Legislative Assembly for the ACT: 2014 Week 07 Hansard (Thursday, 7 August 2014) . . Page.. 2254 ..
It is important to reiterate, that due to the complex nature of the ACT’s geology, PSH can reoccur as hydrocarbons “smear” from the surrounding rock and soils back into groundwater as groundwater levels rise and fall.
The Environmental Consultant, in liaison with the Independent Auditor, determines the monitoring requirements in order to demonstrate that PSH has been adequately removed and not reoccurring.
(3) The cost of remediation of groundwater would vary greatly depending on the type and level of impact and the local groundwater environment. Remediation is undertaken by the polluter or owner of the sites. This commercial information is not provided to the Government, however it is understood remedial cost can be in the hundreds of thousands of dollars.
(4) The primary criterion which must be met for all audited sites is that on the basis of the works undertaken the independent accredited Auditor and the EPA is satisfied that the site is suitable, from a contamination perspective, for the proposed development and that any residual contamination does not pose an unacceptable risk to human health and the environment.
Other criteria include the removal of PSH product and compliance with groundwater assessment criteria taken from the nationally approved Assessment of Site Contamination National Environment Protection Measure 1999 as amended in 2013.
It should be noted that clean up levels for hydrocarbon contamination can vary greatly from site to site. The level of remediation required will depend on a number of factors including: the type of development being proposed, for example the requirements for residential are far more stringent than for industrial uses; the type of development (i.e. does it include enclosed basements); the risk the residual contamination poses to the surrounding environment and whether mitigation measures are proposed in building construction to reduce the risk from residual contamination that may be present.
Environment—former petrol station sites
(Question No 304)
Mrs Jones asked the Minister for the Environment and Sustainable Development, upon notice, on 5 June 2014:
(1) What remediation process was used on the former Rivett Petrol Station site.
(2) When did the remediation process begin.
(3) When was remediation of the site completed.
(4) After the auction on 5 June 2014, what is the time frame for the new lessee to have a development application lodged.
(5) What is the standard completion time frame for a development after approval of a development application.
Mr Corbell: The answer to the member’s question is as follows: