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WAGL~' <br />CORE LABORATORIES <br />O U A L I 1 Y A S S U R A N C E M E T H O D S <br />R E f E R E N L.E 5 A N D N O T E S <br />Report.:Dd;e: 12/27/96 <br />This flag is also used when estimating the <br />concentration of a tentatively identified compound. <br />x - Indicates that a surrogate recovery is outside the <br />specified quality control limits. <br />Y - Used to identity a spike or spike duplicate <br />recovery that is outside the specified quality control <br />Limits. <br />Z - Indicates a relative percent difference for a spike <br />and spike duplicate is outside the specified quality <br />control limits. <br />• - Indicates a relative percent difference for a <br />duplicate analysis is outside the specified quality <br />control limits. <br />• Used to indicate that a standard is outside <br />specified quality control Limits. <br />Page 5 <br />~~ <br />