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N,, 1�610` Page 8 of 12 <br /> alscience <br /> nvironmental Quality Control - Laboratory Control Sample <br /> AN aboratories, Inc. ex <br /> Kiff Analytical Date Received: N/A <br /> 2795 2nd Street, Suite 300 Work Order No: 07-03-1184 <br /> Davis, CA 95616-6593 <br /> Project: Tracy High School <br /> Matrix: Solid <br /> Quality Control Date Date one Conc LCS %Rec <br /> Parameter Method Sample ID Analyzed Extracted Added Recovered % CLQualifiers <br /> Chromium,Hexavalent EPA 7196A 099-05.001-2,419 03/21/06 03r21106 20.0 18.0 90 80-120 <br /> RPD <br /> '`Relative Percent Difference. CL-Control Limit <br /> 7440 Lincoln Way, Garden Grove, CA 92841-1427 . TEL:(714)895-5494 . FAX: (714)894-7501 <br />