01072015144724 · MCU10/2065

MCU10/2065

Roof Water & Stormwater Drainage

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The design of the internal stormwater drainage system must be in accordance with
Council’s Planning Scheme Policy 5 ~ Engirieering Design Standards — Roads,
Drainage and Earthworks and be sufficient to ensure that stormwater runoff from the
driveway and vehicle manoéuvring area does not adversely affect the proposed units
or any adjoining property.

Roof runoff from any new dwelling must be directed to a a rainwater storage system or
tank that is installed to ensure water from the rainwater storage system or tank is used
for external uses (such as watering gardens, irrigation, ornamental ponds, water
features, topping-up swimming pools, outdoor cleaning, etc) and for internal (ground
floor) use in washing machine cold taps and toilet cisterns. All rainwater tanks are to
be designed and installed in accordance with the Queensland Development Code
(QDC).current at the time of building approval, and must be part of the plumbing
application for approval. The location and capacity of the tanks must be clearly shown
on the plans submitted for Building Works and Operational Works approval and any
overflow must be directed to the stormwater drainage system.

All stormwater drainage (including roof water overflow from the rainwater storage
system) must be collected and discharged so there is no net increase in stormwater
runoff from the site. Stormwater drainage permitted to drain from the site must be
discharged to Council's existing drainage system.

To ensure that polluted run-off does not enter Council's stormwater drainage system,

stormwater run-off from the carparking areas and the driveways must have the first:

flush (the first 12 mm of rainfall or hose-down) collected in a grease/oil arrestor/gross
pollutant trap provided. on site prior to being permitted to discharge into Council’s
drainage system.

Alt other clean stormwater, such as roof water, can be collected on site and discharged

through a single underground drain ‘line directly into the existing drainage system,

bypassing the grease/oll arrestor/gross pollutant trap.

To this end, a detailed maintenance plan must be prepared for the proposed grease/oil

__arrestors/gross pollutant trap, which must be submitted to the Council for approval prior

to obtaining a Development Permit for Operational Works. °

The approved maintenance plan must be incorporated in the Community Management
Scheme for.the development and a copy of this must be provided for Council s records
prior to commencement of the approved Use.

A Development Permit for Building Works must not be granted until a Development
Permit for Operational Works has been issued in regard to the drainage scheme.

All site stormwater drainage must be by means oF a gravity system.

Earthworks

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Earthworks required onsite must be carried out in ‘accordance with Council’s Planning
Scheme Policy PSP5 — Engineering Design Standards, so as not to cause the
additional ponding of water on any adjoining lands or the blockage of, or interference
with, any natural watercourses.

Earthworks carried out on site must not affect the structural integrity of any of the
existing fences or structures that border the development site. Fences that are
affected must be replaced prior to the Building Certifier issuing the Certificate of
Classification. In this regard any fences to be replaced must be clearly shown on the
plans submitted for Operational Works approval.

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