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Sequoia 680 Chesapcake Dnve Redwood City,CA 940 (415) 364 9600 FAX(415) 364 9233 <br /> 1900 Bates Avenue,Suite L Concord CA 94520 (510) 686 9600 FAX(510)686 9689 <br /> Analytical 819 Sinker Avenue Suite 8 Sacramento CA 95834 (916) 921 9600 FAX(916)921 0100 <br /> riSY $e.C:h:s fl/r'�'"f v4S'i r'v,.} ivfY3v Q +C}x r� h a r ti�'r 'Rv��x9G:??mvd.vn�sys xs. 'n+a+'.LR-h`. sysvr=^n4�.^v:W.sn�'rw�v.'' S'iS <br /> 1RESNA V<vn, n hrvN r Client Project ID W0564 00, Diamond Walnut <br /> 1710 Main Street Matrix Liquid <br /> Escalon, CA 95320 <br /> Reported May 3, 1994 <br /> Attention Greq Stahl 0C Sample Group 4DG3201-3 x ' <br /> QUALITY CONTROL DATA REPORT <br /> I <br /> ANALYTE Hexavalent <br /> Chromium <br /> Method: EPA 7196 <br /> Analyst C Hirotsu <br /> MS/MSD <br /> Batch#: 4DG3201 <br /> Date Prepared: 4/29/94 <br /> Date Analyzed- 4/29/94 <br /> Instrument I.D.# N/A <br /> Conc.Spiked: 0 50 mg/L <br /> Matrix Spike <br /> % Recovery: 105 <br /> Matrix Spike <br /> Duplicate% <br /> Recovery: 103 <br /> Relative% <br /> Difference 19 <br /> 00' <br /> o'?s <br /> 3�°,i'ra' <br /> LCS Batch#: LCSO42994 <br /> Date Prepared: 4/29/94 <br /> Date Analyzed: 4/29/94 <br /> Instrument I.D.#. N/A <br /> LCS% <br /> Recovery: 100 <br /> IA—Recovery <br /> Control Limas 70-130 <br /> Please Note <br /> The LCS is a control sample of known,interferent free matrix that 1s analyzed using the same reagents, <br /> �EQUOIA ANALYTICAL preparation,and analytical methods employed for the samples The matrix spike is an aliquot of sample <br /> /► fortified with known quantities of specific compounds and subjected to the entire analytical procedure H <br /> the rsoovery of analytes from the matrix spike does not fall within specified control limds due to matrix <br /> interference,the LCS recovery is to be used to validate the batch <br /> Vickie Tague Clark <br /> Project Manager 4DG3201 WAT �2> <br />