New York State Asbestos Investigator Practice Exam

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What is the main rule for sampling of TSI?

Collect a minimum of 5 samples from each site
Collect in a randomly distributed way at least 3 samples per homogenous area
Sample only when the material is disturbed
Use a minimum of 2 samples for analysis

The correct answer is: Collect in a randomly distributed way at least 3 samples per homogenous area

The emphasis on collecting at least three samples from each homogeneous area in a randomly distributed manner underscores the importance of obtaining a representative sampling of Thermal System Insulation (TSI) materials. This approach is essential because TSI can vary significantly in composition and condition even within small areas. By ensuring that samples are randomly distributed and abundant enough, the quality and reliability of the results are enhanced, allowing for a more accurate assessment of asbestos presence. The rationale behind this sampling rule is rooted in statistical principles that govern sampling methods; collecting a small number of samples, or not ensuring their randomness, could lead to inconclusive or misleading results, which may fail to recognize the presence of hazardous materials. Ensuring multiple samples helps to confirm whether TSI contains asbestos and aids in developing an effective plan for managing any identified risks.