Inconclusive range values have been adjusted to reflect revised inconclusive range definition, in order to keep conclusions unchanged. May assume positive results for similar building component types, if supported by data from the first 5 rooms and if the client agrees to the suspension. Sample fewer units in 1960 to 1977 multifamily housing, based on known lower amount of lead-based paint used in that era. For clear-coated floors, take one reading in one room equivalent if the finish appears to be the same across rooms. Characteristic Sheets New edition of PCSs reorganized with key information up front.
Some instruments have inconclusive ranges.
The inconclusive range depends on the XRF model, the substrate and the nominal reading time. The second edition of each PCS has been adjusted to reflect the change of the inconclusive range so that the conclusions of inspections using the first edition are still valid. Some instruments have a threshold value. The threshold depends on the XRF model, the substrate and the nominal reading time. The definition of threshold is the same for the first and second editions of the PCSs, so the values have not changed.