormwater
Management StormFilter
®
For almost two decades the Stormwater Management
StormFilter ® has helped meet the most stringent stormwater
quality requirements.
The system has been continually tested and refined, to
ensure it achieves maximum reliability and performance.
As a best management practice (BMP) system, it removes the
most challenging target pollutants – including fine solids,
soluble heavy metals, oils and total nutrients (including
soluble) – by using a variety of media to achieve site-specific
pollutant removal objectives.
Stormwater360 Operations and maintenance 17
Page 39
StormFilter overview ®
1.1 Description 1.2.2 Sizing
The StormFilter is typically sized to meet design water quality
StormFilter is a passive, flow-through stormwater filtration
objectives, which are subject to legislation regulated by local
system consisting of vaults that house rechargeable
government authorities and other relevant environmental
cartridges filled with a variety of filter media, and is installed
bodies. MUSIC modelling software is used to determine
in-line with storm drains. The StormFilter works by passing
pollutant loads from a site, influenced by a number of factors
stormwater through media-filled cartridges, which trap
such as site area, imperviousness and land use. Pollutant
particulates and adsorb materials such as dissolved metals
load reduction capabilities, based on third party testing,
and hydrocarbons. After being filtered through the media,
allows the number of StormFilter cartridges required to
the treated stormwater flows into a collection pipe or
achieve the relevant objectives to be established. Cartridges
discharges into an open channel drainage way. StormFilter
are designed to treat a peak flow between 0.7 and 1.6 litres/
is offered in three different configurations: cast-in-place,
second, depending on the cartridge size used. For example,
precast and linear. The precast and linear models utilise
10 standard sized cartridges (460mm) are able to treat 11
pre-manufactured vaults. The cast-in-place units are
L/s, as each filter can treat 1.1 L/s.
customised for larger flows and may be either covered or
uncovered underground units. Because of the highly porous nature of the granular filter
media, the flow through a newly installed cartridge is restricted
to 1 L/s (average 460mm), using a restrictor disc, to ensure
1.2 Operation adequate pollutant-media contact time.
1.2.1 Purpose
The StormFilter is a passive stormwater filtration system
designed to improve the quality of stormwater runoff from
the urban environment before it enters receiving waterways.
Through independent third party studies, it has been
demonstrated that the StormFilter is highly effective for
treatment of first flush flows, and fast-paced flows, during
the latter part of a storm. In general, StormFilter’s efficiency
is highest when pollutant concentrations are highest.
The primary target pollutants for removal are: sediments
(TSS), soluble metals, soluble phosphorus, nitrates, and
oil and grease.
Photo 27 Filter cartridge
18 Stormwater360 Operations and maintenance
Page 40
1.2.3 Basic function 1.2.5 Maintenance overview
The StormFilter is designed to siphon stormwater runoff The primary purpose of the StormFilter is to filter out and
through a filter cartridge containing media. The variety of prevent pollutants from entering our waterways. Like any
media available can be designed to act as a mechanical effective filtration system, these pollutants must be removed
filter to remove sediments, as an ion exchanger to remove periodically to restore the StormFilter to its full efficiency and
dissolved heavy metals, and as an absorber to remove oils effectiveness. Maintenance requirements and frequency are
and greases. dependent on the pollutant load characteristics of each site.
To assist the owner with maintenance issues, Stormwater360
provides detailed Operation and Maintenance Guidelines with
1.2.4 Priming system function
each unit.
The treated stormwater collects in the centre tube of the Stormwater360 can provide maintenance services completely,
cartridge, which is equipped with a self-priming siphon or in part. Available services include tracking of installed
system. (Figure 1 illustrates this system.) The key component systems, advising the system’s owner of maintenance needs,
of the system is the plastic float, consisting of a ball located and notification of the regulatory agency once the system has
at the base leading up to a larger portion, which provides been maintained.
increased buoyancy. Initially the ball rests in a seat,
Maintenance is usually performed in the dryer periods
effectively closing off the port to the drainage manifold.
to rejuvenate the filter media and prepare the system for
As a result, the filter fills the centre drainage tube until the the next rainy period. Maintenance activities can also
water level has risen high enough to purge the air from the be required in the event of a chemical spill or excessive
filter cartridges and displaces the float. At a water depth of sediment loading due to site erosion or extreme storms.
22 inches the float pulls loose and allows the filtered water It is good practice to inspect the system after severe
to drain out through the manifold. This effectively “primes” storm events.
a siphon within the drainage tube and greatly increases the
potential across the filter. The priming system increases
StormFilter’s ability to be loaded with sediment. A related AIR LOCK CAP WITH CHECK VALVE
LIFTING TAB
feature is the cartridge “hood”. This hood maintains the FLOAT VALVE
siphon effect by preventing air from being drawn into the
cartridge until the external water level drops below the OUTER MESH
FILTER MEDIA
bottom of the hood.
HOOD
CENTER TUBE
Cartridges are connected to the manifold with a plastic
SCRUBBING REGULATOR
connector. These can be either quarter turn connectors or in
the older systems, threaded connectors. UNFILTERED WATER
UNFILTERED WATER
StormFilter is also equipped with flow spreaders that trap UNDER- DRAIN
FILTERED WATER
MANIFOLD
floating debris and surface films, even during overflow
conditions. Depending on individual site characteristics, FILTERED
WATER
some systems are equipped with high and/or low flow
bypasses. High flow bypasses are installed when the UNDER-DRAIN MANIFOLD
VAULT FLOOR
CAST INTO VAULT FLOOR
calculated peak storm event generates a flow that
overcomes the overflow capacity of the system. This is Figure 1 Filter cartridge
especially important for precast systems. Low flow bypasses
are sometimes installed to bypass continuous inflows
caused by ground water seepage, which usually do not
require treatment. All StormFilter units are designed with
an overflow. The overflow operates when the inflow rate is
greater than the infiltration capacity of the filter media.
Stormwater360 Operations and maintenance 19
Page 41
StormFilter maintenance ®
and performance
expectations
To ensure the optimal and ongoing performance of the While some maintenance activities can be completed
by hand, others require specialised equipment such as
StormFilter, the system requires systematic inspection,
an inductor truck with a vacuum hose. In all cases, it is
cleaning and maintenance. This maintenance important that maintenance staff are properly trained
regime falls into two categories – ongoing minor in the functioning of the StormFilter system and have a
inspection and maintenance, and major cleaning and good knowledge of the correct procedures for disposing
contaminated sediment as well as the methods for removing
maintenance. The maintenance frequency is largely
and installing StormFilter media cartridges.
determined by the conditions of each site, and the
At all times, appropriate safety equipment must be used, and
amount of sedimentation in the stormwater runoff
Occupational Health And Safety (OH&S) guidelines adhered to.
that flows through the system. Unexpected events
such as chemical spills, erosion or extreme storm
activity require immediate inspection of the system,
together with removal of debris or contaminated
sediment, and where appropriate, replacement of the
media cartridges.
20 Stormwater360 Operations and maintenance
Page 42
2.1 Types of maintenance
Presently, procedures have been developed for two levels Inspection/minor maintenance typically involves opening
of maintenance: the flow restricting valves (to pre-set levels) and cleaning up
vegetation and debris. Major maintenance typically includes
• Inspection and/or minor maintenance
cartridge recharging. Major maintenance may involve disposal
• Major maintenance. of materials that require consideration of regulatory guidelines.
Inspection/minor maintenance activities are combined since Depending on the particular unit configuration and equipment
the minor maintenance does not require special equipment used, major maintenance may require an understanding
and typically little or no materials are in need of disposal. of OSHA rules. Table 1 summarises the primary activities
associated with StormFilter maintenance.
Table 1: StormFilter
Facility component Maintenance activity When maintenance Expected facility performance
requiring maintenance activity is required after maintaining
StormFilter cartridges Litter and Floatable objects or other litter Permanent removal from
and containment structure debris removal is present in the filter. Remove storm system.
to avoid hindrance of filtration
and eliminate unsightly debris
and litter.
StormFilter cartridges Cartridge replacement Media has been contaminated New media is able to effectively
and containment structure and sediment removal by high levels of pollutants, treat stormwater.
such as after a spill.
Drainage system piping Flushing with water Drainage system is obstructed Outflow is not restricted.
by debris or sediment.
Stormwater360 Operations and maintenance 21
Page 43
2.2 Maintenance activities 2.2.2 Maintenance activity frequency
The primary factor controlling timing of maintenance for the
StormFilter is sedimentation. A properly functioning system
2.2.1 Maintenance activity timing will remove solids from water by trapping these particulates
within the porous structure of the media. The flow through
Two scheduled inspections/maintenance activities should take
the system will naturally decrease as more and more solids
place during the year. During the minor maintenance activities
are trapped. Eventually the flow through a system will be
(routine inspection, debris removal), the type of major
low enough to require replacement of the cartridges. Sediment
maintenance required is determined and, if required for
should be removed from upstream trapping devices on an
disposal, samples of the sediments and media are obtained.
as-needed basis to prevent material from being re-suspended
The next scheduled date is to perform major maintenance and discharged to the system.
activities (replacement of the filter cartridges and associated
Site conditions greatly influence maintenance requirements.
sediment removal). In addition to the scheduled activities, it
StormFilter units located in areas with erosion or active
is important to check the condition of the filter after major
construction should be inspected and maintained more
storms to check for damage caused by high flows and to
often than those in fully established areas. The maintenance
check for high sediment accumulation, which may be caused
frequency may be adjusted as additional monitoring
by localised erosion in the drainage area. It may be necessary
information becomes available during the inspection program.
to adjust maintenance activity scheduling depending on the
Areas that develop known problems should be inspected
actual operating conditions encountered by the system.
more frequently than areas that demonstrate no problems,
particularly after large storms. Ultimately, inspection and
maintenance activities should be scheduled based on the
historic records and characteristics of an individual filter.
2.3 Maintenance crew requirements
Table 2 lists the anticipated crew requirements for applicable occupational health and safety (OH&S) and disposal
maintenance operations. Removal of water and sediments regulations should be followed. A general description of the
during major maintenance activities can be accomplished maintenance activities follows.
using either a pump and water truck or a vacuum truck. All
Table 2 Anticipated Crew Requirements
Inspection/Minor Major Maintenance: Major Maintenance:
Maintenance Sediment Removal Cartridge Replacement
Labourer 1 1
Skilled Worker 1 1 1
Vacuum/Water Truck Operator 1 0/1
Total 2* 2* 2/3*
Special Requirements Knowledge of Proper Knowledge of Knowledge of Cartridge Removal
StormFilter Function Disposal Requirements and Installation Procedures
* May require OH&S trained person if/when vault entry occurs.
22 Stormwater360 Operations and maintenance
Page 44
2.4 Maintenance methods
2.4.1 Minor maintenance/inspection (twice a year)
Minor maintenance typically will involve the steps below, however if it appears that a spill of some type has occurred, the local hazard
control agency and Stormwater360 should be notified immediately.
Steps for Minor Maintenance/Inspection
1 Maintenance to be performed by a skilled worker familiar 6 Take notes about the external and internal condition. This
with StormFilter units. includes inspecting pit penetrations, walls, lids, ladders
and grates etc.
2 If applicable, set up safety equipment to protect
pedestrians from fall hazards presented by open access 7 Give particular attention to recording the level of
covers. Also set up appropriate safety equipment for sediment build-up on the floor of the vault and on top
work near roadways. of the internal components. If flow is occurring, note the
level of water and estimate the flow rate per drainage
3 Inspect the external condition of the unit and take notes
pipe. Record all observations.
concerning defects/problems.
8 Remove large loose debris and litter using a pole with a
4 Open the access covers to the vault and allow the system
grapple or net on the end.
to air out for 5-10 minutes.
9 Close and fasten the access cover, and remove
5 Without entering the vault, inspect the inside of the
safety equipment.
unit, including components.
10 Finally, make notes about the local drainage area relative
to ongoing construction, erosion problems, or high
loadings of other materials to the system.
In the case of a spill, workers should abort
maintenance activities until the proper guidance
has been obtained.
Stormwater360 Operations and maintenance 23
Page 45
2.4.2 Major maintenance inspection 2.4.3 Major maintenance: sediment
(once a year) removal and cartridge replacement
(and emergency)
The primary goal of the major maintenance inspection is
to assess the condition of the cartridges relative to the Major maintenance/filter cartridge replacement typically
level of sediment loading. It may be desirable to conduct involves the steps below. However, if it appears that a spill
this inspection during a storm to observe the relative flow of some type has occurred, the local hazard control agency
through the filter cartridges. If the submerged cartridges and Stormwater360 should be notified immediately. In the
are severely plugged, large amounts of sediments should case of a spill, the worker should abort maintenance
be present and very little flow will be discharging from activities until the proper guidance has been obtained.
the drainage pipes. It is likely that the cartridges need to
Depending on the configuration of the particular system, a
be replaced. Major maintenance inspection will typically
worker may be required to enter the vault to perform some
involve the steps below. However, if it appears that a spill of
tasks. If vault entry is required, OH&S rules for general
some type has occurred, the local hazard control agency
confined space entry must be strictly adhered to. Filter
and Stormwater360 should be notified immediately. In the
cartridge replacement should occur during dry weather
case of a spill, the worker should abort maintenance
and it may be necessary to plug the filter inlet pipe if base
activities until the proper guidance has been obtained.
flows exist. Standing water present in the vault should be
Steps for Pre-Major Maintenance Inspection regarded as polluted and contained during this operation by
temporarily capping the manifold connectors.
1 Maintenance to be performed by a skilled worker
familiar with StormFilter units.
2 If applicable, set up safety equipment to protect
Please note: Confined space entry may be
pedestrians from fall hazards presented by open
required on StormFilter systems. In this case,
doors. Also, set up appropriate safety equipment for
please ensure that appropriate Confined Space
work near roadways.
entry training and subsequent certification has
3 Inspect the external condition of the unit and take been undertaken and is valid, and work
notes concerning defects/problems. procedures are strictly adhered to. If you are
unsure, do not enter the vault and contact
4 Open the access covers to the vault and allow the vault to
Stormwater360 immediately.
air out for 5-10 minutes.
5 Without entering the vault, give the inside of the unit,
including components, a general condition inspection.
6 Take notes about the external and internal condition.
7 Give particular attention to recording the level of
sediment build-up on the floor of the vault, and on top
of the internal components.
8 Remove large loose debris and litter using a pole with a
grapple or net on the end.
9 If the visit is during a storm, make the flow observations
discussed above.
10 Close and fasten the access cover, and remove
safety equipment.
11 Make notes about the local drainage area relative to
ongoing construction, erosion problems, or high loading
of other materials to the system.
12 Review the condition reports from the previous
minor and major maintenance visits and schedule for
cartridge replacement if needed.
24 Stormwater360 Operations and maintenance
Page 46
Steps For Cartridge Replacement Maintenance
1 Depending on the particular unit, one or two utility 14 Using the appropriate lifting cap, attach the cable and
workers and a hauling truck operator will deliver remove the cartridge (up to 10kgs. each) from the
the replacement cartridges to the site. Information vault. It is strictly prohibited to have personnel standing
concerning how to obtain the replacement cartridges is under suspended cartridges. Care must also be used
available from Stormwater360. to avoid damaging the cartridges during removal
and installation. The cost of repairing components
2 If applicable, set up safety equipment to protect
damaged during maintenance will be the responsibility
pedestrians from fall hazards presented by open
of the owner unless Stormwater360 is performing
doors. Also, set up appropriate safety equipment for
maintenance activities and damage is not related to
work near roadways.
discharges to the system.
3 Inspect the external condition of the unit and take
15 Set the used cartridge aside or load onto the
notes concerning defects/problems.
hauling truck.
4 Open the doors to the vault and allow the system to air
16 Repeat steps 14 to 15 until all cartridges have
out for 5-10 minutes.
been removed.
5 Without entering the vault, give the inside of the unit,
17 Remove deposited sediment from the floor of the vault.
including components, a general condition inspection.
This can be accomplished by using the vacuum truck
6 Make notes about the external and internal condition.
18 Once the sediments are removed, it is necessary
7 Give particular attention to recording the level of to assess the condition of the vault, particularly
sediment build-up on the floor of the vault and on top the manifold and the connectors. These are short
of the internal components. sections of 2-inch schedule 50 PVC, or threaded
Ensuring safe working procedures are met, off load the schedule 80 PVC that should protrude above the floor
8
replacement cartridges (16-39kgs each) and set aside. of the vault. If required, apply a light coating of FDA
approved silicon grease to the outside of the exposed
9 Remove the top cap (threaded), upper seal and portion of the connectors. This ensures a watertight
float from the cartridge. Repeat procedure for every connection between the cartridge and the drainage
cartridge within StormFilter vault. Place items in a large pipe. Replace any damaged connectors.
plastic container to be lifted form the vault.
19 Using the boom, crane, or tripod, lower and install
10 Using a cordless drill and 8mm hex head, remove the new cartridges (typically 30kg for standard
the three screws located around the top perimeter of 460 cartridges). Once again, take care not to
the cartridge hood. Place screws in the large plastic damage connectors.
container and, once full or completed, remove plastic
container from vault. 20 Close and fasten the access cover, and remove
safety equipment.
11 Move the vacuum truck near the StormFilter vault
on the down-wind side. Be sure that the truck is not 21 Make notes about the local drainage area relative
too close to the vault so that fumes will not enter the to ongoing construction, erosion problems, or high
vault. Make sure that the last 500mm of the nozzle is loadings of other materials to the system.
approximately 100-125mm in outside diameter. 22 Finally, dispose of the residual materials in accordance
Feed vacuum nozzle into cartridge bay and start with applicable regulations. Make arrangements to
12
vacuum truck. Remove cartridge hood and place return the used cartridges to Stormwater360.
nozzle directly onto filter media. Completely remove
media from each cartridge and repeat process for
every cartridge in vault.
13 Once completed disconnect cartridges from vault floor
and place hood back on cartridges
Stormwater360 Operations and maintenance 25
Page 47
2.4.4 Related maintenance activities (performed on an as-needed basis)
StormFilter units are often just one of many components in components be properly maintained. The maintenance/
a more comprehensive stormwater drainage and treatment repair of upstream facilities should be carried out prior to
system. The entire system may include catch basins, detention StormFilter maintenance activities. In addition to considering
vaults, sedimentation vaults and manholes, detention/ upstream facilities, it is also important to correct any problems
retention ponds, swales, artificial wetlands, and other identified in the drainage area. Drainage area concerns may
miscellaneous components. In order for maintenance of the include: erosion problems, heavy oil and grease loading, and
StormFilter to be successful, it is imperative that all other discharges of inappropriate materials.
2.5 Typical equipment required for maintenance activities
Typical equipment required for conducting maintenance is with available labour and equipment resources may desire
shown in Table 3. Some of the materials listed are suggestions to use alternative methods. However, it is advisable that
rather than requirements. It should be noted that there guidance from Stormwater360 be obtained prior to using
is more than one way to accomplish some tasks. Owners alternative techniques.
Table 3 Maintenance Equipment Requirements
Maintenance equipment required
Minor maintenance Pre-major maintenance inspection Major maintenance cartridge replacement
• Safety equipment*: First aid, • Safety equipment*: First aid, • Safety equipment*: First aid, cones, barricades,
cones, barricades, flagging, cones, barricades, flagging, flares, flagging, flares, tape, vests, hard hats
flares, tape, vests, hard hats tape, vests, hard hats • Work clothes: Rubber boots, overalls, and gloves
• Work clothes: Rubber • Work clothes: Rubber boots, • Door bolt, wrench, Pentasocket and
boots, overalls, and gloves overalls, and gloves miscellaneous Tools
• Door bolt, wrench, • Door bolt, wrench, proprietary • Tape measure
proprietary lifters (e.g. Gatic) lifters (e.g. Gatic) and
• Flashlight
and miscellaneous Tools miscellaneous Tools
• Grapple or net pole
• Tape measure • Tape measure
• Record keeping forms
• Flashlight • Flashlight
• Vacuum truck
• Grapple or net pole • Grapple or net pole
• Replacement cartridges
• Record keeping forms • Record keeping forms
• Cartridge hauling truck
• Litter/debris container • Litter/debris container
• Crane, tripod and hoist, or other lifting device
(150kg minimum capacity)
• Shovels
• Extra 50mm PVC cartridge connectors
• Spare flow restrictor discs
• Litter/debris container
• Vault inlet pipe plug
• Dolly
• PVC Pipe cutter
• Ladder
• Cartridge installation and removal sling
*Confined space equipment may be required for vault entry. This equipment must be used by personnel with the appropriate OH&S training. This equipment typically
includes: Atmospheric testing devices, atmospheric purging and ventilating devices, and entry, exit, and rescue assisting devices.
26 Stormwater360 Operations and maintenance
Page 48
2.6 Material Disposal
The accumulated sediment found in stormwater treatment
and conveyance systems must be handled and disposed of
in a manner that will not allow the material to affect surface
or ground water. It is possible for sediments to contain
measurable concentrations of heavy metals and organic
chemicals (such as pesticides and petroleum products). Areas
with the greatest potential for high pollutant loading include
industrial areas and heavily travelled roads. Sediments and
water must be disposed of in accordance with all applicable
waste disposal regulations.
It is not appropriate to discharge these materials back to
the stormwater drainage system. Part of arranging for
maintenance to occur should include coordination of disposal
of solids (landfill coordination) and liquids (municipal vacuum
truck decant facility, local wastewater treatment plant,
on-site treatment and discharge). Owners should contact
the local public works department and inquire about how
the department disposes of their street waste residuals.
Stormwater360 will determine disposal methods or reuse of
the media contained in the cartridges. If the material has been
contaminated with any unusual substance, the cost of special
handling and disposal will be the responsibility of the owner.
Stormwater360 Operations and maintenance 27
Page 49
A U S T R A L I A SFEP StormFilter & Enviropod Maintenance Data Sheet Date: Location: GPS COORD: System size: Type: Cast-in-place Precast Linear Number of Cartridges: Type of Cartridge: 460mm 690mm 310mm Filter Media: ZPG Perlite Type of EnviroPods: Number of EnviroPods: Personnel: STORMFILTER SYSTEM OBSERVATIONS Last service: Sediment Depth on Vault Floor: Structural Damage: Cartridges submerged: Yes No How deep: Comments: ENVIROPOD SYSTEM OBSERVATIONS Last service: Amount of Sediment in Basket: Structural Damage: Comments: DRAINAGE AREA REPORT Excessive Oil and Grease Loading Yes No Source: Sediment Accumulation on Pavement Yes No Source: Erosion of Landscaped Areas Yes No Source: Comments: STORMFILTER CARTRIDGE MAINTENANCE ACTIVITIES Remove Litter and Debris Yes No Details: Sediment Removed from Vault Floor Yes No Details: Quantity of Sediment Removed (estimate?): Replace Cartridges Yes No Details: Minor Structural Repairs Yes No Details: Residuals (debris, sediment) Disposal Methods: Notes/Problems: ENVIROPOD MAINTENANCE ACTIVITIES Number of Bags Replaced: Clogged EnviroPods/Bags: Yes No Comments:
Page 50
A U S T R A L I A SFEP Treatment Train Inspection Data Sheet It may be desirable to conduct this inspection during a storm to observe the relative flow through the filter cartridges. If the sub- merged cartridges are severely plugged, large amounts of sediments should be present, very little flow will be discharging from the drainage pipes, and it is likely that the cartridges need to be replaced during major maintenance. Date: Location: GPS COORD: System size: Type: Cast-in-place Precast Linear Number of Cartridges: Type of Cartridge: 460mm 690mm 310mm Filter Media: ZPG Perlite Type of EnviroPods: Number of EnviroPods: Personnel Attending Inspection: STORMFILTER SYSTEM OBSERVATIONS Last service: Sediment Depth on Vault Floor: Structural Damage: Cartridges submerged: Yes No How deep: Comments: ENVIROPOD SYSTEM OBSERVATIONS Last service: Amount of Sediment in Basket: Structural Damage: Comments: DRAINAGE AREA REPORT Excessive Oil and Grease Loading Yes No Source: Sediment Accumulation on Pavement Yes No Source: Erosion of Landscaped Areas Yes No Source: Comments:
Page 51
Next steps Learn more For more detailed technical information about Stormwater360 products and solutions, visit www.stormwater360.com.au Connect with us With more than 12 years experience in developing, installing and maintaining innovative and efficient site-specific stormwater management solutions, Stormwater360’s highly qualified engineers and consultants can assist you with every aspect of your stormwater project. Whether it’s an initial in-house technical presentation, a request to inspect and clean your existing facility, or assistance with designing a specific stormwater management solution for your site, simply complete the enquiry form at stormwater360.com.au or call 1300 354 722 to speak to a Stormwater360 consultant. Start a project If you are ready to begin a project, our engineering team will provide you with everything you need, from a free preliminary design to MUSIC modelling, CAD drawings to maintenance frequency and associated costs schedules. To find out more, simply visit www.stormwater360.com.au/custom-solutions and complete the Design Information Request form.
Page 52
©2013 Stormwater360 Australia Nothing in this catalogue should be construed as an expressed warranty or an implied warranty of merchantability or fitness for any particular purpose. See the Stormwater360 Australia standard quotation or acknowledgement for applicable warranties and other terms and conditions of sale. The product(s) described may be protected by one or more of the following US, Australian and New Zealand patents: 5,322,629; 5,624,576; 5,707,527; 5,759,415; 5,788,848; 5,985,157; 6,027,639; 6,350,374; 6,406,218; 6,641,720; 6,511,595; 6,649,048; 6,991,114; 6,998,038; 7,186,058; 705,778; 711,957; 326,257; 332,517; 780521; 336761; 299114 or other patents pending. Stormwater Management StormFilter is a licensed trademark of Stormwater360 Australia.
Page 53
Stormwater360 supplies and maintains a complete range of filtration, hydrodynamic separation, screening and oil/water separation technologies. Call 1300 354 722 www.stormwater360.com.au
Page 54
Next generation stormwater management
Affordable. Effective. Environmental
Stormwater360
A U S T R A L I A
Page 55
www.stormwater360.com.au
Page 56
We are dedicated to investment in
on-going research and development,
and through undergoing rigorous
independent scientific research and
testing, our products have proven their
efficiency and performance in the field.
Stormwater360
Specialists in managing, treating and storing stormwater.
Stormwater360 is a leader in developing innovative and efficient
site-specific solutions that manage the impact of stormwater runoff
on the built environment, and prevent contaminants in the runoff from
entering aquatic ecosystems.
Whether the primary focus of your site is flood mitigation, water
quality or stormwater harvesting, we have the expertise and products
to develop the right water sensitive urban design (WSUD) solution to
achieve your runoff objectives.
Just as importantly, with stormwater regulations and water quality
standards becoming increasingly complex and onerous, our best
management practice filtration, screening and treatment systems
meet the most stringent regulatory requirements.
Page 57
The Stormwater360 Facilities
Ecologically sustainable Management Plan
stormwater management Managing the cost as well as the solution
Regardless of compliance measures, astute developers It is clear that across Australia, government bodies are
and investors recognise that there is an increasing increasing their regulatory involvement in stormwater
demand from business, consumers and the community management and implementing stringent best practice
for projects that incorporate high environmental guidelines. Even where regulations have not yet been
sustainability standards and are fiscally responsible. mandated, there is a strong economic argument for
implementing BPM stormwater management systems at
This is even more critical in urbanised areas, where the development stage, rather than meeting the higher
stormwater water run-off contaminated by pollution, costs associated with a future retrofit.
heavy metals, total nutrients, hydrocarbons and
sediment, can affect the health of groundwater as To assist developers better manage the costs associated
well as the ecology of streams, ponds, lakes and with compliance, Stormwater360 has developed
harbours. In such regions, the environmental stormwater a Facilities Management Plan for installation of the
management solutions developed by Stormwater360 StormFilter™ / EnviroPod™ (SFEP) Treatment Train. This
are not simply a ‘nice-to-have’, but define an plan enables you to amortise the cost of your stormwater
aspirational benchmark for all organisations that management system over a fixed period, so you can
recognise their corporate and social responsibilities. achieve your water quality objectives without incurring
upfront capital costs.
By viewing stormwater as an asset and a resource, and
then managing it in an ecologically sustainable manner, The Facilities Management Plan also incorporates an
we are helping to conserve one of the planet’s most on-going maintenance agreement, providing you with
precious resources – a resource that’s inextricably linked budgeting certainty for the functional operation of your
to our ability to sustain future populations. Similarly, stormwater system for the life of the agreement. In
by maintaining the health of the world’s oceans and addition, as inefficient maintenance is often the reason
waterways, we are preventing the disruption of the for system failure, such as flooding or the inadvertent
food chain’s biodiversity and ensuring that tomorrow’s release of pollutants into waterways, this comprehensive
children can enjoy simple pleasures such as swimming maintenance service also helps minimise the risk of
in clean seas. future inconvenience and disruption to site users (such
as tenants), as well as mitigate the risk of penalties for
regulatory breaches.
Page 58
By viewing stormwater as an
asset and a resource, and then
managing it in an ecologically
sustainable manner, we are
helping to conserve one of the
planet’s most precious resources.
A comprehensive stormwater • Guaranteed maintenance
management package • No replacement or reinstatement costs
• A warranty on all parts, including EnviroPod bags and
In total, the Stormwater360 SFEP Treatment Train StormFilter cartridges, for the term of the agreement
Facilities Management Plan provides you with: • A single point of contact for design, supply
• Supply of all StormFilter units required by your site and maintenance.
• Supply of EnviroPod gully pit baskets From every perspective, the Stormwater360 Facilities
• 12 monthly service of StormFilter units Management Plan provides a smart and sustainable way
to achieve your stormwater treatment objectives.
• 3-6 month service of EnviroPods
• Disposal of contaminants
• Yearly compliance certificate An integrated end-to-end solution
• Warranty on all parts.
From design through to supply,
The benefits of the Facilities Management Plan are manufacture and maintenance
extensive and include:
As a dedicated stormwater management specialist,
• No capital cost
Stormwater360 offers a complete turnkey solution that
• Enhanced cash flow and greater budgeting certainty includes all the resources required to take any project
• 100% tax deductibility (as an operating expense and from the conceptual design through to construction.
off balance sheet) Plus, with either a Maintenance Agreement, or as part
• No additional unexpected costs relating of our Facilities Management Plan, we ensure that your
to maintenance stormwater devices and systems continue to provide
• Clarity of actual costs when attributing outgoings for optimal performance throughout their entire lifecycle.
multiple dwelling developments
• Flexible payment and contract terms
• Guaranteed compliance with legislated water
quality objectives
Page 59
A comprehensive project
planning and design service
The importance and value
The Stormwater360 solution includes a design and
of on-going maintenance
planning service, whereby our engineering division works
Wherever possible, Stormwater360 selects easy-to- with developers, contractors and jurisdictional authorities
access treatment systems that have been designed to select a runoff solution that will meet the climate and
for minimal maintenance. However, regular cleaning geographic challenges of the site, as well as any relevant
and device maintenance are nevertheless necessary to regulatory requirements. Whatever methodology is
remove pollutants and ensure the proper performance of chosen, we will provide you with everything to get the
your stormwater management system. project started. This includes MUSIC (Model for Urban
Stormwater Improvement Conceptualisation) modelling,
Regular maintenance schedules minimise system failure CAD drawings and product specifications together with
and prevent unnecessary damage (and the associated maintenance schedules and associated cost schedules.
costs) to other infrastructure or drainage assets. It
also ensures compliance with corporate environmental Once the system has been agreed on, we work together
policy guidelines. with our precast production partner to manage every
aspect of the manufacturing process.
Maintenance is also vital to minimising the development
impact on the surrounding environment. Our end-to-end solution includes full maintenance of
your stormwater treatment devices, such as the removal
of sediment and the rejuvenation of filters. In addition to
ensuring the full functionality of your system, we provide
detailed reports that verify your ongoing compliance with
local authority regulations.
Page 60
To find out more about
Stormwater360’s stormwater
management systems, or for details
about the Facilities Management
Plan, speak to your Stormwater360
consultant or call us on 1300 354 722.
Best management practice systems
Innovative solutions proven through
extensive in-field testing
The Stormwater360 line of stormwater treatment
solutions comprises the most innovative and effective
products available. We are dedicated to investment
in on-going research and development, and through
undergoing rigorous independent scientific research and
testing, our products have proven their efficiency and
performance in the field. Many have achieved hundreds of
standalone Best Management Practice (BMP) approvals
from regulatory agencies around the world.
The Stormwater360 StormFilter™ / EnviroPod™ (SFEP)
Treatment Train is the only proprietary treatment train
in Australia with published independent third party
field verification of performance. While stormwater is
dynamic, and no two sites or storms are the same,
when the StormFilter™ (a siphon actuated cartridge
filtration system) is combined in a treatment train with the
EnviroPod™ gully pit basket, its performance has been
evaluated as achieving reductions of up to 85% TSS (total
suspended solids), 70% TP (total phosphorous) and 45%
TN (total nitrogen).
Across our extensive range, each product we supply and
install meets Australia’s most stringent standards and has
been verified for its effectiveness in real world – not just
laboratory – situations.
Page 61
G ve} mela) Ph. 1300 354 722 FSC Fax. 1300 971 566 www.stormwater360.com.au responsible sources wwwiscog FSEC* CO23428
Page 62
»> ProjexPartners 4 % APPENDIX C Noosa Council River and Storm Tide Flood Mapping
Page 63
NOOSA
T.
SD N . S
NORTH
i ve
r I
!
MM
SHORE R
R
.A No osa
RIVER FLOOD INFORMATION MAP 10-D34 - September 2012
www.sunshinecoast.qld.gov.au/disaster VN
.
Cr
an
A ROAD
HOW TO USE THIS MAP ks k HI E
N O O S A PA R A D E
ee
LT O AC
Cr N TE T ER
R
(1) Identify locations important to RRA CE
ERRA C E GY
MP
IE
M PI E T
W E YB
you such as home, work, and Doonella GY
Noosa Home
GO O D
where your children go to school. Lake
Path: B:\Workflow\Projects\M3633_SCRC_Disaster_Management\R4815_Evacuation_Planning_Analysis\V20110809\Maps\Final Draft MXD's 23 Aug 2012\SCRC_Riverine_Flood_Hazard_Street-Level_PUBLIC_A4L_DDPAtlas_draft_20120828_1613_KelvinM.mxd - Printed on: 28/08/2012, Created by: at005, Date Created: Tuesday, 28 August 2012
NOOSA
(2) If any of these places are in LEISURE Maker Centre
CHA
R O AD
one of the coloured zones, you T E WA N T I N CENTRE G I B S O NNoosa
R O A D Village
P S
may be at risk from river
TR
EE
SA
flooding.
T
Noosa
I N OO
(3) Discuss and develop an
Waters W E Y B A RO A
emergency plan for you and your Canals D
family, and identify potential NOOSA AUSTRALIAN
ND
evacuation routes and high FOOTBALL CLUB
MU
R EE T
ground in your neighbourhood in
EU
R E E F ST
case roads are closed.
LUTHERN
(4) During an event, stay tuned OVALS
to local radio, council's website, N O O S AV I L L E
PARK
W
A
R.
L
S.
facebook and twitter sites for EE
D TE NIE
R CRE
updates and evacuation advice. I
R E
E K ROA
D
V
HA
BC KM N
. R OA
E E N IE C R
Y
D
This area w ill flood first. E UM N D. N O O S A R O A D EE
K R
Wey ba Creek
In a major flood, waters OAD
will be deepest here. E
IV
R H AY D R
This area w ill flood after
the red zone in a
moderate flood. Noosa
This area w ill flood after Civic NOOSA
LTE
the orange zone in a HEADS
major flood.
A
ie C
W
en
r ee
This area m ay flood in E k
an extreme flood event
but water will be Lake
shallow er than other Weyba
zones. Disclaimer
This map has been produced in response to the recom mendations of the Qld Floods Commission of Inquiry to prom ote While every care is taken to ensure the accuracy of this product, neither the Sunshine Coast Council nor the
awareness of potential flood prone areas. The inform ation is of a general nature and is not intended to replace the State of Q ueensland m akes any representations or warranties about its accuracy, liability, completeness or
need for site specific enquiry of Council records or to be a substitute for more formal flooding investigation required in
0 125 250 500 suitability for any particular purpose and disclaim s all responsibility and all liability (including without lim itation,
any developm ent approval or perm it process. The information presented on this map is either model based,
liability in negligence) for losses, damages (including indirect or consequential damage) and costs that may
Major Roads Metres
derived from historic flood data, or estim ated using the best judgem ent of a professional hydrologist. The m ap
is not accurate to the scale of a specific property and for som e areas flood information is not available. occur as a result of the product being inaccurate or incomplete in any way or for any reason.
Page 64
T.
SD N . S
DO NLL
. STR E
ET NOOSA
NORTH
I
!
M
M
R
. A
S T O R M T ID E IN F O R M AT IO N M A P 1 0 -D 3 4 - S e p te m b e r 2 0 1 2
w w w. noosa.qld.gov.au VN SHORE
.
H O W T O U S E T H IS M A P Cr k N o osa River RA
CE
N O O S A PA R A D E
an ee R
D
HI TE
ks C
A ROA
IE
r
LT O N MP
GY
(1) Identify locations im portant to TERRA
CE
you such as hom e, w ork, and
WEYB
G YM PIE TE R R AC
E
Noosa Hom e
GOODC
w here your childre n g o to school.
NOO SA
Pa th : B: \W o rk flo w \P roje c ts \M 3 63 3_ S C RC _D isa s te r_M a n ag em e nt \R 48 15 _ E v ac u at io n_ P lan nin g_ A na ly s is \V 2 0 11 0 80 9\ M ap s \F ina l D raft M X D's 2 3 A ug 2 01 2 \S CR C _S to rm T id e _F lo od _H a z ard _S t ree t-L ev e l_ P UB L IC _A 4 L _D DPA t la s _d ra ft_ 20 1 20 82 8 _1 60 4 _K e lv in M .m x d - P rin te d on : 29 /0 8/ 20 12 , Cre at ed b y : a t0 05 , Da te C rea te d: W ed n es d ay, 2 9 A ug u s t 2 01 2
(2) If any of these places are in LEISU RE Maker C entre
R OAD
T E W A N T IN
HAP
one of the coloured zone s, you CENTRE G IB S Noosa Village
ON R
m ay be at risk from storm tide
S TR
OAD
flooding.
EE
Doonella
N O OS A
T
(3) D iscuss and develop an Lake
WE
em ergency plan for you and your YBA ROAD
fam ily, and identify potential NOO SA AU STRALIA N
I
ND
evacuatio n routes and h igh Noosa FO OTBALL CLU B
T R EE T
MU
ground in your neighbourhood in Waters
EU
Canals
case ro ads a re closed.
REEF S
LUTHERN
(4) D uring an event, stay tuned OVALS
to local radio, council's w ebsite, PAR K
R.
S.
facebook and tw itter sites for
updates and evacuation ad vice.
T h is a re a w ill flo o d w h e n B CK MN
. ROA
D E ENIE C
th e B u re a u o f M e te o ro lo g y RE
EK
ROAD
(B O M ) p re d icts a sto rm tid e
o f 1 m e tre a b o v e H AT.* VE
I
R H AY D R
T h is a re a w ill flo o d a fte r
th e re d zo n e w h e n th e N O O S AV IL L E
NOOSA
W ey
B u re a u o f M e te o ro lo g y Noosa
(B O M ) p re d icts a sto rm tid e Civic HEADS
ba
LTE
o f 1 -2 m e tre s a b o ve H AT.
C re
ek
T h is a re a w ill flo o d a fte r
A
en ie
W
E
th e o ra n g e z o n e w h e n th e Cr e
ek
B u re a u o f M e te o ro lo g y Lake
We yba
(B O M ) p re d icts a sto rm tid e
o f 2 -3 m e tre s a b o ve H AT.
Disclaim er
M a jo r R o a d s T h is m a p h a s b e e n p ro d u ce d in re sp o n s e to th e re c o m m e n d a tio n s o f th e Q ld F lo o d s C o m m iss io n o f In q u iry to p ro m o te
a w a re n e ss o f p o te n tia l flo o d p ro n e a re a s . T h e in fo rm a tio n is o f a g e n e ra l n a tu re a n d is n o t in te n d e d to re p la ce th e
W h ile e v e ry ca re is ta ke n to e n su re th e a cc u ra cy o f th is p ro d u ct, n e ith e r th e S u n sh in e C o a st C o u n cil n o r th e
S ta te o f Q u e e n s la n d m a k e s a n y re p re se n ta tio n s o r w a rra n tie s a b o u t its a c cu ra cy , lia b ility , co m p le te n e ss o r
n e e d fo r s ite s p e c ific e n q u iry o f C o u n cil re co rd s o r to b e a s u b stitu te fo r m o re fo rm a l flo o d in g in ve stig a tio n re q u ire d in su ita b ility fo r a n y p a rticu la r p u rp o se a n d d is cla im s a ll re s p o n sib ility a n d a ll lia b ility (in clu d in g w ith o u t lim ita tio n ,
0 12 5 25 0 50 0 a n y d e v e lo p m e n t a p p ro v a l o r p e rm it p ro c e s s. T h e in fo rm a tio n p re se n te d o n th is m a p is e ith e r m o d e l b a se d ,
* HAT- H ig h est A stro no m ica l Tide M e tre s
d e riv e d fro m h isto ric flo o d d a ta , o r e s tim a te d u sin g th e b e s t ju d g e m e n t o f a p ro fe s sio n a l h yd ro lo g is t. T h e m a p
is n o t a cc u ra te to th e sca le o f a sp e cific p ro p e rty a n d fo r so m e a re a s flo o d in fo rm a tio n is n o t a v a ila b le .
lia b ility in n e g lig e n c e ) fo r lo ss e s , d a m a g e s (in clu d in g in d ire ct o r c o n s e q u e n tia l d a m a g e ) a n d c o s ts th a t m a y
o c cu r a s a re s u lt o f th e p ro d u c t b e in g in a ccu ra te o r in co m p le te in a n y w a y o r fo r a n y re a s o n .
le ve ls a re sim ilar to K in g Tid e le ve ls.
Page 65
»> ProjexPartners 4 % APPENDIX D Development Site Catchment Area Plan
Page 66
DRAINAGE CATCHMENT LEGEND
255.5 New Contours
New Drainage Pipe
Catchment Areas
Gully Pit, Field Inlet,
Manhole, Headwall
New Pit No./Line No.
Existing Stormwater Pipe
BUNNINGS WAREHOUSE
255.5 Existing Contours
SHOPPING PRECINCT
NEW R CATCHMENT AREA TABLE
OAD
VE
18.0 CATCHMENT AREA
17
DRI
.5
C1 0.0101 Ha
17
.0
C2 0.0097 Ha
WAY
.5
1818.5 C3 0.0084 Ha
C4 0.0561 Ha
18.5 54.
E
9
C5 0.0386 Ha
GAT
C3
C2
C1 50
.0
17.0
19
45.0
.0
40.0
35.0
17
30.0
25.0
.5
19.0
0.0
20.0
5.0
15.0
10.0
18
18
0 .
.5
19.5
C4
C5
20.0
19.5
W:\205 Mogprop Management\205 002 MCU Gateway Dve Noosaville\Drawings\205-002-WORKING.dwg
20.0
19.5
D
SA ROA
DI NOO
EUMUN
CATCHMENT AREAS
SCALE 1:1000 (A3) PRELIMINARY ISSUE
CLIENT APPROVED SCALE
LOT 102 SP241371 GATEWAY DRIVE, NOOSAVILLE
MOGPROP 1:250 0 5 10 15 A1
PROJECT MANAGEMENT - ENGINEERING - PLANNING
MANAGEMENT PTY LTD 1:500 A3 DRAINAGE CATCHMENT PLAN
SUNSHINE COAST MACKAY CAIRNS RPEQ
(07) 5493 3649 (07) 4957 4988 (07) 4041 5118 1 PRELIMINARY ISSUE 07/08/14 RH KP JB ---- DRAWING NUMBER REVISION
projexpartners.com.au No. Description Date Drawn Design Check RPEQ 205-002-C13.01 1
THIS DRAWING MAY ONLY BE USED FOR THE PURPOSE FOR WHICH IT WAS PREPARED BY PARTIES AGREED TO BY PROJEX PARTNERS & MUST NOT BE USED BY ANYONE ELSE OR FOR ANY OTHER PURPOSE
Page 67
»> ProjexPartners 4 % APPENDIX E PCarain Analysis Results
Page 68
N1
5/1
4/1
3/1
2/1
1/1
1/2
2/1
STRUCTURE
Enviropod or approved equivalent
Enviropod or approved equivalent
Enviropod or approved equivalent
Enviropod or approved equivalent
Enviropod or approved equivalent
Enviropod or approved equivalent
NAME
New 2440 dia. Stormwater 360
900x600 Field Inlet with
900x600 Field Inlet with
900x600 Field Inlet with
900x600 Field Inlet with
900x600 Field Inlet with
900x600 Field Inlet with
Existing Gully Pit
STRUCTURE
Manhole Filter
DISCRIPTION
PIPE SIZEmm (Class) 225(2) 225(2) 225(2) 225(2) 225(2) 225(2)
PIPE GRADE % 3.10% 3.91% 1.12% 2.00% 9.80% 2.79%
32.27 25.56 89.28 50.00 10.21 35.82
PIPE SLOPE 1 in X
FULL PIPE FLOW VELOCITY (m/s) 0.80 0.92 1.01 1.89 1.89 0.80
1.89 2.14 3.62
PART FULL FLOW VELOCITY (m/s)
DATUM RL 7.0
18.486
18.098
17.870
17.746
16.988
15.850
18.004
17.746
WATER LEVEL
IN STRUCTURE
18.486
18.254
18.091
18.014
17.870
17.837
17.740
17.409
16.988
16.424
15.850
18.004
17.799
17.740
17.409
HYDRAULIC
GRADE LEVEL
W:\205 Mogprop Management\205 002 MCU Gateway Dve Noosaville\Drawings\205-002-WORKING.dwg
PIPE FLOW
0.033 0.038 0.041 0.078 0.078 0.033
(Cumecs)
PIPE CAPACITY 0.083 0.093 0.050 0.066 0.147 0.079
AT GRADE (Cumecs)
1.295
1.195
1.215
1.295
1.315
1.395
1.495
1.475
2.405
1.000
1.874
1.495
DEPTH TO INVERT
18.025
17.805
17.785
17.425
17.405
17.265
17.165
17.125
16.195
15.000
17.500
17.165
INVERT LEVEL
OF DRAIN
19.320
19.000
18.720
18.660
18.600
16.000
19.374
18.660
DESIGN SURFACE
LEVEL
REACH LENGTH 7.100m 9.200m 12.500m 2.000m 12.200m 12.000m
LINE 1 2
PRELIMINARY ISSUE
CLIENT APPROVED SCALE
1:1000 0 10 20 30 40 50 60 A1
LOT 102 SP241371 GATEWAY DRIVE, NOOSAVILLE
MOGPROP 1:2000
HORIZONTAL
A3
PROJECT MANAGEMENT - ENGINEERING - PLANNING
MANAGEMENT PTY LTD 1:100 0 1 2 4 6 A1
DRAINAGE LONGITUDINAL SECTION
SUNSHINE COAST MACKAY CAIRNS RPEQ
(07) 5493 3649 (07) 4957 4988 (07) 4041 5118 1:200 A3
1 PRELIMINARY ISSUE 07/08/14 RH KP JB ---- VERTICAL DRAWING NUMBER REVISION
projexpartners.com.au No. Description Date Drawn Design Check RPEQ 205-002-C11.01 1
THIS DRAWING MAY ONLY BE USED FOR THE PURPOSE FOR WHICH IT WAS PREPARED BY PARTIES AGREED TO BY PROJEX PARTNERS & MUST NOT BE USED BY ANYONE ELSE OR FOR ANY OTHER PURPOSE
The text continues on page 69.