Development Plan - City of Playford - SA.Gov.au

within Bishopstone Road, Davoren Park;
• the developing suburb of Andrews Farm, the majority of which was developed by the
Hickinbotham Group in the 1990’s. The suburb is essentially residential in nature and is also
serviced by a school and local centre.
Tierra Environment (Tierra) was engaged by the LMC to undertake a Phase 1 and Phase 2
Environmental Site Assessment (ESA) of 240 hectares of land located on both sides of Coventry
Road at Munno Para West. The findings of the Phase 1 and Phase 2 investigations are reproduced
below.
• the site is predominantly covered with stubble from recent slashing of vegetation and areas of
native vegetation, and is sloping slightly towards the western boundary.
• the majority of the site has been owned by the South Australian Government since the mid
1950s.
• a site inspection revealed the following key information:
- There were demolished house sites on the northern end of Coventry Road and the southwestern
corner.
- An artificial drainage line runs on the site along the western and eastern boundaries.
- There is a power sub-station adjacent the site in the south-western corner and a golf
course adjacent the site in the north-western corner.
• the historical aerial photograph review indicated the past land use of the site mostly consisted
of cropping/agriculture. The site contained only minor structures such as residential dwellings
and sheds.
• a Section 7 review did not reveal any additional information to indicate potential sources or risks
of contamination.
• according to available information, the soil and the geology underlying the site consists of
Pleistocene age Hindmarsh Clay.
• regional groundwater flow is expected to be to the west north-west, towards the Gawler River.
The groundwater in the upper most aquifer is expected to be between 22m and 25m below the
surface.
The following scope of investigations was undertaken:
• establishment of 240 grid based sampling locations across the broad acre area.
• establishment of 4 sampling locations in drains and 3 sample locations on each of the two
demolished house sites.
• collection of two samples from each location (one sample from locations in drains), logging of
soil strata, screening of samples for volatile organic carbon (VOC).
• analysis of 55 upper samples and 12 lower samples for pH and Vic EPA Screen and analysis of
20 samples for herbicides and triazines.
• analysis of 10 samples for chromium (VI) and sulphate.
• analysis of 6 samples from each demolished house site for asbestos.
• soil types were found to be relatively consistent.
• all field screening results (PID readings) were less than 10ppm which is considered consistent
with background concentrations.
• all results were less than the limits of reporting or complied with NEPM HIL A and NEPM EIL
criteria.
• groundwater investigations were deemed unnecessary by the Environmental Auditor based on
soil investigation results.
Playford North DPA -9-
Jul 08
Final DPA 20 August 08.doc Version 3