Air testing and sampling strategies are developed using detailed knowledge of the nature and method of the works being conducted and designed to meet the legislative obligations and requirements of our clients and their contractors.
Using static samples to measure the level of airborne asbestos fibres in an area to assist in assessing the effectiveness of implemented control measures.
Personal Exposure Monitoring
This form of asbestos air monitoring would typically be used in locations such as:
- Areas where asbestos containing materials have been identified and to aid in validating risk assessments
- Outside asbestos removal areas and to asbestos removal boundaries to confirm adequacy of implemented control measures during asbestos removal works
- As part of an asbestos clearance inspection within an asbestos removal enclosure upon completion of removal works to confirm that the area can be reoccupied
Carried out to assess, the individual exposure of operatives involved in asbestos removal works are relative to the exposure standard. A common use of exposure data is in the process of determination of the correct respiratory protective equipment (RPE) to be used during asbestos removal works as well as aiding in the risk assessment of works to be conducted and the adequacy of implemented control measures in protecting the workforce.
Disturbed Soil Fibre Respirability Test
This test in various forms has been used for many years on mining projects. The purpose is to give an indication as to whether a given soil / ore type from such locations as exploration drilling holes has the potential to release respirable asbestos fibres when the soil is disturbed later during mining activities.
As part of the test conducted by Eosh before a sample is tested, a number of physical checks occur to minimize the likelihood of asbestos minerals being present within the soil sampled. These include a visual check by the site geologist and a further more detailed inspection is made in the laboratory by a NATA accredited signatory using a Stereo Microscope and a Polarised Light Microscope. Once these checks are complete and confirmation received that asbestos has not been detected then the Fibre Respirability Test (FRT) is conducted.
The FRT is achieved by sampling a dust cloud created from the soil sample within the FRT device, with the sample of air drawn across a membrane filter. The filter is then prepared and analysed in accordance with the asbestos air monitoring guidance note NOHSC: 3003 for estimating airborne asbestos fibres (fibre counting) and the results of the fibre counting are then reported to the client in a fibres/fields reporting format.