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• <br /> March 30, 2015 Lab ID : STK1532135 <br /> Paul Abbate Customer : 3-13758 <br /> Quality Control- Inorganic <br /> Definition <br /> ND :Non-detect-Result was below the DQO listed for the analyte. <br /> <'/4 :High Sample Background-Spike concentration was less than one forth of the sample concentration. <br /> D O :Data Quality Objective-This is the criteria against which the quality control data is compared. <br /> Explanation <br /> 430 :Post Digestion Spike(PDS)not within Acceptance Range(AR)because of matrix interferences affecting this analyte. <br /> 435 :Sample matrix may be affecting this analyte.Data was accepted based on the LCS or CCV recovery. <br /> Page 21 of 22 <br />