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W <br /> SEQUOIA ANALYTICAL <br /> 680 Chesapeake Orive • Redwood City,CA 94083 <br /> (415)364-96500 • FAX(415)364 9233 <br /> .@xceltr3ch <br /> Gilent Project ID: #349120-31,Qulk Stop#120,P6421006 <br /> .'41674 Christy Street <br /> �jFremont,CA 94538 Reported:Aug22 1990 <br /> >Attention: John Monroe OC Sample Group 0080771-787 <br /> QUALITY CONTROL DATA REPORT <br /> ANAl.YT B!inzene Tcluene Ethyl xylenes <br /> Benzene — <br /> { <br /> Method: EPA 8020 EPAS020 EPA 8020 EPA 8020 <br /> Analyst: J.Dinsay J.Dinsay J.Dinsay J.Dinsay <br /> Reporting Units: mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed: Aug 13, 1990 Aug t3, 1990 Aug 13, 1990 Aug 13, 1590 <br /> OC Sample#: 008.2465 008.2465 ODS-2465 008-2465 <br /> _. <br /> Sample Conc.: 0.0051 0.014 N.D. 0.045 <br /> Spike Conc. 0.20 0.20 0.60 <br /> Added. 0.20 <br /> Conc.Matrix <br /> Spike: 0.14 0.14 0.15 0.39 <br /> Matrix Spike 75 58- I , <br /> %Recovery: 67 63 <br /> `y Conc.Matrix 0.13 0.36 <br /> Spike Dup.: 0.13 0.13 <br /> r Matrix Spike <br /> Duplicate 58 65 53 <br /> %Recovery: 62 <br /> Relative 7.4 14 8.0 <br /> ii <br /> %Difference: 7.4 <br /> k� <br /> SEQUOIA ANALYTICAL x Recovery Conc.of M.S.-Conc.01 Sample x 100 <br /> ���/�� Spike Conc.Added <br /> 7} Fiolativa!6 Dlttarsnce: Conc.ef M.S. Cane.of M.S.D. x 100 <br /> Vickie Tague (Cone.of M.S.+Conc.of M.S.D.) 2 <br /> i 80771.ENS <3> <br /> Project Manager <br /> t <br /> minim <br />