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Response to Information Request - Received on 19/04/2012 · OPW11/0335
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, .
11.0 MONITORING AND EVALUATION OF WATER QUALITY AGAINST TARGETS
A draft water quality monitoring program has been developed to measure the performance of
the proposed stormwater treatment. The objective of the monitoring program is to quantitatively
show whether or not the nominated water quality targets are being met.
The key water quality indicators are total suspended solids, total nitrogen, total phosphorus and
pH. Other relevant water quality parameters include microbiological parameters (faecal
coliforms, Escherichia COIl), chemical and physical parameters (dissolved oxygen, turbidity), and
herbicides if they are used within the development site. The following water quality indicators
are recommended (Table 11-1):
. Microbiological: Faecal coliforms, Escherichia coli
.
Physical: Biological Oxygen demand, dissolved oxygen, suspended solids, turbidity,
pH;
. Chemical: Total suspended solids, total nitrogen, total phosphorus; and
. Herbicides: If herbicides are used to control weeds on the development site, then
they should be included in the suite of water quality indicators.
-
.
lent Su rface Wt
Table 111 Summaryof Test M ethods for A m b.
.
aers
,.Sample Preparation
Parameter
Method
Sample Analysis Method
Heated persulphate
Nutrients -
total S~AL AQ2 discrete analyser
digestion- ~
.
E coli Membrane filtration l EC ~roth or EC-MUG medium
iI .
Faecal coliforms Membran~filtration M-FC Agar
...Membrane electrode in Wheaton
BODs Incubation
Bottles
Suspended solids Membrane filtra:tion I Gravimetric
,
J
Dissolved oxygen None ""
Membrane electrode
pH ..-.;t"-f’.:;-_
t
f.’
None
-
Membrane electrod~
, ,-
Turbidity None ~ Photometer
Herbicides Solvent extraction #GC/MS
#GCMS -
Gas Chromotograph/Mass Spectrometer
The existing spatial variation of key water quality indicators in the wetland adjacent to the
Noosa National Park, measured on the 10th July 2009 after a stormwater flow, was used to
identify the replication needed to represent water quality in the heath Wetland System and the
receiving node.
It is recommended that the water quality of the existing heath wetland is represented by 9
sampling points per sampling replicates). This sampling frequency will
event (Le. 9 spatial
accommodate the spatial variation of water quality measurements expected in the heath that
connects with Noosa National Park, and will quantitatively show the difference between the
average measured concentrations compared with the required target or guideline values.
The recommended sample points are indicated in Table 11-2, which lists the location of sample
points during the construction phase and the operational phase.
@2012 Simmonds & Bristow Pty LId Contrast Constructions J-1005-310 _
22 March 2012
1:ICLlENTFILESIContrast Constructionsl1108-155c -
Essence of Peregian SCEP Stage 1 Updatel09_Output DocumentsI1108-155C_SWMP
SCEMP_Scanlon Property Group_V4 O_ta_120321.doc Page 19 of 24
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