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aw <br /> 1 <br /> • SE UU _ M,ALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 RECEIVED MAY 3 10 <br /> (415)364-9604 • FAX(415)364-9233 <br /> ' 4SS..�s.X <br /> ..wr..:.;:...;J,;.3..;:a..)AA..�..wa.:.w:ri:::x.t<aew:iN�"C�.x ......---woAw.ksby:.aa.]a�ew i.,,.., .•,..." a%:wr..saaa:r:.`.:::`%,nw,,.:s,..,„a:".�vcf,� '�a+C <br /> Waterwork Client Project 1D:Reeves Exxon,388 <br /> 41710 Main Street r <br /> `Escalon,CA 95320 <br /> �,,Attentlon: BPI Channell QC Sample Group: ID42SM-2995 Reported*May 1, 1991 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Lead Hexavalant Chromium Csdmlum Chromium Z= Lead <br /> Mef!'W: EPA 7421 EPA 7195 EPA 6010 EPA 6010 EPA 6010 FPA 7421 <br /> Analyst: R Eastman Y.A-laaga S.Faster: S.Foster S.Foster V.Patel <br /> Reporting mf�/kg mg/kg mg/kg mg/kg mg/kg mg/kg <br /> Date Anal)'-eed: Apr 24, 1991 Apr 19, 1991 Apr 26. 1g91 Apr 26, 1991 Apr 25. 1991 Apr 30. 1991 <br /> QC Samplo#: 1042988 104-3085 104-4140 104.4140 104-4140 104.2910 <br /> Sample Conc.: 9.3N.D. 4.2 25 54 16 <br /> Spike Gnne. <br /> Added: 50 5.0 250 250 250 50 <br /> Conc.Matrix <br /> Spike: 54 4.8 260 260 270 63 <br /> Matrix Spike <br /> %Recovery: 89 96 100 94 86 94 <br /> Cane.Matrix <br /> Spike Dup.: 53 4.3 220 250 250 58 <br /> Matrix Spike <br /> Duplicate <br /> °.0 Recovery: 87 86 86 90 78 84 <br /> Relative <br /> Difference: 1.9 11 17 3.9 7.7 8.3 <br /> SEQU IA ANALYTICAL. Query. Cone,of M.S.-Conc.of Sample x 100 <br /> Spike Conc.Added <br /> • U L Refatijn%Dilfarence: Conc.of M.S.-Cone.of M.S.O. x 100 <br /> Kl <br /> El <br /> abet We ackl C ane.of M.S.r am a M.S.O.)12 <br /> P ject Manager 1042988.waT <23> <br />