132006.268.03 - Original Court Approval - Attachment 1

 

Cooroy Mountain Spring Water CEDA Cooroy Mountain Road, Mt. Cooroy QLO

volume of water required undertaking this
task will be 300L per week or an average of
43L per day. Added to the total above the
total volume of wastewater to be treated
will be 3,367Uday.

Wastewater loadings from the bottling
plant process are dealt with in the
Conceptual Stormwater Assessment report
by Gilbert & Sutherland (2009).

5.3 Licensing requirement

Using the formulae presented in the
Queensland Environmental Protection policy
(Water) 1994 - Environmental Protection
Regulation (2008) Section 63, one Equivalent
Person (EP) generates 200L per day. Thus the
proposed development will require a ~17 EP
wastewater treatment system. As this is less
than the 21 EP threshold the system does
not constitute an Environmentally Relevant
Activity (ERA) 63 licence and does not
require Department of Environment and
Resource Management (DERM) approval.

5.4 Proposed wastewater
treatment system

It is proposed that wastewater generated
on-site will be treated to a secondary
standard within a water treatment plant
(WTP) utilising either of the following
treatment methods:

* activated sludge system

* biological trickling filter system

* extended aeration system

* aerated/aerobic sand filter system

5.5 Proposed method of disposal

It is proposed that the treated effluent
from the bottling facility redevelopment
will be surface irrigated onto a designated
irrigation area.

The surface-spray irrigation system
proposed will allow regular small
applications to be applied to the
nominated irrigation area to maintain
optimal soil moisture levels while
minimising deep percolation and surface
run-off. Additionally, surface spray
applications maximise evaporation further
assisting with wastewater disposal.

All such irrigation would be undertaken in
accordance with the requirements of the

5-2

Queensland Water Recycling Guidelines and

AS/NZS 1547:2000, including the following:

+ The designated land application area must
comply with setback distance
requirements.

+ The presence of buried pipes shall be
indicated by using underground marking
tape to AS/NZS 2648.1 or be indicated by
warning signs at the boundaries of the
designated area, clearly visible to property
users, which would read in English and
any other appropriate community
language: ‘Sewage effluent pipework
installed below. DO NOT DIG’.

+ Warning signs should be erected near the
wastewater treatment system, be clearly
visible and read in English and any other
appropriate community language:
“RECYCLED WATER BEING USED - DO NOT
ORINK’.

+ All recycled water signs should comply
with AS1319-1994 Safety Signs for the
Occupational Environment.

« No run-off or seepage of effluent should
occur beyond the designated irrigation
area.

+ Effluent must not come into contact with
people, domestic or farm animals or any
crops intended for human consumption.

+ The owners of the system must enter into
@ contract with an organization
authorised by Council and/or EPA for the
servicing of the unit on a regular basis.

+ The land application area/s should be
maintained with purposely planted
grass/turf or trees/shrubs to maximise the
nutrient uptake and minimise deep
percolation of nutrients through the soil
profile.

5.6 Proposed irrigation area

In order to estimate an appropriate land
application area for the expected loadings,
the method of catculation for an irrigation
area from AS1547—1994 was used.

The equation for sizing a surface irrigation
area from Section 3.6.2(c) of AS1547—1994
is as follows:

Ai = qw/DIR

Where

Ai = irrigation area required
qw = total quantity of effluent

generated in a week, in litres