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Inorganic Data Reporting Qualifiers <br />The following qualifiers are used by the laboratory when reporting results of inorganic <br />analyses. <br />• Result qualifier -- If the analyte was analyzed for but not detected a "U" is entered. <br />• QC qualifier -- Specified entries and their meanings are as follows: <br />E - The reported value is estimated because of the presence of interference. An <br />explanatory note may be included in the narrative. <br />M - Duplicate injection precision was not met. <br />N - Spiked sample recovery not within control limits. A post spike is analyzed for all <br />200.8 analyses when the matrix spike and or spike duplicate fail and the native <br />sample concentration is less than four times the spike added concentration. <br />Z - Spiked recovery not within control limits. An explanatory note may be included in <br />the narrative. <br />Duplicate analysis (relative percent difference) not within control limits. <br />5 <br />