Development Application Part 2 - Environmental & Stormwater Management Plans · OPW11/0335

           Table 11: Location of Water Quality Monitoring at the Essence of Pereqian Site

                Site                     Site No.                                             Description

 Wetland C2                              1               Monitor quality of stormwater entering wetland C2
 Wetland C2                              2               Replicate monitoring of stormwater quality entering wetland C2
 Heath                                   3               Monitor quality of stormwater entering the receiving waters

 Heath                                  4                Replicate monitoring of stormwater quality entering the receiving
                                                         waters
 Construction Site                       5               Monitor rainfall onto construction site

 Inflow onto construction                6               Monitor quality of stormwater entering construction
 site
 Inflow onto construction                7               Monitor quality of stormwater entering construction
 site
 Outflow from construction              8                Monitor quality of stormwater exiting construction sitr-
 site
 Outflow from construction              9                Monitor quality of stormwater exiting construction sits
 site



Water Quality Monitoring During Construction
During construction, monthly monitoring for the parameters described in Table 10 is
recommended from sites 3 and 4 (Table 11).            Additionally, it is recommended that the
suspended solids concentration of stormwater is measured at sites 5 to 9 during stormwater
events, with collection of four (4) stormwater samples flowing onto the construction site, four (4)
more stormwater samples flowing from the construction site into the terminal wetland, and a
rain-gauge is installed on site to indicate the intensity of rainfall during a stormwater event
(Table 11).

Inflow and outflow water needs to be collected as paired samples within a short time frame, with
each pair representing the same phase of stormwater activity. The volume of stormwater
generated in the catchment can be calculated by the area of catchment and the intensity of
rainfall during the event. The proportionate change in the suspended solids loads in stormwater
flowing over the construction site will provide a measure of the sediment being generated from
the construction site.

Herbicide monitoring in stormwater entering and leaving the construction site should be
performed when applications are known to occur, rather than routinely. Some herbicides have
a short residence time, so arrangements may need to be made with the laboratory for rapid
courier service and turnaround time. The monitoring schedule is listed in Table 12

The temporal frequency of stormwater monitoring during the construction phase is listed in
Table 12.

Water Quality Monitoring During Routine Operation of the Essence of Peregian
Sampling should be performed at sites 1 to 4.            The temporal sampling frequency is
recommended at monthly intervals for the first 12 months, with quarterly sampling thereafter
(Table 12). This temporal frequency is intended to show the proportional improvement from the
existing water quality condition in response to improved stormwater management associated
with the new development. Seasonal variations can be identified from the quarterly samples.
Herbicide monitoring is as described for the construction phase.




02011 Simmonds & Bristow Ply Ltd                  Pacific Plumbing - Scanlon Property Group Pty Ltd                      J-1109-155 - 8 September 2011
11CLIENT FILE SlConlrast Consiructions\1109-155c -Essence or Peregran SCEP Stage I Updale109_Outpul O ocumentsU-1109-155c_SMP_Scanlon Property
Group SECP_ge_la_ 110905.doc                                                                                                          Page 15 of 21