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� t 7� v .r _ H <br /> B ' <br /> MU <br /> Q' <br /> SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> (415)364-9600 FAX(415)364-9233 <br /> Data Environmental Consultants C{ient Project HD, 3725 Tracy 8!vd., Shell <br /> :;:3330 Data Drive <br /> `.'Rancho Cordova,CA 95670 Re rted: Dec 3, 1991 <br /> Attention Llsa Ranger QC Sample Group 1114567 68 PQ <br /> QUALITY CONTROL DATA REPORT <br /> WAU TE Ethyl- <br /> Benzene Toluene Benzene X ones <br /> Method: PPA 8020 EPA 8424 EPA 8020 EPA 8020 <br /> Analyst: M.Laikhtman M.Lalkhtman M.Laikhtman M.Laikhtman <br /> Reporting UORS: pg/L pg/L Fps/L pa/L <br /> Date Analyzed: Dec 2, 1991 Dec 2, 1991 Dp,, 2, 1391 Dec P, 1991 <br /> QC Sample#: GBLK120291 GBLK120291 GSLK120291 GBLKM291 <br /> Sample Conc: N.D. N.D. N.D. N.D. <br /> pike Conc. <br /> Added: 10 10 10 30 <br /> Conc.Matrix <br /> Spike: 9.8 9.9 10 29 <br /> Matrix Spike <br /> %Recovery: 98 99 100 97 <br /> Conc.Matrix 29 <br /> Spike Dup.: 9.2 9.6 9-S <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 92 96 98 97 <br /> Relative <br /> 6 Difference: 6.4 3.1 2 0 0 0 <br /> UQIA ANALYTICAL %Recovery: � Conc,cf M.S.-Conc.or Sar:Pte x100 <br /> spike Cone.Added <br /> .1ative Difference: Conn of M.S.-Conc.of M S D. x 104 <br /> _MaileA.Springer ���JJJ"��, lcanc.of M.S. } Conc.of M.S.D.)J2 <br /> 11145W.DLT 3> <br /> Project Manager <br />