A number of mold testing methods are available for the detection of mold contamination in indoor environment. Testing can be performed on dust from carpet, floor, mattress, or other surfaces; bulk material such as pieces of drywall, carpet, ceiling tiles, wallpaper and wood. In some cases air testing may be necessary. When should one test for mold in dust, on bulk material or in air? The decision should be based on the objectives of the investigations being conducted. The objectives of the investigation should help determine the type of data required, that is, either qualitative or quantitative and subsequently the type of samples to collect and the method the lab should use.

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