Inland Waters
Page 174
catchment area contributing to the scheme is estimated to be approximately 70
ha.
Upon completion and throughout 2001 and 2002 water quality monitoring of the
lake connecting the ASR well indicated turbidity above EPA Water Quality
Criteria levels. One instance of a commonly used domestic garden herbicide
(simazine) detection occurred, although this was only slightly in exceedence of
EPA Water Quality Criteria levels. By 2003, a significant improvement in the
quality of the lake occurred and, when the water quality parameters were within
recommended limits, injection to the aquifer could take place. During this
period 32 ML of lake water was injected, however no recovery of this water
occurred during the subsequent summer season.
To discharge water to any underground aquifer, an ASR operating licence is
required from the EPA. To undertake this water discharge operation the EPA
(under the Environment Protection Act 1993) require the monitoring of pH,
turbidity and
E Coli
( bacteria) to meet the below discharge criteria :
Conductivity
< 3300 us/cm
pH
6.5 - 8.5 pH units
Turbidity
<10 NTU
E Coli
0 - 100 E Coli count per 100ml
In 2011, new ASR pump components were installed to complement the existing
pumping infrastructure and to assist in meeting the stringent EPA Licence
criteria for water quality. The additional pumping station components include:
•
pH meter
•
Turbidity meter
•
Media Filtration system
•
UV Filtration system.
The water quality at Northgate Reserve Wetlands will be monitored ongoing by
the City of Port Adelaide Enfield.
Stormwater Management Plans
The City of Port Adelaide Enfield is progressively preparing integrated
Stormwater Management Plans for its major catchments, in association with the
South Australian Stormwater Management Authority and the AMLR NRM
Board. Each Plan will outline the water harvesting and distribution opportunities
in each catchment, the management of any flooding risks in the area, and the
best ways to improve the quality of stormwater that reaches the coast or
waterways.
Stormwater Management Plans are a strategic response to the increasing
implications for stormwater management of increased urban infill, the capacity
constraints of current infrastructure systems, the increased requirements for
environmental values and biodiversity, and the sometimes competing demands
