Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:5:p1
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 5 (pt 1/10)
Character Range: 147596–150553

5                   Case Studies

Case study 1  Assessment of asbestos contamination in soil –
              poor demolition practice at a residential site
Case study 2  Assessment of asbestos contamination in soil –
              redevelopment of an industrial site for residential use
Case study 3  Application of petroleum hydrocarbon screening levels –
              redevelopment of an industrial site for residential use
Case study 4  Application of soil vapour interim VOCC HILs and HSLs –
              vapour intrusion assessment for a commercial building adjacent to industrial premises
Case study 5  Application of HILs and EILs –
              redevelopment of an industrial site for residential use

For the purposes of illustration, selected summary data only is presented and it can be assumed that the raw data has been evaluated in accordance with the guidance in Section 11 Schedule B2 and that the data has been assessed as being accurate and representative of the site.

Case study 1 - Assessment of asbestos contamination in soil –

poor demolition practices at a residential site

Site scenario

Typical low density residential site (individual house site) where poor demolition practices have resulted in fragments of bonded ACM being scattered over discrete area(s) of the site surface.  In this scenario, there are no substantial fill materials or other sources of potential contamination present at the site. The demolition has occurred in the recent past and no further soil disturbing activities, including removal of sub-surface utilities, have taken place since the buildings were demolished.

Response

Conduct a PSI and a grid-based site inspection survey (walkover) including detailed notes of bonded ACM distribution and condition and nature of surface soils.

A DSI is not necessary provided that the contamination is only at surface/near surface and the bonded ACM is in good condition (non-friable).

The extent of the affected area(s) should be carefully documented and all visible asbestos removed. As the site walkover confirmed that the surface soils were sandy, fragments of bonded ACM can be removed effectively by raking and hand-picking (refer WA DoH (2009) for details of recommended methodology). Sufficient raking passes should be conducted to ensure that the raked depth (approximately 10 cm) is free of visible asbestos.

In this scenario, it is not necessary to sample and analyse surface soils to confirm that no asbestos fibres are present given that the only type of asbestos present is bonded ACM and that it is not severely weathered.

Case study 2 - Assessment of asbestos contamination in soil – redevelopment of an industrial site for residential use

Site Scenario
A former industrial site is proposed for redevelopment for high density residential land use.  The site was historically filled in some areas with material containing bonded ACM to approximately 3 m depth (possibly as a result