Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:4:p11
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 4 (pt 11/11)
Character Range: 145730–147594

are present, either a Tier 2 analysis should be carried out or a conservative management response implemented. The Tier 2 assessment will comprise a qualitative assessment of risk in many cases and should take into account the nature and extent of contamination; the site-specific exposure scenario(s) including the intensity of relevant site activities; the impact of any mitigating factors such as soil type and soil moisture conditions (and likely variation); the proposed remediation and management measures; and the final use of the site.

Remediation options which minimise soil disturbance and therefore public risk are preferred. Management of asbestos in situ is encouraged, which may include covering the contamination with uncontaminated fill or other protective or warning layers. It should be noted that the common alternative of complete removal of asbestos from a site often involves extensive and costly investigative and validation sampling and may not be effective or necessary for the protection of human health.
Regulatory authorities may consider statutory management controls to land with substantial asbestos contamination to ensure that appropriate management conditions, including land use limitations, apply to the site. These controls may include notation on title, approved management and listing on public site contamination registers or ongoing controls under audit statements and planning controls, as relevant for the jurisdiction.

Additional information on the assessment approach is provided in Schedule B2 and WA DoH (2009 and 2011).

Further information on risk assessment, remediation and management procedures can be found in Section 5 of the WA DoH Guidelines (2009).

The recommended approach for circumstances involving bonded ACM (the commonest form of asbestos contamination) is illustrated by the included case studies.