PDP was commissioned to undertake an environmental assessment following the discovery of contamination in soils located immediately adjacent to an operating service station. The works were undertaken in a staged manner and involved the installation of groundwater monitoring wells, soil sampling, completion of biannual (now annual) groundwater monitoring events and the completion of soil gas and indoor air sampling.
In total, nine groundwater monitoring wells have been installed within the service station, the neighbouring property and on adjacent public land (e.g. road corridors) with the purpose of delineating the extent of petroleum hydrocarbon contamination. Groundwater monitoring is undertaken to assess the quality of groundwater beneath the site/ surrounds and to determine whether there is a potential risk to human health and the environment in the context of the current (and potentially proposed future land use(s)). Soil-gas and indoor air sampling has been undertaken to assess the potential risk to occupants within selected buildings.
Overall, the monitoring has demonstrated the extent of the plume, and that the concentrations of residual petroleum hydrocarbons in groundwater are stable or decreasing in response to natural attenuation processes. PDP is working with our client to secure a long-term discharge consent for the contamination present in groundwater.
Key Contacts
Hamish Wilson
James Conway
