Active air sampling procedure in class D ares

What is Active air sampling procedure please define sample volume,sample location as per guidelines

Active air sampling is done by air sampler and 1000 ltr air is sampled. Sample location would be same as passive air sampling method.

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Volumetric air sampling method (active air sampling) can be done by using air sampler (e.g mas 100 / AES lite). sampling location can be selected based on rationale and risk assessment.

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