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12. APP G. Stormwater Management Plan
Attached to the e-mail MCU14/0102 Development application Part 3 of 4 App G Stormwater Management Plan.
Original PDF page 17, section 1. The text section number identifies this passage in the reader.
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Log in to see the plans as drawn STORMWATER QUALITY
EXISTING WATER QUALITY
No stormwater quality control measures have been incorporated into the existing site drainage
infrastructure.
WATER QUALITY ENVIRONMENTAL VALUES
AND WATER QUALITY OBJECTIVES (WQO)
The subject site is located within the region of South East Queensland and as such the
Department of Environment and Heritage Protection has specified Environmental Values and
Water Quality Objectives for the management of stormwater quality in this region under
Schedule 1 of the Environmental Protection (Water) Policy 2009. This document stipulates that
stormwater design objectives for industrial developments are to be as per the ‘Urban
Stormwater Quality Planning Guidelines 2010.’ This document provides specified design
objectives for both the construction and operational phases of the development in accordance
with landscape features and the regional location of the proposed development.
As per the ‘Urban Stormwater Quality Planning Guidelines 2010’, the identified Water Quality
Objectives for South East Queensland are defined as:
Table 6.1: Design Objectives for Management of Stormwater Quality in South East Queensland
– Operational (Post-Construction) Phase of Development
Pollutant Minimum reductions in mean annual loads from
unmitigated development (%)
Total Suspended Solids (TSS) 80
Total Phosphorus (TP) 60
Total Nitrogen (TN) 45
Gross Pollutants > 5mm 90
PROPOSED STORMWATER IMPROVEMENT
DEVICES
Water Sensitive Urban Design (WSUD) aims to minimise the impact of a development on the
natural water cycle by reducing the export of pollutants, sediments and nutrients from the site
into the natural watercourse. In order to treat the stormwater runoff from the site, various
treatment devices can be used throughout the development area and these concepts can be
integrated into the overall design of the road layouts, road cross sections, stormwater layouts
and water supply reticulation systems. Stormwater from the development will follow a specially
designed stormwater quality treatment train prior to discharge from the site, which will ensure
compliance with the water quality objectives.
Stormwater Management Plans
Page 10 Hyder Consulting Pty Ltd-ABN 76 104 485 289
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