Control Sample 3
Control Sample 3 : A sample of material which is known to be identical to a sample suspected of containing accelerant in every regard, except that the control sample does not contain accelerant. A known blank sample. In practical terms, control samples do not exist in the setting of a fire scene because (1) exact conditions during the fire cannot be duplicated from location to location, and (2) exact conditions of the substrate, ie: carpet, etc. , are not known. Carpet in Room A may have had various items spilled on it during use. Carpet B (ten feet away) may be brand new. See: Comparison Sample
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