Have lab analyze positives and high inconclusives

A high inconclusive reading is an XRF reading at or above the midpoint of the inconclusive range (if it equals) around 1.0 mg/cm2 for the instrument model that is used (see PCS). For example, if the model’s PCS states the inconclusive range is 0.41 to 1.39, then the midpoint would be 0.90. A high inconclusive reading would be from 0.90 to 1.39, and a low inconclusive reading would be from 0.41 to 0.39.