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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364-9600 FAX(415) 364-9233 <br /> -eo:fie:""":�'a „'^Y a rti ,-y^x A v,.`„„y-..v,- � ���ti r* srr n o j, ne , }, {V.iv,n µr'l`n:`o�"rs r,r..�i,.-r,r,�.�. � ,....?,r,.,,., oe�w.v,wh�,i;.,.rt`i"••c,� sr�n, �`Y� <br /> ;RESNA Client Project IDr W0388, reeves Exxon/Tracy <br /> 1710 Main Street <br /> Escaion, CA 95320 <br /> Attention Greg Stahl QC Sample Group204-4326w Y Resorted May 7, 1992 _ <br /> 'ot:" m n{a at lr v, r .s,,,,. tssn k gra v -n Sr x c t Yiwµj s.•s osr ks :`si::'2 '”i's ,n e tt 74 fvtrt+�`.cf�y:.-,`µ"ti'e^^{. <br /> ;�,.w.,.a..,,....h4.;,cc..cohw'°aanwno, <br /> s.w.hxa,xek�r S<,.rhv. <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE High Boding Point 1,1-Dichioroethene Tnchiore- Chloro- <br /> Hydrocarbons ethene benzene <br /> Method EPA 8015 EPA 0010 EPA 8010 EPA 8010 <br /> Analyst M Tran M Laukhtman M Laikhtman M Laikhtman <br /> Reporting Units mg/kg ug/kg ug/kg ug/kg <br /> Date Analyzed Apr 29, 1992 May 2, 1992 May 2, 1992 May 2, 1992 <br /> QC Sample# DBLK042992 VBLK050292 VBLK050292 VBLK050292 <br /> Sample Conc.- N D N D N D N D <br />.� Spike Conc. <br /> Added- 15 50 50 50 <br /> Conc. Matrix <br /> Spike: 10 66 45 51 <br /> Matrix Spike <br /> % Recovery: 67 132 90 102 <br /> Conc. Matrix <br /> Spike Dup.: 10 64 46 50 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 67 128 92 100 <br /> Relative <br /> %Difference. 00 31 22 20 <br /> *SEQUOIA ANALYTICAL %Recovery Conc of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> Relative%Difference Conc of M S -Conc of M S D x 100 <br /> Fdctole <br /> g (Conc of M S + Conc of M S D) 2 <br /> anager 204432 WAT <6> <br />