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',~~~ <br />Western Atfas <br />International <br />CORE LABOF~ATORIES <br />EXPLANATION OF DATA FLAGS <br />B - This flag is used to indicate that an analyte is present in <br />the method blank as well as in the sample. It indicates <br />that the user should consider this when evaluating the <br />results. <br />E - This data flag indicates that a sample result is an estimate <br />because the concentration exceeded the calibration range of <br />the instrument. <br />J - Indicates that a value is an estimate. It is used when a <br />compound is determined to be present based on the mass <br />spectral data, but at a concentration less than the <br />practical quantitation limit of the method. This flag is <br />also used when estimating the concentration of a tentatively <br />identified compound. <br />X - This flag refers the client to an included case narrative <br />for additional information which may be useful in data <br />evaluation. <br />